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https://github.com/brain-hackers/u-boot-brain
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8f4b612333
It is useful to be able to read the LED as well as write it. Add this to the uclass and update the GPIO driver. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ziping Chen <techping.chan@gmail.com>
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <led.h>
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#include <dm/root.h>
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#include <dm/uclass-internal.h>
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int led_get_by_label(const char *label, struct udevice **devp)
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{
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struct udevice *dev;
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struct uclass *uc;
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int ret;
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ret = uclass_get(UCLASS_LED, &uc);
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if (ret)
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return ret;
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uclass_foreach_dev(dev, uc) {
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struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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/* Ignore the top-level LED node */
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if (uc_plat->label && !strcmp(label, uc_plat->label))
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return uclass_get_device_tail(dev, 0, devp);
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}
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return -ENODEV;
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}
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int led_set_state(struct udevice *dev, enum led_state_t state)
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{
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struct led_ops *ops = led_get_ops(dev);
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if (!ops->set_state)
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return -ENOSYS;
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return ops->set_state(dev, state);
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}
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enum led_state_t led_get_state(struct udevice *dev)
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{
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struct led_ops *ops = led_get_ops(dev);
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if (!ops->get_state)
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return -ENOSYS;
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return ops->get_state(dev);
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}
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UCLASS_DRIVER(led) = {
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.id = UCLASS_LED,
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.name = "led",
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.per_device_platdata_auto_alloc_size = sizeof(struct led_uc_plat),
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};
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