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https://github.com/brain-hackers/u-boot-brain
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5917112c9e
Add a simple uclass for LEDs, so that these can be controlled by the device tree and activated when needed. LEDs are referred to by their label. This implementation requires a driver for each type of LED (e.g GPIO, I2C). Signed-off-by: Simon Glass <sjg@chromium.org>
49 lines
933 B
C
49 lines
933 B
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_uclass_plat *uc_plat = dev_get_uclass_platdata(dev);
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if (!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 -ENOENT;
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}
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int led_set_on(struct udevice *dev, int on)
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{
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struct led_ops *ops = led_get_ops(dev);
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if (!ops->set_on)
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return -ENOSYS;
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return ops->set_on(dev, on);
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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_uclass_plat),
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};
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