[J-u-boot.git] / cmd / button.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2020 Philippe Reynes <[email protected]>
 *
 * Based on led.c
 */

#include <command.h>
#include <dm.h>
#include <button.h>
#include <dm/uclass-internal.h>

static const char *const state_label[] = {
	[BUTTON_OFF]	= "off",
	[BUTTON_ON]	= "on",
};

static int show_button_state(struct udevice *dev)
{
	int ret;

	ret = button_get_state(dev);
	if (ret >= BUTTON_COUNT)
		ret = -EINVAL;
	if (ret >= 0)
		printf("%s\n", state_label[ret]);

	return ret;
}

static int list_buttons(void)
{
	struct udevice *dev;
	int ret;

	for (uclass_find_first_device(UCLASS_BUTTON, &dev);
	     dev;
	     uclass_find_next_device(&dev)) {
		struct button_uc_plat *plat = dev_get_uclass_plat(dev);

		if (!plat->label)
			continue;
		printf("%-15s ", plat->label);
		if (device_active(dev)) {
			ret = show_button_state(dev);
			if (ret < 0)
				printf("Error %d\n", ret);
		} else {
			printf("<inactive>\n");
		}
	}

	return 0;
}

int do_button(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
	const char *button_label;
	struct udevice *dev;
	int ret;

	/* Validate arguments */
	if (argc < 2)
		return CMD_RET_USAGE;
	button_label = argv[1];
	if (strncmp(button_label, "list", 4) == 0)
		return list_buttons();

	ret = button_get_by_label(button_label, &dev);
	if (ret) {
		printf("Button '%s' not found (err=%d)\n", button_label, ret);
		return CMD_RET_FAILURE;
	}

	ret = show_button_state(dev);

	return !ret;
}

U_BOOT_CMD(
	button, 2, 1, do_button,
	"manage buttons",
	"<button_label> \tGet button state\n"
	"button list\t\tShow a list of buttons"
);
Commit	Line	Data
325141a6 PR	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (C) 2020 Philippe Reynes <[email protected]>
	4	*
	5	* Based on led.c
	6	*/
	7
325141a6 PR	8	#include <command.h>
	9	#include <dm.h>
	10	#include <button.h>
	11	#include <dm/uclass-internal.h>
	12
	13	static const char *const state_label[] = {
	14	[BUTTON_OFF] = "off",
	15	[BUTTON_ON] = "on",
	16	};
	17
	18	static int show_button_state(struct udevice *dev)
	19	{
	20	int ret;
	21
	22	ret = button_get_state(dev);
	23	if (ret >= BUTTON_COUNT)
	24	ret = -EINVAL;
	25	if (ret >= 0)
	26	printf("%s\n", state_label[ret]);
	27
	28	return ret;
	29	}
	30
	31	static int list_buttons(void)
	32	{
	33	struct udevice *dev;
	34	int ret;
	35
	36	for (uclass_find_first_device(UCLASS_BUTTON, &dev);
	37	dev;
	38	uclass_find_next_device(&dev)) {
caa4daa2	39	struct button_uc_plat *plat = dev_get_uclass_plat(dev);
325141a6 PR	40
	41	if (!plat->label)
	42	continue;
	43	printf("%-15s ", plat->label);
	44	if (device_active(dev)) {
	45	ret = show_button_state(dev);
	46	if (ret < 0)
	47	printf("Error %d\n", ret);
	48	} else {
	49	printf("<inactive>\n");
	50	}
	51	}
	52
	53	return 0;
	54	}
	55
	56	int do_button(struct cmd_tbl cmdtp, int flag, int argc, char const argv[])
	57	{
	58	const char *button_label;
	59	struct udevice *dev;
	60	int ret;
	61
	62	/* Validate arguments */
	63	if (argc < 2)
	64	return CMD_RET_USAGE;
	65	button_label = argv[1];
	66	if (strncmp(button_label, "list", 4) == 0)
	67	return list_buttons();
	68
	69	ret = button_get_by_label(button_label, &dev);
	70	if (ret) {
	71	printf("Button '%s' not found (err=%d)\n", button_label, ret);
	72	return CMD_RET_FAILURE;
	73	}
	74
	75	ret = show_button_state(dev);
	76
a6bfd71a	77	return !ret;
325141a6 PR	78	}
	79
	80	U_BOOT_CMD(
a6bfd71a	81	button, 2, 1, do_button,
325141a6 PR	82	"manage buttons",
	83	"<button_label> \tGet button state\n"
	84	"button list\t\tShow a list of buttons"
	85	);