// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2015 Google, Inc * Written by Simon Glass */ #define LOG_CATEGORY UCLASS_LED #include #include #include #include #include #include #include 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), };