[PATCH 3/4] board: rockchip: Add minimal generic RK3576 board

[Kever Yang]

On 2025/4/23 05:12, Jonas Karlman wrote:
> Add a minimal generic RK3576 board that only have eMMC and SDMMC
> enabled. This defconfig can be used to boot from eMMC or SD-card on most
> RK3576 boards that follow reference board design.
>
> eMMC and SD-card boot tested on:
> - ArmSoM Sige5
> - Toybrick TB-RK3576D
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   arch/arm/dts/rk3576-generic-u-boot.dtsi   |  3 ++
>   arch/arm/dts/rk3576-generic.dts           | 45 +++++++++++++++++++++++
>   arch/arm/mach-rockchip/rk3576/MAINTAINERS |  5 +++
>   configs/generic-rk3576_defconfig          | 41 +++++++++++++++++++++
>   doc/board/rockchip/rockchip.rst           |  1 +
>   5 files changed, 95 insertions(+)
>   create mode 100644 arch/arm/dts/rk3576-generic-u-boot.dtsi
>   create mode 100644 arch/arm/dts/rk3576-generic.dts
>   create mode 100644 arch/arm/mach-rockchip/rk3576/MAINTAINERS
>   create mode 100644 configs/generic-rk3576_defconfig
>
> diff --git a/arch/arm/dts/rk3576-generic-u-boot.dtsi b/arch/arm/dts/rk3576-generic-u-boot.dtsi
> new file mode 100644
> index 000000000000..632fabb6af56
> --- /dev/null
> +++ b/arch/arm/dts/rk3576-generic-u-boot.dtsi
> @@ -0,0 +1,3 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +
> +#include "rk3576-u-boot.dtsi"
> diff --git a/arch/arm/dts/rk3576-generic.dts b/arch/arm/dts/rk3576-generic.dts
> new file mode 100644
> index 000000000000..c4d64307ee99
> --- /dev/null
> +++ b/arch/arm/dts/rk3576-generic.dts
> @@ -0,0 +1,45 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Minimal generic DT for RK3576 with eMMC and SD-card enabled
> + */
> +
> +/dts-v1/;
> +#include "rk3576.dtsi"
> +
> +/ {
> +	model = "Generic RK3576";
> +	compatible = "rockchip,rk3576";
> +
> +	aliases {
> +		mmc0 = &sdhci;
> +		mmc1 = &sdmmc;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:1500000n8";
> +	};
> +};
> +
> +&sdhci {
> +	bus-width = <8>;
> +	cap-mmc-highspeed;
> +	mmc-hs200-1_8v;
> +	no-sd;
> +	no-sdio;
> +	non-removable;
> +	status = "okay";
> +};
> +
> +&sdmmc {
> +	bus-width = <4>;
> +	cap-sd-highspeed;
> +	disable-wp;
> +	no-mmc;
> +	no-sdio;
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	pinctrl-0 = <&uart0m0_xfer>;
> +	status = "okay";
> +};
> diff --git a/arch/arm/mach-rockchip/rk3576/MAINTAINERS b/arch/arm/mach-rockchip/rk3576/MAINTAINERS
> new file mode 100644
> index 000000000000..b5190c818468
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/rk3576/MAINTAINERS
> @@ -0,0 +1,5 @@
> +GENERIC-RK3576
> +M:	Jonas Karlman <jonas at kwiboo.se>
> +S:	Maintained
> +F:	arch/arm/dts/rk3576-generic*
> +F:	configs/generic-rk3576_defconfig
> diff --git a/configs/generic-rk3576_defconfig b/configs/generic-rk3576_defconfig
> new file mode 100644
> index 000000000000..8a688b775d1c
> --- /dev/null
> +++ b/configs/generic-rk3576_defconfig
> @@ -0,0 +1,41 @@
> +CONFIG_ARM=y
> +CONFIG_SKIP_LOWLEVEL_INIT=y
> +CONFIG_COUNTER_FREQUENCY=24000000
> +CONFIG_ARCH_ROCKCHIP=y
> +CONFIG_DEFAULT_DEVICE_TREE="rk3576-generic"
> +CONFIG_ROCKCHIP_RK3576=y
> +CONFIG_SYS_LOAD_ADDR=0x40c00800
> +CONFIG_DEBUG_UART_BASE=0x2AD40000
> +CONFIG_DEBUG_UART_CLOCK=24000000
> +CONFIG_DEBUG_UART=y
> +# CONFIG_BOOTMETH_VBE is not set
> +CONFIG_DEFAULT_FDT_FILE="rockchip/rk3576-generic.dtb"
> +# CONFIG_DISPLAY_CPUINFO is not set
> +CONFIG_SPL_MAX_SIZE=0x40000
> +CONFIG_SPL_PAD_TO=0x7f8000
> +# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
> +CONFIG_CMD_MEMINFO=y
> +CONFIG_CMD_MEMINFO_MAP=y
> +CONFIG_CMD_GPIO=y
> +CONFIG_CMD_GPT=y
> +CONFIG_CMD_MISC=y
> +CONFIG_CMD_MMC=y
> +# CONFIG_CMD_SETEXPR is not set
> +CONFIG_CMD_RNG=y
> +# CONFIG_SPL_DOS_PARTITION is not set
> +# CONFIG_OF_UPSTREAM is not set
> +CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
> +CONFIG_NO_NET=y
> +# CONFIG_ADC is not set
> +CONFIG_ROCKCHIP_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_BAUDRATE=1500000
> +CONFIG_DEBUG_UART_SHIFT=2
> +CONFIG_SYS_NS16550_MEM32=y
> +CONFIG_SYSRESET_PSCI=y
> +CONFIG_ERRNO_STR=y
> diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
> index b06f87b137cd..69c8fbf3b948 100644
> --- a/doc/board/rockchip/rockchip.rst
> +++ b/doc/board/rockchip/rockchip.rst
> @@ -134,6 +134,7 @@ List of mainline supported Rockchip boards:
>   
>   * rk3576
>        - Firefly ROC-RK3576-PC (roc-pc-rk3576)
> +     - Generic RK3576 (generic-rk3576)
>   
>   * rk3588
>        - ArmSoM Sige7 (sige7-rk3588)