Adds a command 'button' that provides the list of buttons supported by the board, and the state of a button.
Signed-off-by: Philippe Reynes philippe.reynes@softathome.com --- cmd/Kconfig | 11 ++++++++ cmd/Makefile | 1 + cmd/button.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 98 insertions(+) create mode 100644 cmd/button.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 192b3b2..750d26a 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1664,6 +1664,17 @@ config CMD_BLOCK_CACHE during development, but also allows the cache to be disabled when it might hurt performance (e.g. when using the ums command).
+config CMD_BUTTON + bool "button" + depends on BUTTON + default y if BUTTON + help + Enable the 'button' command which allows to get the status of + buttons supported by the board. The buttonss can be listed with + 'button list' and state can be known with 'button <label>'. + Any button drivers can be controlled with this command, e.g. + button_gpio. + config CMD_CACHE bool "icache or dcache" help diff --git a/cmd/Makefile b/cmd/Makefile index 974ad48..5ded3a6 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_CMD_BOOTSTAGE) += bootstage.o obj-$(CONFIG_CMD_BOOTZ) += bootz.o obj-$(CONFIG_CMD_BOOTI) += booti.o obj-$(CONFIG_CMD_BTRFS) += btrfs.o +obj-$(CONFIG_CMD_BUTTON) += button.o obj-$(CONFIG_CMD_CACHE) += cache.o obj-$(CONFIG_CMD_CBFS) += cbfs.o obj-$(CONFIG_CMD_CLK) += clk.o diff --git a/cmd/button.c b/cmd/button.c new file mode 100644 index 0000000..84ad165 --- /dev/null +++ b/cmd/button.c @@ -0,0 +1,86 @@ +// 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" +);