[PATCH 6/7] arm64: dts: exynos: gs101-raven: add S6SY791 touchscreen

[Lukas Timmermann]

Configure USI11 as SPI controller and add the S6SY791 touchscreen with
its supplies, reset and interrupt lines.

The touch SPI bus can be muxed between the AP and the AOC coprocessor
via TS_SPI_SEL (gpp26-1). Hog it low so the AP owns the bus.

Signed-off-by: Lukas Timmermann <foss at timmermann.space>
---
 arch/arm64/boot/dts/exynos/google/gs101-raven.dts | 50 +++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101-raven.dts b/arch/arm64/boot/dts/exynos/google/gs101-raven.dts
index 7c4273796a22..02b19e39055a 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101-raven.dts
+++ b/arch/arm64/boot/dts/exynos/google/gs101-raven.dts
@@ -47,3 +47,53 @@ &framebuffer0 {
 
 	status = "okay";
 };
+
+&gpp26 {
+	/* TS_SPI_SEL: low = AP owns the touch SPI bus, high = AOC */
+	ts-spi-sel-hog {
+		gpio-hog;
+		gpios = <1 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "ts-spi-sel";
+	};
+};
+
+&pinctrl_gpio_alive {
+	ts_irq: ts-irq-pins {
+		samsung,pins = "gpa9-0";
+		samsung,pin-function = <GS101_PIN_FUNC_EINT>;
+		samsung,pin-pud = <GS101_PIN_PULL_NONE>;
+		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
+	};
+};
+
+&spi_11 {
+	cs-gpios = <&gpp23 3 GPIO_ACTIVE_LOW>;
+	num-cs = <1>;
+	pinctrl-0 = <&spi11_bus &spi11_cs>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	touchscreen at 0 {
+		compatible = "samsung,s6sy791";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+		spi-cpol;
+		spi-cpha;
+
+		interrupt-parent = <&gpa9>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-0 = <&ts_irq>;
+		pinctrl-names = "default";
+
+		reset-gpios = <&gpp26 0 GPIO_ACTIVE_LOW>;
+
+		vdd-supply = <&s2mpg10_ldo25m>;
+		avdd-supply = <&s2mpg10_ldo26m>;
+	};
+};
+
+&usi11 {
+	samsung,mode = <USI_MODE_SPI>;
+	status = "okay";
+};

-- 
2.56.0