board: rockchip: Add ArmSoM Sige1

The Sige1 is a single board computer developed by ArmSoM, based on the
Rockchip RK3528A SoC.

Add support for the ArmSoM Sige1 board.

Features tested on a ArmSoM Sige1 v1.1:
- SD-card boot
- eMMC boot
- Ethernet
- USB host (with pending DT changes)

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3528-armsom-sige1-u-boot.dtsi

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk3528-u-boot.dtsi"
+
+&vdd_arm {
+	regulator-init-microvolt = <953000>;
+};
+
+&vdd_logic {
+	regulator-init-microvolt = <900000>;
+};

arch/arm/mach-rockchip/rk3528/MAINTAINERS

@@ -9,3 +9,9 @@ M:	Jonas Karlman <jonas@kwiboo.se>
 S:	Maintained
 F:	arch/arm/dts/rk3528-radxa-e20c*
 F:	configs/radxa-e20c-rk3528_defconfig
+
+SIGE1-RK3528
+M:	Jonas Karlman <jonas@kwiboo.se>
+S:	Maintained
+F:	arch/arm/dts/rk3528-armsom-sige1*
+F:	configs/sige1-rk3528_defconfig

configs/sige1-rk3528_defconfig

@@ -0,0 +1,64 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3528-armsom-sige1"
+CONFIG_ROCKCHIP_RK3528=y
+CONFIG_SYS_LOAD_ADDR=0xc00800
+CONFIG_DEBUG_UART_BASE=0xFF9F0000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_DEBUG_UART=y
+CONFIG_DEFAULT_FDT_FILE="rockchip/rk3528-armsom-sige1.dtb"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_BOARD_RNG_SEED=y
+CONFIG_SPL_MAX_SIZE=0x40000
+# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MEMINFO_MAP=y
+CONFIG_CMD_ADC=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MISC=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_ROCKUSB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_RNG=y
+CONFIG_CMD_REGULATOR=y
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
+CONFIG_BUTTON=y
+CONFIG_BUTTON_ADC=y
+# CONFIG_USB_FUNCTION_FASTBOOT is not set
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_SUPPORT_EMMC_RPMB=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_ROCKCHIP=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_PHY_REALTEK=y
+CONFIG_DM_MDIO=y
+CONFIG_DWC_ETH_QOS=y
+CONFIG_DWC_ETH_QOS_ROCKCHIP=y
+CONFIG_PHY_ROCKCHIP_INNO_USB2=y
+CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
+CONFIG_REGULATOR_PWM=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_PWM_ROCKCHIP=y
+CONFIG_BAUDRATE=1500000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_USB_FUNCTION_ROCKUSB=y
+CONFIG_ERRNO_STR=y

doc/board/rockchip/rockchip.rst

@@ -100,6 +100,7 @@ List of mainline supported Rockchip boards:
      - Theobroma Systems RK3399-Q7 SoM - Puma (puma_rk3399)
 
 * rk3528
+     - ArmSoM Sige1 (sige1-rk3528)
      - Generic RK3528 (generic-rk3528)
      - Radxa E20C (radxa-e20c-rk3528)
      - Radxa ROCK 2A/2F (rock-2-rk3528)