exynos: dts: Support EC tunnel and main TPS65090 regulator

On pit and pi the TPS65090 regulator is connected only to the EC and we
must use a tunnel to get to it. The existing U-Boot support relies on a
special driver. Add a tunnel definition so that the new device-model
TPS65090 driver can be used unmodified.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 297 insertions, 48 deletions

diff --git a/arch/arm/dts/exynos5250-snow.dts b/arch/arm/dts/exynos5250-snow.dts
index 06d675b..653efb4 100644
--- a/arch/arm/dts/exynos5250-snow.dts
+++ b/arch/arm/dts/exynos5250-snow.dts
@@ -25,6 +25,7 @@
 		i2c2 = "/i2c@12C80000";
 		i2c3 = "/i2c@12C90000";
 		i2c4 = "/i2c@12CA0000";
+		i2c104 = &i2c_104;
 		i2c5 = "/i2c@12CB0000";
 		i2c6 = "/i2c@12CC0000";
 		i2c7 = "/i2c@12CD0000";
@@ -43,7 +44,7 @@
 	};
 
 	i2c4: i2c@12CA0000 {
-		cros_ec: cros-ec@1e {
+		cros_ec_old: cros-ec@1e {
 			reg = <0x1e>;
 			compatible = "google,cros-ec-i2c";
 			i2c-max-frequency = <100000>;
@@ -57,6 +58,101 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arb-gpio-challenge";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		our-claim-gpio = <&gpf0 3 GPIO_ACTIVE_LOW>;
+		their-claim-gpios = <&gpe0 4 GPIO_ACTIVE_LOW>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c@0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			battery: sbs-battery@b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
+
+			cros_ec: embedded-controller {
+				compatible = "google,cros-ec-i2c";
+				reg = <0x1e>;
+				interrupts = <6 IRQ_TYPE_NONE>;
+				interrupt-parent = <&gpx1>;
+				wakeup-source;
+				i2c-max-frequency = <100000>;
+				u-boot,i2c-offset-len = <0>;
+				ec-interrupt = <&gpx1 6 GPIO_ACTIVE_LOW>;
+			};
+
+			power-regulator {
+				compatible = "ti,tps65090";
+				reg = <0x48>;
+
+				regulators {
+					dcdc1 {
+						ti,enable-ext-control;
+					};
+					dcdc2 {
+						ti,enable-ext-control;
+					};
+					dcdc3 {
+						ti,enable-ext-control;
+					};
+					fet1: fet1 {
+						regulator-name = "vcd_led";
+						ti,overcurrent-wait = <3>;
+					};
+					tps65090_fet2: fet2 {
+						regulator-name = "video_mid";
+						regulator-always-on;
+						ti,overcurrent-wait = <3>;
+					};
+					fet3 {
+						regulator-name = "wwan_r";
+						regulator-always-on;
+						ti,overcurrent-wait = <3>;
+					};
+					fet4 {
+						regulator-name = "sdcard";
+						ti,overcurrent-wait = <3>;
+					};
+					fet5 {
+						regulator-name = "camout";
+						regulator-always-on;
+						ti,overcurrent-wait = <3>;
+					};
+					fet6: fet6 {
+						regulator-name = "lcd_vdd";
+						ti,overcurrent-wait = <3>;
+					};
+					tps65090_fet7: fet7 {
+						regulator-name = "video_mid_1a";
+						regulator-always-on;
+						ti,overcurrent-wait = <3>;
+					};
+					ldo1 {
+					};
+					ldo2 {
+					};
+				};
+
+				charger {
+					compatible = "ti,tps65090-charger";
+				};
+			};
+		};
+	};
+
 	spi@12d30000 {
 		spi-max-frequency = <50000000>;
 		firmware_storage_spi: flash@0 {
diff --git a/arch/arm/dts/exynos5420-peach-pit.dts b/arch/arm/dts/exynos5420-peach-pit.dts
index 0f1002e..5182b2b 100644
--- a/arch/arm/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/dts/exynos5420-peach-pit.dts
@@ -26,6 +26,7 @@
 		serial0 = "/serial@12C30000";
 		console = "/serial@12C30000";
 		pmic = "/i2c@12CA0000";
+		i2c104 = &i2c_tunnel;
 	};
 
 	dmc {
@@ -101,30 +102,6 @@
 		};
 	};
 
-	spi@12d40000 { /* spi2 */
-		spi-max-frequency = <4000000>;
-		spi-deactivate-delay = <200>;
-
-		cros_ec: cros-ec@0 {
-			compatible = "google,cros-ec-spi";
-			reg = <0>;
-			spi-half-duplex;
-			spi-max-timeout-ms = <1100>;
-			ec-interrupt = <&gpx1 5 GPIO_ACTIVE_LOW>;
-
-			/*
-			 * This describes the flash memory within the EC. Note
-			 * that the STM32L flash erases to 0, not 0xff.
-			 */
-			#address-cells = <1>;
-			#size-cells = <1>;
-			flash@8000000 {
-				reg = <0x08000000 0x20000>;
-				erase-value = <0>;
-			};
-		};
-	};
-
 	xhci@12000000 {
 		samsung,vbus-gpio = <&gph0 0 GPIO_ACTIVE_HIGH>;
 	};
@@ -159,4 +136,103 @@
 	};
 };
 
+&spi_2 {
+	spi-max-frequency = <3125000>;
+	spi-deactivate-delay = <200>;
+	status = "okay";
+	num-cs = <1>;
+	samsung,spi-src-clk = <0>;
+	cs-gpios = <&gpb1 2 0>;
+
+	cros_ec: cros-ec@0 {
+		compatible = "google,cros-ec-spi";
+		interrupt-parent = <&gpx1>;
+		interrupts = <5 0>;
+		reg = <0>;
+		spi-half-duplex;
+		spi-max-timeout-ms = <1100>;
+		ec-interrupt = <&gpx1 5 GPIO_ACTIVE_LOW>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/*
+		 * This describes the flash memory within the EC. Note
+		 * that the STM32L flash erases to 0, not 0xff.
+		 */
+		flash@8000000 {
+			reg = <0x08000000 0x20000>;
+			erase-value = <0>;
+		};
+
+		controller-data {
+			samsung,spi-feedback-delay = <1>;
+		};
+
+		i2c_tunnel: i2c-tunnel {
+			compatible = "google,cros-ec-i2c-tunnel";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			google,remote-bus = <0>;
+
+			battery: sbs-battery@b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+				sbs,i2c-retry-count = <2>;
+			};
+
+			power-regulator@48 {
+				compatible = "ti,tps65090";
+				reg = <0x48>;
+
+				regulators {
+					tps65090_dcdc1: dcdc1 {
+						ti,enable-ext-control;
+					};
+					tps65090_dcdc2: dcdc2 {
+						ti,enable-ext-control;
+					};
+					tps65090_dcdc3: dcdc3 {
+						ti,enable-ext-control;
+					};
+					tps65090_fet1: fet1 {
+						regulator-name = "vcd_led";
+					};
+					tps65090_fet2: fet2 {
+						regulator-name = "video_mid";
+						regulator-always-on;
+					};
+					tps65090_fet3: fet3 {
+						regulator-name = "wwan_r";
+						regulator-always-on;
+					};
+					tps65090_fet4: fet4 {
+						regulator-name = "sdcard";
+						regulator-always-on;
+					};
+					tps65090_fet5: fet5 {
+						regulator-name = "camout";
+						regulator-always-on;
+					};
+					tps65090_fet6: fet6 {
+						regulator-name = "lcd_vdd";
+					};
+					tps65090_fet7: fet7 {
+						regulator-name = "video_mid_1a";
+						regulator-always-on;
+					};
+					tps65090_ldo1: ldo1 {
+					};
+					tps65090_ldo2: ldo2 {
+					};
+				};
+
+				charger {
+					compatible = "ti,tps65090-charger";
+				};
+			};
+		};
+	};
+};
+
 #include "cros-ec-keyboard.dtsi"
diff --git a/arch/arm/dts/exynos5800-peach-pi.dts b/arch/arm/dts/exynos5800-peach-pi.dts
index 4e548f7..600c294 100644
--- a/arch/arm/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/dts/exynos5800-peach-pi.dts
@@ -26,6 +26,7 @@
 		serial0 = "/serial@12C30000";
 		console = "/serial@12C30000";
 		pmic = "/i2c@12CA0000";
+		i2c104 = &i2c_tunnel;
 	};
 
 	dmc {
@@ -93,29 +94,6 @@
 		};
 	};
 
-	spi@12d40000 { /* spi2 */
-		spi-max-frequency = <4000000>;
-		spi-deactivate-delay = <200>;
-		cros_ec: cros-ec@0 {
-			compatible = "google,cros-ec-spi";
-			reg = <0>;
-			spi-half-duplex;
-			spi-max-timeout-ms = <1100>;
-			ec-interrupt = <&gpx1 5 GPIO_ACTIVE_LOW>;
-
-			/*
-			 * This describes the flash memory within the EC. Note
-			 * that the STM32L flash erases to 0, not 0xff.
-			 */
-			#address-cells = <1>;
-			#size-cells = <1>;
-			flash@8000000 {
-				reg = <0x08000000 0x20000>;
-				erase-value = <0>;
-			};
-		};
-	};
-
 	xhci@12000000 {
 		samsung,vbus-gpio = <&gph0 0 GPIO_ACTIVE_HIGH>;
 	};
@@ -153,4 +131,103 @@
 	};
 };
 
+&spi_2 {
+	spi-max-frequency = <3125000>;
+	spi-deactivate-delay = <200>;
+	status = "okay";
+	num-cs = <1>;
+	samsung,spi-src-clk = <0>;
+	cs-gpios = <&gpb1 2 0>;
+
+	cros_ec: cros-ec@0 {
+		compatible = "google,cros-ec-spi";
+		interrupt-parent = <&gpx1>;
+		interrupts = <5 0>;
+		reg = <0>;
+		spi-half-duplex;
+		spi-max-timeout-ms = <1100>;
+		ec-interrupt = <&gpx1 5 GPIO_ACTIVE_LOW>;
+
+		/*
+		 * This describes the flash memory within the EC. Note
+		 * that the STM32L flash erases to 0, not 0xff.
+		 */
+		#address-cells = <1>;
+		#size-cells = <1>;
+		flash@8000000 {
+			reg = <0x08000000 0x20000>;
+			erase-value = <0>;
+		};
+
+		controller-data {
+			samsung,spi-feedback-delay = <1>;
+		};
+
+		i2c_tunnel: i2c-tunnel {
+			compatible = "google,cros-ec-i2c-tunnel";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			google,remote-bus = <0>;
+
+			battery: sbs-battery@b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+				sbs,i2c-retry-count = <2>;
+			};
+
+			power-regulator@48 {
+				compatible = "ti,tps65090";
+				reg = <0x48>;
+
+				regulators {
+					tps65090_dcdc1: dcdc1 {
+						ti,enable-ext-control;
+					};
+					tps65090_dcdc2: dcdc2 {
+						ti,enable-ext-control;
+					};
+					tps65090_dcdc3: dcdc3 {
+						ti,enable-ext-control;
+					};
+					tps65090_fet1: fet1 {
+						regulator-name = "vcd_led";
+					};
+					tps65090_fet2: fet2 {
+						regulator-name = "video_mid";
+						regulator-always-on;
+					};
+					tps65090_fet3: fet3 {
+						regulator-name = "wwan_r";
+						regulator-always-on;
+					};
+					tps65090_fet4: fet4 {
+						regulator-name = "sdcard";
+						regulator-always-on;
+					};
+					tps65090_fet5: fet5 {
+						regulator-name = "camout";
+						regulator-always-on;
+					};
+					tps65090_fet6: fet6 {
+						regulator-name = "lcd_vdd";
+					};
+					tps65090_fet7: fet7 {
+						regulator-name = "video_mid_1a";
+						regulator-always-on;
+					};
+					tps65090_ldo1: ldo1 {
+					};
+					tps65090_ldo2: ldo2 {
+					};
+				};
+
+				charger {
+					compatible = "ti,tps65090-charger";
+				};
+			};
+		};
+	};
+};
+
 #include "cros-ec-keyboard.dtsi"