omap: introduce OMAP_LL_DEBUG_NONE DEBUG_LL config

Zoom2/Zoom3 kind of boards do not use omap uarts for console.
These use external debug board for console.

So these boards should not have "Uncompressing Kernel...."
log put on omap uarts.

By interoducing OMAP_LL_DEBUG_NONE option,
unnecessary writes to omap uarts is avoided.

In future, the DEBUG_LL interface will be enhanced
to use external debug board.

Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 64b3f52bd9b2..f348ddfb0492 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -165,7 +165,7 @@ config OMAP_DM_TIMER
 choice
         prompt "Low-level debug console UART"
         depends on ARCH_OMAP
-        default OMAP_LL_DEBUG_UART1
+        default OMAP_LL_DEBUG_NONE
 
 config OMAP_LL_DEBUG_UART1
         bool "UART1"
@@ -176,6 +176,9 @@ config OMAP_LL_DEBUG_UART2
 config OMAP_LL_DEBUG_UART3
         bool "UART3"
 
+config OMAP_LL_DEBUG_NONE
+        bool "None"
+
 endchoice
 
 config OMAP_SERIAL_WAKE
diff --git a/arch/arm/plat-omap/include/plat/uncompress.h b/arch/arm/plat-omap/include/plat/uncompress.h
index e22f57564b59..13c305d62127 100644
--- a/arch/arm/plat-omap/include/plat/uncompress.h
+++ b/arch/arm/plat-omap/include/plat/uncompress.h
@@ -44,8 +44,12 @@ static void putc(int c)
         uart = (volatile u8 *)(OMAP_UART3_BASE);
 #elif defined(CONFIG_OMAP_LL_DEBUG_UART2)
         uart = (volatile u8 *)(OMAP_UART2_BASE);
-#else
+#elif defined(CONFIG_OMAP_LL_DEBUG_UART1)
         uart = (volatile u8 *)(OMAP_UART1_BASE);
+#elif defined(CONFIG_OMAP_LL_DEBUG_NONE)
+        return;
+#else
+        return;
 #endif
 
 #ifdef CONFIG_ARCH_OMAP1