[PATCH 2/5] brppt1: Fix SPL boot stage

[Wolfgang Wallner]

From: Bernhard Messerklinger <bernhard.messerklinger at br-automation.com>
Sent: Thursday, August 25, 2022 8:54
Subject: [PATCH 2/5] brppt1: Fix SPL boot stage 
 
> Commit 6337d53fdf45 ("arm: dts: sync am33xx with Linux 5.9-rc7") syncs
> the am335x device tree with the latest linux kernel am335x device tree.
> That causes problems with device tree in SPL stage.
> To fix the issues CONFIG_SPL_OF_TRANSLATE must be set to handle the
> synced bus addresses correctly.
> A custom U-Boot device tree is also needed since the SPL build removes
> bus properties from bus nodes which are not explicitly marked with the
> u-boot,dm-spl or u-boot,dm-pre-reloc flag. Therefore all parent buses of
> the in the SPL needed devices must be marked with u-boot,dm-pre-reloc.
> Also since there is no driver for "ti,sysc" compatible property in SPL
> the buses marked with this compatible string must also be marked with
> compatible = "simple-bus" to make the underlying devices visible in
> SPL. Otherwise the matching device drivers aren't found and the uclass
> drivers are dropped.
> 
> Signed-off-by: Bernhard Messerklinger <bernhard.messerklinger at br-automation.com>
> ---
> 
>  arch/arm/dts/am335x-brppt1-mmc-u-boot.dtsi | 80 ++++++++++++++++++++++
>  configs/brppt1_mmc_defconfig               |  2 +-
>  2 files changed, 81 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/dts/am335x-brppt1-mmc-u-boot.dtsi

Reviewed-by: Wolfgang Wallner <wolfgang.wallner at br-automation.com>