rockchip: board: Add minimal generic RK3566/RK3568 board

Add a minimal generic RK3566/RK3568 board that only have eMMC and SDMMC
enabled. This defconfig can be used to boot from eMMC or SD-card on most
RK3566/RK3568 boards that follow reference board design.

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

arch/arm/dts/rk3568-generic-u-boot.dtsi

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk356x-u-boot.dtsi"
+
+/ {
+	chosen {
+		stdout-path = &uart2;
+	};
+};
+
+&uart2 {
+	bootph-pre-ram;
+	clock-frequency = <24000000>;
+};

arch/arm/dts/rk3568-generic.dts

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Minimal generic DT for RK3566/RK3568 with eMMC and SD-card enabled
+ */
+
+/dts-v1/;
+#include "rk356x.dtsi"
+
+/ {
+	model = "Generic RK3566/RK3568";
+	compatible = "rockchip,rk3568";
+
+	chosen: chosen {
+		stdout-path = "serial2:1500000n8";
+	};
+};
+
+&sdhci {
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_bus8 &emmc_clk &emmc_cmd>;
+	status = "okay";
+};
+
+&sdmmc0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	disable-wp;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd>;
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};

board/rockchip/evb_rk3568/MAINTAINERS

@@ -7,6 +7,13 @@ F:	configs/evb-rk3568_defconfig
 F:	arch/arm/dts/rk3568-evb-u-boot.dtsi
 F:	arch/arm/dts/rk3568-evb.dts
 
+GENERIC-RK3568
+M:	Jonas Karlman <jonas@kwiboo.se>
+S:	Maintained
+F:	configs/generic-rk3568_defconfig
+F:	arch/arm/dts/rk3568-generic.dts
+F:	arch/arm/dts/rk3568-generic-u-boot.dtsi
+
 LUBANCAT-2
 M:	Andy Yan <andyshrk@163.com>
 S:	Maintained

configs/generic-rk3568_defconfig

@@ -0,0 +1,64 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_TEXT_BASE=0x00a00000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xc00000
+CONFIG_DEFAULT_DEVICE_TREE="rk3568-generic"
+CONFIG_ROCKCHIP_RK3568=y
+CONFIG_SPL_ROCKCHIP_COMMON_BOARD=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL_STACK_R_ADDR=0x600000
+CONFIG_SPL_STACK=0x400000
+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/rk3568-generic.dtb"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SPL_MAX_SIZE=0x40000
+CONFIG_SPL_PAD_TO=0x7f8000
+CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
+CONFIG_SPL_BSS_START_ADDR=0x4000000
+CONFIG_SPL_BSS_MAX_SIZE=0x4000
+# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
+# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_ATF=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MMC=y
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIVE=y
+CONFIG_OF_SPL_REMOVE_PROPS="pinctrl-0 pinctrl-names clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_SPL_REGMAP=y
+CONFIG_SPL_SYSCON=y
+CONFIG_SPL_CLK=y
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_MISC=y
+# CONFIG_ROCKCHIP_IODOMAIN is not set
+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_SPL_RAM=y
+CONFIG_BAUDRATE=1500000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_SYSRESET=y
+CONFIG_ERRNO_STR=y

doc/board/rockchip/rockchip.rst

@@ -104,6 +104,7 @@ List of mainline supported Rockchip boards:
      - EmbedFire LubanCat 2 (lubancat-2-rk3568)
      - FriendlyElec NanoPi R5C (nanopi-r5c-rk3568)
      - FriendlyElec NanoPi R5S (nanopi-r5s-rk3568)
+     - Generic RK3566/RK3568 (generic-rk3568)
      - Hardkernel ODROID-M1 (odroid-m1-rk3568)
      - Radxa E25 Carrier Board (radxa-e25-rk3568)
      - Radxa ROCK 3 Model A (rock-3a-rk3568)