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arm64: dts: mediatek: mt8186-tentacruel: Fix touchscreen model

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The touchscreen controller used with the original Krabby design is the
Elan eKTH6918, which is in the same family as eKTH6915, but supporting
a larger screen size with more sense lines.

OTOH, the touchscreen controller that actually shipped on the Tentacruel
devices is the Elan eKTH6A12NAY. A compatible string was added for it
specifically because it has different power sequencing timings.

Fix up the touchscreen nodes for both these. This also includes adding
a previously missing reset line. Also add "no-reset-on-power-off" since
the power is always on, and putting it in reset would consume more
power.

Fixes: 8855d01fb8 ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20250812090135.3310374-1-wenst@chromium.org
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Chen-Yu Tsai 2025-08-12 17:01:34 +08:00 committed by Matthias Brugger
parent c881d1c37b
commit 0370911565
2 changed files with 8 additions and 4 deletions
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8
arch/arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi
View File

@ -71,14 +71,14 @@ &i2c1 {
i2c-scl-internal-delay-ns = <10000>;
touchscreen: touchscreen@10 {
compatible = "hid-over-i2c";
compatible = "elan,ekth6915";
reg = <0x10>;
interrupts-extended = <&pio 12 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&touchscreen_pins>;
post-power-on-delay-ms = <10>;
hid-descr-addr = <0x0001>;
vdd-supply = <&pp3300_s3>;
reset-gpios = <&pio 60 GPIO_ACTIVE_LOW>;
vcc33-supply = <&pp3300_s3>;
no-reset-on-power-off;
};
};

4
arch/arm64/boot/dts/mediatek/mt8186-corsola-tentacruel-sku262144.dts
View File

@ -42,3 +42,7 @@ MATRIX_KEY(0x00, 0x04, KEY_VOLUMEUP)
CROS_STD_MAIN_KEYMAP
>;
};
&touchscreen {
compatible = "elan,ekth6a12nay";
};