[MTD] [NAND] ndfc driver

The current ndfc driver only compiles under arch/ppc. This arch was
removed from the kernel. I notice the event entry for the ndfc in
Kconfig has been removed in 2.6.28.

This patch converts the ndfc to a proper OF (OpenFirmware) driver. I
can give a working example of the DTS if needed.

The patch has been in production use on the PIKA Warp Appliance and is
in use by others. The Warp basically boots from NAND, so the ndfc driver
is very important to us.

Signed-off-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-By: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/Documentation/powerpc/dts-bindings/4xx/ndfc.txt b/Documentation/powerpc/dts-bindings/4xx/ndfc.txt
new file mode 100644
index 000000000000..869f0b5f16e8
--- /dev/null
+++ b/Documentation/powerpc/dts-bindings/4xx/ndfc.txt
@@ -0,0 +1,39 @@
+AMCC NDFC (NanD Flash Controller)
+
+Required properties:
+- compatible : "ibm,ndfc".
+- reg : should specify chip select and size used for the chip (0x2000).
+
+Optional properties:
+- ccr : NDFC config and control register value (default 0).
+- bank-settings : NDFC bank configuration register value (default 0).
+
+Notes:
+- partition(s) - follows the OF MTD standard for partitions
+
+Example:
+
+ndfc@1,0 {
+        compatible = "ibm,ndfc";
+        reg = <0x00000001 0x00000000 0x00002000>;
+        ccr = <0x00001000>;
+        bank-settings = <0x80002222>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        nand {
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                partition@0 {
+                        label = "kernel";
+                        reg = <0x00000000 0x00200000>;
+                };
+                partition@200000 {
+                        label = "root";
+                        reg = <0x00200000 0x03E00000>;
+                };
+        };
+};
+
+