^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * OMAP2/3/4 clockdomain framework functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2008-2011 Texas Instruments, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2008-2011 Nokia Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Written by Paul Walmsley and Jouni Högander
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/limits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/clk-provider.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/cpu_pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "soc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "clock.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "clockdomain.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "pm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* clkdm_list contains all registered struct clockdomains */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static LIST_HEAD(clkdm_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* array of clockdomain deps to be added/removed when clkdm in hwsup mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct clkdm_autodep *autodeps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static struct clkdm_ops *arch_clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void clkdm_save_context(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) void clkdm_restore_context(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Private functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static struct clockdomain *_clkdm_lookup(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct clockdomain *clkdm, *temp_clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) clkdm = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) list_for_each_entry(temp_clkdm, &clkdm_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!strcmp(name, temp_clkdm->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) clkdm = temp_clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * _clkdm_register - register a clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * @clkdm: struct clockdomain * to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Adds a clockdomain to the internal clockdomain list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * Returns -EINVAL if given a null pointer, -EEXIST if a clockdomain is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * already registered by the provided name, or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static int _clkdm_register(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct powerdomain *pwrdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!clkdm || !clkdm->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) pwrdm = pwrdm_lookup(clkdm->pwrdm.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (!pwrdm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) pr_err("clockdomain: %s: powerdomain %s does not exist\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) clkdm->name, clkdm->pwrdm.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) clkdm->pwrdm.ptr = pwrdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /* Verify that the clockdomain is not already registered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (_clkdm_lookup(clkdm->name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) list_add(&clkdm->node, &clkdm_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) pwrdm_add_clkdm(pwrdm, clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) pr_debug("clockdomain: registered %s\n", clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* _clkdm_deps_lookup - look up the specified clockdomain in a clkdm list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static struct clkdm_dep *_clkdm_deps_lookup(struct clockdomain *clkdm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct clkdm_dep *deps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!clkdm || !deps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) for (cd = deps; cd->clkdm_name; cd++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (!cd->clkdm && cd->clkdm_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) cd->clkdm = _clkdm_lookup(cd->clkdm_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (cd->clkdm == clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!cd->clkdm_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * _autodep_lookup - resolve autodep clkdm names to clkdm pointers; store
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @autodep: struct clkdm_autodep * to resolve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Resolve autodep clockdomain names to clockdomain pointers via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * clkdm_lookup() and store the pointers in the autodep structure. An
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * "autodep" is a clockdomain sleep/wakeup dependency that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * automatically added and removed whenever clocks in the associated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * clockdomain are enabled or disabled (respectively) when the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * clockdomain is in hardware-supervised mode. Meant to be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * once at clockdomain layer initialization, since these should remain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * fixed for a particular architecture. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * XXX autodeps are deprecated and should be removed at the earliest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * opportunity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static void _autodep_lookup(struct clkdm_autodep *autodep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct clockdomain *clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!autodep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) clkdm = clkdm_lookup(autodep->clkdm.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!clkdm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) pr_err("clockdomain: autodeps: clockdomain %s does not exist\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) autodep->clkdm.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) clkdm = ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) autodep->clkdm.ptr = clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * _resolve_clkdm_deps() - resolve clkdm_names in @clkdm_deps to clkdms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * @clkdm: clockdomain that we are resolving dependencies for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * @clkdm_deps: ptr to array of struct clkdm_deps to resolve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * Iterates through @clkdm_deps, looking up the struct clockdomain named by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * clkdm_name and storing the clockdomain pointer in the struct clkdm_dep.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void _resolve_clkdm_deps(struct clockdomain *clkdm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct clkdm_dep *clkdm_deps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) for (cd = clkdm_deps; cd && cd->clkdm_name; cd++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (cd->clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) cd->clkdm = _clkdm_lookup(cd->clkdm_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) WARN(!cd->clkdm, "clockdomain: %s: could not find clkdm %s while resolving dependencies - should never happen",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) clkdm->name, cd->clkdm_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * _clkdm_add_wkdep - add a wakeup dependency from clkdm2 to clkdm1 (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * @clkdm1: wake this struct clockdomain * up (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * @clkdm2: when this struct clockdomain * wakes up (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * When the clockdomain represented by @clkdm2 wakes up, wake up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * @clkdm1. Implemented in hardware on the OMAP, this feature is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * designed to reduce wakeup latency of the dependent clockdomain @clkdm1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * Returns -EINVAL if presented with invalid clockdomain pointers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or 0 upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int _clkdm_add_wkdep(struct clockdomain *clkdm1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!arch_clkdm || !arch_clkdm->clkdm_add_wkdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) cd->wkdep_usecount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (cd->wkdep_usecount == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) pr_debug("clockdomain: hardware will wake up %s when %s wakes up\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * _clkdm_del_wkdep - remove a wakeup dep from clkdm2 to clkdm1 (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * @clkdm1: wake this struct clockdomain * up (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * @clkdm2: when this struct clockdomain * wakes up (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Remove a wakeup dependency causing @clkdm1 to wake up when @clkdm2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * wakes up. Returns -EINVAL if presented with invalid clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * pointers, -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static int _clkdm_del_wkdep(struct clockdomain *clkdm1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (!arch_clkdm || !arch_clkdm->clkdm_del_wkdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) cd->wkdep_usecount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (cd->wkdep_usecount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) pr_debug("clockdomain: hardware will no longer wake up %s after %s wakes up\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * _clkdm_add_sleepdep - add a sleep dependency from clkdm2 to clkdm1 (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * @clkdm2: when this struct clockdomain * is active (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * Prevent @clkdm1 from automatically going inactive (and then to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * retention or off) if @clkdm2 is active. Returns -EINVAL if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * presented with invalid clockdomain pointers or called on a machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * that does not support software-configurable hardware sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * dependencies, -ENOENT if the specified dependency cannot be set in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * hardware, or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static int _clkdm_add_sleepdep(struct clockdomain *clkdm1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) cd->sleepdep_usecount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (cd->sleepdep_usecount == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) pr_debug("clockdomain: will prevent %s from sleeping if %s is active\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * _clkdm_del_sleepdep - remove a sleep dep from clkdm2 to clkdm1 (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * @clkdm2: when this struct clockdomain * is active (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * Allow @clkdm1 to automatically go inactive (and then to retention or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * off), independent of the activity state of @clkdm2. Returns -EINVAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * if presented with invalid clockdomain pointers or called on a machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * that does not support software-configurable hardware sleep dependencies,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * -ENOENT if the specified dependency cannot be cleared in hardware, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static int _clkdm_del_sleepdep(struct clockdomain *clkdm1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (!arch_clkdm || !arch_clkdm->clkdm_del_sleepdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) cd->sleepdep_usecount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (cd->sleepdep_usecount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) pr_debug("clockdomain: will no longer prevent %s from sleeping if %s is active\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* Public functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * clkdm_register_platform_funcs - register clockdomain implementation fns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * @co: func pointers for arch specific implementations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * Register the list of function pointers used to implement the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * clockdomain functions on different OMAP SoCs. Should be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * before any other clkdm_register*() function. Returns -EINVAL if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * @co is null, -EEXIST if platform functions have already been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * registered, or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int clkdm_register_platform_funcs(struct clkdm_ops *co)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (!co)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (arch_clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) arch_clkdm = co;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * clkdm_register_clkdms - register SoC clockdomains
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * @cs: pointer to an array of struct clockdomain to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * Register the clockdomains available on a particular OMAP SoC. Must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * be called after clkdm_register_platform_funcs(). May be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * multiple times. Returns -EACCES if called before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * clkdm_register_platform_funcs(); -EINVAL if the argument @cs is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * null; or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int clkdm_register_clkdms(struct clockdomain **cs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct clockdomain **c = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (!arch_clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (!cs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) for (c = cs; *c; c++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) _clkdm_register(*c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * clkdm_register_autodeps - register autodeps (if required)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * @ia: pointer to a static array of struct clkdm_autodep to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * Register clockdomain "automatic dependencies." These are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * clockdomain wakeup and sleep dependencies that are automatically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * added whenever the first clock inside a clockdomain is enabled, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * removed whenever the last clock inside a clockdomain is disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * These are currently only used on OMAP3 devices, and are deprecated,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * since they waste energy. However, until the OMAP2/3 IP block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * enable/disable sequence can be converted to match the OMAP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * sequence, they are needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * Must be called only after all of the SoC clockdomains are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * registered, since the function will resolve autodep clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * names into clockdomain pointers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * The struct clkdm_autodep @ia array must be static, as this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * does not copy the array elements.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * Returns -EACCES if called before any clockdomains have been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * registered, -EINVAL if called with a null @ia argument, -EEXIST if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * autodeps have already been registered, or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) int clkdm_register_autodeps(struct clkdm_autodep *ia)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct clkdm_autodep *a = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (list_empty(&clkdm_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (!ia)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (autodeps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) autodeps = ia;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) for (a = autodeps; a->clkdm.ptr; a++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) _autodep_lookup(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) case CPU_CLUSTER_PM_ENTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (enable_off_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) clkdm_save_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) case CPU_CLUSTER_PM_EXIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (enable_off_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) clkdm_restore_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * clkdm_complete_init - set up the clockdomain layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * Put all clockdomains into software-supervised mode; PM code should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) * later enable hardware-supervised mode as appropriate. Must be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * called after clkdm_register_clkdms(). Returns -EACCES if called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * before clkdm_register_clkdms(), or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) int clkdm_complete_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct clockdomain *clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static struct notifier_block nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (list_empty(&clkdm_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) list_for_each_entry(clkdm, &clkdm_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) clkdm_deny_idle(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) _resolve_clkdm_deps(clkdm, clkdm->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) clkdm_clear_all_wkdeps(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) _resolve_clkdm_deps(clkdm, clkdm->sleepdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) clkdm_clear_all_sleepdeps(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /* Only AM43XX can lose clkdm context during rtc-ddr suspend */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (soc_is_am43xx()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) nb.notifier_call = cpu_notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) cpu_pm_register_notifier(&nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * clkdm_lookup - look up a clockdomain by name, return a pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * @name: name of clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) * Find a registered clockdomain by its name @name. Returns a pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) * to the struct clockdomain if found, or NULL otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) struct clockdomain *clkdm_lookup(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) struct clockdomain *clkdm, *temp_clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) clkdm = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) list_for_each_entry(temp_clkdm, &clkdm_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (!strcmp(name, temp_clkdm->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) clkdm = temp_clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * clkdm_for_each - call function on each registered clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * @fn: callback function *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * Call the supplied function @fn for each registered clockdomain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * The callback function @fn can return anything but 0 to bail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) * out early from the iterator. The callback function is called with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * the clkdm_mutex held, so no clockdomain structure manipulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * functions should be called from the callback, although hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * clockdomain control functions are fine. Returns the last return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * value of the callback function, which should be 0 for success or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) * anything else to indicate failure; or -EINVAL if the function pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) * is null.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) void *user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) struct clockdomain *clkdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (!fn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) list_for_each_entry(clkdm, &clkdm_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) ret = (*fn)(clkdm, user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * clkdm_get_pwrdm - return a ptr to the pwrdm that this clkdm resides in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * Return a pointer to the struct powerdomain that the specified clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * @clkdm exists in, or returns NULL if @clkdm is NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return clkdm->pwrdm.ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) /* Hardware clockdomain control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) * clkdm_add_wkdep - add a wakeup dependency from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * @clkdm1: wake this struct clockdomain * up (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * @clkdm2: when this struct clockdomain * wakes up (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * When the clockdomain represented by @clkdm2 wakes up, wake up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) * @clkdm1. Implemented in hardware on the OMAP, this feature is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) * designed to reduce wakeup latency of the dependent clockdomain @clkdm1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) * Returns -EINVAL if presented with invalid clockdomain pointers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or 0 upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) return PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) pwrdm_lock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) ret = _clkdm_add_wkdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) pwrdm_unlock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * clkdm_del_wkdep - remove a wakeup dependency from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * @clkdm1: wake this struct clockdomain * up (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * @clkdm2: when this struct clockdomain * wakes up (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * Remove a wakeup dependency causing @clkdm1 to wake up when @clkdm2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * wakes up. Returns -EINVAL if presented with invalid clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * pointers, -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) pwrdm_lock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) ret = _clkdm_del_wkdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) pwrdm_unlock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) * clkdm_read_wkdep - read wakeup dependency state from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) * @clkdm1: wake this struct clockdomain * up (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) * @clkdm2: when this struct clockdomain * wakes up (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) * Return 1 if a hardware wakeup dependency exists wherein @clkdm1 will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) * awoken when @clkdm2 wakes up; 0 if dependency is not set; -EINVAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * if either clockdomain pointer is invalid; or -ENOENT if the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * is incapable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * REVISIT: Currently this function only represents software-controllable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) * wakeup dependencies. Wakeup dependencies fixed in hardware are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * yet handled here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (!arch_clkdm || !arch_clkdm->clkdm_read_wkdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /* XXX It's faster to return the wkdep_usecount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) return arch_clkdm->clkdm_read_wkdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) * clkdm_clear_all_wkdeps - remove all wakeup dependencies from target clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) * @clkdm: struct clockdomain * to remove all wakeup dependencies from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) * Remove all inter-clockdomain wakeup dependencies that could cause
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) * @clkdm to wake. Intended to be used during boot to initialize the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * PRCM to a known state, after all clockdomains are put into swsup idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) * and woken up. Returns -EINVAL if @clkdm pointer is invalid, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) int clkdm_clear_all_wkdeps(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_wkdeps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) return arch_clkdm->clkdm_clear_all_wkdeps(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) * clkdm_add_sleepdep - add a sleep dependency from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * @clkdm2: when this struct clockdomain * is active (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * Prevent @clkdm1 from automatically going inactive (and then to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * retention or off) if @clkdm2 is active. Returns -EINVAL if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * presented with invalid clockdomain pointers or called on a machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * that does not support software-configurable hardware sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) * dependencies, -ENOENT if the specified dependency cannot be set in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) * hardware, or 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) return PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) pwrdm_lock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) ret = _clkdm_add_sleepdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) pwrdm_unlock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) * clkdm_del_sleepdep - remove a sleep dependency from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) * @clkdm2: when this struct clockdomain * is active (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) * Allow @clkdm1 to automatically go inactive (and then to retention or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) * off), independent of the activity state of @clkdm2. Returns -EINVAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) * if presented with invalid clockdomain pointers or called on a machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * that does not support software-configurable hardware sleep dependencies,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * -ENOENT if the specified dependency cannot be cleared in hardware, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) return PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) pwrdm_lock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) ret = _clkdm_del_sleepdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) pwrdm_unlock(cd->clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * clkdm_read_sleepdep - read sleep dependency state from clkdm2 to clkdm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) * @clkdm2: when this struct clockdomain * is active (source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) * Return 1 if a hardware sleep dependency exists wherein @clkdm1 will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) * not be allowed to automatically go inactive if @clkdm2 is active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) * 0 if @clkdm1's automatic power state inactivity transition is independent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) * of @clkdm2's; -EINVAL if either clockdomain pointer is invalid or called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) * on a machine that does not support software-configurable hardware sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) * dependencies; or -ENOENT if the hardware is incapable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) * REVISIT: Currently this function only represents software-controllable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) * sleep dependencies. Sleep dependencies fixed in hardware are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) * yet handled here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) struct clkdm_dep *cd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) if (!clkdm1 || !clkdm2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (IS_ERR(cd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) ret = PTR_ERR(cd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (!arch_clkdm || !arch_clkdm->clkdm_read_sleepdep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) clkdm1->name, clkdm2->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) /* XXX It's faster to return the sleepdep_usecount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) return arch_clkdm->clkdm_read_sleepdep(clkdm1, clkdm2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * clkdm_clear_all_sleepdeps - remove all sleep dependencies from target clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * @clkdm: struct clockdomain * to remove all sleep dependencies from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) * Remove all inter-clockdomain sleep dependencies that could prevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * @clkdm from idling. Intended to be used during boot to initialize the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * PRCM to a known state, after all clockdomains are put into swsup idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * and woken up. Returns -EINVAL if @clkdm pointer is invalid, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_sleepdeps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return arch_clkdm->clkdm_clear_all_sleepdeps(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * clkdm_sleep_nolock - force clockdomain sleep transition (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * Instruct the CM to force a sleep transition on the specified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) * clockdomain @clkdm. Only for use by the powerdomain code. Returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) * -EINVAL if @clkdm is NULL or if clockdomain does not support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) * software-initiated sleep; 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) int clkdm_sleep_nolock(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (!(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) pr_debug("clockdomain: %s does not support forcing sleep via software\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (!arch_clkdm || !arch_clkdm->clkdm_sleep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) ret = arch_clkdm->clkdm_sleep(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) ret |= pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) * clkdm_sleep - force clockdomain sleep transition
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) * Instruct the CM to force a sleep transition on the specified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) * clockdomain does not support software-initiated sleep; 0 upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) * success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) int clkdm_sleep(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) ret = clkdm_sleep_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) * clkdm_wakeup_nolock - force clockdomain wakeup transition (lockless)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) * Instruct the CM to force a wakeup transition on the specified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) * clockdomain @clkdm. Only for use by the powerdomain code. Returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) * -EINVAL if @clkdm is NULL or if the clockdomain does not support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) * software-controlled wakeup; 0 upon success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) int clkdm_wakeup_nolock(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (!(clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) pr_debug("clockdomain: %s does not support forcing wakeup via software\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (!arch_clkdm || !arch_clkdm->clkdm_wakeup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) ret = arch_clkdm->clkdm_wakeup(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) ret |= pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) * clkdm_wakeup - force clockdomain wakeup transition
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) * Instruct the CM to force a wakeup transition on the specified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) * clockdomain does not support software-controlled wakeup; 0 upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) * success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) int clkdm_wakeup(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) ret = clkdm_wakeup_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) * clkdm_allow_idle_nolock - enable hwsup idle transitions for clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) * Allow the hardware to automatically switch the clockdomain @clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) * into active or idle states, as needed by downstream clocks. If the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) * clockdomain has any downstream clocks enabled in the clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) * framework, wkdep/sleepdep autodependencies are added; this is so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) * device drivers can read and write to the device. Only for use by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * the powerdomain code. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) void clkdm_allow_idle_nolock(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (!WARN_ON(!clkdm->forcewake_count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) clkdm->forcewake_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) if (clkdm->forcewake_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) if (!clkdm->usecount && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) clkdm_sleep_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) if (!(clkdm->flags & CLKDM_CAN_ENABLE_AUTO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (!arch_clkdm || !arch_clkdm->clkdm_allow_idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) clkdm->_flags |= _CLKDM_FLAG_HWSUP_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) arch_clkdm->clkdm_allow_idle(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) * clkdm_allow_idle - enable hwsup idle transitions for clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) * Allow the hardware to automatically switch the clockdomain @clkdm into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) * active or idle states, as needed by downstream clocks. If the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) * clockdomain has any downstream clocks enabled in the clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) * framework, wkdep/sleepdep autodependencies are added; this is so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) * device drivers can read and write to the device. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) void clkdm_allow_idle(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) clkdm_allow_idle_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) * clkdm_deny_idle - disable hwsup idle transitions for clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) * Prevent the hardware from automatically switching the clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * @clkdm into inactive or idle states. If the clockdomain has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) * downstream clocks enabled in the clock framework, wkdep/sleepdep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) * autodependencies are removed. Only for use by the powerdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) * code. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) void clkdm_deny_idle_nolock(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) if (clkdm->forcewake_count++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) clkdm_wakeup_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (!(clkdm->flags & CLKDM_CAN_DISABLE_AUTO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) if (!arch_clkdm || !arch_clkdm->clkdm_deny_idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) arch_clkdm->clkdm_deny_idle(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) * clkdm_deny_idle - disable hwsup idle transitions for clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) * Prevent the hardware from automatically switching the clockdomain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) * @clkdm into inactive or idle states. If the clockdomain has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) * downstream clocks enabled in the clock framework, wkdep/sleepdep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) * autodependencies are removed. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) void clkdm_deny_idle(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) clkdm_deny_idle_nolock(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) * clkdm_in_hwsup - is clockdomain @clkdm have hardware-supervised idle enabled?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) * Returns true if clockdomain @clkdm currently has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) * hardware-supervised idle enabled, or false if it does not or if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) * @clkdm is NULL. It is only valid to call this function after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) * clkdm_init() has been called. This function does not actually read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) * bits from the hardware; it instead tests an in-memory flag that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) * changed whenever the clockdomain code changes the auto-idle mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) bool clkdm_in_hwsup(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) bool ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) ret = (clkdm->_flags & _CLKDM_FLAG_HWSUP_ENABLED) ? true : false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) * clkdm_missing_idle_reporting - can @clkdm enter autoidle even if in use?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) * Returns true if clockdomain @clkdm has the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) * CLKDM_MISSING_IDLE_REPORTING flag set, or false if not or @clkdm is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) * null. More information is available in the documentation for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) * CLKDM_MISSING_IDLE_REPORTING macro.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) bool clkdm_missing_idle_reporting(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if (!clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) return (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) ? true : false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) /* Public autodep handling functions (deprecated) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) * clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) * Add the "autodep" sleep & wakeup dependencies to clockdomain 'clkdm'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) * in hardware-supervised mode. Meant to be called from clock framework
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) * when a clock inside clockdomain 'clkdm' is enabled. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) * XXX autodeps are deprecated and should be removed at the earliest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) * opportunity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) void clkdm_add_autodeps(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) struct clkdm_autodep *autodep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) if (IS_ERR(autodep->clkdm.ptr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) pr_debug("clockdomain: %s: adding %s sleepdep/wkdep\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) clkdm->name, autodep->clkdm.ptr->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) _clkdm_add_sleepdep(clkdm, autodep->clkdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) _clkdm_add_wkdep(clkdm, autodep->clkdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) * clkdm_del_autodeps - remove auto sleepdeps/wkdeps from clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) * Remove the "autodep" sleep & wakeup dependencies from clockdomain 'clkdm'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) * in hardware-supervised mode. Meant to be called from clock framework
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) * when a clock inside clockdomain 'clkdm' is disabled. No return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) * XXX autodeps are deprecated and should be removed at the earliest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) * opportunity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) void clkdm_del_autodeps(struct clockdomain *clkdm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) struct clkdm_autodep *autodep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (IS_ERR(autodep->clkdm.ptr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) pr_debug("clockdomain: %s: removing %s sleepdep/wkdep\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) clkdm->name, autodep->clkdm.ptr->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) _clkdm_del_sleepdep(clkdm, autodep->clkdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) _clkdm_del_wkdep(clkdm, autodep->clkdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) /* Clockdomain-to-clock/hwmod framework interface code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) * clkdm_clk_enable - add an enabled downstream clock to this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) * @clk: struct clk * of the enabled downstream clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) * Increment the usecount of the clockdomain @clkdm and ensure that it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) * is awake before @clk is enabled. Intended to be called by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) * clk_enable() code. If the clockdomain is in software-supervised
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) * idle mode, force the clockdomain to wake. If the clockdomain is in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) * hardware-supervised idle mode, add clkdm-pwrdm autodependencies, to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) * ensure that devices in the clockdomain can be read from/written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) * by on-chip processors. Returns -EINVAL if passed null pointers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) * returns 0 upon success or if the clockdomain is in hwsup idle mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) * For arch's with no autodeps, clkcm_clk_enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) * should be called for every clock instance or hwmod that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) * enabled, so the clkdm can be force woken up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) clkdm->usecount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) if (clkdm->usecount > 1 && autodeps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) arch_clkdm->clkdm_clk_enable(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) pr_debug("clockdomain: %s: enabled\n", clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) * clkdm_clk_disable - remove an enabled downstream clock from this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) * @clk: struct clk * of the disabled downstream clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) * Decrement the usecount of this clockdomain @clkdm when @clk is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) * disabled. Intended to be called by clk_disable() code. If the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) * clockdomain usecount goes to 0, put the clockdomain to sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) * (software-supervised mode) or remove the clkdm autodependencies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) * (hardware-supervised mode). Returns -EINVAL if passed null
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) * pointers; -ERANGE if the @clkdm usecount underflows; or returns 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) * upon success or if the clockdomain is in hwsup idle mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) pwrdm_lock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) /* corner case: disabling unused clocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) if (clk && (__clk_get_enable_count(clk) == 0) && clkdm->usecount == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) goto ccd_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) if (clkdm->usecount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) WARN_ON(1); /* underflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) clkdm->usecount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) if (clkdm->usecount > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) arch_clkdm->clkdm_clk_disable(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) pr_debug("clockdomain: %s: disabled\n", clkdm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) ccd_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) pwrdm_unlock(clkdm->pwrdm.ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * clkdm_hwmod_enable - add an enabled downstream hwmod to this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) * @oh: struct omap_hwmod * of the enabled downstream hwmod
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) * Increment the usecount of the clockdomain @clkdm and ensure that it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) * is awake before @oh is enabled. Intended to be called by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) * module_enable() code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) * If the clockdomain is in software-supervised idle mode, force the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) * clockdomain to wake. If the clockdomain is in hardware-supervised idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) * mode, add clkdm-pwrdm autodependencies, to ensure that devices in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) * clockdomain can be read from/written to by on-chip processors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) * Returns -EINVAL if passed null pointers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) * returns 0 upon success or if the clockdomain is in hwsup idle mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) /* The clkdm attribute does not exist yet prior OMAP4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) if (cpu_is_omap24xx() || cpu_is_omap34xx())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) * XXX Rewrite this code to maintain a list of enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) * downstream hwmods for debugging purposes?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) if (!oh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) return clkdm_clk_enable(clkdm, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) * clkdm_hwmod_disable - remove an enabled downstream hwmod from this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) * @clkdm: struct clockdomain *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) * @oh: struct omap_hwmod * of the disabled downstream hwmod
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) * Decrement the usecount of this clockdomain @clkdm when @oh is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) * disabled. Intended to be called by module_disable() code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) * If the clockdomain usecount goes to 0, put the clockdomain to sleep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) * (software-supervised mode) or remove the clkdm autodependencies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) * (hardware-supervised mode).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) * Returns -EINVAL if passed null pointers; -ERANGE if the @clkdm usecount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) * underflows; or returns 0 upon success or if the clockdomain is in hwsup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) * idle mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) /* The clkdm attribute does not exist yet prior OMAP4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) if (cpu_is_omap24xx() || cpu_is_omap34xx())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) if (!oh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) return clkdm_clk_disable(clkdm, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) * _clkdm_save_context - save the context for the control of this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) * Due to a suspend or hibernation operation, the state of the registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) * controlling this clkdm will be lost, save their context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) static int _clkdm_save_context(struct clockdomain *clkdm, void *ununsed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (!arch_clkdm || !arch_clkdm->clkdm_save_context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) return arch_clkdm->clkdm_save_context(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) * _clkdm_restore_context - restore context for control of this clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) * Restore the register values for this clockdomain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) static int _clkdm_restore_context(struct clockdomain *clkdm, void *ununsed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) if (!arch_clkdm || !arch_clkdm->clkdm_restore_context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) return arch_clkdm->clkdm_restore_context(clkdm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) * clkdm_save_context - Saves the context for each registered clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) * Save the context for each registered clockdomain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) void clkdm_save_context(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) clkdm_for_each(_clkdm_save_context, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) * clkdm_restore_context - Restores the context for each registered clkdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) * Restore the context for each registered clockdomain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) void clkdm_restore_context(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) clkdm_for_each(_clkdm_restore_context, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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