[PATCH u-boot-marvell 09/16] arm: mvebu: Enable BootROM output on A38x

Pali Rohár pali at kernel.org
Tue Dec 21 16:54:09 CET 2021

BootROMs on pre-A38x SoCs enabled its output on UART by default, but A38x'
BootROM has its output on UART disabled by default.

To enable BootROM output on A38x SoC, it is required to set DEBUG flag
(which only enables BootROM output and nothing more) in kwbimage. For UART
images this DEBUG flag is ignored by BootROM.

Enable kwbimage DEBUG flag for all A38x boards.

With this change BootROM prints the following (success) information on UART
before booting U-Boot kwbimage:

  BootROM - 1.73
  Booting from SPI flash

Signed-off-by: Pali Rohár <pali at kernel.org>
Reviewed-by: Marek Behún <marek.behun at nic.cz>
 arch/arm/mach-mvebu/Makefile        | 7 +++++++
 arch/arm/mach-mvebu/kwbimage.cfg.in | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index 0fc638086ee5..4e15101a40cf 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -61,6 +61,13 @@ KWB_REPLACE += SEC_FUSE_DUMP
+# BootROM output is by default enabled on pre-A38x and disabled on A38x
+# DEBUG flag on A38x for non-UART boot source only enable BootROM output and nothing more
 quiet_cmd_kwbcfg = KWBCFG  $@
 cmd_kwbcfg = sed -ne '$(foreach V,$(KWB_REPLACE),s/\#@$(V)/$(V) $(KWB_CFG_$(V))/;)p' \
 	<$< >$(dir $@)$(@F)
diff --git a/arch/arm/mach-mvebu/kwbimage.cfg.in b/arch/arm/mach-mvebu/kwbimage.cfg.in
index 2791c21617b3..75f90766dda4 100644
--- a/arch/arm/mach-mvebu/kwbimage.cfg.in
+++ b/arch/arm/mach-mvebu/kwbimage.cfg.in
@@ -8,5 +8,8 @@ VERSION		1
 # Boot Media configurations
+# Enable BootROM output via DEBUG flag on SoCs which require it
 # Include U-Boot SPL with DDR3 training code into Binary Header
 BINARY spl/u-boot-spl.bin #@LOAD_ADDRESS

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