board: rockchip: Add Radxa ZERO 3W/3E

The Radxa ZERO 3W/3E is an ultra-small, high-performance single board
computer based on the Rockchip RK3566, with a compact form factor and
rich interfaces.

Implement rk_board_late_init() to set correct fdtfile env var and
board_fit_config_name_match() to load correct FIT config based on what
board is detected at runtime so a single board target can be used for
both board models.

Features tested on a ZERO 3W 8GB v1.11:
- SD-card boot
- eMMC boot
- USB gadget
- USB host

Features tested on a ZERO 3E 4GB v1.2:
- SD-card boot
- Ethernet
- USB gadget
- USB host

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

arch/arm/dts/rk3566-radxa-zero-3e-u-boot.dtsi

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk356x-u-boot.dtsi"
+
+&saradc {
+	bootph-pre-ram;
+};
+
+&usb_host0_xhci {
+	dr_mode = "otg";
+};
+
+&vcca_1v8 {
+	bootph-pre-ram;
+};

arch/arm/dts/rk3566-radxa-zero-3w-u-boot.dtsi

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk356x-u-boot.dtsi"
+
+&saradc {
+	bootph-pre-ram;
+};
+
+&usb_host0_xhci {
+	dr_mode = "otg";
+};
+
+&vcca_1v8 {
+	bootph-pre-ram;
+};

arch/arm/mach-rockchip/rk3568/Kconfig

@@ -32,6 +32,11 @@ config TARGET_QUARTZ64_RK3566
 	help
 	  Pine64 Quartz64 single board computer with a RK3566 SoC.
 
+config TARGET_RADXA_ZERO_3_RK3566
+	bool "Radxa ZERO 3W/3E"
+	help
+	  Radxa ZERO 3W/3E single board computers with a RK3566 SoC.
+
 endchoice
 
 config ROCKCHIP_BOOT_MODE_REG
@@ -54,5 +59,6 @@ source "board/anbernic/rgxx3_rk3566/Kconfig"
 source "board/hardkernel/odroid_m1/Kconfig"
 source "board/pine64/quartz64_rk3566/Kconfig"
 source "board/powkiddy/x55/Kconfig"
+source "board/radxa/zero3-rk3566/Kconfig"
 
 endif

board/radxa/zero3-rk3566/Kconfig

@@ -0,0 +1,12 @@
+if TARGET_RADXA_ZERO_3_RK3566
+
+config SYS_BOARD
+	default "zero3-rk3566"
+
+config SYS_VENDOR
+	default "radxa"
+
+config SYS_CONFIG_NAME
+	default "evb_rk3568"
+
+endif

board/radxa/zero3-rk3566/MAINTAINERS

@@ -0,0 +1,6 @@
+RADXA-ZERO-3-RK3566
+M:	Jonas Karlman <jonas@kwiboo.se>
+S:	Maintained
+F:	board/radxa/zero3-rk3566
+F:	configs/radxa-zero-3-rk3566_defconfig
+F:	arch/arm/dts/rk3566-radxa-zero-3*

board/radxa/zero3-rk3566/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += zero3-rk3566.o

board/radxa/zero3-rk3566/zero3-rk3566.c

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <adc.h>
+#include <env.h>
+
+#define HW_ID_CHANNEL	1
+
+struct board_model {
+	unsigned int low;
+	unsigned int high;
+	const char *fdtfile;
+};
+
+static const struct board_model board_models[] = {
+	{ 230, 270, "rockchip/rk3566-radxa-zero-3w.dtb" },
+	{ 400, 450, "rockchip/rk3566-radxa-zero-3e.dtb" },
+};
+
+static const struct board_model *get_board_model(void)
+{
+	unsigned int val;
+	int i, ret;
+
+	ret = adc_channel_single_shot("saradc@fe720000", HW_ID_CHANNEL, &val);
+	if (ret)
+		return NULL;
+
+	for (i = 0; i < ARRAY_SIZE(board_models); i++) {
+		unsigned int min = board_models[i].low;
+		unsigned int max = board_models[i].high;
+
+		if (min <= val && val <= max)
+			return &board_models[i];
+	}
+
+	return NULL;
+}
+
+int rk_board_late_init(void)
+{
+	const struct board_model *model = get_board_model();
+
+	if (model)
+		env_set("fdtfile", model->fdtfile);
+
+	return 0;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	const struct board_model *model = get_board_model();
+
+	if (model && !strcmp(name, model->fdtfile))
+		return 0;
+
+	return -EINVAL;
+}

configs/radxa-zero-3-rk3566_defconfig

@@ -0,0 +1,85 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_SPL_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3566-radxa-zero-3w"
+CONFIG_ROCKCHIP_RK3568=y
+CONFIG_SPL_SERIAL=y
+CONFIG_TARGET_RADXA_ZERO_3_RK3566=y
+CONFIG_DEBUG_UART_BASE=0xFE660000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_SYS_LOAD_ADDR=0xc00800
+CONFIG_DEBUG_UART=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_SPL_FIT_SIGNATURE=y
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_DEFAULT_FDT_FILE="rockchip/rk3566-radxa-zero-3w.dtb"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SPL_MAX_SIZE=0x40000
+CONFIG_SPL_PAD_TO=0x7f8000
+# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
+CONFIG_SPL_POWER=y
+CONFIG_SPL_ATF=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_I2C=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_PMIC=y
+CONFIG_CMD_REGULATOR=y
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIVE=y
+CONFIG_OF_LIST="rockchip/rk3566-radxa-zero-3w rockchip/rk3566-radxa-zero-3e"
+CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_SPL_REGMAP=y
+CONFIG_SPL_SYSCON=y
+CONFIG_SPL_ADC=y
+CONFIG_SPL_CLK=y
+# CONFIG_USB_FUNCTION_FASTBOOT is not set
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_MISC=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_DWC_ETH_QOS=y
+CONFIG_DWC_ETH_QOS_ROCKCHIP=y
+CONFIG_PHY_ROCKCHIP_INNO_USB2=y
+CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_FAN53555=y
+CONFIG_PMIC_RK8XX=y
+CONFIG_SPL_DM_REGULATOR=y
+CONFIG_SPL_DM_REGULATOR_FIXED=y
+CONFIG_REGULATOR_RK8XX=y
+CONFIG_SPL_RAM=y
+CONFIG_BAUDRATE=1500000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_PSCI=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=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

@@ -107,6 +107,7 @@ List of mainline supported Rockchip boards:
      - Powkiddy X55 (powkiddy-x55-rk3566)
      - Radxa CM3 IO Board (radxa-cm3-io-rk3566)
      - Radxa ROCK 3C (rock-3c-rk3566)
+     - Radxa ZERO 3W/3E (radxa-zero-3-rk3566)
 
 * rk3568
      - Rockchip Evb-RK3568 (evb-rk3568)