ARM: debug: add support for Palmchip BK-310x UART

Some SoCs use a Palmchip BK-310x UART which is mostly 16550 compatible
but with a different register layout. While this UART has previously
only been supported in MIPS based chips (Alchemy, Ralink), the ARM based
SMP87xx series from Sigma Designs also uses it.

This patch allows the debug console to work with this type of UART.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index c6b6175d0203..1098e91d6d3f 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1368,6 +1368,7 @@ config DEBUG_SIRFSOC_UART
 config DEBUG_LL_INCLUDE
         string
         default "debug/sa1100.S" if DEBUG_SA1100
+        default "debug/palmchip.S" if DEBUG_UART_8250_PALMCHIP
         default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
         default "debug/at91.S" if DEBUG_AT91_UART
         default "debug/asm9260.S" if DEBUG_ASM9260_UART
@@ -1656,6 +1657,14 @@ config DEBUG_UART_8250_WORD
                 DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \
                 DEBUG_BRCMSTB_UART
 
+config DEBUG_UART_8250_PALMCHIP
+        bool "8250 UART is Palmchip BK-310x"
+        depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
+        help
+          Palmchip provides a UART implementation compatible with 16550
+          except for having a different register layout.  Say Y here if
+          the debug UART is of this type.
+
 config DEBUG_UART_8250_FLOW_CONTROL
         bool "Enable flow control for 8250 UART"
         depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250