arm64: dts: qcom: sm8450-nagara: Add Samsung touchscreen

Add device node and required pinctrl settings (as well as a fixup for
an existing one, whoops!) to support the Samsung Electronics
touchscreen on Nagara devices.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221114095654.34561-4-konrad.dybcio@linaro.org

diff --git a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
index 0d8d151..3825622 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
@@ -435,7 +435,22 @@
        status = "okay";
 };
 
-/* I2C4 is used, it hosts a Samsung touchscreen, but GPI DMA is broken.. */
+&i2c4 {
+       clock-frequency = <400000>;
+       status = "okay";
+
+       touchscreen@48 {
+               compatible = "samsung,s6sy761";
+               reg = <0x48>;
+               interrupt-parent = <&tlmm>;
+               interrupts = <21 0x2008>;
+               vdd-supply = <&pm8350c_l2>;
+               avdd-supply = <&pm8350c_l3>;
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&ts_reset_default &ts_int_default>;
+       };
+};
 
 &i2c5 {
        clock-frequency = <400000>;
@@ -566,8 +581,16 @@
 &tlmm {
        gpio-reserved-ranges = <28 4>;
 
+       ts_reset_default: ts-reset-default-state {
+               pins = "gpio20";
+               function = "gpio";
+               drive-strength = <2>;
+               bias-disable;
+               output-high;
+       };
+
        ts_int_default: ts-int-default-state {
-               pins = "gpio23";
+               pins = "gpio21";
                function = "gpio";
                drive-strength = <2>;
                bias-disable;