board: rockchip: Add FriendlyElec NanoPi Zero2

The NanoPi Zero2 is a small single board computer developed by
FriendlyElec, based on the Rockchip RK3528A SoC.

Add support for the FriendlyElec NanoPi Zero2 board.

Features tested on a FriendlyElec NanoPi Zero2 2407:
- SD-card boot
- eMMC boot
- Ethernet
- USB host

Signed-off-by: Jonas Karlman <[email protected]>
Reviewed-by: Christopher Obbard <[email protected]>
Reviewed-by: Quentin Schulz <[email protected]>
Reviewed-by: Kever Yang <[email protected]>

4 files changed, 82 insertions, 0 deletions

diff --git a/arch/arm/dts/rk3528-nanopi-zero2-u-boot.dtsi b/arch/arm/dts/rk3528-nanopi-zero2-u-boot.dtsi
new file mode 100644
index 00000000000..3e2fbd81da1
--- /dev/null
+++ b/arch/arm/dts/rk3528-nanopi-zero2-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>;
+};
diff --git a/arch/arm/mach-rockchip/rk3528/MAINTAINERS b/arch/arm/mach-rockchip/rk3528/MAINTAINERS
index ee840396e8b..111fe0270df 100644
--- a/arch/arm/mach-rockchip/rk3528/MAINTAINERS
+++ b/arch/arm/mach-rockchip/rk3528/MAINTAINERS
@@ -4,6 +4,12 @@ S:	Maintained
 F:	arch/arm/dts/rk3528-generic*
 F:	configs/generic-rk3528_defconfig
 
+NANOPI-ZERO2-RK3528
+M:	Jonas Karlman <[email protected]>
+S:	Maintained
+F:	arch/arm/dts/rk3528-nanopi-zero2*
+F:	configs/nanopi-zero2-rk3528_defconfig
+
 RADXA-E20C
 M:	Jonas Karlman <[email protected]>
 S:	Maintained
diff --git a/configs/nanopi-zero2-rk3528_defconfig b/configs/nanopi-zero2-rk3528_defconfig
new file mode 100644
index 00000000000..2e54c0ff20a
--- /dev/null
+++ b/configs/nanopi-zero2-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-nanopi-zero2"
+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-nanopi-zero2.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
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index 7a8532b49fc..6232ef8deb7 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -101,6 +101,7 @@ List of mainline supported Rockchip boards:
 
 * rk3528
      - ArmSoM Sige1 (sige1-rk3528)
+     - FriendlyElec NanoPi Zero2 (nanopi-zero2-rk3528)
      - Generic RK3528 (generic-rk3528)
      - Radxa E20C (radxa-e20c-rk3528)
      - Radxa ROCK 2A/2F (rock-2-rk3528)