ARM: DT: qcom: Add Qualcomm crypto driver binding document

Here is Qualcomm crypto driver device tree binding documentation
to used as a reference example.

Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/Documentation/devicetree/bindings/crypto/qcom-qce.txt b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
new file mode 100644 (file)
index 0000000..fdd53b1
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
@@ -0,0 +1,25 @@
+Qualcomm crypto engine driver
+
+Required properties:
+
+- compatible  : should be "qcom,crypto-v5.1"
+- reg         : specifies base physical address and size of the registers map
+- clocks      : phandle to clock-controller plus clock-specifier pair
+- clock-names : "iface" clocks register interface
+                "bus" clocks data transfer interface
+                "core" clocks rest of the crypto block
+- dmas        : DMA specifiers for tx and rx dma channels. For more see
+                Documentation/devicetree/bindings/dma/dma.txt
+- dma-names   : DMA request names should be "rx" and "tx"
+
+Example:
+       crypto@fd45a000 {
+               compatible = "qcom,crypto-v5.1";
+               reg = <0xfd45a000 0x6000>;
+               clocks = <&gcc GCC_CE2_AHB_CLK>,
+                        <&gcc GCC_CE2_AXI_CLK>,
+                        <&gcc GCC_CE2_CLK>;
+               clock-names = "iface", "bus", "core";
+               dmas = <&cryptobam 2>, <&cryptobam 3>;
+               dma-names = "rx", "tx";
+       };