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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2015 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #define LOG_CATEGORY UCLASS_LED
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <led.h>
- #include <dm/device-internal.h>
- #include <dm/root.h>
- #include <dm/uclass-internal.h>
- int led_get_by_label(const char *label, struct udevice **devp)
- {
- struct udevice *dev;
- struct uclass *uc;
- int ret;
- ret = uclass_get(UCLASS_LED, &uc);
- if (ret)
- return ret;
- uclass_foreach_dev(dev, uc) {
- struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
- /* Ignore the top-level LED node */
- if (uc_plat->label && !strcmp(label, uc_plat->label))
- return uclass_get_device_tail(dev, 0, devp);
- }
- return -ENODEV;
- }
- int led_set_state(struct udevice *dev, enum led_state_t state)
- {
- struct led_ops *ops = led_get_ops(dev);
- if (!ops->set_state)
- return -ENOSYS;
- return ops->set_state(dev, state);
- }
- enum led_state_t led_get_state(struct udevice *dev)
- {
- struct led_ops *ops = led_get_ops(dev);
- if (!ops->get_state)
- return -ENOSYS;
- return ops->get_state(dev);
- }
- #ifdef CONFIG_LED_BLINK
- int led_set_period(struct udevice *dev, int period_ms)
- {
- struct led_ops *ops = led_get_ops(dev);
- if (!ops->set_period)
- return -ENOSYS;
- return ops->set_period(dev, period_ms);
- }
- #endif
- int led_default_state(void)
- {
- struct udevice *dev;
- struct uclass *uc;
- const char *default_state;
- int ret;
- ret = uclass_get(UCLASS_LED, &uc);
- if (ret)
- return ret;
- for (uclass_find_first_device(UCLASS_LED, &dev);
- dev;
- uclass_find_next_device(&dev)) {
- default_state = dev_read_string(dev, "default-state");
- if (!default_state)
- continue;
- ret = device_probe(dev);
- if (ret)
- return ret;
- if (!strncmp(default_state, "on", 2))
- led_set_state(dev, LEDST_ON);
- else if (!strncmp(default_state, "off", 3))
- led_set_state(dev, LEDST_OFF);
- /* default-state = "keep" : device is only probed */
- }
- return ret;
- }
- UCLASS_DRIVER(led) = {
- .id = UCLASS_LED,
- .name = "led",
- .per_device_plat_auto = sizeof(struct led_uc_plat),
- };
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