[PATCH v2 0/1] board: rockchip: add FriendlyElec NanoPC-T6 rk3588 board

[John Clark <inindev@gmail.com>]

Jonas, thank you for your detailed review.  The explanations for each of config change recommendations were especially helpful.

As for the CFG_IRAM_BASE / BROM_LAST_BOOTSOURCE issue, I have made a step forward, but expect I will be getting feedback as to a better approach.

Note: This patchset is based on Kever's most recent pull request "u-boot-rockchip-20231007" which, as of this writing, has yet to be merged upstream.

Finally, I would appreciate any insight as to FriendlyElec vs FriendlyARM naming.  Currently, I have documented this as the "FriendlyARM NanoPC-T6" but it would seem that it could also be called the "FriendlyElec NanoPC-T6" and be equally correct.  It is worth noting that u-boot currently contains support for the "FriendlyARM NanoPi2" board/friendlyarm/nanopi2 and thus my use of FriendlyARM.

Changes in v2:
- resync dt from:
    https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/plain/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dts?h=for-next
- config changes:
    -CONFIG_PCI_INIT_R=y
    -CONFIG_SYS_SPI_U_BOOT_OFFS=0x100000
    +CONFIG_SYS_SPI_U_BOOT_OFFS=0x60000
    -CONFIG_REGULATOR_PWM=y
    -# CONFIG_USB_XHCI_DWC3_OF_SIMPLE is not set
    -CONFIG_SPL_USB_DWC3_GENERIC=y
- added board files:
    create mode 100644 board/friendlyarm/nanopct6-rk3588/Kconfig
    create mode 100644 board/friendlyarm/nanopct6-rk3588/MAINTAINERS
    create mode 100644 board/friendlyarm/nanopct6-rk3588/Makefile
    create mode 100644 board/friendlyarm/nanopct6-rk3588/nanopct6-rk3588.c
    create mode 100644 include/configs/nanopct6-rk3588.h
- improved BROM_LAST_BOOTSOURCE handling for SPI NOR:
    if (CONFIG_IS_ENABLED(TARGET_NANOPCT6_RK3588) && bootdevice_brom_id == 4)
        bootdevice_ofpath = boot_devices[BROM_BOOTSOURCE_SPINOR];
    else
        bootdevice_ofpath = boot_devices[bootdevice_brom_id];

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2.42.0