183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
25ac76badSSimon Glass /*
35ac76badSSimon Glass * Copyright (c) 2015 Google, Inc
45ac76badSSimon Glass * Written by Simon Glass <sjg@chromium.org>
55ac76badSSimon Glass */
65ac76badSSimon Glass
75ac76badSSimon Glass #include <common.h>
85ac76badSSimon Glass #include <dm.h>
95ac76badSSimon Glass #include <errno.h>
105ac76badSSimon Glass #include <led.h>
115ac76badSSimon Glass #include <asm/gpio.h>
125ac76badSSimon Glass #include <dm/lists.h>
135ac76badSSimon Glass
145ac76badSSimon Glass struct led_gpio_priv {
155ac76badSSimon Glass struct gpio_desc gpio;
165ac76badSSimon Glass };
175ac76badSSimon Glass
gpio_led_set_state(struct udevice * dev,enum led_state_t state)18ddae9fcdSSimon Glass static int gpio_led_set_state(struct udevice *dev, enum led_state_t state)
195ac76badSSimon Glass {
205ac76badSSimon Glass struct led_gpio_priv *priv = dev_get_priv(dev);
219413ad4fSSimon Glass int ret;
225ac76badSSimon Glass
235ac76badSSimon Glass if (!dm_gpio_is_valid(&priv->gpio))
245ac76badSSimon Glass return -EREMOTEIO;
258f4b6123SSimon Glass switch (state) {
268f4b6123SSimon Glass case LEDST_OFF:
278f4b6123SSimon Glass case LEDST_ON:
288f4b6123SSimon Glass break;
299413ad4fSSimon Glass case LEDST_TOGGLE:
309413ad4fSSimon Glass ret = dm_gpio_get_value(&priv->gpio);
319413ad4fSSimon Glass if (ret < 0)
329413ad4fSSimon Glass return ret;
339413ad4fSSimon Glass state = !ret;
349413ad4fSSimon Glass break;
358f4b6123SSimon Glass default:
368f4b6123SSimon Glass return -ENOSYS;
378f4b6123SSimon Glass }
385ac76badSSimon Glass
39ddae9fcdSSimon Glass return dm_gpio_set_value(&priv->gpio, state);
405ac76badSSimon Glass }
415ac76badSSimon Glass
gpio_led_get_state(struct udevice * dev)428f4b6123SSimon Glass static enum led_state_t gpio_led_get_state(struct udevice *dev)
438f4b6123SSimon Glass {
448f4b6123SSimon Glass struct led_gpio_priv *priv = dev_get_priv(dev);
458f4b6123SSimon Glass int ret;
468f4b6123SSimon Glass
478f4b6123SSimon Glass if (!dm_gpio_is_valid(&priv->gpio))
488f4b6123SSimon Glass return -EREMOTEIO;
498f4b6123SSimon Glass ret = dm_gpio_get_value(&priv->gpio);
508f4b6123SSimon Glass if (ret < 0)
518f4b6123SSimon Glass return ret;
528f4b6123SSimon Glass
538f4b6123SSimon Glass return ret ? LEDST_ON : LEDST_OFF;
548f4b6123SSimon Glass }
558f4b6123SSimon Glass
led_gpio_probe(struct udevice * dev)565ac76badSSimon Glass static int led_gpio_probe(struct udevice *dev)
575ac76badSSimon Glass {
5856e19871SSimon Glass struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
595ac76badSSimon Glass struct led_gpio_priv *priv = dev_get_priv(dev);
60*d90f0d4cSPatrick Bruenn int ret;
615ac76badSSimon Glass
625ac76badSSimon Glass /* Ignore the top-level LED node */
635ac76badSSimon Glass if (!uc_plat->label)
645ac76badSSimon Glass return 0;
65*d90f0d4cSPatrick Bruenn
66*d90f0d4cSPatrick Bruenn ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
67*d90f0d4cSPatrick Bruenn if (ret)
68*d90f0d4cSPatrick Bruenn return ret;
69*d90f0d4cSPatrick Bruenn
70*d90f0d4cSPatrick Bruenn return 0;
715ac76badSSimon Glass }
725ac76badSSimon Glass
led_gpio_remove(struct udevice * dev)735ac76badSSimon Glass static int led_gpio_remove(struct udevice *dev)
745ac76badSSimon Glass {
753c43fba3SSimon Glass /*
763c43fba3SSimon Glass * The GPIO driver may have already been removed. We will need to
773c43fba3SSimon Glass * address this more generally.
783c43fba3SSimon Glass */
793c43fba3SSimon Glass #ifndef CONFIG_SANDBOX
805ac76badSSimon Glass struct led_gpio_priv *priv = dev_get_priv(dev);
815ac76badSSimon Glass
825ac76badSSimon Glass if (dm_gpio_is_valid(&priv->gpio))
835ac76badSSimon Glass dm_gpio_free(dev, &priv->gpio);
843c43fba3SSimon Glass #endif
855ac76badSSimon Glass
865ac76badSSimon Glass return 0;
875ac76badSSimon Glass }
885ac76badSSimon Glass
led_gpio_bind(struct udevice * parent)895ac76badSSimon Glass static int led_gpio_bind(struct udevice *parent)
905ac76badSSimon Glass {
915ac76badSSimon Glass struct udevice *dev;
9245a26867SSimon Glass ofnode node;
935ac76badSSimon Glass int ret;
945ac76badSSimon Glass
9545a26867SSimon Glass dev_for_each_subnode(node, parent) {
9656e19871SSimon Glass struct led_uc_plat *uc_plat;
975ac76badSSimon Glass const char *label;
985ac76badSSimon Glass
9945a26867SSimon Glass label = ofnode_read_string(node, "label");
1005ac76badSSimon Glass if (!label) {
1015ac76badSSimon Glass debug("%s: node %s has no label\n", __func__,
10245a26867SSimon Glass ofnode_get_name(node));
1035ac76badSSimon Glass return -EINVAL;
1045ac76badSSimon Glass }
1055ac76badSSimon Glass ret = device_bind_driver_to_node(parent, "gpio_led",
10645a26867SSimon Glass ofnode_get_name(node),
1075ac76badSSimon Glass node, &dev);
1085ac76badSSimon Glass if (ret)
1095ac76badSSimon Glass return ret;
1105ac76badSSimon Glass uc_plat = dev_get_uclass_platdata(dev);
1115ac76badSSimon Glass uc_plat->label = label;
1125ac76badSSimon Glass }
1135ac76badSSimon Glass
1145ac76badSSimon Glass return 0;
1155ac76badSSimon Glass }
1165ac76badSSimon Glass
1175ac76badSSimon Glass static const struct led_ops gpio_led_ops = {
118ddae9fcdSSimon Glass .set_state = gpio_led_set_state,
1198f4b6123SSimon Glass .get_state = gpio_led_get_state,
1205ac76badSSimon Glass };
1215ac76badSSimon Glass
1225ac76badSSimon Glass static const struct udevice_id led_gpio_ids[] = {
1235ac76badSSimon Glass { .compatible = "gpio-leds" },
1245ac76badSSimon Glass { }
1255ac76badSSimon Glass };
1265ac76badSSimon Glass
1275ac76badSSimon Glass U_BOOT_DRIVER(led_gpio) = {
1285ac76badSSimon Glass .name = "gpio_led",
1295ac76badSSimon Glass .id = UCLASS_LED,
1305ac76badSSimon Glass .of_match = led_gpio_ids,
1315ac76badSSimon Glass .ops = &gpio_led_ops,
1325ac76badSSimon Glass .priv_auto_alloc_size = sizeof(struct led_gpio_priv),
1335ac76badSSimon Glass .bind = led_gpio_bind,
1345ac76badSSimon Glass .probe = led_gpio_probe,
1355ac76badSSimon Glass .remove = led_gpio_remove,
1365ac76badSSimon Glass };
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