The switches on r8a73a4/ape6evm do not have pull-up registers. The
schematics say: "Need to use APE6 internal PullUp", hence enable pull-up
using pinctrl.
Without this, the switches don't really work, as the GPIO inputs are
more likely to pick up ghost signals through capacitive coupling than
actual keypresses.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
arch/arm/boot/dts/r8a73a4-ape6evm.dts | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm/boot/dts/r8a73a4-ape6evm.dts b/arch/arm/boot/dts/r8a73a4-ape6evm.dts
index b355fafc32f188dc..5baada97bc715838 100644
--- a/arch/arm/boot/dts/r8a73a4-ape6evm.dts
+++ b/arch/arm/boot/dts/r8a73a4-ape6evm.dts
@@ -103,6 +103,9 @@
keyboard {
compatible = "gpio-keys";
+ pinctrl-names = "default";
+ pinctrl-0 = <&keyboard_pins>;
+
zero-key {
gpios = <&pfc 324 GPIO_ACTIVE_LOW>;
linux,code = <KEY_0>;
@@ -203,6 +206,12 @@
renesas,groups = "sdhi1_data4", "sdhi1_ctrl";
renesas,function = "sdhi1";
};
+
+ keyboard_pins: keyboard {
+ renesas,pins = "PORT324", "PORT325", "PORT326", "PORT327",
+ "PORT328", "PORT329";
+ bias-pull-up;
+ };
};
&mmcif0 {
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
