[PATCH v3 6/6] board: add support for Schneider HMIBSC board

[Stephan Gerhold]

On Fri, Apr 05, 2024 at 02:37:42PM +0530, Sumit Garg wrote:
> Support for Schneider Electric HMIBSC. Features:
> - Qualcomm Snapdragon 410C SoC - APQ8016 (4xCortex A53, Adreno 306)
> - 2GiB RAM
> - 64GiB eMMC, SD slot
> - WiFi and Bluetooth
> - 2x Host, 1x Device USB port
> - HDMI
> - Discrete TPM2 chip over SPI
> 
> Features enabled in U-Boot:
> - RAUC updates
> - Environment protection
> - USB based ethernet adaptors
> 
> Signed-off-by: Sumit Garg <sumit.garg at linaro.org>

I don't think this is a big deal but this patch would be a bit easier to
skim over if you move the (unmodified?) import of the Linux
apq8016-schneider-hmibsc.dts to a separate patch with a clear note in
the commit message

 - where it comes from (link to Linux patch), and
 - that it can be removed again with a future update of the upstream DTs
   in U-Boot (once it is applied upstream at least).

You kind of have that information in the cover letter but I think it
would be good to have it in the commit message.

> ---
>  arch/arm/dts/apq8016-schneider-hmibsc.dts | 491 ++++++++++++++++++++++
>  board/schneider/hmibsc/MAINTAINERS        |   6 +
>  configs/hmibsc_defconfig                  |  86 ++++
>  doc/board/index.rst                       |   1 +
>  doc/board/schneider/hmibsc.rst            |  45 ++
>  doc/board/schneider/index.rst             |   9 +
>  include/configs/hmibsc.h                  |  57 +++
>  7 files changed, 695 insertions(+)
>  create mode 100644 arch/arm/dts/apq8016-schneider-hmibsc.dts
>  create mode 100644 board/schneider/hmibsc/MAINTAINERS
>  create mode 100644 configs/hmibsc_defconfig
>  create mode 100644 doc/board/schneider/hmibsc.rst
>  create mode 100644 doc/board/schneider/index.rst
>  create mode 100644 include/configs/hmibsc.h
> 
> [...]
> diff --git a/include/configs/hmibsc.h b/include/configs/hmibsc.h
> new file mode 100644
> index 00000000000..66dfa549ce1
> --- /dev/null
> +++ b/include/configs/hmibsc.h
> @@ -0,0 +1,57 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Board configuration file for HMIBSC
> + *
> + * (C) Copyright 2024 Sumit Garg <sumit.garg at linaro.org>
> + */
> +
> +#ifndef __CONFIGS_HMIBSC_H
> +#define __CONFIGS_HMIBSC_H
> +
> +/* PHY needs a longer aneg time */
> +#define PHY_ANEG_TIMEOUT		8000
> +
> +#define HMIBSC_BOOTCOMMAND \
> +	"setenv devtype mmc; setenv devnum 0; " \
> +	"test -n \"${BOOT_ORDER}\" || setenv BOOT_ORDER \"A B\"; " \
> +	"test -n \"${BOOT_A_LEFT}\" || setenv BOOT_A_LEFT 3; " \
> +	"test -n \"${BOOT_B_LEFT}\" || setenv BOOT_B_LEFT 3; " \
> +	"setenv raucslot; " \
> +	"for BOOT_SLOT in \"${BOOT_ORDER}\"; do " \
> +	"  if test \"x${raucslot}\" != \"x\"; then " \
> +	"      echo \"skip remaining slots...\"; " \
> +	"  elif test \"x${BOOT_SLOT}\" = \"xA\"; then " \
> +	"    if test ${BOOT_A_LEFT} -gt 0; then " \
> +	"      setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1; " \
> +	"      echo \"Found valid RAUC slot A\"; " \
> +	"      setenv raucslot \"rauc.slot=A\"; " \
> +	"      setenv raucpart A; setenv distro_bootpart 6;" \
> +	"    fi; " \
> +	"  elif test \"x${BOOT_SLOT}\" = \"xB\"; then " \
> +	"    if test ${BOOT_B_LEFT} -gt 0; then " \
> +	"      setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1; " \
> +	"      echo \"Found valid RAUC slot B\"; " \
> +	"      setenv raucslot \"rauc.slot=B\"; " \
> +	"      setenv raucpart B; setenv distro_bootpart 7;" \
> +	"    fi; " \
> +	"  fi; " \
> +	"done; " \
> +	"if test -n \"${raucslot}\"; then " \
> +	"  setenv bootargs console=ttyMSM1 root=PARTLABEL=rootfs_${raucpart} rw rootwait ${raucslot}; " \
> +	"  saveenv; " \
> +	"else " \
> +	"  echo \"No valid RAUC slot found. Resetting tries to 3\"; " \
> +	"  setenv BOOT_A_LEFT 3; " \
> +	"  setenv BOOT_B_LEFT 3; " \
> +	"  saveenv; " \
> +	"  reset; " \
> +	"fi; " \
> +	"load ${devtype} ${devnum}:${distro_bootpart} ${loadaddr} /boot/fitImage && bootm"
> +
> +#define CFG_EXTRA_ENV_SETTINGS \
> +	"loadaddr=0x90000000\0" \
> +	"bootcmd="	HMIBSC_BOOTCOMMAND		"\0"
> +

The "text-based environment" [1] is preferred nowadays, i.e. defining
these inside board/schneider/hmibsc/hmibsc.env instead (similar to how
DB410c has its environment defined in
board/qualcomm/dragonboard410c/dragonboard410c.env). This should also
avoid all the crazy escaping to encode it as C string. :D

However, I suspect that right now it would attempt to load this file
from board/qualcomm/hmibsc/hmibsc.env since you do not seem to have
CONFIG_SYS_VENDOR set correctly. It looks like Caleb removed the option
to customize CONFIG_SYS_VENDOR in commit 059d526af312 ("mach-snapdragon:
generalise board support"). It might be easiest to add a prompt in
arch/arm/mach-snapdragon/Kconfig to allow changing it (similar to
CONFIG_SYS_BOARD).

Thanks,
Stephan

[1]: https://docs.u-boot.org/en/latest/usage/environment.html#text-based-environment