]>
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_state(struct udevice
*dev
, enum led_state_t state
)
23 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
26 if (!dm_gpio_is_valid(&priv
->gpio
))
33 ret
= dm_gpio_get_value(&priv
->gpio
);
42 return dm_gpio_set_value(&priv
->gpio
, state
);
45 static enum led_state_t
gpio_led_get_state(struct udevice
*dev
)
47 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
50 if (!dm_gpio_is_valid(&priv
->gpio
))
52 ret
= dm_gpio_get_value(&priv
->gpio
);
56 return ret
? LEDST_ON
: LEDST_OFF
;
59 static int led_gpio_probe(struct udevice
*dev
)
61 struct led_uc_plat
*uc_plat
= dev_get_uclass_platdata(dev
);
62 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
64 /* Ignore the top-level LED node */
67 return gpio_request_by_name(dev
, "gpios", 0, &priv
->gpio
, GPIOD_IS_OUT
);
70 static int led_gpio_remove(struct udevice
*dev
)
73 * The GPIO driver may have already been removed. We will need to
74 * address this more generally.
76 #ifndef CONFIG_SANDBOX
77 struct led_gpio_priv
*priv
= dev_get_priv(dev
);
79 if (dm_gpio_is_valid(&priv
->gpio
))
80 dm_gpio_free(dev
, &priv
->gpio
);
86 static int led_gpio_bind(struct udevice
*parent
)
92 dev_for_each_subnode(node
, parent
) {
93 struct led_uc_plat
*uc_plat
;
96 label
= ofnode_read_string(node
, "label");
98 debug("%s: node %s has no label\n", __func__
,
99 ofnode_get_name(node
));
102 ret
= device_bind_driver_to_node(parent
, "gpio_led",
103 ofnode_get_name(node
),
107 uc_plat
= dev_get_uclass_platdata(dev
);
108 uc_plat
->label
= label
;
114 static const struct led_ops gpio_led_ops
= {
115 .set_state
= gpio_led_set_state
,
116 .get_state
= gpio_led_get_state
,
119 static const struct udevice_id led_gpio_ids
[] = {
120 { .compatible
= "gpio-leds" },
124 U_BOOT_DRIVER(led_gpio
) = {
127 .of_match
= led_gpio_ids
,
128 .ops
= &gpio_led_ops
,
129 .priv_auto_alloc_size
= sizeof(struct led_gpio_priv
),
130 .bind
= led_gpio_bind
,
131 .probe
= led_gpio_probe
,
132 .remove
= led_gpio_remove
,