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ARM: dts: lager: Configure pull-up for SOFT_SW GPIO keys 

The GPIO pins connected to the 4 Software Switches (SW2) 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.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/9fae3c0c2c0000f6b43c9ce87fe64a594b30a7da.1619785905.git.geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven 2021-04-30 15:10:52 +02:00
parent 659b38203f
commit 28cce9540b
1 changed files with 8 additions and 0 deletions
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8
arch/arm/boot/dts/r8a7790-lager.dts
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@ -81,6 +81,9 @@
keyboard {
compatible = "gpio-keys";
pinctrl-0 = <&keyboard_pins>;
pinctrl-names = "default";
one {
linux,code = <KEY_1>;
label = "SW2-1";
@ -659,6 +662,11 @@
groups = "audio_clk_a";
function = "audio_clk";
};
keyboard_pins: keyboard {
pins = "GP_1_14", "GP_1_24", "GP_1_26", "GP_1_28";
bias-pull-up;
};
};
&ether {