asus: add transformer t30 board support

Board derives from Cardhu board.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Author: clamor-s

arch/arm/dts/tegra30-asus-transformer.dtsi

@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "tegra30.dtsi"
+
+/ {
+	compatible = "asus,transformer", "nvidia,tegra30";
+
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		mmc0 = &sdmmc4;	/* eMMC */
+		mmc1 = &sdmmc1; /* uSD slot */
+
+		rtc0 = &pmic;
+		rtc1 = "/rtc@7000e000";
+
+		usb0 = &usb1;
+		usb1 = &usb3; /* Dock USB */
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x40000000>;
+	};
+
+	uarta: serial@70006000 {
+		status = "okay";
+	};
+
+	pwm: pwm@7000a000 {
+		status = "okay";
+	};
+
+	sdmmc1: sdhci@78000000 {
+		status = "okay";
+		bus-width = <4>;
+
+		cd-gpios = <&gpio TEGRA_GPIO(I, 5) GPIO_ACTIVE_LOW>;
+		power-gpios = <&gpio TEGRA_GPIO(D, 7) GPIO_ACTIVE_HIGH>;
+
+		vmmc-supply = <&vdd_usd>;
+		vqmmc-supply = <&vddio_usd>;
+	};
+
+	sdmmc4: sdhci@78000600 {
+		status = "okay";
+		bus-width = <8>;
+		non-removable;
+	};
+
+	/* USB via ASUS connector */
+	usb1: usb@7d000000 {
+		status = "okay";
+		dr_mode = "otg";
+	};
+
+	/* Dock's USB port */
+	usb3: usb@7d008000 {
+		status = "okay";
+	};
+
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock@0 {
+			compatible = "fixed-clock";
+			reg = <0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+};

arch/arm/mach-tegra/tegra30/Kconfig

@@ -24,11 +24,16 @@ config TARGET_TEC_NG
 	bool "Avionic Design TEC-NG board"
 	select BOARD_LATE_INIT
 
+config TARGET_TRANSFORMER_T30
+	bool "Asus Tegra30 Transformer board"
+	select BOARD_LATE_INIT
+
 endchoice
 
 config SYS_SOC
 	default "tegra30"
 
+source "board/asus/transformer-t30/Kconfig"
 source "board/toradex/apalis_t30/Kconfig"
 source "board/nvidia/beaver/Kconfig"
 source "board/nvidia/cardhu/Kconfig"

board/asus/transformer-t30/Kconfig

@@ -0,0 +1,27 @@
+if TARGET_TRANSFORMER_T30
+
+config SYS_BOARD
+	default "transformer-t30"
+
+config SYS_VENDOR
+	default "asus"
+
+config SYS_CONFIG_NAME
+	default "transformer-t30"
+
+config TRANSFORMER_SPI_BOOT
+	bool "Enable support for SPI based flash"
+	default n
+	help
+	  Tegra 3 based Transformers with Windows RT have core
+	  boot sequence (BCT, PT, EBT) on separate SPI FLASH
+	  memory with 4MB size.
+
+config TRANSFORMER_TF700T_MIPI
+	bool "Enable support for TF700T MIPI panel configuration"
+	default n
+	help
+	  TF700T has different panel configuration then other
+	  Transformers and uses I2C bridge.
+
+endif

board/asus/transformer-t30/MAINTAINERS

@@ -0,0 +1,6 @@
+TRANSFORMER BOARD
+M:	Svyatoslav Ryhel <clamor95@gmail.com>
+S:	Maintained
+F:	board/asus/transformer-t30/
+F:	include/configs/transformer-t30.h
+F:	configs/transformer_t30_defconfig

board/asus/transformer-t30/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+#  (C) Copyright 2010-2012
+#  NVIDIA Corporation <www.nvidia.com>
+#
+#  (C) Copyright 2021
+#  Svyatoslav Ryhel <clamor95@gmail.com>
+
+obj-y := transformer-t30.o