mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 21:24:29 +00:00
325141a6ea
Adds a command 'button' that provides the list of buttons supported by the board, and the state of a button. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
86 lines
1.6 KiB
C
86 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
|
|
*
|
|
* Based on led.c
|
|
*/
|
|
|
|
#include <common.h>
|
|
#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_platdata(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 0;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
button, 4, 1, do_button,
|
|
"manage buttons",
|
|
"<button_label> \tGet button state\n"
|
|
"button list\t\tShow a list of buttons"
|
|
);
|