mtd: sh_flctl: Add device tree support

The flctl can now be probed via device tree setup in addition to the
existing platform data way.

SoC specific setup data is set in the .data member of the OF match, so
kept within the driver itself, while board/user specific setup - like
partitioning - is taken from the device tree.

Actual configuration is added for the SoC sh7372.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mtd/flctl-nand.txt b/Documentation/devicetree/bindings/mtd/flctl-nand.txt
new file mode 100644
index 000000000000..427f46dc60ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/flctl-nand.txt
@@ -0,0 +1,49 @@
+FLCTL NAND controller
+
+Required properties:
+- compatible : "renesas,shmobile-flctl-sh7372"
+- reg : Address range of the FLCTL
+- interrupts : flste IRQ number
+- nand-bus-width : bus width to NAND chip
+
+Optional properties:
+- dmas: DMA specifier(s)
+- dma-names: name for each DMA specifier. Valid names are
+             "data_tx", "data_rx", "ecc_tx", "ecc_rx"
+
+The DMA fields are not used yet in the driver but are listed here for
+completing the bindings.
+
+The device tree may optionally contain sub-nodes describing partitions of the
+address space. See partition.txt for more detail.
+
+Example:
+
+        flctl@e6a30000 {
+                #address-cells = <1>;
+                #size-cells = <1>;
+                compatible = "renesas,shmobile-flctl-sh7372";
+                reg = <0xe6a30000 0x100>;
+                interrupts = <0x0d80>;
+
+                nand-bus-width = <16>;
+
+                dmas = <&dmac 1 /* data_tx */
+                        &dmac 2;> /* data_rx */
+                dma-names = "data_tx", "data_rx";
+
+                system@0 {
+                        label = "system";
+                        reg = <0x0 0x8000000>;
+                };
+
+                userdata@8000000 {
+                        label = "userdata";
+                        reg = <0x8000000 0x10000000>;
+                };
+
+                cache@18000000 {
+                        label = "cache";
+                        reg = <0x18000000 0x8000000>;
+                };
+        };