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Tue, 12 Aug 2025 02:01:41 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2401:fa00:1:10:f81e:7c91:8fbf:672a]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-76bccfbcee7sm29052518b3a.66.2025.08.12.02.01.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Aug 2025 02:01:41 -0700 (PDT) From: Chen-Yu Tsai To: Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH] arm64: dts: mediatek: mt8186-tentacruel: Fix touchscreen model Date: Tue, 12 Aug 2025 17:01:34 +0800 Message-ID: <20250812090135.3310374-1-wenst@chromium.org> X-Mailer: git-send-email 2.51.0.rc0.215.g125493bb4a-goog Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform base= d Tentacruel / Tentacool") Signed-off-by: Chen-Yu Tsai --- arch/arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi | 8 ++++---- .../dts/mediatek/mt8186-corsola-tentacruel-sku262144.dts | 4 ++++ 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi b/arch= /arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi index 7c971198fa95..72a2a2bff0a9 100644 --- a/arch/arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola-krabby.dtsi @@ -71,14 +71,14 @@ &i2c1 { i2c-scl-internal-delay-ns =3D <10000>; =20 touchscreen: touchscreen@10 { - compatible =3D "hid-over-i2c"; + compatible =3D "elan,ekth6915"; reg =3D <0x10>; interrupts-extended =3D <&pio 12 IRQ_TYPE_LEVEL_LOW>; pinctrl-names =3D "default"; pinctrl-0 =3D <&touchscreen_pins>; - post-power-on-delay-ms =3D <10>; - hid-descr-addr =3D <0x0001>; - vdd-supply =3D <&pp3300_s3>; + reset-gpios =3D <&pio 60 GPIO_ACTIVE_LOW>; + vcc33-supply =3D <&pp3300_s3>; + no-reset-on-power-off; }; }; =20 diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola-tentacruel-sku2621= 44.dts b/arch/arm64/boot/dts/mediatek/mt8186-corsola-tentacruel-sku262144.d= ts index 26d3451a5e47..24d9ede63eaa 100644 --- a/arch/arm64/boot/dts/mediatek/mt8186-corsola-tentacruel-sku262144.dts +++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola-tentacruel-sku262144.dts @@ -42,3 +42,7 @@ MATRIX_KEY(0x00, 0x04, KEY_VOLUMEUP) CROS_STD_MAIN_KEYMAP >; }; + +&touchscreen { + compatible =3D "elan,ekth6a12nay"; +}; --=20 2.51.0.rc0.215.g125493bb4a-goog