msm: make debugging UART (for DEBUG_LL) configurable

Provides options to select one of the three "lowspeed" UARTs
on MSM7k SoCs for DEBUG_LL output from the zImage decompressor
and kernel.

Signed-off-by: Brian Swetland <swetland@google.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

1 files changed, 17 insertions, 7 deletions

diff --git a/arch/arm/mach-msm/include/mach/debug-macro.S b/arch/arm/mach-msm/include/mach/debug-macro.S
index 1db3c97dbc49..d48747ebcd3d 100644
--- a/arch/arm/mach-msm/include/mach/debug-macro.S
+++ b/arch/arm/mach-msm/include/mach/debug-macro.S
@@ -14,15 +14,18 @@
  *
  */
 
+
+
 #include <mach/hardware.h>
 #include <mach/msm_iomap.h>
 
+#ifdef CONFIG_MSM_DEBUG_UART
         .macro  addruart,rx
         @ see if the MMU is enabled and select appropriate base address
         mrc     p15, 0, \rx, c1, c0
         tst     \rx, #1
-        ldreq   \rx, =MSM_UART1_PHYS
-        movne   \rx, #0
+        ldreq   \rx, =MSM_DEBUG_UART_PHYS
+        ldrne   \rx, =MSM_DEBUG_UART_BASE
         .endm
 
         .macro  senduart,rd,rx
@@ -32,13 +35,20 @@
 
         .macro  waituart,rd,rx
         @ wait for TX_READY
-        teq     \rx, #0
-        bne     2f
-1:      ldr     \rd, [\rx, #0x08]
+1001:   ldr     \rd, [\rx, #0x08]
         tst     \rd, #0x04
-        beq     1b
-2:
+        beq     1001b
+        .endm
+#else
+        .macro  addruart,rx
+        .endm
+
+        .macro  senduart,rd,rx
+        .endm
+
+        .macro  waituart,rd,rx
         .endm
+#endif
 
         .macro  busyuart,rd,rx
         .endm