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https://github.com/AsahiLinux/u-boot
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30d66db787
Add a new uclass for button that implements two functions: - button_get_by_label - button_get_status Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
43 lines
952 B
C
43 lines
952 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
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*
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* Based on led-uclass.c
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*/
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#include <common.h>
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#include <button.h>
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#include <dm.h>
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#include <dm/uclass-internal.h>
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int button_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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uclass_id_foreach_dev(UCLASS_BUTTON, dev, uc) {
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struct button_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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/* Ignore the top-level button 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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enum button_state_t button_get_state(struct udevice *dev)
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{
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struct button_ops *ops = button_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(button) = {
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.id = UCLASS_BUTTON,
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.name = "button",
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.per_device_platdata_auto_alloc_size = sizeof(struct button_uc_plat),
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};
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