1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2015 Google, Inc
3*4882a593Smuzhiyun * Written by Simon Glass <sjg@chromium.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <dm.h>
10*4882a593Smuzhiyun #include <errno.h>
11*4882a593Smuzhiyun #include <led.h>
12*4882a593Smuzhiyun #include <dm/root.h>
13*4882a593Smuzhiyun #include <dm/uclass-internal.h>
14*4882a593Smuzhiyun
led_get_by_label(const char * label,struct udevice ** devp)15*4882a593Smuzhiyun int led_get_by_label(const char *label, struct udevice **devp)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun struct udevice *dev;
18*4882a593Smuzhiyun struct uclass *uc;
19*4882a593Smuzhiyun int ret;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun ret = uclass_get(UCLASS_LED, &uc);
22*4882a593Smuzhiyun if (ret)
23*4882a593Smuzhiyun return ret;
24*4882a593Smuzhiyun uclass_foreach_dev(dev, uc) {
25*4882a593Smuzhiyun struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun /* Ignore the top-level LED node */
28*4882a593Smuzhiyun if (uc_plat->label && !strcmp(label, uc_plat->label))
29*4882a593Smuzhiyun return uclass_get_device_tail(dev, 0, devp);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return -ENODEV;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
led_set_state(struct udevice * dev,enum led_state_t state)35*4882a593Smuzhiyun int led_set_state(struct udevice *dev, enum led_state_t state)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun struct led_ops *ops = led_get_ops(dev);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun if (!ops->set_state)
40*4882a593Smuzhiyun return -ENOSYS;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return ops->set_state(dev, state);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
led_get_state(struct udevice * dev)45*4882a593Smuzhiyun enum led_state_t led_get_state(struct udevice *dev)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun struct led_ops *ops = led_get_ops(dev);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (!ops->get_state)
50*4882a593Smuzhiyun return -ENOSYS;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun return ops->get_state(dev);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun #ifdef CONFIG_LED_BLINK
led_set_period(struct udevice * dev,int period_ms)56*4882a593Smuzhiyun int led_set_period(struct udevice *dev, int period_ms)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct led_ops *ops = led_get_ops(dev);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun if (!ops->set_period)
61*4882a593Smuzhiyun return -ENOSYS;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun return ops->set_period(dev, period_ms);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun #endif
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun UCLASS_DRIVER(led) = {
68*4882a593Smuzhiyun .id = UCLASS_LED,
69*4882a593Smuzhiyun .name = "led",
70*4882a593Smuzhiyun .per_device_platdata_auto_alloc_size = sizeof(struct led_uc_plat),
71*4882a593Smuzhiyun };
72