ARM: Alpine: early-debug print support

Alpine platform includes UART8250 that can be used for early prints.

Signed-off-by: Saeed Bishara <saeed@annapurnalabs.com>
Signed-off-by: Tsahee Zidenberg <tsahee@annapurnalabs.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 11 insertions, 1 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 970de7518341..77f9f8eac162 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -93,6 +93,14 @@ choice
         prompt "Kernel low-level debugging port"
         depends on DEBUG_LL
 
+        config DEBUG_ALPINE_UART0
+                bool "Kernel low-level debugging messages via Alpine UART0"
+                depends on ARCH_ALPINE
+                select DEBUG_UART_8250
+                help
+                  Say Y here if you want kernel low-level debugging support
+                  on Alpine based platforms.
+
         config DEBUG_ASM9260_UART
                 bool "Kernel low-level debugging via asm9260 UART"
                 depends on MACH_ASM9260
@@ -1417,6 +1425,7 @@ config DEBUG_UART_PHYS
         default 0xf8b00000 if DEBUG_HIX5HD2_UART
         default 0xf991e000 if DEBUG_QCOM_UARTDM
         default 0xfcb00000 if DEBUG_HI3620_UART
+        default 0xfd883000 if DEBUG_ALPINE_UART0
         default 0xfe800000 if ARCH_IOP32X
         default 0xff690000 if DEBUG_RK32_UART2
         default 0xffc02000 if DEBUG_SOCFPGA_UART
@@ -1483,6 +1492,7 @@ config DEBUG_UART_VIRT
         default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
         default 0xfd000000 if ARCH_SPEAR13XX
         default 0xfd012000 if ARCH_MV78XX0
+        default 0xfd883000 if DEBUG_ALPINE_UART0
         default 0xfde12000 if ARCH_DOVE
         default 0xfe012000 if ARCH_ORION5X
         default 0xf31004c0 if DEBUG_MESON_UARTAO
@@ -1543,7 +1553,7 @@ config DEBUG_UART_8250_WORD
         depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
         depends on DEBUG_UART_8250_SHIFT >= 2
         default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
-                ARCH_KEYSTONE || \
+                ARCH_KEYSTONE || DEBUG_ALPINE_UART0 || \
                 DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
                 DEBUG_DAVINCI_DA8XX_UART2 || \
                 DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \