linux-kernel - Re: [PATCH v2 3/9] ARM: dts: Add SHAM data and documentation for AM33XX

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Date:	Fri, 4 Oct 2013 15:26:45 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Joel Fernandes <joelf@...com>
Cc:	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Benoit Cousson <bcousson@...libre.com>,
	Paul Walmsley <paul@...an.com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	Pawel Moll <Pawel.Moll@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	"Mark A. Greer" <mgreer@...malcreek.com>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/9] ARM: dts: Add SHAM data and documentation for
 AM33XX

On Mon, Sep 30, 2013 at 04:13:00PM +0100, Joel Fernandes wrote:
> From: "Mark A. Greer" <mgreer@...malcreek.com>
> 
> Add the generic AM33XX SHAM module's device tree data and
> enable it for the am335x-evm, am335x-evmsk, and am335x-bone
> platforms.  Also add Documentation file describing the data
> for the SHAM module.
> 
> [joelf@...com: Dropped interrupt-parrent property]
> CC: Paul Walmsley <paul@...an.com>
> Signed-off-by: Mark A. Greer <mgreer@...malcreek.com>
> ---
>  .../devicetree/bindings/crypto/omap-sham.txt       | 31 ++++++++++++++++++++++
>  arch/arm/boot/dts/am335x-bone.dts                  |  4 +++
>  arch/arm/boot/dts/am335x-evm.dts                   |  4 +++
>  arch/arm/boot/dts/am335x-evmsk.dts                 |  4 +++
>  arch/arm/boot/dts/am33xx.dtsi                      |  9 +++++++
>  5 files changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/crypto/omap-sham.txt
> 
> diff --git a/Documentation/devicetree/bindings/crypto/omap-sham.txt b/Documentation/devicetree/bindings/crypto/omap-sham.txt
> new file mode 100644
> index 0000000..b97710f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/crypto/omap-sham.txt
> @@ -0,0 +1,31 @@
> +OMAP SoC SHA crypto Module
> +
> +Required properties:
> +
> +- compatible : Should contain entries for this and backward compatible
> +  SHAM versions:
> +  - "ti,omap2-sham" for OMAP2 & OMAP3.
> +  - "ti,omap4-sham" for OMAP4 and AM33XX.
> +  Note that these two versions are incompatible.
> +- ti,hwmods: Name of the hwmod associated with the SHAM module
> +- reg : Offset and length of the register set for the module
> +- interrupt-parent : the phandle for the interrupt controller that
> +  services interrupts for this module.

I don't think this is strictly speaking necessary -- it's mostly going
to be implicit (it is in the dtsi below). As this is a standard
property, you don't need to document it here.

> +- interrupts : the interrupt number for the SHAM module.

Sorry, I missed this last time, but this should be interrupt-specifier
rather than interrupt number.

Otherwise, this looks good to me. With the fixups above:

Acked-by: Mark Rutland <mark.rutland@....com>

> +
> +Optional properties:
> +- dmas: DMA specifier for the rx dma. See the DMA client binding,
> +	Documentation/devicetree/bindings/dma/dma.txt
> +- dma-names: DMA request name. Should be "rx" if a dma is present.
> +
> +Example:
> +	/* AM335x */
> +	sham: sham@...00000 {
> +		compatible = "ti,omap4-sham";
> +		ti,hwmods = "sham";
> +		reg = <0x53100000 0x200>;
> +		interrupt-parent = <&intc>;
> +		interrupts = <109>;
> +		dmas = <&edma 36>;
> +		dma-names = "rx";
> +	};
> diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
> index 0d63348..8a9802e 100644
> --- a/arch/arm/boot/dts/am335x-bone.dts
> +++ b/arch/arm/boot/dts/am335x-bone.dts
> @@ -19,3 +19,7 @@
>  &mmc1 {
>  	vmmc-supply = <&ldo3_reg>;
>  };
> +
> +&sham {
> +	status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
> index 23b0a3e..d59e51c 100644
> --- a/arch/arm/boot/dts/am335x-evm.dts
> +++ b/arch/arm/boot/dts/am335x-evm.dts
> @@ -522,3 +522,7 @@
>  	status = "okay";
>  	vmmc-supply = <&vmmc_reg>;
>  };
> +
> +&sham {
> +	status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
> index bc93895..d45a330 100644
> --- a/arch/arm/boot/dts/am335x-evmsk.dts
> +++ b/arch/arm/boot/dts/am335x-evmsk.dts
> @@ -424,3 +424,7 @@
>  	status = "okay";
>  	vmmc-supply = <&vmmc_reg>;
>  };
> +
> +&sham {
> +	status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index 553adc6..299710b 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -710,5 +710,14 @@
>  			#size-cells = <1>;
>  			status = "disabled";
>  		};
> +
> +		sham: sham@...00000 {
> +			compatible = "ti,omap4-sham";
> +			ti,hwmods = "sham";
> +			reg = <0x53100000 0x200>;
> +			interrupts = <109>;
> +			dmas = <&edma 36>;
> +			dma-names = "rx";
> +		};
>  	};
>  };
> -- 
> 1.8.1.2
> 
> 
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