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ARM: dts: blanche: Configure pull-up for SOFT_SW and SW25 GPIO keys

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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
This commit is contained in:
Geert Uytterhoeven 2021-04-30 15:10:53 +02:00
parent 28cce9540b
commit 1f27fedead
1 changed files with 8 additions and 0 deletions
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8
arch/arm/boot/dts/r8a7792-blanche.dts
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@ -112,6 +112,9 @@ x2_clk: x2 {
keyboard { keyboard {
compatible = "gpio-keys"; compatible = "gpio-keys";
pinctrl-0 = <&keyboard_pins>;
pinctrl-names = "default";
key-1 { key-1 {
linux,code = <KEY_1>; linux,code = <KEY_1>;
label = "SW2-1"; label = "SW2-1";
@ -235,6 +238,11 @@ du1_pins: du1 {
function = "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 { pmic_irq_pins: pmicirq {
groups = "intc_irq2"; groups = "intc_irq2";
function = "intc"; function = "intc";