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

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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>
This commit is contained in:
Mans Rullgard 2016-02-05 10:49:22 +01:00 committed by Olof Johansson
parent 388f7b1d6e
commit 0c5325466d
2 changed files with 20 additions and 0 deletions
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9
arch/arm/Kconfig.debug
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@ -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

11
arch/arm/include/debug/palmchip.S Normal file
View File

@ -0,0 +1,11 @@
#include <linux/serial_reg.h>
#undef UART_TX
#undef UART_LSR
#undef UART_MSR
#define UART_TX 1
#define UART_LSR 7
#define UART_MSR 8
#include <debug/8250.S>