1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
13 #include <dm/uclass-internal.h>
15 struct led_gpio_priv {
16 struct gpio_desc gpio;
19 static int gpio_led_set_state(struct udevice *dev, enum led_state_t state)
21 struct led_gpio_priv *priv = dev_get_priv(dev);
24 if (!dm_gpio_is_valid(&priv->gpio))
31 ret = dm_gpio_get_value(&priv->gpio);
40 return dm_gpio_set_value(&priv->gpio, state);
43 static enum led_state_t gpio_led_get_state(struct udevice *dev)
45 struct led_gpio_priv *priv = dev_get_priv(dev);
48 if (!dm_gpio_is_valid(&priv->gpio))
50 ret = dm_gpio_get_value(&priv->gpio);
54 return ret ? LEDST_ON : LEDST_OFF;
57 static int led_gpio_probe(struct udevice *dev)
59 struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
60 struct led_gpio_priv *priv = dev_get_priv(dev);
61 const char *default_state;
64 /* Ignore the top-level LED node */
68 ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
72 default_state = dev_read_string(dev, "default-state");
74 if (!strncmp(default_state, "on", 2))
75 gpio_led_set_state(dev, LEDST_ON);
76 else if (!strncmp(default_state, "off", 3))
77 gpio_led_set_state(dev, LEDST_OFF);
82 static int led_gpio_remove(struct udevice *dev)
85 * The GPIO driver may have already been removed. We will need to
86 * address this more generally.
88 #ifndef CONFIG_SANDBOX
89 struct led_gpio_priv *priv = dev_get_priv(dev);
91 if (dm_gpio_is_valid(&priv->gpio))
92 dm_gpio_free(dev, &priv->gpio);
98 static int led_gpio_bind(struct udevice *parent)
104 dev_for_each_subnode(node, parent) {
105 struct led_uc_plat *uc_plat;
108 label = ofnode_read_string(node, "label");
110 debug("%s: node %s has no label\n", __func__,
111 ofnode_get_name(node));
114 ret = device_bind_driver_to_node(parent, "gpio_led",
115 ofnode_get_name(node),
119 uc_plat = dev_get_uclass_platdata(dev);
120 uc_plat->label = label;
122 if (ofnode_read_bool(node, "default-state")) {
123 struct udevice *devp;
125 ret = uclass_get_device_tail(dev, 0, &devp);
134 static const struct led_ops gpio_led_ops = {
135 .set_state = gpio_led_set_state,
136 .get_state = gpio_led_get_state,
139 static const struct udevice_id led_gpio_ids[] = {
140 { .compatible = "gpio-leds" },
144 U_BOOT_DRIVER(led_gpio) = {
147 .of_match = led_gpio_ids,
148 .ops = &gpio_led_ops,
149 .priv_auto_alloc_size = sizeof(struct led_gpio_priv),
150 .bind = led_gpio_bind,
151 .probe = led_gpio_probe,
152 .remove = led_gpio_remove,