1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
7 #define LOG_CATEGORY UCLASS_LED
13 #include <dm/device-internal.h>
15 #include <dm/uclass-internal.h>
17 int led_get_by_label(const char *label, struct udevice **devp)
23 ret = uclass_get(UCLASS_LED, &uc);
26 uclass_foreach_dev(dev, uc) {
27 struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
29 /* Ignore the top-level LED node */
30 if (uc_plat->label && !strcmp(label, uc_plat->label))
31 return uclass_get_device_tail(dev, 0, devp);
37 int led_set_state(struct udevice *dev, enum led_state_t state)
39 struct led_ops *ops = led_get_ops(dev);
44 return ops->set_state(dev, state);
47 enum led_state_t led_get_state(struct udevice *dev)
49 struct led_ops *ops = led_get_ops(dev);
54 return ops->get_state(dev);
57 #ifdef CONFIG_LED_BLINK
58 int led_set_period(struct udevice *dev, int period_ms)
60 struct led_ops *ops = led_get_ops(dev);
65 return ops->set_period(dev, period_ms);
69 int led_default_state(void)
73 const char *default_state;
76 ret = uclass_get(UCLASS_LED, &uc);
79 for (uclass_find_first_device(UCLASS_LED, &dev);
81 uclass_find_next_device(&dev)) {
82 default_state = dev_read_string(dev, "default-state");
85 ret = device_probe(dev);
88 if (!strncmp(default_state, "on", 2))
89 led_set_state(dev, LEDST_ON);
90 else if (!strncmp(default_state, "off", 3))
91 led_set_state(dev, LEDST_OFF);
92 /* default-state = "keep" : device is only probed */
98 static int led_post_bind(struct udevice *dev)
100 struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
102 uc_plat->label = dev_read_string(dev, "label");
104 uc_plat->label = ofnode_get_name(dev_ofnode(dev));
109 UCLASS_DRIVER(led) = {
112 .per_device_plat_auto = sizeof(struct led_uc_plat),
113 .post_bind = led_post_bind,