[POWERPC] Xserve cpu-meter driver

This is a small driver for the Xserve G5 CPU-meter blue LEDs on the
front-panel. It might work on the Xserve G4 as well though that was
not tested. It's pretty basic and could use some improvements if
somebody cares doing them. :)

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

1 files changed, 7 insertions, 1 deletions

diff --git a/include/asm-powerpc/dbdma.h b/include/asm-powerpc/dbdma.h
index 8973565f95d3..e23f07e73cb3 100644
--- a/include/asm-powerpc/dbdma.h
+++ b/include/asm-powerpc/dbdma.h
@@ -95,7 +95,13 @@ struct dbdma_cmd {
 #define DBDMA_DO_STOP(regs) do {                                \
         out_le32(&((regs)->control), (RUN|FLUSH)<<16);          \
         while(in_le32(&((regs)->status)) & (ACTIVE|FLUSH))      \
-                ;                                               \
+                ; \
+} while(0)
+
+#define DBDMA_DO_RESET(regs) do {                               \
+        out_le32(&((regs)->control), (ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN)<<16);\
+        while(in_le32(&((regs)->status)) & (RUN)) \
+                ; \
 } while(0)
 
 #endif /* _ASM_DBDMA_H_ */