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@glider.be>
Link: https://lore.kernel.org/r/011e4c461767f2dd690b655b3dd501eb554184c1.1619785905.git.geert+renesas@glider.be
keyboard {
compatible = "gpio-keys";
+ pinctrl-0 = <&keyboard_pins>;
+ pinctrl-names = "default";
+
key-1 {
linux,code = <KEY_1>;
label = "SW2-1";
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";