[PATCH] powerpc: serial port discovery (#2)

This moves the discovery of legacy serial ports to a separate file,
makes it common to ppc32 and ppc64, and reworks it to use the new OF
address translators to get to the ports early. This new version can also
detect some PCI serial cards using legacy chips and will probably match
those discovered port with the default console choice.

Only ppc64 gets udbg still yet, unifying udbg isn't finished yet.

It also adds some speed-probing code to udbg so that the default console
can come up at the same speed it was set to by the firmware.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index e5694335bf10..02baacf04366 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -39,6 +39,7 @@
 #include <asm/nvram.h>
 #include <asm/xmon.h>
 #include <asm/time.h>
+#include <asm/serial.h>
 
 #include "setup.h"
 
@@ -282,6 +283,13 @@ void __init setup_arch(char **cmdline_p)
 
         unflatten_device_tree();
         check_for_initrd();
+
+        if (ppc_md.init_early)
+                ppc_md.init_early();
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+        find_legacy_serial_ports();
+#endif
         finish_device_tree();
 
         smp_setup_cpu_maps();