A patch to enable EarlyPrintk in Linux Kernel

Below is the patch to enable earlyprintk in TI platforms.

Note that this is only for a present system that I am working

right now and may not apply/work straightaway in all platfrom.

Hence you may have to put effort to port this patch in your 

system.

diff --git a/arch/arm/configs/xyz-ed0-dbg_defconfig b/arch/arm/configs/xyz-ed0-dbg_defconfig

index 688316b..f2fed80 100644

--- a/arch/arm/configs/xyz-ed0-dbg_defconfig

+++ b/arch/arm/configs/xyz-ed0-dbg_defconfig

@@ -181,10 +181,17 @@ CONFIG_HAVE_ARCH_KGDB=y

# CONFIG_STRICT_DEVMEM is not set

CONFIG_ARM_UNWIND=y

# CONFIG_DEBUG_USER is not set

-# CONFIG_DEBUG_LL is not set

-CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S"

+CONFIG_DEBUG_LL=y

+CONFIG_DEBUG_LL_INCLUDE="debug/8250.S"

# CONFIG_DEBUG_UART_8250 is not set

+CONFIG_DEBUG_LL_UART_8250=y

+CONFIG_DEBUG_UART_PHYS=0x48020000

+CONFIG_DEBUG_UART_VIRT=0xFA020000

+CONFIG_DEBUG_UART_8250_SHIFT=2

CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h"

+CONFIG_DEBUG_UNCOMPRESS=y

+CONFIG_EARLY_PRINTK=y

+CONFIG_EARLY_PRINTK_DIRECT=y

# CONFIG_PID_IN_CONTEXTIDR is not set

# CONFIG_DEBUG_SET_MODULE_RONX is not set

# CONFIG_CORESIGHT is not set

diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c

index cc48abb..34331e9 100755

--- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c

+++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c

@@ -2950,7 +2950,8 @@ static struct omap_hwmod dra7xx_uart3_hwmod = {

    .class          = &dra7xx_uart_hwmod_class,

    .clkdm_name     = "l4per_clkdm",

    .main_clk  = "uart3_gfclk_mux",

-    .flags          = HWMOD_SWSUP_SIDLE_ACT | DEBUG_OMAP4UART3_FLAGS,

+    .flags          = HWMOD_SWSUP_SIDLE_ACT | DEBUG_OMAP4UART3_FLAGS |

+                    DEBUG_OMAPUART_FLAGS,

    .prcm = {

          .omap4 = {

               .clkctrl_offs = DRA7XX_CM_L4PER_UART3_CLKCTRL_OFFSET,