[PATCH] msm: Add low-level debugging via MSM 8974 UART

[Ivan T. Ivanov]

Enable low-level debug print routines to direct their
output to the serial port on MSM 8974 devices.

Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
---
 arch/arm/Kconfig.debug                     |    8 ++++++++
 arch/arm/mach-msm/board-dt-8974.c          |    2 ++
 arch/arm/mach-msm/include/mach/msm_iomap.h |    4 ++++
 3 files changed, 14 insertions(+)

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 583f4a0..4a8584f 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -323,6 +323,14 @@ choice
 		  Say Y here if you want the debug print routines to direct
 		  their output to the serial port on MSM 8960 devices.
 
+	config DEBUG_MSM8974_UART
+		bool "Kernel low-level debugging messages via MSM 8974 UART"
+		depends on ARCH_MSM8974
+		select MSM_HAS_DEBUG_UART_HS
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to the serial port on MSM 8974 devices.
+
 	config DEBUG_MVEBU_UART
 		bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
 		depends on ARCH_MVEBU
diff --git a/arch/arm/mach-msm/board-dt-8974.c b/arch/arm/mach-msm/board-dt-8974.c
index 697623e..0ce016a 100644
--- a/arch/arm/mach-msm/board-dt-8974.c
+++ b/arch/arm/mach-msm/board-dt-8974.c
@@ -12,6 +12,7 @@
 
 #include <linux/of_platform.h>
 #include <asm/mach/arch.h>
+#include <asm/mach/map.h>
 
 static const char * const msm8974_dt_match[] __initconst = {
 	"qcom,msm8974-db",
@@ -20,4 +21,5 @@ static const char * const msm8974_dt_match[] __initconst = {
 
 DT_MACHINE_START(MSM8974_DT, "Qualcomm MSM (Flattened Device Tree)")
 	.dt_compat = msm8974_dt_match,
+	.map_io = debug_ll_io_init,
 MACHINE_END
diff --git a/arch/arm/mach-msm/include/mach/msm_iomap.h b/arch/arm/mach-msm/include/mach/msm_iomap.h
index c56e81f..7e08189 100644
--- a/arch/arm/mach-msm/include/mach/msm_iomap.h
+++ b/arch/arm/mach-msm/include/mach/msm_iomap.h
@@ -59,6 +59,10 @@
 #define MSM_DEBUG_UART_BASE	0xE1000000
 #define MSM_DEBUG_UART_PHYS	MSM_UART3_PHYS
 #endif
+#ifdef CONFIG_DEBUG_MSM8974_UART
+#define MSM_DEBUG_UART_BASE	0xfa71e000
+#define MSM_DEBUG_UART_PHYS	0xf991e000
+#endif
 
 /* Virtual addresses shared across all MSM targets. */
 #define MSM_CSR_BASE		IOMEM(0xE0001000)
-- 
1.7.9.5


--=-NwRlKioaeMfCTiOP8AFT--

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