1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
16 struct led_gpio_priv {
17 struct gpio_desc gpio;
20 static int gpio_led_set_state(struct udevice *dev, enum led_state_t state)
22 struct led_gpio_priv *priv = dev_get_priv(dev);
25 if (!dm_gpio_is_valid(&priv->gpio))
32 ret = dm_gpio_get_value(&priv->gpio);
41 return dm_gpio_set_value(&priv->gpio, state);
44 static enum led_state_t gpio_led_get_state(struct udevice *dev)
46 struct led_gpio_priv *priv = dev_get_priv(dev);
49 if (!dm_gpio_is_valid(&priv->gpio))
51 ret = dm_gpio_get_value(&priv->gpio);
55 return ret ? LEDST_ON : LEDST_OFF;
58 static int led_gpio_probe(struct udevice *dev)
60 struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
61 struct led_gpio_priv *priv = dev_get_priv(dev);
64 /* Ignore the top-level LED node */
68 ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
75 static int led_gpio_remove(struct udevice *dev)
78 * The GPIO driver may have already been removed. We will need to
79 * address this more generally.
81 #ifndef CONFIG_SANDBOX
82 struct led_gpio_priv *priv = dev_get_priv(dev);
84 if (dm_gpio_is_valid(&priv->gpio))
85 dm_gpio_free(dev, &priv->gpio);
91 static int led_gpio_bind(struct udevice *parent)
97 dev_for_each_subnode(node, parent) {
98 struct led_uc_plat *uc_plat;
101 label = ofnode_read_string(node, "label");
103 label = ofnode_get_name(node);
104 ret = device_bind_driver_to_node(parent, "gpio_led",
105 ofnode_get_name(node),
109 uc_plat = dev_get_uclass_platdata(dev);
110 uc_plat->label = label;
116 static const struct led_ops gpio_led_ops = {
117 .set_state = gpio_led_set_state,
118 .get_state = gpio_led_get_state,
121 static const struct udevice_id led_gpio_ids[] = {
122 { .compatible = "gpio-leds" },
126 U_BOOT_DRIVER(led_gpio) = {
129 .of_match = led_gpio_ids,
130 .ops = &gpio_led_ops,
131 .priv_auto = sizeof(struct led_gpio_priv),
132 .bind = led_gpio_bind,
133 .probe = led_gpio_probe,
134 .remove = led_gpio_remove,