exynos: Add support for spring

Spring is the first ARM-based HP Chromebook 11. It is similar to snow
and it uses the same Samsung Exynos5250 chip. But has some unusual
features. Mainline support for it has lagged snow (both in kernel and
U-Boot). Now that the exynos5 code is common we can support spring just
by adding a device tree and a few lines of configuration.

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

3 files changed, 595 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/exynos/Kconfig b/arch/arm/cpu/armv7/exynos/Kconfig
index 4a7d82f..37b89b0 100644
--- a/arch/arm/cpu/armv7/exynos/Kconfig
+++ b/arch/arm/cpu/armv7/exynos/Kconfig
@@ -51,6 +51,12 @@ config TARGET_SNOW
 	select OF_CONTROL
 	select SPL_DISABLE_OF_CONTROL
 
+config TARGET_SPRING
+	bool "Spring board"
+	select SUPPORT_SPL
+	select OF_CONTROL
+	select SPL_DISABLE_OF_CONTROL
+
 config TARGET_SMDK5420
 	bool "SMDK5420 board"
 	select SUPPORT_SPL
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index ba63553..2df957c 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -9,6 +9,7 @@ dtb-$(CONFIG_EXYNOS4) += exynos4210-origen.dtb \
 
 dtb-$(CONFIG_EXYNOS5) += exynos5250-arndale.dtb \
 	exynos5250-snow.dtb \
+	exynos5250-spring.dtb \
 	exynos5250-smdk5250.dtb \
 	exynos5420-smdk5420.dtb \
 	exynos5420-peach-pit.dtb \
diff --git a/arch/arm/dts/exynos5250-spring.dts b/arch/arm/dts/exynos5250-spring.dts
new file mode 100644
index 0000000..76d5323
--- /dev/null
+++ b/arch/arm/dts/exynos5250-spring.dts
@@ -0,0 +1,588 @@
+/*
+ * Google Spring board device tree source
+ *
+ * Copyright (c) 2013 Google, Inc
+ * Copyright (c) 2014 SUSE LINUX Products GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+/dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/input/input.h>
+#include "exynos5250.dtsi"
+
+/ {
+	model = "Google Spring";
+	compatible = "google,spring", "samsung,exynos5250", "samsung,exynos5";
+
+	aliases {
+		i2c0 = "/i2c@12C60000";
+		i2c1 = "/i2c@12C70000";
+		i2c2 = "/i2c@12C80000";
+		i2c3 = "/i2c@12C90000";
+		i2c4 = "/i2c@12CA0000";
+		i2c5 = "/i2c@12CB0000";
+		i2c6 = "/i2c@12CC0000";
+		i2c7 = "/i2c@12CD0000";
+		i2c104 = &cros_ec_ldo_tunnel;
+		spi0 = "/spi@12d20000";
+		spi1 = "/spi@12d30000";
+		spi2 = "/spi@12d40000";
+		spi3 = "/spi@131a0000";
+		spi4 = "/spi@131b0000";
+		mmc0 = "/mmc@12000000";
+		serial0 = "/serial@12C30000";
+		console = "/serial@12C30000";
+		i2s = "/sound@3830000";
+	};
+
+	memory {
+		reg = <0x40000000 0x80000000>;
+	};
+
+	flash@0 {
+		spl { /* spl size override */
+			size = <0x8000>;
+		};
+	};
+
+	chosen {
+		bootargs = "console=tty1";
+		stdout-path = "serial3:115200n8";
+	};
+
+	board-rev {
+		compatible = "google,board-revision";
+		google,board-rev-gpios = <&gpy4 0 0>, <&gpy4 1 0>,
+					 <&gpy4 2 0>;
+	};
+
+	mmc@12200000 {
+		samsung,bus-width = <8>;
+		samsung,timing = <1 3 3>;
+		samsung,removable = <0>;
+	};
+
+	mmc@12210000 {
+		status = "disabled";
+	};
+
+	mmc@12220000 {
+		/* MMC2 pins are used as GPIO for eDP bridge */
+		status = "disabled";
+	};
+
+	mmc@12230000 {
+		status = "disabled";
+	};
+
+	ehci@12110000 {
+		samsung,vbus-gpio = <&gpx1 1 GPIO_ACTIVE_HIGH>;
+		status = "okay";
+	};
+
+	xhci@12000000 {
+		samsung,vbus-gpio = <&gpx2 7 GPIO_ACTIVE_HIGH>;
+	};
+
+	spi@12d30000 {
+		spi-max-frequency = <50000000>;
+		firmware_storage_spi: flash@0 {
+			compatible = "spi-flash";
+			reg = <0>;
+		};
+	};
+
+	tmu@10060000 {
+		samsung,min-temp	= <25>;
+		samsung,max-temp	= <125>;
+		samsung,start-warning	= <95>;
+		samsung,start-tripping	= <105>;
+		samsung,hw-tripping	= <110>;
+		samsung,efuse-min-value	= <40>;
+		samsung,efuse-value	= <55>;
+		samsung,efuse-max-value	= <100>;
+		samsung,slope		= <274761730>;
+		samsung,dc-value	= <25>;
+	};
+
+	fimd@14400000 {
+		samsung,vl-freq = <60>;
+		samsung,vl-col = <1366>;
+		samsung,vl-row = <768>;
+		samsung,vl-width = <1366>;
+		samsung,vl-height = <768>;
+
+		samsung,vl-clkp;
+		samsung,vl-dp;
+		samsung,vl-hsp;
+		samsung,vl-vsp;
+
+		samsung,vl-bpix = <4>;
+
+		samsung,vl-hspw = <32>;
+		samsung,vl-hbpd = <80>;
+		samsung,vl-hfpd = <48>;
+		samsung,vl-vspw = <5>;
+		samsung,vl-vbpd = <14>;
+		samsung,vl-vfpd = <3>;
+		samsung,vl-cmd-allow-len = <0xf>;
+
+		samsung,winid = <0>;
+		samsung,interface-mode = <1>;
+		samsung,dp-enabled = <1>;
+		samsung,dual-lcd-enabled = <0>;
+	};
+
+	dp@145b0000 {
+		samsung,lt-status = <0>;
+
+		samsung,master-mode = <0>;
+		samsung,bist-mode = <0>;
+		samsung,bist-pattern = <0>;
+		samsung,h-sync-polarity = <0>;
+		samsung,v-sync-polarity = <0>;
+		samsung,interlaced = <0>;
+		samsung,color-space = <0>;
+		samsung,dynamic-range = <0>;
+		samsung,ycbcr-coeff = <0>;
+		samsung,color-depth = <1>;
+	};
+};
+
+&i2c_0 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <378000>;
+
+	s5m8767-pmic@66 {
+		compatible = "samsung,s5m8767-pmic";
+		reg = <0x66>;
+		interrupt-parent = <&gpx3>;
+		wakeup-source;
+
+		s5m8767,pmic-buck-dvs-gpios = <&gpd1 0 GPIO_ACTIVE_LOW>, /* DVS1 */
+		                              <&gpd1 1 GPIO_ACTIVE_LOW>, /* DVS2 */
+		                              <&gpd1 2 GPIO_ACTIVE_LOW>; /* DVS3 */
+
+		s5m8767,pmic-buck-ds-gpios = <&gpx2 3 GPIO_ACTIVE_LOW>, /* SET1 */
+		                             <&gpx2 4 GPIO_ACTIVE_LOW>, /* SET2 */
+		                             <&gpx2 5 GPIO_ACTIVE_LOW>; /* SET3 */
+
+		/*
+		 * The following arrays of DVS voltages are not used, since we are
+		 * not using GPIOs to control PMIC bucks, but they must be defined
+		 * to please the driver.
+		 */
+		s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>,
+		                                 <1250000>, <1200000>,
+		                                 <1150000>, <1100000>,
+		                                 <1000000>, <950000>;
+
+		s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>,
+		                                 <1100000>, <1100000>,
+		                                 <1000000>, <1000000>,
+		                                 <1000000>, <1000000>;
+
+		s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>,
+		                                 <1200000>, <1200000>,
+		                                 <1200000>, <1200000>,
+		                                 <1200000>, <1200000>;
+
+		clocks {
+			compatible = "samsung,s5m8767-clk";
+			#clock-cells = <1>;
+			clock-output-names = "en32khz_ap",
+			                     "en32khz_cp",
+			                     "en32khz_bt";
+		};
+
+		regulators {
+			ldo4_reg: LDO4 {
+				regulator-name = "P1.0V_LDO_OUT4";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				op_mode = <0>;
+			};
+
+			ldo5_reg: LDO5 {
+				regulator-name = "P1.8V_LDO_OUT5";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <0>;
+			};
+
+			ldo6_reg: LDO6 {
+				regulator-name = "vdd_mydp";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo7_reg: LDO7 {
+				regulator-name = "P1.1V_LDO_OUT7";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo8_reg: LDO8 {
+				regulator-name = "P1.0V_LDO_OUT8";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo10_reg: LDO10 {
+				regulator-name = "P1.8V_LDO_OUT10";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo11_reg: LDO11 {
+				regulator-name = "P1.8V_LDO_OUT11";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <0>;
+			};
+
+			ldo12_reg: LDO12 {
+				regulator-name = "P3.0V_LDO_OUT12";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo13_reg: LDO13 {
+				regulator-name = "P1.8V_LDO_OUT13";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <0>;
+			};
+
+			ldo14_reg: LDO14 {
+				regulator-name = "P1.8V_LDO_OUT14";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo15_reg: LDO15 {
+				regulator-name = "P1.0V_LDO_OUT15";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo16_reg: LDO16 {
+				regulator-name = "P1.8V_LDO_OUT16";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				op_mode = <3>;
+			};
+
+			ldo17_reg: LDO17 {
+				regulator-name = "P1.2V_LDO_OUT17";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				op_mode = <0>;
+			};
+
+			ldo25_reg: LDO25 {
+				regulator-name = "vdd_bridge";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				op_mode = <1>;
+			};
+
+			buck1_reg: BUCK1 {
+				regulator-name = "vdd_mif";
+				regulator-min-microvolt = <950000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <3>;
+			};
+
+			buck2_reg: BUCK2 {
+				regulator-name = "vdd_arm";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <3>;
+			};
+
+			buck3_reg: BUCK3 {
+				regulator-name = "vdd_int";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <3>;
+			};
+
+			buck4_reg: BUCK4 {
+				regulator-name = "vdd_g3d";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				op_mode = <3>;
+			};
+
+			buck5_reg: BUCK5 {
+				regulator-name = "P1.8V_BUCK_OUT5";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <1>;
+			};
+
+			buck6_reg: BUCK6 {
+				regulator-name = "P1.2V_BUCK_OUT6";
+				regulator-min-microvolt = <2050000>;
+				regulator-max-microvolt = <2050000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <0>;
+			};
+
+			buck9_reg: BUCK9 {
+				regulator-name = "vdd_ummc";
+				regulator-min-microvolt = <950000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
+				regulator-boot-on;
+				op_mode = <3>;
+			};
+		};
+	};
+};
+
+&i2c_1 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <378000>;
+};
+
+&i2c_2 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <66000>;
+};
+
+&i2c_3 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <66000>;
+};
+
+&i2c_4 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <66000>;
+	clock-frequency = <66000>;
+
+	cros_ec: embedded-controller {
+		compatible = "google,cros-ec-i2c";
+		reg = <0x1e>;
+		interrupts = <6 IRQ_TYPE_NONE>;
+		interrupt-parent = <&gpx1>;
+		wakeup-source;
+		u-boot,i2c-offset-len = <0>;
+		ec-interrupt = <&gpx1 6 GPIO_ACTIVE_LOW>;
+		cros_ec_ldo_tunnel: cros-ec-ldo-tunnel {
+			compatible = "google,cros-ec-ldo-tunnel";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			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 {
+					};
+				};
+			};
+		};
+	};
+};
+
+&i2c_5 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <66000>;
+};
+
+&i2c_7 {
+	status = "okay";
+	samsung,i2c-sda-delay = <100>;
+	samsung,i2c-max-bus-freq = <66000>;
+
+	ps8622-bridge@8 {
+		compatible = "parade,ps8622";
+		reg = <0x8>;
+		sleep-gpios = <&gpc3 6 GPIO_ACTIVE_LOW>;
+		reset-gpios = <&gpc3 1 GPIO_ACTIVE_LOW>;
+		hotplug-gpios = <&gpc3 0 GPIO_ACTIVE_HIGH>;
+		power-supply = <&ldo6_reg>;
+		parade,regs = /bits/ 8 <
+			0x02 0xa1 0x01 /* HPD low */
+			/*
+			 * SW setting: [1:0] SW output 1.2V voltage is
+			 * lower to 96%
+			 */
+			0x04 0x14 0x01
+			/* RCO SS setting: [5:4] = b01 0.5%, b10 1%, b11 1.5% */
+			0x04 0xe3 0x20
+			0x04 0xe2 0x80 /* [7] RCO SS enable */
+			/*
+			 * RPHY Setting: [3:2] CDR tune wait cycle before
+			 * measure for fine tune b00: 1us,
+			 * 01: 0.5us, 10:2us, 11:4us
+			 */
+			0x04 0x8a 0x0c
+			0x04 0x89 0x08 /* [3] RFD always on */
+			/*
+			 * CTN lock in/out: 20000ppm/80000ppm. Lock out 2 times
+			 */
+			0x04 0x71 0x2d
+			/* 2.7G CDR settings */
+			0x04 0x7d 0x07 /* NOF=40LSB for HBR CDR setting */
+			0x04 0x7b 0x00 /* [1:0] Fmin=+4bands */
+			0x04 0x7a 0xfd /* [7:5] DCO_FTRNG=+-40% */
+			/*
+			 * 1.62G CDR settings:
+			 * [5:2]NOF=64LSB [1:0]DCO scale is 2/5
+			 */
+			0x04 0xc0 0x12
+			0x04 0xc1 0x92 /* Gitune=-37% */
+			0x04 0xc2 0x1c /* Fbstep=100% */
+			0x04 0x32 0x80 /* [7] LOS signal disable */
+			/* RPIO Setting */
+			/* [7:4] LVDS driver bias current 75% (250mV swing) */
+			0x04 0x00 0xb0
+			 /* [7:6] Right-bar GPIO output strength is 8mA */
+			0x04 0x15 0x40
+			/* EQ Training State Machine Setting */
+			0x04 0x54 0x10 /* RCO calibration start */
+			/* [4:0] MAX_LANE_COUNT set to one lane */
+			0x01 0x02 0x81
+			/* [4:0] LANE_COUNT_SET set to one lane */
+			0x01 0x21 0x81
+			0x00 0x52 0x20
+			0x00 0xf1 0x03 /* HPD CP toggle enable */
+			0x00 0x62 0x41
+			/* Counter number add 1ms counter delay */
+			0x00 0xf6 0x01
+			/*
+			 * [6]PWM function control by DPCD0040f[7], default
+			 * is PWM block always works
+			 */
+			0x00 0x77 0x06
+			0x00 0x4c 0x04
+			/*
+			 * 04h Adjust VTotal tolerance to fix the 30Hz no-
+			 * display issue
+			 * DPCD00400='h00 Parade OUI = 'h001cf8
+			 */
+			0x01 0xc0 0x00
+			0x01 0xc1 0x1c /* DPCD00401='h1c */
+			0x01 0xc2 0xf8 /* DPCD00402='hf8 */
+			/* DPCD403~408 = ASCII code D2SLV5='h4432534c5635 */
+			0x01 0xc3 0x44
+			0x01 0xc4 0x32 /* DPCD404 */
+			0x01 0xc5 0x53 /* DPCD405 */
+			0x01 0xc6 0x4c /* DPCD406 */
+			0x01 0xc7 0x56 /* DPCD407 */
+			0x01 0xc8 0x35 /* DPCD408 */
+			/* DPCD40A Initial Code major revision '01' */
+			0x01 0xca 0x01
+			/* DPCD40B Initial Code minor revision '05' */
+			0x01 0xcb 0x05
+			0x01 0xa5 0xa0 /* DPCD720, Select internal PWM */
+			/*
+			 * 0xff for 100% PWM of brightness, 0h for 0% brightness
+			 */
+			0x01 0xa7 0x00
+			/*
+			 * Set LVDS output as 6bit-VESA mapping, single LVDS
+			 * channel
+			 */
+			0x01 0xcc 0x13
+			0x02 0xb1 0x20 /* Enable SSC set by register */
+			/* Set SSC enabled and +/-1% central spreading */
+			0x04 0x10 0x16
+			0x04 0x59 0x60 /* MPU Clock source: LC => RCO */
+			0x04 0x54 0x14 /* LC -> RCO */
+			0x02 0xa1 0x91>; /* HPD high */
+	};
+
+	soundcodec@20 {
+		reg = <0x20>;
+		compatible = "maxim,max98088-codec";
+	};
+};
+
+#include "cros-ec-keyboard.dtsi"