crypto: marvell/cesa - add DT bindings documentation

Add DT bindings documentation for the new marvell-cesa driver.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/Documentation/devicetree/bindings/crypto/marvell-cesa.txt b/Documentation/devicetree/bindings/crypto/marvell-cesa.txt
new file mode 100644 (file)
index 0000000..c6c6a4a
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+++ b/Documentation/devicetree/bindings/crypto/marvell-cesa.txt
@@ -0,0 +1,45 @@
+Marvell Cryptographic Engines And Security Accelerator
+
+Required properties:
+- compatible: should be one of the following string
+             "marvell,orion-crypto"
+             "marvell,kirkwood-crypto"
+             "marvell,dove-crypto"
+             "marvell,armada-370-crypto"
+             "marvell,armada-xp-crypto"
+             "marvell,armada-375-crypto"
+             "marvell,armada-38x-crypto"
+- reg: base physical address of the engine and length of memory mapped
+       region. Can also contain an entry for the SRAM attached to the CESA,
+       but this representation is deprecated and marvell,crypto-srams should
+       be used instead
+- reg-names: "regs". Can contain an "sram" entry, but this representation
+            is deprecated and marvell,crypto-srams should be used instead
+- interrupts: interrupt number
+- clocks: reference to the crypto engines clocks. This property is not
+         required for orion and kirkwood platforms
+- clock-names: "cesaX" and "cesazX", X should be replaced by the crypto engine
+              id.
+              This property is not required for the orion and kirkwoord
+              platforms.
+              "cesazX" clocks are not required on armada-370 platforms
+- marvell,crypto-srams: phandle to crypto SRAM definitions
+
+Optional properties:
+- marvell,crypto-sram-size: SRAM size reserved for crypto operations, if not
+                           specified the whole SRAM is used (2KB)
+
+
+Examples:
+
+       crypto@90000 {
+               compatible = "marvell,armada-xp-crypto";
+               reg = <0x90000 0x10000>;
+               reg-names = "regs";
+               interrupts = <48>, <49>;
+               clocks = <&gateclk 23>, <&gateclk 23>;
+               clock-names = "cesa0", "cesa1";
+               marvell,crypto-srams = <&crypto_sram0>, <&crypto_sram1>;
+               marvell,crypto-sram-size = <0x600>;
+               status = "okay";
+       };