15917112cSSimon Glass /* 25917112cSSimon Glass * Copyright (c) 2015 Google, Inc 35917112cSSimon Glass * Written by Simon Glass <sjg@chromium.org> 45917112cSSimon Glass * 55917112cSSimon Glass * SPDX-License-Identifier: GPL-2.0+ 65917112cSSimon Glass */ 75917112cSSimon Glass 85917112cSSimon Glass #include <common.h> 95917112cSSimon Glass #include <dm.h> 105917112cSSimon Glass #include <errno.h> 115917112cSSimon Glass #include <led.h> 125917112cSSimon Glass #include <dm/root.h> 135917112cSSimon Glass #include <dm/uclass-internal.h> 145917112cSSimon Glass 155917112cSSimon Glass int led_get_by_label(const char *label, struct udevice **devp) 165917112cSSimon Glass { 175917112cSSimon Glass struct udevice *dev; 185917112cSSimon Glass struct uclass *uc; 195917112cSSimon Glass int ret; 205917112cSSimon Glass 215917112cSSimon Glass ret = uclass_get(UCLASS_LED, &uc); 225917112cSSimon Glass if (ret) 235917112cSSimon Glass return ret; 245917112cSSimon Glass uclass_foreach_dev(dev, uc) { 2556e19871SSimon Glass struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); 265917112cSSimon Glass 27fb8a5ffcSSimon Glass /* Ignore the top-level LED node */ 28fb8a5ffcSSimon Glass if (uc_plat->label && !strcmp(label, uc_plat->label)) 295917112cSSimon Glass return uclass_get_device_tail(dev, 0, devp); 305917112cSSimon Glass } 315917112cSSimon Glass 32fb8a5ffcSSimon Glass return -ENODEV; 335917112cSSimon Glass } 345917112cSSimon Glass 35ddae9fcdSSimon Glass int led_set_state(struct udevice *dev, enum led_state_t state) 365917112cSSimon Glass { 375917112cSSimon Glass struct led_ops *ops = led_get_ops(dev); 385917112cSSimon Glass 39ddae9fcdSSimon Glass if (!ops->set_state) 405917112cSSimon Glass return -ENOSYS; 415917112cSSimon Glass 42ddae9fcdSSimon Glass return ops->set_state(dev, state); 435917112cSSimon Glass } 445917112cSSimon Glass 458f4b6123SSimon Glass enum led_state_t led_get_state(struct udevice *dev) 468f4b6123SSimon Glass { 478f4b6123SSimon Glass struct led_ops *ops = led_get_ops(dev); 488f4b6123SSimon Glass 498f4b6123SSimon Glass if (!ops->get_state) 508f4b6123SSimon Glass return -ENOSYS; 518f4b6123SSimon Glass 528f4b6123SSimon Glass return ops->get_state(dev); 538f4b6123SSimon Glass } 548f4b6123SSimon Glass 55*53378dacSSimon Glass #ifdef CONFIG_LED_BLINK 56*53378dacSSimon Glass int led_set_period(struct udevice *dev, int period_ms) 57*53378dacSSimon Glass { 58*53378dacSSimon Glass struct led_ops *ops = led_get_ops(dev); 59*53378dacSSimon Glass 60*53378dacSSimon Glass if (!ops->set_period) 61*53378dacSSimon Glass return -ENOSYS; 62*53378dacSSimon Glass 63*53378dacSSimon Glass return ops->set_period(dev, period_ms); 64*53378dacSSimon Glass } 65*53378dacSSimon Glass #endif 66*53378dacSSimon Glass 675917112cSSimon Glass UCLASS_DRIVER(led) = { 685917112cSSimon Glass .id = UCLASS_LED, 695917112cSSimon Glass .name = "led", 7056e19871SSimon Glass .per_device_platdata_auto_alloc_size = sizeof(struct led_uc_plat), 715917112cSSimon Glass }; 72