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>

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 970de7518341d2382ee86a8c9a0cefde2bca2739..77f9f8eac1621b88db494867238ff5d411b47cd3 100644 (file)
--- 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 || \