The GPIO pins connected to the 4 Software Switches (SW2) and the second
Tact Switch (SW25) do not have external pull-up resistors, but rely on
internal pull-ups being enabled. Fortunately this is satisfied by the
initial state of these pins.
Make this explicit by enabling bias-pull-up, to remove the dependency on
initial state and/or boot loader configuration.
Note that the GPIO pin connected to the first Tact Switch (SW24) does
have an external pull-up resistor.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
arch/arm/boot/dts/r8a7792-blanche.dts | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/r8a7792-blanche.dts b/arch/arm/boot/dts/r8a7792-blanche.dts
index c100ae903a46bb1c..62aa9f61321bea74 100644
--- a/arch/arm/boot/dts/r8a7792-blanche.dts
+++ b/arch/arm/boot/dts/r8a7792-blanche.dts
@@ -112,6 +112,9 @@ x2_clk: x2 {
keyboard {
compatible = "gpio-keys";
+ pinctrl-0 = <&keyboard_pins>;
+ pinctrl-names = "default";
+
key-1 {
linux,code = <KEY_1>;
label = "SW2-1";
@@ -235,6 +238,11 @@ du1_pins: du1 {
function = "du1";
};
+ keyboard_pins: keyboard {
+ pins = "GP_3_10", "GP_3_11", "GP_3_12", "GP_3_15", "GP_11_02";
+ bias-pull-up;
+ };
+
pmic_irq_pins: pmicirq {
groups = "intc_irq2";
function = "intc";
--
2.25.1
