From 90f025b2762edbac0516cb42f4fc7c9c28f260fa Mon Sep 17 00:00:00 2001 From: Julius Werner Date: Tue, 24 Apr 2018 16:39:20 -0700 Subject: sdm845: Implement bitbang UART for bootblock This patch replaces the UART in the bootblock of SDM845 with a bitbang implementation. Since SDM845 hardware UART needs a firmware blob loaded into it before it becomes usable, it is not really suited for use in the bootblock (since by the time we can read blobs from SPI, the bootblock is essentially over anyway). This solution allows us to still have some console output during early SoC initialization. Change-Id: I0c252ec83a7993edce5c4debc687f1fdd0d7b36d Signed-off-by: Julius Werner Reviewed-on: https://review.coreboot.org/25813 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Aaron Durbin --- src/soc/qualcomm/sdm845/Makefile.inc | 1 + 1 file changed, 1 insertion(+) (limited to 'src/soc/qualcomm/sdm845/Makefile.inc') diff --git a/src/soc/qualcomm/sdm845/Makefile.inc b/src/soc/qualcomm/sdm845/Makefile.inc index 1fddb56345..e603177317 100644 --- a/src/soc/qualcomm/sdm845/Makefile.inc +++ b/src/soc/qualcomm/sdm845/Makefile.inc @@ -7,6 +7,7 @@ bootblock-y += spi.c bootblock-y += mmu.c bootblock-y += timer.c bootblock-y += gpio.c +bootblock-$(CONFIG_DRIVERS_UART) += uart_bitbang.c ################################################################################ verstage-y += spi.c -- cgit v1.2.3