^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) * LED Triggers Core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2005-2007 Openedhand Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Richard Purdie <rpurdie@openedhand.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^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/kernel.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/spinlock.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/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "leds.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Nests outside led_cdev->trigger_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static DECLARE_RWSEM(triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) LIST_HEAD(trigger_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /* Used by LED Class */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static inline bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) trigger_relevant(struct led_classdev *led_cdev, struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return !trig->trigger_type || trig->trigger_type == led_cdev->trigger_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ssize_t led_trigger_write(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct bin_attribute *bin_attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) loff_t pos, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct device *dev = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct led_trigger *trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int ret = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) mutex_lock(&led_cdev->led_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (led_sysfs_is_disabled(led_cdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (sysfs_streq(buf, "none")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) led_trigger_remove(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) down_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) list_for_each_entry(trig, &trigger_list, next_trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (sysfs_streq(buf, trig->name) && trigger_relevant(led_cdev, trig)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) down_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) led_trigger_set(led_cdev, trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) up_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) up_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* we come here only if buf matches no trigger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) up_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mutex_unlock(&led_cdev->led_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) EXPORT_SYMBOL_GPL(led_trigger_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) __printf(3, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int led_trigger_snprintf(char *buf, ssize_t size, const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (size <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) i = vsnprintf(NULL, 0, fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) i = vscnprintf(buf, size, fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int led_trigger_format(char *buf, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct led_trigger *trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int len = led_trigger_snprintf(buf, size, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) led_cdev->trigger ? "none" : "[none]");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) list_for_each_entry(trig, &trigger_list, next_trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) bool hit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!trigger_relevant(led_cdev, trig))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) hit = led_cdev->trigger && !strcmp(led_cdev->trigger->name, trig->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) len += led_trigger_snprintf(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) " %s%s%s", hit ? "[" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) trig->name, hit ? "]" : "");
^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) len += led_trigger_snprintf(buf + len, size - len, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * It was stupid to create 10000 cpu triggers, but we are stuck with it now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * Don't make that mistake again. We work around it here by creating binary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * attribute, which is not limited by length. This is _not_ good design, do not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * copy it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) ssize_t led_trigger_read(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct bin_attribute *attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) loff_t pos, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct device *dev = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) down_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) down_read(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) len = led_trigger_format(NULL, 0, led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) data = kvmalloc(len + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) up_read(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) up_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) len = led_trigger_format(data, len + 1, led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) up_read(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) up_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) len = memory_read_from_buffer(buf, count, &pos, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) kvfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) EXPORT_SYMBOL_GPL(led_trigger_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Caller must ensure led_cdev->trigger_lock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) char *event = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) char *envp[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!led_cdev->trigger && !trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) name = trig ? trig->name : "none";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* Remove any existing trigger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (led_cdev->trigger) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) list_del(&led_cdev->trig_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) cancel_work_sync(&led_cdev->set_brightness_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) led_stop_software_blink(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (led_cdev->trigger->deactivate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) led_cdev->trigger->deactivate(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) device_remove_groups(led_cdev->dev, led_cdev->trigger->groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) led_cdev->trigger = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) led_cdev->trigger_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) led_cdev->activated = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) led_set_brightness(led_cdev, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) write_lock_irqsave(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) write_unlock_irqrestore(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) led_cdev->trigger = trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (trig->activate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) ret = trig->activate(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) goto err_activate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) ret = device_add_groups(led_cdev->dev, trig->groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) dev_err(led_cdev->dev, "Failed to add trigger attributes\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto err_add_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) envp[0] = event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) envp[1] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) dev_err(led_cdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) "%s: Error sending uevent\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) kfree(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) err_add_groups:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (trig->deactivate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) trig->deactivate(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) err_activate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) list_del(&led_cdev->trig_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) led_cdev->trigger = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) led_cdev->trigger_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) led_set_brightness(led_cdev, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) kfree(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) EXPORT_SYMBOL_GPL(led_trigger_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void led_trigger_remove(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) down_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) led_trigger_set(led_cdev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) up_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) EXPORT_SYMBOL_GPL(led_trigger_remove);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void led_trigger_set_default(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct led_trigger *trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (!led_cdev->default_trigger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) down_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) down_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) list_for_each_entry(trig, &trigger_list, next_trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (!strcmp(led_cdev->default_trigger, trig->name) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) trigger_relevant(led_cdev, trig)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) led_trigger_set(led_cdev, trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) up_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) up_read(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) EXPORT_SYMBOL_GPL(led_trigger_set_default);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) void led_trigger_rename_static(const char *name, struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /* new name must be on a temporary string to prevent races */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) BUG_ON(name == trig->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) down_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* this assumes that trig->name was originaly allocated to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * non constant storage */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) strcpy((char *)trig->name, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) up_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) EXPORT_SYMBOL_GPL(led_trigger_rename_static);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* LED Trigger Interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int led_trigger_register(struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct led_classdev *led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct led_trigger *_trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) rwlock_init(&trig->leddev_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) INIT_LIST_HEAD(&trig->led_cdevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) down_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /* Make sure the trigger's name isn't already in use */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) list_for_each_entry(_trig, &trigger_list, next_trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!strcmp(_trig->name, trig->name) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) (trig->trigger_type == _trig->trigger_type ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) !trig->trigger_type || !_trig->trigger_type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) up_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* Add to the list of led triggers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) list_add_tail(&trig->next_trig, &trigger_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) up_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* Register with any LEDs that have this as a default trigger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) down_read(&leds_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) list_for_each_entry(led_cdev, &leds_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) down_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (!led_cdev->trigger && led_cdev->default_trigger &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) !strcmp(led_cdev->default_trigger, trig->name) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) trigger_relevant(led_cdev, trig)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) led_trigger_set(led_cdev, trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) up_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) up_read(&leds_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) EXPORT_SYMBOL_GPL(led_trigger_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) void led_trigger_unregister(struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct led_classdev *led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (list_empty_careful(&trig->next_trig))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Remove from the list of led triggers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) down_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) list_del_init(&trig->next_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) up_write(&triggers_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* Remove anyone actively using this trigger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) down_read(&leds_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) list_for_each_entry(led_cdev, &leds_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) down_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (led_cdev->trigger == trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) led_trigger_set(led_cdev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) up_write(&led_cdev->trigger_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) up_read(&leds_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) EXPORT_SYMBOL_GPL(led_trigger_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) static void devm_led_trigger_release(struct device *dev, void *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) led_trigger_unregister(*(struct led_trigger **)res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) int devm_led_trigger_register(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct led_trigger **dr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (!dr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *dr = trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) rc = led_trigger_register(trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) devres_free(dr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) devres_add(dev, dr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) EXPORT_SYMBOL_GPL(devm_led_trigger_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) /* Simple LED Trigger Interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) void led_trigger_event(struct led_trigger *trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct led_classdev *led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (!trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) read_lock_irqsave(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) led_set_brightness(led_cdev, brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) read_unlock_irqrestore(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) EXPORT_SYMBOL_GPL(led_trigger_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static void led_trigger_blink_setup(struct led_trigger *trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) unsigned long *delay_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int oneshot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) int invert)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct led_classdev *led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (!trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) read_lock_irqsave(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (oneshot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) led_blink_set_oneshot(led_cdev, delay_on, delay_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) invert);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) led_blink_set(led_cdev, delay_on, delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) read_unlock_irqrestore(&trig->leddev_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) void led_trigger_blink(struct led_trigger *trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) EXPORT_SYMBOL_GPL(led_trigger_blink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) void led_trigger_blink_oneshot(struct led_trigger *trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) unsigned long *delay_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) int invert)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) void led_trigger_register_simple(const char *name, struct led_trigger **tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct led_trigger *trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) trig->name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) err = led_trigger_register(trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) kfree(trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) trig = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) pr_warn("LED trigger %s failed to register (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) name, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) pr_warn("LED trigger %s failed to register (no memory)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) *tp = trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) EXPORT_SYMBOL_GPL(led_trigger_register_simple);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) void led_trigger_unregister_simple(struct led_trigger *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) led_trigger_unregister(trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) kfree(trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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