| Message ID | 20241018082001.1296963-1-wenst@chromium.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] arm64: dts: mediatek: mt8173-elm-hana: Add vdd-supply to second source trackpad | expand |
diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi index 8d1cbc92bce3..ae0379fd42a9 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi @@ -49,6 +49,14 @@ trackpad2: trackpad@2c { interrupts-extended = <&pio 117 IRQ_TYPE_LEVEL_LOW>; reg = <0x2c>; hid-descr-addr = <0x0020>; + /* + * The trackpad needs a post-power-on delay of 100ms, + * but at time of writing, the power supply for it on + * this board is always on. The delay is therefore not + * added to avoid impacting the readiness of the + * trackpad. + */ + vdd-supply = <&mt6397_vgp6_reg>; wakeup-source; }; };
The Hana device has a second source option trackpad, but it is missing its regulator supply. It only works because the regulator is marked as always-on. Add the regulator supply, but leave out the post-power-on delay. Instead, document the post-power-on delay along with the reason for not adding it in a comment. Fixes: 689b937bedde ("arm64: dts: mediatek: add mt8173 elm and hana board") Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- Changes since v1: - Drop the commented post-power-on-delay-ms property - Document the delay in a comment --- arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)