ARM: 6079/1: ux500: allow choice of the DEBUG_LL UART

Allow the UART used for DEBUG_LL to be selected.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 17 insertions, 2 deletions

diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 699588f7da87..8ad5ee8107ae 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -27,4 +27,11 @@ config MACH_U8500_MOP
           on early drop silicon version of 8500.
 endmenu
 
+config UX500_DEBUG_UART
+        int "Ux500 UART to use for low-level debug"
+        default 2
+        help
+          Choose the UART on which kernel low-level debug messages should be
+          output.
+
 endif
diff --git a/arch/arm/mach-ux500/include/mach/debug-macro.S b/arch/arm/mach-ux500/include/mach/debug-macro.S
index 09cbfda8aee5..c5203b7ea552 100644
--- a/arch/arm/mach-ux500/include/mach/debug-macro.S
+++ b/arch/arm/mach-ux500/include/mach/debug-macro.S
@@ -10,11 +10,19 @@
  */
 #include <mach/hardware.h>
 
+#if CONFIG_UX500_DEBUG_UART > 2
+#error Invalid Ux500 debug UART
+#endif
+
+#define __UX500_UART(n) UX500_UART##n##_BASE
+#define UX500_UART(n)   __UX500_UART(n)
+#define UART_BASE       UX500_UART(CONFIG_UX500_DEBUG_UART)
+
         .macro  addruart, rx, tmp
         mrc     p15, 0, \rx, c1, c0
         tst     \rx, #1                                 @ MMU enabled?
-        ldreq   \rx, =U8500_UART2_BASE                  @ no, physical address
-        ldrne   \rx, =IO_ADDRESS(U8500_UART2_BASE)      @ yes, virtual address
+        ldreq   \rx, =UART_BASE                         @ no, physical address
+        ldrne   \rx, =IO_ADDRESS(UART_BASE)             @ yes, virtual address
         .endm
 
 #include <asm/hardware/debug-pl01x.S>