Received-SPF: pass (google.com: domain of linux-kernel+bounces-155302-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1;
From: Johan Hovold <johan+linaro@kernel.org>
To: Jiri Kosina <jikos@kernel.org>,
	Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Douglas Anderson <dianders@chromium.org>,
	linux-input@vger.kernel.org,
	devicetree@vger.kernel.org,
	linux-arm-msm@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Johan Hovold <johan+linaro@kernel.org>,
	stable@vger.kernel.org
Subject: [PATCH 5/6] arm64: dts: qcom: sc8280xp-x13s: fix touchscreen power on
Date: Tue, 23 Apr 2024 15:46:10 +0200
Message-ID: <20240423134611.31979-6-johan+linaro@kernel.org>
In-Reply-To: <20240423134611.31979-1-johan+linaro@kernel.org>
References: <20240423134611.31979-1-johan+linaro@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

The Elan eKTH5015M touch controller on the X13s requires a 300 ms delay
before sending commands after having deasserted reset during power on.

Switch to the Elan specific binding so that the OS can determine the
required power-on sequence and make sure that the controller is always
detected during boot.

Note that the always-on 1.8 V supply (s10b) is not used by the
controller directly and should not be described.

Fixes: 32c231385ed4 ("arm64: dts: qcom: sc8280xp: add Lenovo Thinkpad X13s devicetree")
Cc: stable@vger.kernel.org	# 6.0
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 .../dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
index b220ba4fba23..e27c8a21125c 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -674,15 +674,16 @@ &i2c4 {
 
 	status = "okay";
 
-	/* FIXME: verify */
 	touchscreen@10 {
-		compatible = "hid-over-i2c";
+		compatible = "elan,ekth5015m", "elan,ekth6915";
 		reg = <0x10>;
 
-		hid-descr-addr = <0x1>;
 		interrupts-extended = <&tlmm 175 IRQ_TYPE_LEVEL_LOW>;
-		vdd-supply = <&vreg_misc_3p3>;
-		vddl-supply = <&vreg_s10b>;
+		reset-gpios = <&tlmm 99 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;
+		no-reset-on-power-off;
+
+		vcc33-supply = <&vreg_misc_3p3>;
+		vccio-supply = <&vreg_misc_3p3>;
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&ts0_default>;
@@ -1637,8 +1638,8 @@ int-n-pins {
 		reset-n-pins {
 			pins = "gpio99";
 			function = "gpio";
-			output-high;
-			drive-strength = <16>;
+			drive-strength = <2>;
+			bias-disable;
 		};
 	};
 
-- 
2.43.2