From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keerthy Subject: [RESEND PATCH 01/10] dt-bindings: crypto: k3: Add sa2ul bindings documentation Date: Fri, 28 Jun 2019 09:57:36 +0530 Message-ID: <20190628042745.28455-2-j-keerthy@ti.com> References: <20190628042745.28455-1-j-keerthy@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190628042745.28455-1-j-keerthy@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: herbert@gondor.apana.org.au, davem@davemloft.net, robh+dt@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, t-kristo@ti.com, j-keerthy@ti.com, linux-crypto@vger.kernel.org, nm@ti.com List-Id: devicetree@vger.kernel.org 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 --- .../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 = ; + ti,needs-epib; + ti,psd-size = <64>; + }; + + ti,psil-config1 { + linux,udma-mode = ; + ti,needs-epib; + ti,psd-size = <64>; + }; + + ti,psil-config2 { + linux,udma-mode = ; + ti,needs-epib; + ti,psd-size = <64>; + }; +}; -- 2.17.1