We don't have audio support in U-Boot, but we do have boot menus. Add an
option to re-map the volume and power buttons to up/down/enter so that
in situations where these are the only available buttons (such as on
mobile phones) it's still possible to navigate menus built in U-Boot or
an external EFI app like GRUB or systemd-boot.
Signed-off-by: Caleb Connolly <caleb.conno...@linaro.org>
---
Cc: u-boot-q...@groups.io
---
drivers/button/Kconfig | 11 +++++++++++
drivers/button/button-uclass.c | 22 +++++++++++++++++++++-
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/button/Kconfig b/drivers/button/Kconfig
index 3918b05ae03e..6cae16fcc8bf 100644
--- a/drivers/button/Kconfig
+++ b/drivers/button/Kconfig
@@ -8,8 +8,19 @@ config BUTTON
U-Boot provides a uclass API to implement this feature. Button drivers
can provide access to board-specific buttons. Use of the device tree
for configuration is encouraged.
+config BUTTON_REMAP_PHONE_KEYS
+ bool "Remap phone keys for navigation"
+ depends on BUTTON
+ help
+ Enable remapping of phone keys to navigation keys. This is useful for
+ devices with phone keys that are not used in U-Boot. The phone keys
+ are remapped to the following navigation keys:
+ - Volume up: Up
+ - Volume down: Down
+ - Power: Enter
+
config BUTTON_ADC
bool "Button adc"
depends on BUTTON
depends on ADC
diff --git a/drivers/button/button-uclass.c b/drivers/button/button-uclass.c
index cda243389df3..729983d58701 100644
--- a/drivers/button/button-uclass.c
+++ b/drivers/button/button-uclass.c
@@ -9,8 +9,9 @@
#include <button.h>
#include <dm.h>
#include <dm/uclass-internal.h>
+#include <dt-bindings/input/linux-event-codes.h>
int button_get_by_label(const char *label, struct udevice **devp)
{
struct udevice *dev;
@@ -36,16 +37,35 @@ enum button_state_t button_get_state(struct udevice *dev)
return ops->get_state(dev);
}
+static int button_remap_phone_keys(int code)
+{
+ switch (code) {
+ case KEY_VOLUMEUP:
+ return KEY_UP;
+ case KEY_VOLUMEDOWN:
+ return KEY_DOWN;
+ case KEY_POWER:
+ return KEY_ENTER;
+ default:
+ return code;
+ }
+}
+
int button_get_code(struct udevice *dev)
{
struct button_ops *ops = button_get_ops(dev);
+ int code;
if (!ops->get_code)
return -ENOSYS;
- return ops->get_code(dev);
+ code = ops->get_code(dev);
+ if (CONFIG_IS_ENABLED(BUTTON_REMAP_PHONE_KEYS))
+ return button_remap_phone_keys(code);
+ else
+ return code;
}
UCLASS_DRIVER(button) = {
.id = UCLASS_BUTTON,
--
2.45.2
