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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
*
* 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"
);
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