From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/leds/trigger/ledtrig-timer.c | 140 +++++++++++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) create mode 100644 drivers/leds/trigger/ledtrig-timer.c (limited to 'drivers/leds/trigger/ledtrig-timer.c') diff --git a/drivers/leds/trigger/ledtrig-timer.c b/drivers/leds/trigger/ledtrig-timer.c new file mode 100644 index 000000000..b4688d1d9 --- /dev/null +++ b/drivers/leds/trigger/ledtrig-timer.c @@ -0,0 +1,140 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * LED Kernel Timer Trigger + * + * Copyright 2005-2006 Openedhand Ltd. + * + * Author: Richard Purdie + */ + +#include +#include +#include +#include +#include +#include +#include + +static ssize_t led_delay_on_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_classdev *led_cdev = led_trigger_get_led(dev); + + return sprintf(buf, "%lu\n", led_cdev->blink_delay_on); +} + +static ssize_t led_delay_on_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct led_classdev *led_cdev = led_trigger_get_led(dev); + unsigned long state; + ssize_t ret; + + ret = kstrtoul(buf, 10, &state); + if (ret) + return ret; + + led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off); + led_cdev->blink_delay_on = state; + + return size; +} + +static ssize_t led_delay_off_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_classdev *led_cdev = led_trigger_get_led(dev); + + return sprintf(buf, "%lu\n", led_cdev->blink_delay_off); +} + +static ssize_t led_delay_off_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct led_classdev *led_cdev = led_trigger_get_led(dev); + unsigned long state; + ssize_t ret; + + ret = kstrtoul(buf, 10, &state); + if (ret) + return ret; + + led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state); + led_cdev->blink_delay_off = state; + + return size; +} + +static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store); +static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store); + +static struct attribute *timer_trig_attrs[] = { + &dev_attr_delay_on.attr, + &dev_attr_delay_off.attr, + NULL +}; +ATTRIBUTE_GROUPS(timer_trig); + +static void pattern_init(struct led_classdev *led_cdev) +{ + u32 *pattern; + unsigned int size = 0; + + pattern = led_get_default_pattern(led_cdev, &size); + if (!pattern) + return; + + if (size != 2) { + dev_warn(led_cdev->dev, + "Expected 2 but got %u values for delays pattern\n", + size); + goto out; + } + + led_cdev->blink_delay_on = pattern[0]; + led_cdev->blink_delay_off = pattern[1]; + /* led_blink_set() called by caller */ + +out: + kfree(pattern); +} + +static int timer_trig_activate(struct led_classdev *led_cdev) +{ + if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) { + pattern_init(led_cdev); + /* + * Mark as initialized even on pattern_init() error because + * any consecutive call to it would produce the same error. + */ + led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER; + } + + /* + * If "set brightness to 0" is pending in workqueue, we don't + * want that to be reordered after blink_set() + */ + flush_work(&led_cdev->set_brightness_work); + led_blink_set(led_cdev, &led_cdev->blink_delay_on, + &led_cdev->blink_delay_off); + + return 0; +} + +static void timer_trig_deactivate(struct led_classdev *led_cdev) +{ + /* Stop blinking */ + led_set_brightness(led_cdev, LED_OFF); +} + +static struct led_trigger timer_led_trigger = { + .name = "timer", + .activate = timer_trig_activate, + .deactivate = timer_trig_deactivate, + .groups = timer_trig_groups, +}; +module_led_trigger(timer_led_trigger); + +MODULE_AUTHOR("Richard Purdie "); +MODULE_DESCRIPTION("Timer LED trigger"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3