[POWERPC] Add early debug console for CPM serial ports.

This code assumes that the ports have been previously set up, with
buffers in DPRAM.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index c38bc2237057..f4e5d22312a0 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -221,6 +221,15 @@ config PPC_EARLY_DEBUG_44x
           Select this to enable early debugging for IBM 44x chips via the
           inbuilt serial port.
 
+config PPC_EARLY_DEBUG_CPM
+        bool "Early serial debugging for Freescale CPM-based serial ports"
+        depends on SERIAL_CPM
+        select PIN_TLB if PPC_8xx
+        help
+          Select this to enable early debugging for Freescale chips
+          using a CPM-based serial port.  This assumes that the bootwrapper
+          has run, and set up the CPM in a particular way.
+
 endchoice
 
 config PPC_EARLY_DEBUG_44x_PHYSLOW
@@ -233,4 +242,16 @@ config PPC_EARLY_DEBUG_44x_PHYSHIGH
         depends PPC_EARLY_DEBUG_44x
         default "0x1"
 
+config PPC_EARLY_DEBUG_CPM_ADDR
+        hex "CPM UART early debug transmit descriptor address"
+        depends on PPC_EARLY_DEBUG_CPM
+        default "0xfa202808" if PPC_EP88XC
+        default "0xf0000808" if CPM2
+        default "0xff002808" if CPM1
+        help
+          This specifies the address of the transmit descriptor
+          used for early debug output.  Because it is needed before
+          platform probing is done, all platforms selected must
+          share the same address.
+
 endmenu