This adds device tree bindings for the Cortina Systems Gemini
PATA to SATA bridge.

Cc: devicetree at vger.kernel.org
Cc: John Feng-Hsin Chiang <redacted>
Cc: Greentime Hu <redacted>
Signed-off-by: Linus Walleij <redacted>
---
 .../bindings/ata/cortina,gemini-sata-bridge.txt    | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt

diff --git a/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt b/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt
new file mode 100644
index 000000000000..9fe92818b2fb
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt

@@ -0,0 +1,55 @@
+* Cortina Systems Gemini SATA Bridge
+
+The Gemini SATA bridge in a SoC-internal PATA to SATA bridge that
+takes two Faraday Technology FTIDE010 PATA controllers and bridges
+them in different configurations to two SATA ports.
+
+Required properties:
+- compatible: should be
+  "cortina,gemini-sata-bridge"
+- reg: registers and size for the block
+- resets: phandles to the reset lines for both SATA bridges
+- reset-names: must be "sata0", "sata1"
+- clocks: phandles to the compulsory peripheral clocks
+- clock-names: must be "SATA0_PCLK", "SATA1_PCLK"
+- syscon: a phandle to the global Gemini system controller
+- cortina,gemini-ata-muxmode: tell the desired multiplexing mode for
+  the ATA controller and SATA bridges. Values 0..3:
+  Mode 0: ata0 master <-> sata0
+          ata1 master <-> sata1
+          ata0 slave interface brought out on IDE pads
+  Mode 1: ata0 master <-> sata0
+          ata1 master <-> sata1
+          ata1 slave interface brought out on IDE pads
+  Mode 2: ata1 master <-> sata1
+          ata1 slave  <-> sata0
+          ata0 master and slave interfaces brought out
+               on IDE pads
+  Mode 3: ata0 master <-> sata0
+          ata1 slave  <-> sata1