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authorMans Rullgard <mans@mansr.com>2016-02-05 10:49:22 +0100
committerOlof Johansson <olof@lixom.net>2016-02-08 13:52:34 -0800
commit0c5325466d5d4816c9bd13c56746aa26ed66231d (patch)
tree15236f341438e6d89d0253d32738e57628a39e9a /arch/arm
parent388f7b1d6e8ca06762e2454d28d6c3c55ad0fe95 (diff)
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig.debug9
-rw-r--r--arch/arm/include/debug/palmchip.S11
2 files changed, 20 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
diff --git a/arch/arm/include/debug/palmchip.S b/arch/arm/include/debug/palmchip.S
new file mode 100644
index 000000000000..6824b2d1c38e
--- /dev/null
+++ b/arch/arm/include/debug/palmchip.S
@@ -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>