[PATCH 4/4] rockchip: rk3399: Add support for chromebook_kevin

[Simon Glass]

Hi Alper,

On Thu, 25 Nov 2021 at 10:40, Alper Nebi Yasak <alpernebiyasak at gmail.com> wrote:
>
> From: "Marty E. Plummer" <hanetzer at startmail.com>
>
> Add support for Kevin, an RK3399-based convertible chromebook that is
> very similar to Bob. This patch is mostly based on existing support for
> Bob, with only minor changes for Kevin-specific things.
>
> Unlike other Gru boards, coreboot sets Kevin's center logic to 925 mV,
> so adjust it here in the dts as well. The rk3399-gru-kevin devicetree
> has an unknown event code reference which has to be defined, set it
> to the Linux counterpart. The new defconfig is copied from Bob with the
> diffconfig:
>
>      DEFAULT_DEVICE_TREE "rk3399-gru-bob" -> "rk3399-gru-kevin"
>      DEFAULT_FDT_FILE "rockchip/rk3399-gru-bob.dtb" -> "rockchip/rk3399-gru-kevin.dtb"
>      VIDEO_ROCKCHIP_MAX_XRES 1280 -> 2400
>      VIDEO_ROCKCHIP_MAX_YRES 800 -> 1600
>     +TARGET_CHROMEBOOK_KEVIN y
>
> With this Kevin can boot from SPI flash to a usable U-Boot prompt on the
> display with the keyboard working, but cannot boot into Linux for
> unknown reasons.
>
> eMMC starts in a working state but fails to re-init, microSD card works
> but at a lower-than-expected speed, USB works but causes a hang on
> de-init. There are known workarounds to solve eMMC and USB issues.
>
> Cc: Marty E. Plummer <hanetzer at startmail.com>
> Cc: Simon Glass <sjg at chromium.org>
> [Alper: commit message, resync config with Bob, update MAINTAINERS,
>         add to Rockchip doc, add Kconfig help message, set regulator]
> Co-developed-by: Alper Nebi Yasak <alpernebiyasak at gmail.com>
> Signed-off-by: Alper Nebi Yasak <alpernebiyasak at gmail.com>
> ---
> Marty had signed-off an earlier version of this [1], but not the updated
> version I continued on top of [2]. So I'm not sure if I can add his
> sign-off to this as is, and I hope he can reply to this with a sign-off.
>
> [1] https://patchwork.ozlabs.org/patch/1053386/
> [2] https://patchwork.ozlabs.org/comment/2488899/
>
>  arch/arm/dts/Makefile                         |   1 +
>  arch/arm/dts/rk3399-gru-kevin-u-boot.dtsi     |  11 ++
>  arch/arm/mach-rockchip/rk3399/Kconfig         |  11 ++
>  arch/arm/mach-rockchip/rk3399/rk3399.c        |   4 +-
>  arch/arm/mach-rockchip/spl.c                  |   3 +-
>  board/google/gru/Kconfig                      |  16 +++
>  board/google/gru/MAINTAINERS                  |   8 ++
>  board/google/gru/gru.c                        |   2 +-
>  configs/chromebook_kevin_defconfig            | 116 ++++++++++++++++++
>  doc/board/rockchip/rockchip.rst               |   1 +
>  include/dt-bindings/input/linux-event-codes.h |   3 +-
>  11 files changed, 171 insertions(+), 5 deletions(-)
>  create mode 100644 arch/arm/dts/rk3399-gru-kevin-u-boot.dtsi
>  create mode 100644 configs/chromebook_kevin_defconfig

This needs a rebase on next, just for a change in rk3399.c but I
suppose it could be done when applying.

Regards,
Simon