^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) * AB8500 system control driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) ST-Ericsson SA 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/abx500.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/abx500/ab8500.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/abx500/ab8500-sysctrl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* RtcCtrl bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define AB8500_ALARM_MIN_LOW 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define AB8500_ALARM_MIN_MID 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define RTC_CTRL 0x0B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define RTC_ALARM_ENABLE 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static struct device *sysctrl_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static void ab8500_power_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) sigset_t old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) sigset_t all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static const char * const pss[] = {"ab8500_ac", "pm2301", "ab8500_usb"};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) bool charger_present = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) union power_supply_propval val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct power_supply *psy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (sysctrl_dev == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) pr_err("%s: sysctrl not initialized\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * If we have a charger connected and we're powering off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * reboot into charge-only mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) for (i = 0; i < ARRAY_SIZE(pss); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) psy = power_supply_get_by_name(pss[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!psy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) power_supply_put(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (!ret && val.intval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) charger_present = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^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) if (!charger_present)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) goto shutdown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* Check if battery is known */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) psy = power_supply_get_by_name("ab8500_btemp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (psy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = power_supply_get_property(psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) POWER_SUPPLY_PROP_TECHNOLOGY, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) pr_info("Charger '%s' is connected with known battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) pss[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pr_info(" - Rebooting.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) machine_restart("charging");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) power_supply_put(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) shutdown:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) sigfillset(&all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (!sigprocmask(SIG_BLOCK, &all, &old)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) AB8500_STW4500CTRL1_SWOFF |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) AB8500_STW4500CTRL1_SWRESET4500N);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) (void)sigprocmask(SIG_SETMASK, &old, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static inline bool valid_bank(u8 bank)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) (bank == AB8500_SYS_CTRL2_BLOCK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int ab8500_sysctrl_read(u16 reg, u8 *value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) u8 bank;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (sysctrl_dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) bank = (reg >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!valid_bank(bank))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return abx500_get_register_interruptible(sysctrl_dev, bank,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) (u8)(reg & 0xFF), value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) EXPORT_SYMBOL(ab8500_sysctrl_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) u8 bank;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (sysctrl_dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) bank = (reg >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!valid_bank(bank)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pr_err("invalid bank\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) (u8)(reg & 0xFF), mask, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) EXPORT_SYMBOL(ab8500_sysctrl_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int ab8500_sysctrl_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) sysctrl_dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!pm_power_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) pm_power_off = ab8500_power_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static int ab8500_sysctrl_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) sysctrl_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (pm_power_off == ab8500_power_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) pm_power_off = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static const struct of_device_id ab8500_sysctrl_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) { .compatible = "stericsson,ab8500-sysctrl", },
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static struct platform_driver ab8500_sysctrl_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .name = "ab8500-sysctrl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) .of_match_table = ab8500_sysctrl_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .probe = ab8500_sysctrl_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .remove = ab8500_sysctrl_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int __init ab8500_sysctrl_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return platform_driver_register(&ab8500_sysctrl_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) arch_initcall(ab8500_sysctrl_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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