powerpc/44x: Support OCM(On Chip Memory) for APM821xx SoC and Bluestone board

This patch consists of:
- Add driver for OCM component
- Export OCM Information at /sys/kernel/debug/ppc4xx_ocm/info

Signed-off-by: Vinh Nguyen Huu Tuong <vhtnguyen@apm.com>
Acked-by: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/powerpc/boot/dts/bluestone.dts b/arch/powerpc/boot/dts/bluestone.dts
index 9d4917aebe6b..7daaca324c01 100644
--- a/arch/powerpc/boot/dts/bluestone.dts
+++ b/arch/powerpc/boot/dts/bluestone.dts
@@ -107,6 +107,14 @@
                 interrupt-parent = <&UIC0>;
         };
 
+        OCM: ocm@400040000 {
+                compatible = "ibm,ocm";
+                status = "ok";
+                cell-index = <1>;
+                /* configured in U-Boot */
+                reg = <4 0x00040000 0x8000>; /* 32K */
+        };
+
         SDR0: sdr {
                 compatible = "ibm,sdr-apm821xx";
                 dcr-reg = <0x00e 0x002>;