linux-kernel - [RFT PATCH 6/6] arm64: dts: qcom: sm6375-pdx225: add fixed touchscreen AVDD regulator

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Date:   Sat, 11 Nov 2023 17:42:29 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [RFT PATCH 6/6] arm64: dts: qcom: sm6375-pdx225: add fixed touchscreen AVDD regulator

The Samsung S6SY761 touchscreen bindings expect AVDD regulator which is
missing in the Sony Xperia PDX225 DTS.  There is however pinctrl setting
for in the touchscreen device node with similar name: "avdd", so assume
author wanted to control a fixed regulator with a GPIO.

This fixes dtbs_check warning:

  sm6375-sony-xperia-murray-pdx225.dtb: touchscreen@48: 'avdd-supply' is a required property

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Not tested on HW.

Bindings for touchscreen:
https://lore.kernel.org/linux-devicetree/20231111-mothball-diploma-c034c0622bc6@squawk/T/#t
---
 .../dts/qcom/sm6375-sony-xperia-murray-pdx225.dts  | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm6375-sony-xperia-murray-pdx225.dts b/arch/arm64/boot/dts/qcom/sm6375-sony-xperia-murray-pdx225.dts
index 0ce4fa8de8b0..cca2c2eb88ad 100644
--- a/arch/arm64/boot/dts/qcom/sm6375-sony-xperia-murray-pdx225.dts
+++ b/arch/arm64/boot/dts/qcom/sm6375-sony-xperia-murray-pdx225.dts
@@ -80,6 +80,15 @@ ramoops@...40000 {
 		};
 	};
 
+	touch_avdd: touch-avdd-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "touch_avdd";
+		gpio = <&tlmm 59 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_avdd_default>;
+		enable-active-high;
+	};
+
 	vph_pwr: vph-pwr-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
@@ -136,9 +145,10 @@ touchscreen@48 {
 		interrupts = <22 0x2008>;
 
 		vdd-supply = <&pm6125_l13>;
+		avdd-supply = <&touch_avdd>;
 
 		pinctrl-names = "default";
-		pinctrl-0 = <&ts_int_default &ts_avdd_default>;
+		pinctrl-0 = <&ts_int_default>;
 	};
 };
 
@@ -417,7 +427,7 @@ ts_avdd_default: ts-avdd-default-state {
 		pins = "gpio59";
 		function = "gpio";
 		drive-strength = <8>;
-		output-high;
+		output-low;
 	};
 };
 
-- 
2.34.1