Hi
On 29.08.19 07:28, Ahmad Fatoum wrote:
Kernel device trees may indicate linux,code = KEY_POWER or KEY_RESTART,
mostly for gpio-keys. Make barebox able to act on them by registering an
appropriate input notifier.
Suggested-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/input/Kconfig | 6 ++++++
drivers/input/Makefile | 1 +
drivers/input/specialkeys.c | 36 ++++++++++++++++++++++++++++++++++++
3 files changed, 43 insertions(+)
create mode 100644 drivers/input/specialkeys.c
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index 1f89ae3892dc..be061683fb0a 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -64,4 +64,10 @@ config KEYBOARD_USB
help
This driver implements support for usb keyboard.
+config INPUT_SPECIALKEYS
+ bool "Special keys handler"
+ select INPUT
+ help
+ Say Y here to handle key events like KEY_RESTART and KEY_POWER.
+
endmenu
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index e694a98d1087..36a4204d5308 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o
obj-$(CONFIG_KEYBOARD_TWL6030) += twl6030_pwrbtn.o
obj-$(CONFIG_KEYBOARD_IMX_KEYPAD) += imx_keypad.o
obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o
+obj-$(CONFIG_INPUT_SPECIALKEYS) += specialkeys.o
diff --git a/drivers/input/specialkeys.c b/drivers/input/specialkeys.c
new file mode 100644
index 000000000000..51ee43218192
--- /dev/null
+++ b/drivers/input/specialkeys.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Ahmad Fatoum, Pengutronix
+
+#include <common.h>
+#include <restart.h>
+#include <poweroff.h>
+#include <init.h>
+#include <input/input.h>
+#include <dt-bindings/input/linux-event-codes.h>
+
+static void input_specialkeys_notify(struct input_notifier *in,
+ struct input_event *ev)
+{
+ switch (ev->code) {
+ case KEY_RESTART:
+ pr_debug("code: %d. Triggering reset.\n", ev->code);
May be it is better to increase the pr_ level, for example to pr_info? In case we have
some buggy KEY (wrong active level, or floating input gpio) we can easily detect it.
+ restart_machine();
+ break;
+
+ case KEY_POWER:
+ pr_debug("code: %d. Triggering poweroff.\n", ev->code);
same here.
+ poweroff_machine();
+ break;
+ }
+
+ pr_debug("ignoring code: %d\n", ev->code);
+}
+
+static struct input_notifier notifier;
+
+static int input_specialkeys_init(void)
+{
+ notifier.notify = input_specialkeys_notify;
+ return input_register_notfier(¬ifier);
+}
+late_initcall(input_specialkeys_init);
Kind regards,
Oleksij Rempel
--
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Industrial Linux Solutions | http://www.pengutronix.de/ |
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