Add support for the ChromeOS Embedded Controller present on the Asurada
platform. It is connected through the SPI1 bus and offers several
functionalities: base detection, PWM controller, I2C tunneling,
regulators, Type-C connector management, keyboard and Smart Battery
Metrics (SBS).

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>

---

(no changes since v2)

Changes in v2:
- Renamed PWM subnode to avoid dt-binding warning (ec-pwm -> pwm)

 .../boot/dts/mediatek/mt8192-asurada.dtsi     | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 72dc974fe6fc..07405dea4d9d 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -353,6 +353,14 @@ &pio {
 			  "AUD_DAT_MISO0",
 			  "AUD_DAT_MISO1";
 
+	cros_ec_int: cros-ec-irq-default-pins {
+		pins-ec-ap-int-odl {
+			pinmux = <PINMUX_GPIO5__FUNC_GPIO5>;
+			input-enable;
+			bias-pull-up;
+		};
+	};
+
 	i2c0_pins: i2c0-default-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO204__FUNC_SCL0>,
@@ -428,6 +436,74 @@ &spi1 {
 	mediatek,pad-select = <0>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi1_pins>;
+
+	cros_ec: ec@0 {
+		compatible = "google,cros-ec-spi";
+		reg = <0>;
+		interrupts-extended = <&pio 5 IRQ_TYPE_LEVEL_LOW>;
+		spi-max-frequency = <3000000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&cros_ec_int>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		base_detection: cbas {
+			compatible = "google,cros-cbas";
+		};
+
+		cros_ec_pwm: pwm {
+			compatible = "google,cros-ec-pwm";
+			#pwm-cells = <1>;
+
+			status = "disabled";
+		};
+
+		i2c_tunnel: i2c-tunnel {
+			compatible = "google,cros-ec-i2c-tunnel";
+			google,remote-bus = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		mt6360_ldo3_reg: regulator@0 {
+			compatible = "google,cros-ec-regulator";
+			reg = <0>;
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <3300000>;
+		};
+
+		mt6360_ldo5_reg: regulator@1 {
+			compatible = "google,cros-ec-regulator";
+			reg = <1>;
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+		};
+
+		typec {
+			compatible = "google,cros-ec-typec";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			usb_c0: connector@0 {
+				compatible = "usb-c-connector";
+				reg = <0>;
+				label = "left";
+				power-role = "dual";
+				data-role = "host";
+				try-power-role = "source";
+			};
+
+			usb_c1: connector@1 {
+				compatible = "usb-c-connector";
+				reg = <1>;
+				label = "right";
+				power-role = "dual";
+				data-role = "host";
+				try-power-role = "source";
+			};
+		};
+	};
 };
 
 &spi5 {
@@ -442,3 +518,6 @@ &spi5 {
 &uart0 {
 	status = "okay";
 };
+
+#include <arm/cros-ec-keyboard.dtsi>
+#include <arm/cros-ec-sbs.dtsi>
-- 
2.36.1