devicetree: create a separate binding description for sata_highbank

The Calxeda sata_highbank driver has been adding its descriptions to the
ahci driver. Separate them properly. This patch only affects
documentation and has no functional component.

Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/ata/sata_highbank.txt b/Documentation/devicetree/bindings/ata/sata_highbank.txt
new file mode 100644
index 000000000000..e7a6f2864f8b
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/sata_highbank.txt
@@ -0,0 +1,34 @@
+* Calxeda AHCI SATA Controller
+
+SATA nodes are defined to describe on-chip Serial ATA controllers.
+The Calxeda SATA controller mostly conforms to the AHCI interface
+with some special extensions to add functionality.
+Each SATA controller should have its own node.
+
+Required properties:
+- compatible        : compatible list, contains "calxeda,hb-ahci"
+- interrupts        : <interrupt mapping for SATA IRQ>
+- reg               : <registers mapping>
+
+Optional properties:
+- dma-coherent      : Present if dma operations are coherent
+- calxeda,port-phys : phandle-combophy and lane assignment, which maps each
+                        SATA port to a combophy and a lane within that
+                        combophy
+- calxeda,sgpio-gpio: phandle-gpio bank, bit offset, and default on or off,
+                        which indicates that the driver supports SGPIO
+                        indicator lights using the indicated GPIOs
+- calxeda,led-order : a u32 array that map port numbers to offsets within the
+                        SGPIO bitstream.
+
+Example:
+        sata@ffe08000 {
+                compatible = "calxeda,hb-ahci";
+                reg = <0xffe08000 0x1000>;
+                interrupts = <115>;
+                dma-coherent;
+                calxeda,port-phys = <&combophy5 0 &combophy0 0 &combophy0 1
+                                        &combophy0 2 &combophy0 3>;
+                calxeda,sgpio-gpio =<&gpioh 5 1 &gpioh 6 1 &gpioh 7 1>;
+                calxeda,led-order = <4 0 1 2 3>;
+        };