Re: [PATCH next v3 8/8] rockchip: add support for Theobroma Systems SOM-RK3588-Q7 Tiger module

[Kever Yang <kever.yang@rock-chips.com>]

On 2024/6/10 21:13, Quentin Schulz wrote:
> From: Quentin Schulz <quentin.schulz@cherry.de>
>
> The RK3588-Q7 SoM is a Qseven-compatible (70mm x 70mm, MXM-230
> connector) system-on-module from Theobroma Systems, featuring the
> Rockchip RK3588.
>
> It provides the following feature set:
>   * up to 16GB LPDDR4x
>   * on-module eMMC
>   * SD card (on a baseboard) via edge connector
>   * Gigabit Ethernet with on-module GbE PHY
>   * HDMI/eDP
>   * MIPI-DSI
>   * 4x MIPI-CSI (3x on FPC connectors, 1x over Q7)
>   * HDMI input over FPC connector
>   * CAN
>   * USB
>     - 1x USB 3.0 dual-role (direct connection)
>     - 2x USB 3.0 host + 1x USB 2.0 host
>   * PCIe
>     - 1x PCIe 2.1 Gen3, 4 lanes
>     - 2xSATA / 2x PCIe 2.1 Gen1, 2 lanes
>   * on-module ATtiny816 companion controller, implementing:
>     - low-power RTC functionality (ISL1208 emulation)
>     - fan controller (AMC6821 emulation)
>   * on-module Secure Element with Global Platform 2.2.1 compliant
>     JavaCard environment
>
> The support is added for Tiger on Haikou devkit, similarly to RK3399
> Puma and PX30 Ringneck.
>
> Cc: Quentin Schulz <foss+uboot@0leil.net>
> Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
> Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

Thanks,
- Kever
> ---
>   arch/arm/dts/rk3588-tiger-haikou-u-boot.dtsi       |  37 +++++++
>   arch/arm/mach-rockchip/rk3588/Kconfig              |  31 ++++++
>   board/theobroma-systems/tiger_rk3588/Kconfig       |  16 +++
>   board/theobroma-systems/tiger_rk3588/MAINTAINERS   |  13 +++
>   board/theobroma-systems/tiger_rk3588/Makefile      |  10 ++
>   .../theobroma-systems/tiger_rk3588/tiger_rk3588.c  |  53 ++++++++++
>   configs/tiger-rk3588_defconfig                     | 113 +++++++++++++++++++++
>   doc/board/rockchip/rockchip.rst                    |   1 +
>   doc/board/theobroma-systems/index.rst              |   1 +
>   doc/board/theobroma-systems/tiger_rk3588.rst       | 102 +++++++++++++++++++
>   include/configs/tiger_rk3588.h                     |  15 +++
>   11 files changed, 392 insertions(+)
>
> diff --git a/arch/arm/dts/rk3588-tiger-haikou-u-boot.dtsi b/arch/arm/dts/rk3588-tiger-haikou-u-boot.dtsi
> new file mode 100644
> index 00000000000..275ae6fdaea
> --- /dev/null
> +++ b/arch/arm/dts/rk3588-tiger-haikou-u-boot.dtsi
> @@ -0,0 +1,37 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2024 Theobroma Systems Design und Consulting GmbH
> + */
> +
> +#include "rk3588-u-boot.dtsi"
> +
> +/ {
> +	chosen {
> +		u-boot,spl-boot-order = "same-as-spl", &sdhci, &sdmmc;
> +	};
> +};
> +
> +&emmc_pwrseq {
> +	bootph-pre-ram;
> +	bootph-some-ram;
> +};
> +
> +&emmc_reset {
> +	bootph-pre-ram;
> +	bootph-some-ram;
> +};
> +
> +&gpio2 {
> +	bootph-pre-ram;
> +	bootph-some-ram;
> +};
> +
> +&sdhci {
> +	/* U-Boot currently cannot handle anything below HS200 for eMMC on RK3588 */
> +	/delete-property/ mmc-ddr-1_8v;
> +	/delete-property/ cap-mmc-highspeed;
> +};
> +
> +&uart2m2_xfer {
> +	bootph-all;
> +};
> diff --git a/arch/arm/mach-rockchip/rk3588/Kconfig b/arch/arm/mach-rockchip/rk3588/Kconfig
> index 9f82e9f3371..9a35c7d9cc2 100644
> --- a/arch/arm/mach-rockchip/rk3588/Kconfig
> +++ b/arch/arm/mach-rockchip/rk3588/Kconfig
> @@ -193,6 +193,36 @@ config TARGET_QUARTZPRO64_RK3588
>   	  Pine64 QuartzPro64 is a Rockchip RK3588 based SBC (Single Board
>   	  Computer) by Pine64.
>   
> +config TARGET_TIGER_RK3588
> +	bool "Theobroma Systems SOM-RK3588-Q7 (Tiger)"
> +	select BOARD_LATE_INIT
> +	help
> +	  The RK3588-Q7 SoM is a Qseven-compatible (70mm x 70mm, MXM-230
> +	  connector) system-on-module from Theobroma Systems, featuring the
> +	  Rockchip RK3588.
> +
> +	  It provides the following feature set:
> +	   * up to 16GB LPDDR4x
> +	   * on-module eMMC
> +	   * SD card (on a baseboard) via edge connector
> +	   * Gigabit Ethernet with on-module GbE PHY
> +	   * HDMI/eDP
> +	   * MIPI-DSI
> +	   * 4x MIPI-CSI (3x on FPC connectors, 1x over Q7)
> +	   * HDMI input over FPC connector
> +	   * CAN
> +	   * USB
> +	     - 1x USB 3.0 dual-role (direct connection)
> +	     - 2x USB 3.0 host + 1x USB 2.0 host
> +	   * PCIe
> +	     - 1x PCIe 2.1 Gen3, 4 lanes
> +	     - 2xSATA / 2x PCIe 2.1 Gen1, 2 lanes
> +	   * on-module ATtiny816 companion controller, implementing:
> +	     - low-power RTC functionality (ISL1208 emulation)
> +	     - fan controller (AMC6821 emulation)
> +	   * on-module Secure Element with Global Platform 2.2.1 compliant
> +	     JavaCard environment
> +
>   config TARGET_TURINGRK1_RK3588
>   	bool "Turing Machines RK1 RK3588 board"
>   	select BOARD_LATE_INIT
> @@ -266,5 +296,6 @@ source "board/radxa/rock5b-rk3588/Kconfig"
>   source "board/rockchip/evb_rk3588/Kconfig"
>   source "board/rockchip/toybrick_rk3588/Kconfig"
>   source "board/theobroma-systems/jaguar_rk3588/Kconfig"
> +source "board/theobroma-systems/tiger_rk3588/Kconfig"
>   
>   endif
> diff --git a/board/theobroma-systems/tiger_rk3588/Kconfig b/board/theobroma-systems/tiger_rk3588/Kconfig
> new file mode 100644
> index 00000000000..2c6ac6a9a83
> --- /dev/null
> +++ b/board/theobroma-systems/tiger_rk3588/Kconfig
> @@ -0,0 +1,16 @@
> +if TARGET_TIGER_RK3588
> +
> +config SYS_BOARD
> +	default "tiger_rk3588"
> +
> +config SYS_VENDOR
> +	default "theobroma-systems"
> +
> +config SYS_CONFIG_NAME
> +	default "tiger_rk3588"
> +
> +config BOARD_SPECIFIC_OPTIONS # dummy
> +	def_bool y
> +	select ENV_IS_NOWHERE
> +
> +endif
> diff --git a/board/theobroma-systems/tiger_rk3588/MAINTAINERS b/board/theobroma-systems/tiger_rk3588/MAINTAINERS
> new file mode 100644
> index 00000000000..e5aab4b29f3
> --- /dev/null
> +++ b/board/theobroma-systems/tiger_rk3588/MAINTAINERS
> @@ -0,0 +1,13 @@
> +TIGER-RK3588 (SOM-RK3588-Q7)
> +M:	Klaus Goger <klaus.goger@cherry.de>
> +M:	Quentin Schulz <quentin.schulz@cherry.de>
> +M:	Heiko Stuebner <heiko.stuebner@cherry.de>
> +S:	Maintained
> +F:	board/theobroma-systems/tiger_rk3588
> +F:	board/theobroma-systems/common
> +F:	doc/board/theobroma-systems/
> +F:	include/configs/tiger_rk3588.h
> +F:	arch/arm/dts/rk3588-tiger*
> +F:	configs/tiger-rk3588_defconfig
> +W:	https://embedded.cherry.de/product/tiger-som-rk3588-q7/
> +T:	git git://git.embedded.cherry.de/tiger-u-boot.git
> diff --git a/board/theobroma-systems/tiger_rk3588/Makefile b/board/theobroma-systems/tiger_rk3588/Makefile
> new file mode 100644
> index 00000000000..5c4c484657a
> --- /dev/null
> +++ b/board/theobroma-systems/tiger_rk3588/Makefile
> @@ -0,0 +1,10 @@
> +#
> +# Copyright (c) 2024 Theobroma Systems Design und Consulting GmbH
> +#
> +# SPDX-License-Identifier:	GPL-2.0+
> +#
> +
> +obj-y += tiger_rk3588.o
> +ifneq ($(CONFIG_SPL_BUILD),y)
> +obj-y	+= ../common/common.o
> +endif
> diff --git a/board/theobroma-systems/tiger_rk3588/tiger_rk3588.c b/board/theobroma-systems/tiger_rk3588/tiger_rk3588.c
> new file mode 100644
> index 00000000000..a6d44f10db3
> --- /dev/null
> +++ b/board/theobroma-systems/tiger_rk3588/tiger_rk3588.c
> @@ -0,0 +1,53 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * (C) Copyright 2023 Theobroma Systems Design und Consulting GmbH
> + */
> +
> +#include <phy.h>
> +#include <eth_phy.h>
> +
> +#include <asm/types.h>
> +#include <asm/arch-rockchip/cru_rk3588.h>
> +#include <asm/arch-rockchip/hardware.h>
> +#include <asm/arch-rockchip/ioc_rk3588.h>
> +#include <asm-generic/u-boot.h>
> +#include <dm/device.h>
> +#include <dm/uclass-id.h>
> +#include <linux/bitfield.h>
> +
> +#include "../common/common.h"
> +
> +#define GPIO2C3_SEL_MASK		GENMASK(15, 12)
> +#define GPIO2C3_ETH0_REFCLKO_25M	FIELD_PREP(GPIO2C3_SEL_MASK, 1)
> +
> +#define REFCLKO25M_ETH0_OUT_SEL_MASK	BIT(15)
> +#define REFCLKO25M_ETH0_OUT_SEL_CPLL	FIELD_PREP(REFCLKO25M_ETH0_OUT_SEL_MASK, 1)
> +#define REFCLKO25M_ETH0_OUT_DIV_MASK	GENMASK(14, 8)
> +#define REFCLKO25M_ETH0_OUT_DIV(x)	FIELD_PREP(REFCLKO25M_ETH0_OUT_DIV_MASK, (x) - 1)
> +
> +#define REFCLKO25M_ETH0_OUT_EN		BIT(4)
> +
> +void setup_eth0refclko(void)
> +{
> +	/* Configure and enable ETH0_REFCLKO_25MHz */
> +	static struct rk3588_bus_ioc * const bus_ioc = (void *)BUS_IOC_BASE;
> +	static struct rk3588_cru * const cru = (void *)CRU_BASE;
> +
> +	/* 1. Pinmux */
> +	rk_clrsetreg(&bus_ioc->gpio2c_iomux_sel_l, GPIO2C3_SEL_MASK, GPIO2C3_ETH0_REFCLKO_25M);
> +	/* 2. Parent clock selection + divider => CPLL (1.5GHz) / 60 => 25MHz */
> +	rk_clrsetreg(&cru->clksel_con[15],
> +		     REFCLKO25M_ETH0_OUT_SEL_MASK | REFCLKO25M_ETH0_OUT_DIV_MASK,
> +		     REFCLKO25M_ETH0_OUT_SEL_CPLL | REFCLKO25M_ETH0_OUT_DIV(60));
> +	/* 3. Enable clock */
> +	rk_clrreg(&cru->clkgate_con[5], REFCLKO25M_ETH0_OUT_EN);
> +}
> +
> +int rockchip_early_misc_init_r(void)
> +{
> +	setup_boottargets();
> +
> +	setup_eth0refclko();
> +
> +	return 0;
> +}
> diff --git a/configs/tiger-rk3588_defconfig b/configs/tiger-rk3588_defconfig
> new file mode 100644
> index 00000000000..8fcdd063a3d
> --- /dev/null
> +++ b/configs/tiger-rk3588_defconfig
> @@ -0,0 +1,113 @@
> +CONFIG_ARM=y
> +CONFIG_SKIP_LOWLEVEL_INIT=y
> +CONFIG_COUNTER_FREQUENCY=24000000
> +CONFIG_ARCH_ROCKCHIP=y
> +CONFIG_SPL_GPIO=y
> +CONFIG_SF_DEFAULT_SPEED=24000000
> +CONFIG_SF_DEFAULT_MODE=0x2000
> +CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3588-tiger-haikou"
> +CONFIG_ROCKCHIP_RK3588=y
> +CONFIG_ROCKCHIP_BOOT_MODE_REG=0x0
> +CONFIG_SPL_SERIAL=y
> +CONFIG_TARGET_TIGER_RK3588=y
> +CONFIG_DEBUG_UART_BASE=0xfeb50000
> +CONFIG_DEBUG_UART_CLOCK=24000000
> +# CONFIG_DEBUG_UART_BOARD_INIT is not set
> +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_BOOTMETH_VBE is not set
> +CONFIG_LEGACY_IMAGE_FORMAT=y
> +CONFIG_DEFAULT_FDT_FILE="rockchip/rk3588-tiger-haikou.dtb"
> +# CONFIG_DISPLAY_CPUINFO is not set
> +CONFIG_DISPLAY_BOARDINFO_LATE=y
> +CONFIG_CYCLIC=y
> +CONFIG_SPL_MAX_SIZE=0x40000
> +CONFIG_SPL_PAD_TO=0x7f8000
> +# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
> +CONFIG_SPL_ATF=y
> +# CONFIG_BOOTM_NETBSD is not set
> +# CONFIG_BOOTM_PLAN9 is not set
> +# CONFIG_BOOTM_RTEMS is not set
> +# CONFIG_BOOTM_VXWORKS is not set
> +# CONFIG_CMD_ELF is not set
> +CONFIG_CMD_ADC=y
> +CONFIG_CMD_GPIO=y
> +CONFIG_CMD_GPT=y
> +CONFIG_CMD_I2C=y
> +# CONFIG_CMD_LOADB is not set
> +# CONFIG_CMD_LOADS is not set
> +CONFIG_CMD_MMC=y
> +# CONFIG_CMD_SF is not set
> +CONFIG_CMD_USB=y
> +# CONFIG_CMD_SETEXPR is not set
> +# CONFIG_CMD_MII is not set
> +# CONFIG_CMD_BLOCK_CACHE is not set
> +# CONFIG_CMD_EFICONFIG is not set
> +CONFIG_CMD_PMIC=y
> +CONFIG_CMD_REGULATOR=y
> +CONFIG_CMD_EROFS=y
> +CONFIG_CMD_SQUASHFS=y
> +# CONFIG_SPL_DOS_PARTITION is not set
> +CONFIG_SPL_OF_CONTROL=y
> +CONFIG_OF_LIVE=y
> +# CONFIG_OF_TAG_MIGRATE is not set
> +CONFIG_OF_SPL_REMOVE_PROPS="interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
> +CONFIG_ENV_OVERWRITE=y
> +CONFIG_ENV_IS_IN_MMC=y
> +CONFIG_SYS_RELOC_GD_ENV_ADDR=y
> +CONFIG_SPL_DM_SEQ_ALIAS=y
> +CONFIG_SPL_REGMAP=y
> +CONFIG_SPL_SYSCON=y
> +CONFIG_BUTTON=y
> +CONFIG_BUTTON_GPIO=y
> +CONFIG_SPL_CLK=y
> +CONFIG_CLK_GPIO=y
> +CONFIG_ROCKCHIP_GPIO=y
> +CONFIG_SYS_I2C_ROCKCHIP=y
> +CONFIG_MISC=y
> +CONFIG_SUPPORT_EMMC_RPMB=y
> +CONFIG_MMC_IO_VOLTAGE=y
> +CONFIG_SPL_MMC_IO_VOLTAGE=y
> +CONFIG_MMC_UHS_SUPPORT=y
> +CONFIG_SPL_MMC_UHS_SUPPORT=y
> +CONFIG_MMC_HS400_ES_SUPPORT=y
> +CONFIG_SPL_MMC_HS400_ES_SUPPORT=y
> +CONFIG_MMC_HS400_SUPPORT=y
> +CONFIG_SPL_MMC_HS400_SUPPORT=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_SPI_FLASH is not set
> +CONFIG_SF_DEFAULT_BUS=5
> +CONFIG_PHY_MICREL=y
> +CONFIG_PHY_MICREL_KSZ90X1=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_PHY_ROCKCHIP_USBDP=y
> +CONFIG_SPL_PINCTRL=y
> +CONFIG_DM_PMIC=y
> +CONFIG_PMIC_RK8XX=y
> +CONFIG_REGULATOR_RK8XX=y
> +CONFIG_SPL_RAM=y
> +CONFIG_SCSI=y
> +CONFIG_DEBUG_UART_SHIFT=2
> +CONFIG_SYS_NS16550_MEM32=y
> +CONFIG_ROCKCHIP_SPI=y
> +CONFIG_SYSRESET=y
> +CONFIG_USB=y
> +CONFIG_USB_XHCI_HCD=y
> +CONFIG_USB_EHCI_HCD=y
> +CONFIG_USB_EHCI_GENERIC=y
> +CONFIG_USB_OHCI_HCD=y
> +CONFIG_USB_OHCI_GENERIC=y
> +CONFIG_USB_DWC3=y
> +CONFIG_USB_DWC3_GENERIC=y
> +CONFIG_ERRNO_STR=y
> diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
> index fec8675c8be..eaf71673b7f 100644
> --- a/doc/board/rockchip/rockchip.rst
> +++ b/doc/board/rockchip/rockchip.rst
> @@ -131,6 +131,7 @@ List of mainline supported Rockchip boards:
>        - Radxa ROCK 5B (rock5b-rk3588)
>        - Rockchip Toybrick TB-RK3588X (toybrick-rk3588)
>        - Theobroma Systems RK3588-SBC Jaguar (jaguar-rk3588)
> +     - Theobroma Systems SOM-RK3588-Q7 - Tiger (tiger-rk3588)
>        - Turing Machines RK1 (turing-rk1-rk3588)
>        - Xunlong Orange Pi 5 (orangepi-5-rk3588s)
>        - Xunlong Orange Pi 5 Plus (orangepi-5-plus-rk3588)
> diff --git a/doc/board/theobroma-systems/index.rst b/doc/board/theobroma-systems/index.rst
> index b4da2616c37..73e07f7ebfa 100644
> --- a/doc/board/theobroma-systems/index.rst
> +++ b/doc/board/theobroma-systems/index.rst
> @@ -9,3 +9,4 @@ Theobroma Systems
>      jaguar_rk3588
>      puma_rk3399
>      ringneck_px30
> +   tiger_rk3588
> diff --git a/doc/board/theobroma-systems/tiger_rk3588.rst b/doc/board/theobroma-systems/tiger_rk3588.rst
> new file mode 100644
> index 00000000000..a73eec7fb9b
> --- /dev/null
> +++ b/doc/board/theobroma-systems/tiger_rk3588.rst
> @@ -0,0 +1,102 @@
> +.. SPDX-License-Identifier: GPL-2.0+
> +
> +SOM-RK3588-Q7 Tiger
> +===================
> +
> +The RK3588-Q7 SoM is a Qseven-compatible (70mm x 70mm, MXM-230
> +connector) system-on-module from Theobroma Systems, featuring the
> +Rockchip RK3588.
> +
> +It provides the following feature set:
> + * up to 16GB LPDDR4x
> + * on-module eMMC
> + * SD card (on a baseboard) via edge connector
> + * Gigabit Ethernet with on-module GbE PHY
> + * HDMI/eDP
> + * MIPI-DSI
> + * 4x MIPI-CSI (3x on FPC connectors, 1x over Q7)
> + * HDMI input over FPC connector
> + * CAN
> + * USB
> +   - 1x USB 3.0 dual-role (direct connection)
> +   - 2x USB 3.0 host + 1x USB 2.0 host
> + * PCIe
> +   - 1x PCIe 2.1 Gen3, 4 lanes
> +   - 2xSATA / 2x PCIe 2.1 Gen1, 2 lanes
> + * on-module ATtiny816 companion controller, implementing:
> +   - low-power RTC functionality (ISL1208 emulation)
> +   - fan controller (AMC6821 emulation)
> + * on-module Secure Element with Global Platform 2.2.1 compliant
> +   JavaCard environment
> +
> +Here is the step-by-step to boot to U-Boot on SOM-RK3588-Q7 Tiger from Theobroma
> +Systems.
> +
> +Get the TF-A and DDR init (TPL) binaries
> +----------------------------------------
> +
> +.. prompt:: bash
> +
> +   git clone https://github.com/rockchip-linux/rkbin
> +   cd rkbin
> +   export RKBIN=$(pwd)
> +   export BL31=$RKBIN/bin/rk35/rk3588_bl31_v1.38.elf
> +   export ROCKCHIP_TPL=$RKBIN/bin/rk35/rk3588_ddr_lp4_2112MHz_lp5_2736MHz_v1.11.bin
> +   sed -i 's/^uart baudrate=.*$/uart baudrate=115200/' tools/ddrbin_param.txt
> +   sed -i 's/^uart iomux=.*$/uart iomux=2/' tools/ddrbin_param.txt
> +   ./tools/ddrbin_tool tools/ddrbin_param.txt "$ROCKCHIP_TPL"
> +   ./tools/boot_merger RKBOOT/RK3588MINIALL.ini
> +   export RKDB=$RKBIN/rk3588_spl_loader_v1.11.112.bin
> +
> +This will setup all required external dependencies for compiling U-Boot. This will
> +be updated in the future once upstream Trusted-Firmware-A supports RK3588 or U-Boot
> +gains support for open-source DRAM initialization in TPL.
> +
> +Build U-Boot
> +------------
> +
> +.. prompt:: bash
> +
> +   cd ../u-boot
> +   make CROSS_COMPILE=aarch64-linux-gnu- tiger-rk3588_defconfig all
> +
> +This will build ``u-boot-rockchip.bin`` which can be written to an MMC device
> +(eMMC or SD card).
> +
> +Flash the image
> +---------------
> +
> +Copy ``u-boot-rockchip.bin`` to offset 32k for SD/eMMC.
> +
> +SD-Card
> +~~~~~~~
> +
> +.. prompt:: bash
> +
> +   dd if=u-boot-rockchip.bin of=/dev/sdX seek=64
> +
> +.. note::
> +
> +   Replace ``/dev/sdX`` to match your SD card kernel device.
> +
> +eMMC
> +~~~~
> +
> +``rkdeveloptool`` allows to flash the on-board eMMC via the USB OTG interface
> +with help of the Rockchip loader binary.
> +
> +To enter the USB flashing mode on Haikou baseboard, remove any SD card, insert a
> +micro-USB cable in the ``Q7 USB P1`` connector (P8), move ``SW5`` switch into
> +``BIOS Disable`` mode, power cycle or reset the board and move ``SW5`` switch
> +back to ``Normal Boot`` mode. A new USB device should have appeared on your PC
> +(check with ``lsusb -d 2207:350b``).
> +
> +To flash U-Boot on the eMMC with ``rkdeveloptool``:
> +
> +.. prompt:: bash
> +
> +   git clone https://github.com/rockchip-linux/rkdeveloptool
> +   cd rkdeveloptool
> +   autoreconf -i && CPPFLAGS=-Wno-format-truncation ./configure && make
> +   ./rkdeveloptool db "$RKDB"
> +   ./rkdeveloptool wl 64 ../u-boot-rockchip.bin
> diff --git a/include/configs/tiger_rk3588.h b/include/configs/tiger_rk3588.h
> new file mode 100644
> index 00000000000..7a32adfaf2a
> --- /dev/null
> +++ b/include/configs/tiger_rk3588.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Copyright (c) 2023 Theobroma Systems Design und Consulting GmbH
> + */
> +
> +#ifndef __TIGER_RK3588_H
> +#define __TIGER_RK3588_H
> +
> +#define ROCKCHIP_DEVICE_SETTINGS \
> +		"stdout=serial,vidconsole\0" \
> +		"stderr=serial,vidconsole\0"
> +
> +#include <configs/rk3588_common.h>
> +
> +#endif /* __TIGER_RK3588_H */
>