^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) * Link physical devices with ACPI devices support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2005 Intel Corp.
^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/acpi_iort.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define ACPI_GLUE_DEBUG 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #if ACPI_GLUE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DBG(fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define DBG(fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (0) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static LIST_HEAD(bus_type_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static DECLARE_RWSEM(bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define PHYSICAL_NODE_STRING "physical_node"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int register_acpi_bus_type(struct acpi_bus_type *type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (acpi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (type && type->match && type->find_companion) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) down_write(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) list_add_tail(&type->list, &bus_type_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) up_write(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) EXPORT_SYMBOL_GPL(register_acpi_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int unregister_acpi_bus_type(struct acpi_bus_type *type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (acpi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) down_write(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) list_del_init(&type->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) up_write(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) printk(KERN_INFO PREFIX "bus type %s unregistered\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) type->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct acpi_bus_type *tmp, *ret = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) down_read(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) list_for_each_entry(tmp, &bus_type_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (tmp->match(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) up_read(&bus_type_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define FIND_CHILD_MIN_SCORE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define FIND_CHILD_MAX_SCORE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int find_child_checks(struct acpi_device *adev, bool check_children)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) bool sta_present = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned long long sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (status == AE_NOT_FOUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) sta_present = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) else if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (check_children && list_empty(&adev->children))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * If the device has a _HID returning a valid ACPI/PNP device ID, it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * better to make it look less attractive here, so that the other device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * with the same _ADR value (that may not have a valid device ID) can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * matched going forward. [This means a second spec violation in a row,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * so whatever we do here is best effort anyway.]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return sta_present && !adev->pnp.type.platform_id ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u64 address, bool check_children)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct acpi_device *adev, *ret = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int ret_score = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) list_for_each_entry(adev, &parent->children, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) unsigned long long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int score;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) NULL, &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (ACPI_FAILURE(status) || addr != address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* This is the first matching object. Save it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ret = adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * There is more than one matching device object with the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * _ADR value. That really is unexpected, so we are kind of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * beyond the scope of the spec here. We have to choose which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * one to return, though.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * First, check if the previously found object is good enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * and return it if so. Second, do the same for the object that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * we've just found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!ret_score) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ret_score = find_child_checks(ret, check_children);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (ret_score == FIND_CHILD_MAX_SCORE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) score = find_child_checks(adev, check_children);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (score == FIND_CHILD_MAX_SCORE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) } else if (score > ret_score) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ret_score = score;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL_GPL(acpi_find_child_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void acpi_physnode_link_name(char *buf, unsigned int node_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (node_id > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) PHYSICAL_NODE_STRING "%u", node_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) strcpy(buf, PHYSICAL_NODE_STRING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct acpi_device_physical_node *physical_node, *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct list_head *physnode_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) unsigned int node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int retval = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (has_acpi_companion(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (acpi_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) dev_warn(dev, "ACPI companion already set\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) acpi_dev = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (!acpi_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) get_device(&acpi_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) get_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (!physical_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) mutex_lock(&acpi_dev->physical_node_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * Keep the list sorted by node_id so that the IDs of removed nodes can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * be recycled easily.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) physnode_list = &acpi_dev->physical_node_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) node_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /* Sanity check. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (pn->dev == dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) mutex_unlock(&acpi_dev->physical_node_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) dev_warn(dev, "Already associated with ACPI node\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) kfree(physical_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (ACPI_COMPANION(dev) != acpi_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) put_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) put_device(&acpi_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (pn->node_id == node_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) physnode_list = &pn->node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) node_id++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) physical_node->node_id = node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) physical_node->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) list_add(&physical_node->node, physnode_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) acpi_dev->physical_node_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!has_acpi_companion(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ACPI_COMPANION_SET(dev, acpi_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) acpi_physnode_link_name(physical_node_name, node_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) physical_node_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) physical_node_name, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) "firmware_node");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) dev_err(dev, "Failed to create link firmware_node (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) mutex_unlock(&acpi_dev->physical_node_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (acpi_dev->wakeup.flags.valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) device_set_wakeup_capable(dev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ACPI_COMPANION_SET(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) put_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) put_device(&acpi_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) EXPORT_SYMBOL_GPL(acpi_bind_one);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int acpi_unbind_one(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct acpi_device_physical_node *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (!acpi_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) mutex_lock(&acpi_dev->physical_node_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (entry->dev == dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) char physnode_name[PHYSICAL_NODE_NAME_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) list_del(&entry->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) acpi_dev->physical_node_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) acpi_physnode_link_name(physnode_name, entry->node_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) sysfs_remove_link(&dev->kobj, "firmware_node");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) ACPI_COMPANION_SET(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* Drop references taken by acpi_bind_one(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) put_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) put_device(&acpi_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) kfree(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) mutex_unlock(&acpi_dev->physical_node_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) EXPORT_SYMBOL_GPL(acpi_unbind_one);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static int acpi_device_notify(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct acpi_bus_type *type = acpi_get_bus_type(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct acpi_device *adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) ret = acpi_bind_one(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (ret && type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct acpi_device *adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) adev = type->find_companion(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (!adev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) DBG("Unable to get handle for %s\n", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) ret = acpi_bind_one(dev, adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) adev = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (!adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (dev_is_platform(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) acpi_configure_pmsi_domain(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (type && type->setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) type->setup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) else if (adev->handler && adev->handler->bind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) adev->handler->bind(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) #if ACPI_GLUE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) kfree(buffer.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) DBG("Device %s -> No ACPI support\n", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static int acpi_device_notify_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) struct acpi_device *adev = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct acpi_bus_type *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (!adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) type = acpi_get_bus_type(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (type && type->cleanup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) type->cleanup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) else if (adev->handler && adev->handler->unbind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) adev->handler->unbind(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) acpi_unbind_one(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) int acpi_platform_notify(struct device *dev, enum kobject_action action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) switch (action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) case KOBJ_ADD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) acpi_device_notify(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) case KOBJ_REMOVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) acpi_device_notify_remove(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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