[PATCH u-boot v2019.04-aspeed-openbmc v5 2/2] arm/mach-aspeed: Add support for CONFIG_ASPEED_ROUTE_UART5_TO_UART1

[Patrick Rudolph]

Introduce CONFIG_ASPEED_ROUTE_UART5_TO_UART1 and reuse existing
platform code to route UART5 to UART1.
This is required on IBM/Genesis3 as it uses UART5 as debug uart, but the
RXD1/TXD1 pins are connected instead of RXD5/TXD5.

Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
Reviewed-by: Joel Stanley <joel at jms.id.au>
---
 arch/arm/mach-aspeed/Kconfig            | 6 ++++++
 arch/arm/mach-aspeed/ast2500/platform.S | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig
index edb5520aec..50ea261dac 100644
--- a/arch/arm/mach-aspeed/Kconfig
+++ b/arch/arm/mach-aspeed/Kconfig
@@ -84,6 +84,12 @@ config ASPEED_ENABLE_DEBUG_UART
 
 endif
 
+config ASPEED_ROUTE_UART5_TO_UART1
+	bool "Route UART5 to UART1 pins"
+	depends on ASPEED_AST2500
+	help
+	  Route debug UART (UART5) to TXD1/RXD1 pins instead of TXD5/RXD5.
+
 config ASPEED_PALLADIUM
 	bool "Aspeed palladium for simulation"
 	default n
diff --git a/arch/arm/mach-aspeed/ast2500/platform.S b/arch/arm/mach-aspeed/ast2500/platform.S
index aef55c4a0a..fd013e4e6f 100644
--- a/arch/arm/mach-aspeed/ast2500/platform.S
+++ b/arch/arm/mach-aspeed/ast2500/platform.S
@@ -795,7 +795,7 @@ wait_ddr_reset:
     /* end delay 10ms */
 
 /* Debug - UART console message */
-#ifdef CONFIG_DRAM_UART_TO_UART1
+#ifdef CONFIG_ASPEED_ROUTE_UART5_TO_UART1
     ldr   r0, =0x1e78909c                        @ route UART5 to UART Port1, 2016.08.29
     ldr   r1, =0x10000004
     str   r1, [r0]
-- 
2.35.3