crypto: rockchip - add DT bindings documentation

Add DT bindings documentation for the rk3288 crypto drivers.

Signed-off-by: Zain Wang <zain.wang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/Documentation/devicetree/bindings/crypto/rockchip-crypto.txt b/Documentation/devicetree/bindings/crypto/rockchip-crypto.txt
new file mode 100644 (file)
index 0000000..096df34
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/rockchip-crypto.txt
@@ -0,0 +1,29 @@
+Rockchip Electronics And Security Accelerator
+
+Required properties:
+- compatible: Should be "rockchip,rk3288-crypto"
+- reg: Base physical address of the engine and length of memory mapped
+       region
+- interrupts: Interrupt number
+- clocks: Reference to the clocks about crypto
+- clock-names: "aclk" used to clock data
+              "hclk" used to clock data
+              "sclk" used to clock crypto accelerator
+              "apb_pclk" used to clock dma
+- resets: Must contain an entry for each entry in reset-names.
+         See ../reset/reset.txt for details.
+- reset-names: Must include the name "crypto-rst".
+
+Examples:
+
+       crypto: cypto-controller@ff8a0000 {
+               compatible = "rockchip,rk3288-crypto";
+               reg = <0xff8a0000 0x4000>;
+               interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&cru ACLK_CRYPTO>, <&cru HCLK_CRYPTO>,
+                        <&cru SCLK_CRYPTO>, <&cru ACLK_DMAC1>;
+               clock-names = "aclk", "hclk", "sclk", "apb_pclk";
+               resets = <&cru SRST_CRYPTO>;
+               reset-names = "crypto-rst";
+               status = "okay";
+       };