[PATCH 00/12] Support to run U-Boot on sc7180 Trogdor Chromebooks

[Caleb Connolly]

Hi Stephen,

On 2/20/25 20:58, Stephen Boyd wrote:
> This series supports running U-Boot as a payload on sc7180 Trogdor
> Chromebooks like Lazor or Wormdingler. This is a jumble of different
> patches to get to the final goal of booting a Linux distro from the eMMC
> on Lazor. I've yet to craft a USB stick with a stock distro but I'll
> probably do that next week.

\o/ wow, this is awesome!

you might have some luck booting pmOS, we build depthcharge compatible 
images for trogdor

https://images.postmarketos.org/bpo/edge/google-trogdor/

There's also a generic ARM64 EFI image that should work. You may need to 
edit the image and remove efi/systemd/drivers/dtbloader.efi from the ESP:

https://images.postmarketos.org/bpo/edge/postmarketos-trailblazer/

> 
> The first few patches add support for the particular SoC sc7180 used on
> Trogdor devices. The next set of patches move the coreboot logic out of
> x86 into lib to find the coreboot tables on ARM and stash them in global
> data. Then I have a handful of patches to let the coreboot commands and
> utilities parse and populate various things like pstore and DT with the
> proper data from the coreboot tables. Finally, I add the calls to
> coreboot dram parsing code in the snapdragon board so that if coreboot
> tables exist we get the memory info from coreboot instead of from an
> earlier stage DTB.
> 
> I tested the spi driver with the crosec command. The cros bootflow
> method almost works, but it seems like chromeos userspace blows up
> spectacularly likely because crossystem can't figure out what board it
> is running on. I don't really care too much about booting chromeos
> userspace here so I'm going to ignore that problem and assume that I can
> boot some Linux distro because the eMMC can be read by U-Boot and the
> kernel boots.

Guess it's time I finally get my hands on one of these devices :D

Kind regards,
> 
> Stephen Boyd (12):
>    clk: qcom: Add driver for sc7180
>    pinctrl: qcom: Add driver for sc7180
>    spi: Add Qualcomm GENI SPI driver
>    coreboot: Move coreboot logic out of x86 to a generic place
>    arm: Support running U-Boot as a coreboot payload on ARM64
>    cmd/cbsysinfo: Skip the CMOS 'option_table' if it isn't present
>    cmd/cbsysinfo: Allow on ARM as well
>    coreboot: Parse sku_id/fw_config from coreboot tables
>    pstore: Add pstore address from coreboot tables
>    coreboot: Add /firmware/coreboot node to DT
>    bootstd: cros: Return negative error code
>    mach-snapdragon: Support booting as a coreboot payload
> 
>   arch/arm/Kconfig                              |   2 +
>   arch/arm/cpu/armv8/Makefile                   |   1 +
>   arch/arm/cpu/armv8/coreboot/Kconfig           |  22 +
>   arch/arm/cpu/armv8/coreboot/Makefile          |   4 +
>   arch/arm/cpu/armv8/coreboot/cpu.c             |  46 ++
>   arch/arm/include/asm/global_data.h            |   3 +
>   arch/arm/mach-snapdragon/board.c              |  18 +
>   arch/x86/Kconfig                              |  21 -
>   arch/x86/cpu/coreboot/coreboot.c              |   4 +-
>   arch/x86/cpu/coreboot/sdram.c                 |  78 +--
>   arch/x86/cpu/coreboot/timestamp.c             |   2 +-
>   arch/x86/cpu/cpu.c                            |   2 +-
>   arch/x86/cpu/i386/cpu.c                       |   2 +-
>   .../x86/include/asm/arch-coreboot/timestamp.h |   2 +-
>   arch/x86/lib/coreboot/Makefile                |   1 -
>   arch/x86/lib/coreboot/cb_support.c            |   2 +-
>   arch/x86/lib/coreboot_table.c                 |   2 +-
>   arch/x86/lib/tables.c                         |   2 +-
>   board/coreboot/coreboot/coreboot.c            |   2 +-
>   board/coreboot/coreboot/sysinfo.c             |   2 +-
>   board/google/chromebook_coral/coral.c         |   2 +-
>   boot/bootmeth_cros.c                          |   2 +-
>   boot/expo_build_cb.c                          |   2 +-
>   boot/image-fdt.c                              |   4 +
>   cmd/Kconfig                                   |   2 +-
>   cmd/Makefile                                  |   1 +
>   cmd/{x86 => }/cbsysinfo.c                     |   6 +-
>   cmd/pstore.c                                  |  44 +-
>   cmd/version.c                                 |   2 +-
>   cmd/x86/Makefile                              |   1 -
>   cmd/x86/cbcmos.c                              |   2 +-
>   drivers/clk/qcom/Kconfig                      |   8 +
>   drivers/clk/qcom/Makefile                     |   1 +
>   drivers/clk/qcom/clock-sc7180.c               | 150 +++++
>   drivers/misc/cbmem_console.c                  |   2 +-
>   drivers/pinctrl/qcom/Kconfig                  |   7 +
>   drivers/pinctrl/qcom/Makefile                 |   1 +
>   drivers/pinctrl/qcom/pinctrl-sc7180.c         | 106 ++++
>   drivers/serial/serial_coreboot.c              |   2 +-
>   drivers/spi/Kconfig                           |  10 +
>   drivers/spi/Makefile                          |   1 +
>   drivers/spi/spi-geni-qcom.c                   | 527 ++++++++++++++++++
>   drivers/video/coreboot.c                      |   2 +-
>   .../x86/include/asm => include}/cb_sysinfo.h  |  12 +-
>   .../include/asm => include}/coreboot_tables.h |  11 +
>   lib/Kconfig                                   |  21 +
>   lib/Makefile                                  |   2 +
>   lib/coreboot/Makefile                         |   4 +
>   {arch/x86/lib => lib}/coreboot/cb_sysinfo.c   | 142 ++++-
>   {arch/x86/cpu => lib}/coreboot/sdram.c        |  15 +-
>   50 files changed, 1165 insertions(+), 145 deletions(-)
>   create mode 100644 arch/arm/cpu/armv8/coreboot/Kconfig
>   create mode 100644 arch/arm/cpu/armv8/coreboot/Makefile
>   create mode 100644 arch/arm/cpu/armv8/coreboot/cpu.c
>   rename cmd/{x86 => }/cbsysinfo.c (99%)
>   create mode 100644 drivers/clk/qcom/clock-sc7180.c
>   create mode 100644 drivers/pinctrl/qcom/pinctrl-sc7180.c
>   create mode 100644 drivers/spi/spi-geni-qcom.c
>   rename {arch/x86/include/asm => include}/cb_sysinfo.h (95%)
>   rename {arch/x86/include/asm => include}/coreboot_tables.h (98%)
>   create mode 100644 lib/coreboot/Makefile
>   rename {arch/x86/lib => lib}/coreboot/cb_sysinfo.c (75%)
>   copy {arch/x86/cpu => lib}/coreboot/sdram.c (87%)
> 
> 
> base-commit: 82d262ae162d859d3b0bbcd40a9464e890b009da

-- 
Caleb (they/them)