rockchip: Add support for Raxda Rock 2

This board includes an RK3288 SoC on a SOM. It can be mounted on a
base-board which provides a wide range of peripherals.

So far this is verified to boot to a prompt from a microSD card. The serial
console works as well as HDMI.

Thanks to Tom Cubie for sending me a board.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/rock2_defconfig b/configs/rock2_defconfig
new file mode 100644
index 0000000..2563775
--- /dev/null
+++ b/configs/rock2_defconfig
@@ -0,0 +1,53 @@
+CONFIG_ARM=y
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_ROCKCHIP_RK3288=y
+CONFIG_TARGET_ROCK2=y
+CONFIG_SPL_STACK_R_ADDR=0x80000
+CONFIG_DEFAULT_DEVICE_TREE="rk3288-rock2-square"
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x2000
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_SPL_REMOVE_PROPS="pinctrl-0 pinctrl-names clock-names interrupt-parent"
+CONFIG_REGMAP=y
+CONFIG_SPL_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_SPL_SYSCON=y
+# CONFIG_SPL_SIMPLE_BUS is not set
+CONFIG_CLK=y
+CONFIG_SPL_CLK=y
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_RESET=y
+CONFIG_DM_MMC=y
+CONFIG_ROCKCHIP_DWMMC=y
+CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
+# CONFIG_SPL_PINCTRL_FULL is not set
+CONFIG_ROCKCHIP_PINCTRL=y
+CONFIG_DM_PMIC=y
+# CONFIG_SPL_PMIC_CHILDREN is not set
+CONFIG_PMIC_ACT8846=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_REGULATOR_ACT8846=y
+CONFIG_DM_PWM=y
+CONFIG_PWM_ROCKCHIP=y
+CONFIG_RAM=y
+CONFIG_SPL_RAM=y
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_BASE=0xff690000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
+CONFIG_DM_VIDEO=y
+CONFIG_VIDEO_ROTATION=y
+CONFIG_VIDEO_ROCKCHIP=y
+CONFIG_USE_PRIVATE_LIBGCC=y
+CONFIG_USE_TINY_PRINTF=y
+CONFIG_CMD_DHRYSTONE=y
+CONFIG_ERRNO_STR=y