From: Bernhard Messerklinger bernhard.messerklinger@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@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@br-automation.com