arm: tegra: initial support for apalis tk1

This patch adds board support for the Toradex Apalis TK1 a computer on
module which can be used on different carrier boards.

For the sake of ease of use we do not distinguish between different
carrier boards for now as the base module features are deemed
sufficient enough for regular booting.

The following functionality is working so far:
- eMMC boot and environment storage
- Gigabit Ethernet (link detection still rather flaky)
- MMC/SD cards (both MMC1 as well as SD1 slot however the later one
  without card detect)
- USB client/host (dual role port as client e.g. for DFU/UMS, other two
  ports as host)

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>

3 files changed, 380 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 58741f0a0de..7558f1ba2d0 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -31,6 +31,7 @@ dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 	tegra30-colibri.dtb \
 	tegra30-tec-ng.dtb \
 	tegra114-dalmore.dtb \
+	tegra124-apalis.dtb \
 	tegra124-jetson-tk1.dtb \
 	tegra124-nyan-big.dtb \
 	tegra124-venice2.dtb
diff --git a/arch/arm/dts/tegra124-apalis.dts b/arch/arm/dts/tegra124-apalis.dts
new file mode 100644
index 00000000000..f18ca72123f
--- /dev/null
+++ b/arch/arm/dts/tegra124-apalis.dts
@@ -0,0 +1,375 @@
+/dts-v1/;
+
+#include "tegra124.dtsi"
+
+/ {
+	model = "Toradex Apalis TK1";
+	compatible = "toradex,apalis_tk1", "nvidia,tegra124";
+
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		i2c0 = "/i2c@7000d000";
+		i2c1 = "/i2c@7000c000";
+		i2c2 = "/i2c@7000c400";
+		i2c3 = "/i2c@7000c500";
+		sdhci0 = "/sdhci@700b0600";
+		sdhci1 = "/sdhci@700b0000";
+		sdhci2 = "/sdhci@700b0400";
+		spi0 = "/spi@7000d400";
+		spi1 = "/spi@7000da00";
+		spi2 = "/spi@7000d600";
+		usb0 = "/usb@7d000000";
+		usb1 = "/usb@7d004000";
+		usb2 = "/usb@7d008000";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x80000000>;
+	};
+
+	pcie-controller@01003000 {
+		status = "okay";
+
+		avddio-pex-supply = <&vdd_1v05>;
+		dvddio-pex-supply = <&vdd_1v05>;
+		avdd-pex-pll-supply = <&vdd_1v05>;
+		hvdd-pex-supply = <&sys_3v3_reg>;
+		hvdd-pex-pll-e-supply = <&sys_3v3_reg>;
+		vddio-pex-ctl-supply = <&sys_3v3_reg>;
+		avdd-pll-erefe-supply = <&avdd_1v05>;
+
+		/* I210 Gigabit Ethernet Controller (on-module) */
+		pci@2,0 {
+			status = "okay";
+		};
+	};
+
+	/*
+	 * GEN1_I2C: I2C1_SDA/SCL on MXM3 pin 209/211 (e.g. RTC on carrier
+	 * board)
+	 */
+	i2c@7000c000 {
+		status = "okay";
+		clock-frequency = <100000>;
+	};
+
+	/*
+	 * GEN2_I2C: I2C2_SDA/SCL (DDC) on MXM3 pin 205/207 (e.g. display EDID)
+	 */
+	hdmi_ddc: i2c@7000c400 {
+		status = "okay";
+		clock-frequency = <100000>;
+	};
+
+	/*
+	 * CAM_I2C: I2C3_SDA/SCL (CAM) on MXM3 pin 201/203 (e.g. camera sensor
+	 * on carrier board)
+	 */
+	i2c@7000c500 {
+		status = "okay";
+		clock-frequency = <100000>;
+	};
+
+	/* I2C4 (DDC): unused */
+
+	/* PWR_I2C: power I2C to audio codec, PMIC and temperature sensor */
+	i2c@7000d000 {
+		status = "okay";
+		clock-frequency = <400000>;
+
+		pmic: pmic@40 {
+			compatible = "ams,as3722";
+			reg = <0x40>;
+			interrupts = <0 86 IRQ_TYPE_LEVEL_HIGH>;
+
+			ams,system-power-controller;
+
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			gpio-controller;
+			#gpio-cells = <2>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&as3722_default>;
+
+			as3722_default: pinmux {
+				/* gpio2: PWR_EN_+V3.3 */
+
+				/* gpio7: +V1.6_LPO */
+
+				gpio1_2_4_7 {
+					pins = "gpio1", "gpio2", "gpio4", "gpio7";
+					function = "gpio";
+					bias-pull-up;
+				};
+
+				gpio3_5_6 {
+					pins = "gpio3", "gpio5", "gpio6";
+					bias-high-impedance;
+				};
+			};
+
+			regulators {
+				vsup-sd2-supply = <&sys_3v3_reg>;
+				vsup-sd3-supply = <&sys_3v3_reg>;
+				vsup-sd4-supply = <&sys_3v3_reg>;
+				vsup-sd5-supply = <&sys_3v3_reg>;
+				vin-ldo0-supply = <&vddio_ddr_1v35>;
+				vin-ldo1-6-supply = <&sys_3v3_reg>;
+				vin-ldo2-5-7-supply = <&vddio_1v8>;
+				vin-ldo3-4-supply = <&sys_3v3_reg>;
+				vin-ldo9-10-supply = <&sys_3v3_reg>;
+				vin-ldo11-supply = <&sys_3v3_reg>;
+
+				vdd_cpu: sd0 {
+					regulator-name = "+VDD_CPU_AP";
+					regulator-min-microvolt = <700000>;
+					regulator-max-microvolt = <1400000>;
+					regulator-min-microamp = <3500000>;
+					regulator-max-microamp = <3500000>;
+					regulator-always-on;
+					regulator-boot-on;
+					ams,ext-control = <2>;
+				};
+
+				sd1 {
+					regulator-name = "+VDD_CORE";
+					regulator-min-microvolt = <700000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-min-microamp = <2500000>;
+					regulator-max-microamp = <2500000>;
+					regulator-always-on;
+					regulator-boot-on;
+					ams,ext-control = <1>;
+				};
+
+				vddio_ddr_1v35: sd2 {
+					regulator-name = "+V1.35_VDDIO_DDR(sd2)";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				sd3 {
+					regulator-name = "+V1.35_VDDIO_DDR(sd3)";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				vdd_1v05: sd4 {
+					regulator-name = "+V1.05";
+					regulator-min-microvolt = <1050000>;
+					regulator-max-microvolt = <1050000>;
+				};
+
+				vddio_1v8: sd5 {
+					regulator-name = "+V1.8";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				vdd_gpu: sd6 {
+					regulator-name = "+VDD_GPU_AP";
+					regulator-min-microvolt = <650000>;
+					regulator-max-microvolt = <1200000>;
+					regulator-min-microamp = <3500000>;
+					regulator-max-microamp = <3500000>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				avdd_1v05: ldo0 {
+					regulator-name = "+V1.05_AVDD";
+					regulator-min-microvolt = <1050000>;
+					regulator-max-microvolt = <1050000>;
+					regulator-boot-on;
+					regulator-always-on;
+					ams,ext-control = <1>;
+				};
+
+				vddio_sdmmc1: ldo1 {
+					regulator-name = "VDDIO_SDMMC1";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <3300000>;
+				};
+
+				ldo2 {
+					regulator-name = "+V1.2";
+					regulator-min-microvolt = <1200000>;
+					regulator-max-microvolt = <1200000>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				ldo3 {
+					regulator-name = "+V1.05_RTC";
+					regulator-min-microvolt = <1000000>;
+					regulator-max-microvolt = <1000000>;
+					regulator-boot-on;
+					regulator-always-on;
+					ams,enable-tracking;
+				};
+
+				/* 1.8V for LVDS, 3.3V for eDP */
+				ldo4 {
+					regulator-name = "AVDD_LVDS0_PLL";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+				};
+
+				/* LDO5 not used */
+
+				vddio_sdmmc3: ldo6 {
+					regulator-name = "VDDIO_SDMMC3";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <3300000>;
+				};
+
+				/* LDO7 not used */
+
+				/* LDO9 not used */
+
+				/* LDO10 not used */
+
+				ldo11 {
+					regulator-name = "+V1.8_VPP_FUSE";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+				};
+			};
+		};
+	};
+
+	/* SPI1: Apalis SPI1 */
+	spi@0,7000d400 {
+		status = "okay";
+		spi-max-frequency = <25000000>;
+	};
+
+	/* SPI2: MCU SPI */
+	spi@0,7000d600 {
+		status = "okay";
+		spi-max-frequency = <25000000>;
+	};
+
+	/* SPI4: Apalis SPI2 */
+	spi@0,7000da00 {
+		status = "okay";
+		spi-max-frequency = <25000000>;
+	};
+
+	padctl@7009f000 {
+		pinctrl-0 = <&padctl_default>;
+		pinctrl-names = "default";
+
+		padctl_default: pinmux {
+			usb3 {
+				nvidia,lanes = "pcie-0", "pcie-1";
+				nvidia,function = "usb3";
+				nvidia,iddq = <0>;
+			};
+
+			pcie {
+				nvidia,lanes = "pcie-2", "pcie-3",
+					       "pcie-4";
+				nvidia,function = "pcie";
+				nvidia,iddq = <0>;
+			};
+
+			sata {
+				nvidia,lanes = "sata-0";
+				nvidia,function = "sata";
+				nvidia,iddq = <0>;
+			};
+		};
+	};
+
+	/* Apalis MMC1 */
+	sdhci@700b0000 {
+		status = "okay";
+		/* MMC1_CD# */
+		cd-gpios = <&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_LOW>;
+		bus-width = <4>;
+	};
+
+	/* Apalis SD1 */
+	sdhci@700b0400 {
+		status = "okay";
+		/*
+		 * Don't use SD1_CD# aka SDMMC3_CLK_LB_OUT for now as it
+		 * features some magic properties even though the external
+		 * loopback is disabled and the internal loopback used as per
+		 * SDMMC_VENDOR_MISC_CNTRL_0 register's SDMMC_SPARE1 bits being
+		 * set to 0xfffd according to the TRM!
+		 * cd-gpios = <&gpio TEGRA_GPIO(EE, 4) GPIO_ACTIVE_LOW>;
+		 */
+		bus-width = <4>;
+	};
+
+	/* eMMC */
+	sdhci@700b0600 {
+		status = "okay";
+		bus-width = <8>;
+		non-removable;
+	};
+
+	/* EHCI instance 0: USB1_DP/N -> USBO1_DP/N */
+	usb@7d000000 {
+		status = "okay";
+		dr_mode = "peripheral";
+		/* USBO1_EN */
+		nvidia,vbus-gpio = <&gpio TEGRA_GPIO(N, 4) GPIO_ACTIVE_HIGH>;
+	};
+
+	/* EHCI instance 1: USB2_DP/N -> USBH2_DP/N */
+	usb@7d004000 {
+		status = "okay";
+		/* USBH_EN */
+		nvidia,vbus-gpio = <&gpio TEGRA_GPIO(N, 5) GPIO_ACTIVE_HIGH>;
+		phy_type = "utmi";
+	};
+
+	/* EHCI instance 2: USB3_DP/N -> USBH4_DP/N */
+	usb@7d008000 {
+		status = "okay";
+		nvidia,vbus-gpio = <&gpio TEGRA_GPIO(N, 5) GPIO_ACTIVE_HIGH>;
+	};
+
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mxm_3v3_reg: regulator@100 {
+			compatible = "regulator-fixed";
+			reg = <100>;
+			regulator-name = "+V3.3_MXM";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+		};
+
+		sys_3v3_reg: regulator@101 {
+			compatible = "regulator-fixed";
+			reg = <101>;
+			regulator-name = "+V3.3";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&pmic 2 GPIO_ACTIVE_HIGH>;
+			enable-active-high;
+			vin-supply = <&mxm_3v3_reg>;
+		};
+	};
+};
diff --git a/arch/arm/mach-tegra/tegra124/Kconfig b/arch/arm/mach-tegra/tegra124/Kconfig
index 88f627c9326..64341d7b592 100644
--- a/arch/arm/mach-tegra/tegra124/Kconfig
+++ b/arch/arm/mach-tegra/tegra124/Kconfig
@@ -3,6 +3,9 @@ if TEGRA124
 choice
 	prompt "Tegra124 board select"
 
+config TARGET_APALIS_TK1
+	bool "Toradex Apalis TK1 board"
+
 config TARGET_JETSON_TK1
 	bool "NVIDIA Tegra124 Jetson TK1 board"
 
@@ -23,6 +26,7 @@ endchoice
 config SYS_SOC
 	default "tegra124"
 
+source "board/toradex/apalis_tk1/Kconfig"
 source "board/nvidia/jetson-tk1/Kconfig"
 source "board/nvidia/nyan-big/Kconfig"
 source "board/nvidia/venice2/Kconfig"