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    Subject[PATCH 0/9] arm64: dts: rockchip: Initial Toybrick TB-RK1808M0 support
    Date
    Hello Heiko et al.,

    It seems linux-rockchip list only saw two RK1808 patches for ASoC in 2019.
    Following up on a SUSE Hackweek 20 project of mine, here's some patches that
    allow me to start booting into the TB-RK1808M0 mPCIe card's eMMC.

    Tested using its USB adapter, which allows to connect a serial cable and a
    USB storage device that I load kernel+dtb from. It has a reset button, and
    Ctrl+C allows to enter a U-Boot prompt (without EBBR/UEFI support though).

    Patches are based on the shipping toybrick.dtb file.
    http://t.rock-chips.com/en/wiki.php?mod=view&id=110 gives instructions for
    compiling sources, but no source download or link is actually provided.

    I encountered a hang: earlycon revealed it being related to KVM and vGIC.
    Disabling KVM in Kconfig works around it, as does removing the vGIC irq in DT.
    I've already tried low and high for the vGIC interrupt, so no clue what might
    cause it. On an mPCIe card with 1 GiB of RAM I figured KVM is not going to be
    a major use case, so if we find no other solution, we could just delete the
    interrupts property in its .dts, as demonstrated here.

    The TB-96AIoT 96Boards SoM would be another RK1808 platform someone might
    test these patches on. For the TB-RK1808S0 USB stick there's at least no
    documented way to access a serial console.

    Have a lot of fun!

    Cheers,
    Andreas

    Cc: devicetree@vger.kernel.org
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: Marc Zyngier <maz@kernel.org>

    Andreas Färber (9):
    dt-bindings: arm: rockchip: Add Rockchip RK1808 and TB-RK1808M0
    dt-bindings: serial: snps-dw-apb-uart: Add Rockchip RK1808
    arm64: dts: rockchip: Prepare Rockchip RK1808
    arm64: dts: rockchip: Add Rockchip TB-RK1808M0
    arm64: dts: rockchip: rk1808k-toybrick-m0: Suppress vGIC interrupt
    dt-bindings: mmc: rockchip-dw-mshc: Add Rockchip RK1808
    arm64: dts: rockchip: rk1808: Prepare eMMC node
    arm64: dts: rockchip: rk1808k-toybrick-m0: Enable eMMC
    arm64: dts: rockchip: rk1808: Add CPU operating points

    .../devicetree/bindings/arm/rockchip.yaml | 5 +
    .../bindings/mmc/rockchip-dw-mshc.yaml | 1 +
    .../bindings/serial/snps-dw-apb-uart.yaml | 1 +
    arch/arm64/boot/dts/rockchip/Makefile | 1 +
    arch/arm64/boot/dts/rockchip/rk1808.dtsi | 276 ++++++++++++++++++
    .../boot/dts/rockchip/rk1808k-toybrick-m0.dts | 97 ++++++
    6 files changed, 381 insertions(+)
    create mode 100644 arch/arm64/boot/dts/rockchip/rk1808.dtsi
    create mode 100644 arch/arm64/boot/dts/rockchip/rk1808k-toybrick-m0.dts

    --
    2.31.1

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