]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/led/led_gpio.c
2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
15 DECLARE_GLOBAL_DATA_PTR
;
17 struct led_gpio_priv
{
18 struct gpio_desc gpio
;
21 static int gpio_led_set_on(struct udevice
*dev
, int on
)
23 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
25 if (!dm_gpio_is_valid(&priv
->gpio
))
28 return dm_gpio_set_value(&priv
->gpio
, on
);
31 static int led_gpio_probe(struct udevice
*dev
)
33 struct led_uclass_plat
*uc_plat
= dev_get_uclass_platdata(dev
);
34 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
36 /* Ignore the top-level LED node */
39 return gpio_request_by_name(dev
, "gpios", 0, &priv
->gpio
, GPIOD_IS_OUT
);
42 static int led_gpio_remove(struct udevice
*dev
)
45 * The GPIO driver may have already been removed. We will need to
46 * address this more generally.
48 #ifndef CONFIG_SANDBOX
49 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
51 if (dm_gpio_is_valid(&priv
->gpio
))
52 dm_gpio_free(dev
, &priv
->gpio
);
58 static int led_gpio_bind(struct udevice
*parent
)
60 const void *blob
= gd
->fdt_blob
;
65 for (node
= fdt_first_subnode(blob
, parent
->of_offset
);
67 node
= fdt_next_subnode(blob
, node
)) {
68 struct led_uclass_plat
*uc_plat
;
71 label
= fdt_getprop(blob
, node
, "label", NULL
);
73 debug("%s: node %s has no label\n", __func__
,
74 fdt_get_name(blob
, node
, NULL
));
77 ret
= device_bind_driver_to_node(parent
, "gpio_led",
78 fdt_get_name(blob
, node
, NULL
),
82 uc_plat
= dev_get_uclass_platdata(dev
);
83 uc_plat
->label
= label
;
89 static const struct led_ops gpio_led_ops
= {
90 .set_on
= gpio_led_set_on
,
93 static const struct udevice_id led_gpio_ids
[] = {
94 { .compatible
= "gpio-leds" },
98 U_BOOT_DRIVER(led_gpio
) = {
101 .of_match
= led_gpio_ids
,
102 .ops
= &gpio_led_ops
,
103 .priv_auto_alloc_size
= sizeof(struct led_gpio_priv
),
104 .bind
= led_gpio_bind
,
105 .probe
= led_gpio_probe
,
106 .remove
= led_gpio_remove
,