[RESEND PATCH 01/10] dt-bindings: crypto: k3: Add sa2ul bindings documentation
From: Keerthy <j-keerthy@ti.com>
Date: 2019-06-28 04:27:46
Also in:
linux-crypto, linux-devicetree, lkml
Subsystem:
crypto api, open firmware and flattened device tree bindings, the rest · Maintainers:
Herbert Xu, "David S. Miller", Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The series adds Crypto hardware accelerator support for SA2UL. SA2UL stands for security accelerator ultra lite. The Security Accelerator (SA2_UL) subsystem provides hardware cryptographic acceleration for the following use cases: • Encryption and authentication for secure boot • Encryption and authentication of content in applications requiring DRM (digital rights management) and content/asset protection The device includes one instantiation of SA2_UL named SA2_UL0 SA2UL needs on tx channel and a pair of rx dma channels. Signed-off-by: Keerthy <j-keerthy@ti.com> --- .../devicetree/bindings/crypto/sa2ul.txt | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/crypto/sa2ul.txt
diff --git a/Documentation/devicetree/bindings/crypto/sa2ul.txt b/Documentation/devicetree/bindings/crypto/sa2ul.txt
new file mode 100644
index 000000000000..81cc039673b4
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/sa2ul.txt@@ -0,0 +1,47 @@ +K3 SoC SA2UL crypto module + +Required properties: + +- compatible : Should be: + - "ti,sa2ul-crypto" +- reg : Offset and length of the register set for the module + +- dmas: DMA specifiers for tx and rx dma. sa2ul needs one tx channel + and 2 rx channels. First rx channel for < 256 bytes and + the other one for >=256 bytes. See the DMA client binding, + Documentation/devicetree/bindings/dma/dma.txt +- dma-names: DMA request names has to have one tx and 2 rx names + corresponding to dmas abive. +- ti,psil-config* - UDMA PSIL native Peripheral using packet mode. + SA2UL must have EPIB(Extended protocal information block) + and PSDATA(protocol specific data) properties. + +Example AM654 SA2UL: +crypto: crypto@4E00000 { + compatible = "ti,sa2ul-crypto"; + reg = <0x0 0x4E00000 0x0 0x1200>; + ti,psil-base = <0x4000>; + + dmas = <&main_udmap &crypto 0 UDMA_DIR_TX>, + <&main_udmap &crypto 0 UDMA_DIR_RX>, + <&main_udmap &crypto 1 UDMA_DIR_RX>; + dma-names = "tx", "rx1", "rx2"; + + ti,psil-config0 { + linux,udma-mode = <UDMA_PKT_MODE>; + ti,needs-epib; + ti,psd-size = <64>; + }; + + ti,psil-config1 { + linux,udma-mode = <UDMA_PKT_MODE>; + ti,needs-epib; + ti,psd-size = <64>; + }; + + ti,psil-config2 { + linux,udma-mode = <UDMA_PKT_MODE>; + ti,needs-epib; + ti,psd-size = <64>; + }; +};
--
2.17.1
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