^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 Kernel Timer Trigger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2005-2006 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/module.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/init.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/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static ssize_t led_delay_on_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static ssize_t led_delay_on_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) ret = kstrtoul(buf, 10, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) led_cdev->blink_delay_on = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static ssize_t led_delay_off_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static ssize_t led_delay_off_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ret = kstrtoul(buf, 10, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) led_cdev->blink_delay_off = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return size;
^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) static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static struct attribute *timer_trig_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) &dev_attr_delay_on.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) &dev_attr_delay_off.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ATTRIBUTE_GROUPS(timer_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void pattern_init(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) u32 *pattern;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned int size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) pattern = led_get_default_pattern(led_cdev, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (!pattern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (size != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_warn(led_cdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) "Expected 2 but got %u values for delays pattern\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) goto out;
^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) led_cdev->blink_delay_on = pattern[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) led_cdev->blink_delay_off = pattern[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* led_blink_set() called by caller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) kfree(pattern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int timer_trig_activate(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) pattern_init(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Mark as initialized even on pattern_init() error because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * any consecutive call to it would produce the same error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^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) * If "set brightness to 0" is pending in workqueue, we don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * want that to be reordered after blink_set()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) flush_work(&led_cdev->set_brightness_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) led_blink_set(led_cdev, &led_cdev->blink_delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) &led_cdev->blink_delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void timer_trig_deactivate(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* Stop blinking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) led_set_brightness(led_cdev, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static struct led_trigger timer_led_trigger = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .name = "timer",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .activate = timer_trig_activate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .deactivate = timer_trig_deactivate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .groups = timer_trig_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) module_led_trigger(timer_led_trigger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) MODULE_DESCRIPTION("Timer LED trigger");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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