// SPDX-License-Identifier: GPL-2.0-only/* * LED Kernel Timer Trigger * * Copyright 2005-2006 Openedhand Ltd. * * Author: Richard Purdie <rpurdie@openedhand.com> */ #include <linux/module.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/device.h>#include <linux/ctype.h>#include <linux/slab.h>#include <linux/leds.h> 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;	} 	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 <rpurdie@openedhand.com>");MODULE_DESCRIPTION("Timer LED trigger");MODULE_LICENSE("GPL v2");