2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
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);
62 /* Ignore the top-level LED node */
65 return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
68 static int led_gpio_remove(struct udevice *dev)
71 * The GPIO driver may have already been removed. We will need to
72 * address this more generally.
74 #ifndef CONFIG_SANDBOX
75 struct led_gpio_priv *priv = dev_get_priv(dev);
77 if (dm_gpio_is_valid(&priv->gpio))
78 dm_gpio_free(dev, &priv->gpio);
84 static int led_gpio_bind(struct udevice *parent)
90 dev_for_each_subnode(node, parent) {
91 struct led_uc_plat *uc_plat;
94 label = ofnode_read_string(node, "label");
96 debug("%s: node %s has no label\n", __func__,
97 ofnode_get_name(node));
100 ret = device_bind_driver_to_node(parent, "gpio_led",
101 ofnode_get_name(node),
105 uc_plat = dev_get_uclass_platdata(dev);
106 uc_plat->label = label;
112 static const struct led_ops gpio_led_ops = {
113 .set_state = gpio_led_set_state,
114 .get_state = gpio_led_get_state,
117 static const struct udevice_id led_gpio_ids[] = {
118 { .compatible = "gpio-leds" },
122 U_BOOT_DRIVER(led_gpio) = {
125 .of_match = led_gpio_ids,
126 .ops = &gpio_led_ops,
127 .priv_auto_alloc_size = sizeof(struct led_gpio_priv),
128 .bind = led_gpio_bind,
129 .probe = led_gpio_probe,
130 .remove = led_gpio_remove,