[PATCH v2 0/9] New boards support: db845c and qcs404-evb

[Sumit Garg]

Hi Peng,

On Tue, 12 Jul 2022 at 06:27, Peng Fan <peng.fan at oss.nxp.com> wrote:
>
>
>
> On 7/8/2022 9:13 PM, Sumit Garg wrote:
> > Add support for two new boards db845c and qcs404-evb:
> > - db845c is a 96boards compliant platform aka RB3 based on Qualcomm
> >    SDM845 SoC.
> > - qcs404-evb is an evaluation board from Qualcomm based on QCS404 SoC.
> >
> > Both these platforms have one thing in common that u-boot is chain-loaded
> > in 64-bit mode via Android Boot Loader (ABL) which is an EFI application.
> > For further details on chain-loading refer to platform specific
>
> Just curious about the flow:
> ABL(an EFI applicaiton)->load U-Boot->start U-Boot? or you mean U-Boot
> run as EFI application?
>

Here you can think of u-boot as just a replacement of the kernel image
within the boot.img. U-boot already has a provision for
LINUX_KERNEL_IMAGE_HEADER [1] which makes it look like a kernel image.
Boot chain:

XBL (edk2 proprietary source code) -> ABL(an EFI applicaiton) ->
U-boot (part of boot.img as a replacement of kernel) -> FIT image
(part of boot.img as a replacement of ramdisk)

Also, the final stage is configurable as u-boot allows interactions
with various media (eMMC, USB (WIP), network (WIP) etc.)

[1] https://source.denx.de/u-boot/u-boot/-/blob/master/arch/arm/Kconfig#L82

-Sumit

> THanks,
> Peng.
>
> > documentation:
> > - doc/board/qualcomm/sdm845.rst
> > - doc/board/qualcomm/qcs404.rst
> >
> > Changes in v2:
> > - Added patch #1 to fix DT node overrides in starqltechn-uboot.dtsi.
> > - Updated patch #2 commit description.
> > - Fixed a typo (s/96Board/96Boards/) in patch #5.
> >
> > Sumit Garg (9):
> >    board: starqltechn: Align DT node overrides with sdm845.dtsi
> >    arm64: dts: sdm845: Remove redundant u-boot DT properties
> >    clocks: sdm845: Import qcom,gcc-sdm845.h
> >    uart: sdm845: Fix debug UART pinmux
> >    board: qualcomm: Add support for dragonboard845c
> >    mmc: msm_sdhci: Add SDCC version 5.0.0 support
> >    pinctrl: qcom: Add pinctrl driver for QCS404 SoC
> >    clocks: qcom: Add clock driver for QCS404 SoC
> >    board: qualcomm: Add support for QCS404 EVB
> >
> >   arch/arm/dts/Makefile                         |   1 +
> >   arch/arm/dts/dragonboard845c-uboot.dtsi       |  37 +++
> >   arch/arm/dts/dragonboard845c.dts              |  44 ++++
> >   arch/arm/dts/qcs404-evb-uboot.dtsi            |  24 ++
> >   arch/arm/dts/qcs404-evb.dts                   |  81 ++++++
> >   arch/arm/dts/sdm845.dtsi                      |   8 +-
> >   arch/arm/dts/starqltechn-uboot.dtsi           |  18 +-
> >   arch/arm/dts/starqltechn.dts                  |   2 +-
> >   arch/arm/mach-snapdragon/Kconfig              |  25 ++
> >   arch/arm/mach-snapdragon/Makefile             |   3 +
> >   arch/arm/mach-snapdragon/clock-qcs404.c       |  30 +++
> >   arch/arm/mach-snapdragon/clock-sdm845.c       |   3 +-
> >   arch/arm/mach-snapdragon/clock-snapdragon.c   |   1 +
> >   .../include/mach/sysmap-qcs404.h              |  13 +
> >   arch/arm/mach-snapdragon/pinctrl-qcs404.c     |  55 ++++
> >   arch/arm/mach-snapdragon/pinctrl-snapdragon.c |   1 +
> >   arch/arm/mach-snapdragon/pinctrl-snapdragon.h |   1 +
> >   arch/arm/mach-snapdragon/sysmap-qcs404.c      |  31 +++
> >   board/qualcomm/dragonboard845c/Kconfig        |  12 +
> >   board/qualcomm/dragonboard845c/MAINTAINERS    |   6 +
> >   board/qualcomm/dragonboard845c/Makefile       |   9 +
> >   board/qualcomm/dragonboard845c/db845c.its     |  63 +++++
> >   .../dragonboard845c/dragonboard845c.c         |   9 +
> >   board/qualcomm/qcs404-evb/Kconfig             |  15 ++
> >   board/qualcomm/qcs404-evb/MAINTAINERS         |   6 +
> >   board/qualcomm/qcs404-evb/Makefile            |   6 +
> >   board/qualcomm/qcs404-evb/qcs404-evb.c        |  33 +++
> >   board/qualcomm/qcs404-evb/qcs404-evb.its      |  64 +++++
> >   configs/dragonboard845c_defconfig             |  28 ++
> >   configs/qcs404evb_defconfig                   |  39 +++
> >   doc/board/qualcomm/index.rst                  |   1 +
> >   doc/board/qualcomm/qcs404.rst                 |  79 ++++++
> >   doc/board/qualcomm/sdm845.rst                 | 100 ++++++-
> >   drivers/mmc/msm_sdhci.c                       |  96 ++++---
> >   include/configs/dragonboard845c.h             |  28 ++
> >   include/configs/qcs404-evb.h                  |  27 ++
> >   include/dt-bindings/clock/qcom,gcc-qcs404.h   | 180 +++++++++++++
> >   include/dt-bindings/clock/qcom,gcc-sdm845.h   | 246 ++++++++++++++++++
> >   38 files changed, 1363 insertions(+), 62 deletions(-)
> >   create mode 100644 arch/arm/dts/dragonboard845c-uboot.dtsi
> >   create mode 100644 arch/arm/dts/dragonboard845c.dts
> >   create mode 100644 arch/arm/dts/qcs404-evb-uboot.dtsi
> >   create mode 100644 arch/arm/dts/qcs404-evb.dts
> >   create mode 100644 arch/arm/mach-snapdragon/clock-qcs404.c
> >   create mode 100644 arch/arm/mach-snapdragon/include/mach/sysmap-qcs404.h
> >   create mode 100644 arch/arm/mach-snapdragon/pinctrl-qcs404.c
> >   create mode 100644 arch/arm/mach-snapdragon/sysmap-qcs404.c
> >   create mode 100644 board/qualcomm/dragonboard845c/Kconfig
> >   create mode 100644 board/qualcomm/dragonboard845c/MAINTAINERS
> >   create mode 100644 board/qualcomm/dragonboard845c/Makefile
> >   create mode 100644 board/qualcomm/dragonboard845c/db845c.its
> >   create mode 100644 board/qualcomm/dragonboard845c/dragonboard845c.c
> >   create mode 100644 board/qualcomm/qcs404-evb/Kconfig
> >   create mode 100644 board/qualcomm/qcs404-evb/MAINTAINERS
> >   create mode 100644 board/qualcomm/qcs404-evb/Makefile
> >   create mode 100644 board/qualcomm/qcs404-evb/qcs404-evb.c
> >   create mode 100644 board/qualcomm/qcs404-evb/qcs404-evb.its
> >   create mode 100644 configs/dragonboard845c_defconfig
> >   create mode 100644 configs/qcs404evb_defconfig
> >   create mode 100644 doc/board/qualcomm/qcs404.rst
> >   create mode 100644 include/configs/dragonboard845c.h
> >   create mode 100644 include/configs/qcs404-evb.h
> >   create mode 100644 include/dt-bindings/clock/qcom,gcc-qcs404.h
> >   create mode 100644 include/dt-bindings/clock/qcom,gcc-sdm845.h
> >