[PATCH v2 29/30] board: rockchip: Add minimal generic RK3528 board

[Kever Yang]

On 2025/4/8 06:47, Jonas Karlman wrote:
> Add a minimal generic RK3528 board that only have eMMC and SD-card
> enabled. This defconfig can be used to boot from eMMC or SD-card on most
> RK3528 boards that follow reference board design.
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
> Changes in v2:
> - Move sdhci node to main .dts-file
> - Enable meminfo cmd
>
> Tested on:
> - FriendlyElec NanoPi Zero2
> - Radxa ROCK 2A
> - Radxa ROCK 2F
> ---
>   arch/arm/dts/rk3528-generic-u-boot.dtsi   | 12 +++++++
>   arch/arm/dts/rk3528-generic.dts           | 31 ++++++++++++++++++
>   arch/arm/mach-rockchip/rk3528/MAINTAINERS |  5 +++
>   configs/generic-rk3528_defconfig          | 40 +++++++++++++++++++++++
>   doc/board/rockchip/rockchip.rst           | 12 +++++++
>   5 files changed, 100 insertions(+)
>   create mode 100644 arch/arm/dts/rk3528-generic-u-boot.dtsi
>   create mode 100644 arch/arm/dts/rk3528-generic.dts
>   create mode 100644 arch/arm/mach-rockchip/rk3528/MAINTAINERS
>   create mode 100644 configs/generic-rk3528_defconfig
>
> diff --git a/arch/arm/dts/rk3528-generic-u-boot.dtsi b/arch/arm/dts/rk3528-generic-u-boot.dtsi
> new file mode 100644
> index 000000000000..cc830b514567
> --- /dev/null
> +++ b/arch/arm/dts/rk3528-generic-u-boot.dtsi
> @@ -0,0 +1,12 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +
> +#include "rk3528-u-boot.dtsi"
> +
> +&sdmmc {
> +	bus-width = <4>;
> +	cap-sd-highspeed;
> +	disable-wp;
> +	no-mmc;
> +	no-sdio;
> +	status = "okay";
> +};
> diff --git a/arch/arm/dts/rk3528-generic.dts b/arch/arm/dts/rk3528-generic.dts
> new file mode 100644
> index 000000000000..792d3e04a4cb
> --- /dev/null
> +++ b/arch/arm/dts/rk3528-generic.dts
> @@ -0,0 +1,31 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Minimal generic DT for RK3528 with eMMC enabled
> + */
> +
> +/dts-v1/;
> +#include "rk3528.dtsi"
> +
> +/ {
> +	model = "Generic RK3528";
> +	compatible = "rockchip,rk3528";
> +
> +	chosen {
> +		stdout-path = "serial0:1500000n8";
> +	};
> +};
> +
> +&sdhci {
> +	bus-width = <8>;
> +	cap-mmc-highspeed;
> +	no-sd;
> +	no-sdio;
> +	non-removable;
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart0m0_xfer>;
> +	status = "okay";
> +};
> diff --git a/arch/arm/mach-rockchip/rk3528/MAINTAINERS b/arch/arm/mach-rockchip/rk3528/MAINTAINERS
> new file mode 100644
> index 000000000000..cfdc92d770c1
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/rk3528/MAINTAINERS
> @@ -0,0 +1,5 @@
> +GENERIC-RK3528
> +M:	Jonas Karlman <jonas at kwiboo.se>
> +S:	Maintained
> +F:	arch/arm/dts/rk3528-generic*
> +F:	configs/generic-rk3528_defconfig
> diff --git a/configs/generic-rk3528_defconfig b/configs/generic-rk3528_defconfig
> new file mode 100644
> index 000000000000..e19c7bc4801d
> --- /dev/null
> +++ b/configs/generic-rk3528_defconfig
> @@ -0,0 +1,40 @@
> +CONFIG_ARM=y
> +CONFIG_SKIP_LOWLEVEL_INIT=y
> +CONFIG_COUNTER_FREQUENCY=24000000
> +CONFIG_ARCH_ROCKCHIP=y
> +CONFIG_DEFAULT_DEVICE_TREE="rk3528-generic"
> +CONFIG_ROCKCHIP_RK3528=y
> +CONFIG_SYS_LOAD_ADDR=0xc00800
> +CONFIG_DEBUG_UART_BASE=0xFF9F0000
> +CONFIG_DEBUG_UART_CLOCK=24000000
> +CONFIG_DEBUG_UART=y
> +# CONFIG_BOOTMETH_VBE is not set
> +CONFIG_DEFAULT_FDT_FILE="rockchip/rk3528-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_ERRNO_STR=y
> diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
> index 5a029afae305..c636d33b47c1 100644
> --- a/doc/board/rockchip/rockchip.rst
> +++ b/doc/board/rockchip/rockchip.rst
> @@ -99,6 +99,9 @@ List of mainline supported Rockchip boards:
>        - Rockchip Evb-RK3399 (evb_rk3399)
>        - Theobroma Systems RK3399-Q7 SoM - Puma (puma_rk3399)
>   
> +* rk3528
> +     - Generic RK3528 (generic-rk3528)
> +
>   * rk3566
>        - Anbernic RGxx3 (anbernic-rgxx3-rk3566)
>        - FriendlyElec NanoPi R3S (nanopi-r3s-rk3566)
> @@ -260,6 +263,15 @@ To build rk3399 boards:
>           make evb-rk3399_defconfig
>           make CROSS_COMPILE=aarch64-linux-gnu-
>   
> +To build rk3528 boards:
> +
> +.. code-block:: bash
> +
> +        export BL31=../rkbin/bin/rk35/rk3528_bl31_v1.18.elf
> +        export ROCKCHIP_TPL=../rkbin/bin/rk35/rk3528_ddr_1056MHz_v1.10.bin
> +        make generic-rk3528_defconfig
> +        make CROSS_COMPILE=aarch64-linux-gnu-
> +
>   To build rk3568 boards:
>   
>   .. code-block:: bash