From: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Date: Wed, 29 Jun 2022 15:59:48 +0000 (-0400)
Subject: arm64: dts: mediatek: asurada: Add I2C touchscreen
X-Git-Tag: v6.6.17~6969^2~27^2~22
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cbd4af081a216025dd5c8a8f6a653c47c8a02353;p=platform%2Fkernel%2Flinux-rpi.git

arm64: dts: mediatek: asurada: Add I2C touchscreen

All machines of the Asurada platform have a touchscreen at address 0x10
in the I2C0 bus, but the devices vary: Spherion has the Elan eKTH3500
touchscreen, while Hayato has a generic HID-over-i2c touchscreen.

Add common support for the touchscreens on the platform and the
specifics in each board file.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220629155956.1138955-12-nfraprado@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
---

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts b/arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts
index ca18fcf..1e91491 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts
@@ -38,3 +38,10 @@
 		CROS_STD_MAIN_KEYMAP
 	>;
 };
+
+&touchscreen {
+	compatible = "hid-over-i2c";
+	post-power-on-delay-ms = <10>;
+	hid-descr-addr = <0x0001>;
+	vdd-supply = <&pp3300_u>;
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
index 30b0389..42db81e9 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
@@ -40,3 +40,7 @@
 		CROS_STD_MAIN_KEYMAP
 	>;
 };
+
+&touchscreen {
+	compatible = "elan,ekth3500";
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 4de4235..6eace28 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -92,6 +92,13 @@
 	clock-frequency = <400000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c0_pins>;
+
+	touchscreen: touchscreen@10 {
+		reg = <0x10>;
+		interrupts-extended = <&pio 21 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&touchscreen_pins>;
+	};
 };
 
 &i2c1 {
@@ -454,6 +461,24 @@
 			bias-pull-up = <MTK_PUPD_SET_R1R0_11>;
 		};
 	};
+
+	touchscreen_pins: touchscreen-default-pins {
+		pins-irq {
+			pinmux = <PINMUX_GPIO21__FUNC_GPIO21>;
+			input-enable;
+			bias-pull-up;
+		};
+
+		pins-reset {
+			pinmux = <PINMUX_GPIO137__FUNC_GPIO137>;
+			output-high;
+		};
+
+		pins-report-sw {
+			pinmux = <PINMUX_GPIO138__FUNC_GPIO138>;
+			output-low;
+		};
+	};
 };
 
 &spi1 {