^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) * One-shot LED Trigger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2012, Fabio Baltieri <fabio.baltieri@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Based on ledtrig-timer.c by 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) #include "../leds.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DEFAULT_DELAY 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct oneshot_trig_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) unsigned int invert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static ssize_t led_shot(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) led_blink_set_oneshot(led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) &led_cdev->blink_delay_on, &led_cdev->blink_delay_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) oneshot_data->invert);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* content is ignored */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static ssize_t led_invert_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return sprintf(buf, "%u\n", oneshot_data->invert);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static ssize_t led_invert_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ret = kstrtoul(buf, 0, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) oneshot_data->invert = !!state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (oneshot_data->invert)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) led_set_brightness_nosleep(led_cdev, LED_FULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) led_set_brightness_nosleep(led_cdev, LED_OFF);
^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 ssize_t led_delay_on_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static ssize_t led_delay_on_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) ret = kstrtoul(buf, 0, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) led_cdev->blink_delay_on = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static ssize_t led_delay_off_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static ssize_t led_delay_off_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct device_attribute *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct led_classdev *led_cdev = led_trigger_get_led(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ret = kstrtoul(buf, 0, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) led_cdev->blink_delay_off = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static DEVICE_ATTR(shot, 0200, NULL, led_shot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static struct attribute *oneshot_trig_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) &dev_attr_delay_on.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) &dev_attr_delay_off.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) &dev_attr_invert.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) &dev_attr_shot.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ATTRIBUTE_GROUPS(oneshot_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static void pattern_init(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) u32 *pattern;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned int size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) pattern = led_get_default_pattern(led_cdev, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (!pattern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) goto out_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (size != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev_warn(led_cdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) "Expected 2 but got %u values for delays pattern\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) goto out_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) led_cdev->blink_delay_on = pattern[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) led_cdev->blink_delay_off = pattern[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) kfree(pattern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) out_default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) kfree(pattern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) led_cdev->blink_delay_on = DEFAULT_DELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) led_cdev->blink_delay_off = DEFAULT_DELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int oneshot_trig_activate(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct oneshot_trig_data *oneshot_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) oneshot_data = kzalloc(sizeof(*oneshot_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!oneshot_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) led_set_trigger_data(led_cdev, oneshot_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pattern_init(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * Mark as initialized even on pattern_init() error because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * any consecutive call to it would produce the same error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static void oneshot_trig_deactivate(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct oneshot_trig_data *oneshot_data = led_get_trigger_data(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) kfree(oneshot_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* Stop blinking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) led_set_brightness(led_cdev, LED_OFF);
^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) static struct led_trigger oneshot_led_trigger = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .name = "oneshot",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .activate = oneshot_trig_activate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .deactivate = oneshot_trig_deactivate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .groups = oneshot_trig_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) module_led_trigger(oneshot_led_trigger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) MODULE_AUTHOR("Fabio Baltieri <fabio.baltieri@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) MODULE_DESCRIPTION("One-shot LED trigger");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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