6.12-stable review patch. If anyone has any objections, please let me know.
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From: Chen-Yu Tsai wenst@chromium.org
[ Upstream commit f766fae08f6a2eaeb45d8d2c053724c91526835c ]
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 Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Link: https://lore.kernel.org/r/20241018082001.1296963-1-wenst@chromium.org Signed-off-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi index 8d1cbc92bce32..ae0379fd42a91 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; }; };