On Mon, Sep 30, 2013 at 04:13:01PM +0100, Joel Fernandes wrote:
> From: "Mark A. Greer" <mgreer@xxxxxxxxxxxxxxx>
>
> Add the generic AM33XX AES 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 AES module.
>
> [joelf@xxxxxx: Dropped interrupt-parent propert]
>
> CC: Paul Walmsley <paul@xxxxxxxxx>
> Signed-off-by: Mark A. Greer <mgreer@xxxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/crypto/omap-aes.txt | 34 ++++++++++++++++++++++
> 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 | 10 +++++++
> 5 files changed, 56 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/crypto/omap-aes.txt
>
> diff --git a/Documentation/devicetree/bindings/crypto/omap-aes.txt b/Documentation/devicetree/bindings/crypto/omap-aes.txt
> new file mode 100644
> index 0000000..4bb1e27
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/crypto/omap-aes.txt
> @@ -0,0 +1,34 @@
> +OMAP SoC AES crypto Module
> +
> +Required properties:
> +
> +- compatible : Should contain entries for this and backward compatible
> + AES versions:
> + - "ti,omap2-aes" for OMAP2.
> + - "ti,omap3-aes" for OMAP3.
> + - "ti,omap4-aes" for OMAP4 and AM33XX.
> + Note that the OMAP2 and 3 versions are compatible (OMAP3 supports
> + more algorithms) but they are incompatible with OMAP4.
> +- ti,hwmods: Name of the hwmod associated with the AES odule
> +- 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.
> +- interrupts : the interrupt number for the AES odule.
Similar comments to the SHAM module here:
* s/interrupt number/interrupt-specifier/
* Drop interrupt-parent.
* s/AES odule/AES module/
> +
> +Optional properties:
> +- dmas: DMA specifier for tx and rx dma. See the DMA client binding,
> + Documentation/devicetree/bindings/dma/dma.txt
s/DMA specifier/DMA specifiers/
> +- dma-names: DMA request names. Should be '"tx", "rx"' if dma is present.
Nit: I'd prefer 'Should include "tx" and "rx" if present' -- I hope the
driver's requesting these by name rather than relying on a specific
ordering (it makes future expansion and optional components far easier
to handle sanely).
> +
> +Example:
> + /* AM335x */
> + aes: aes@53500000 {
> + compatible = "ti,omap4-aes";
> + ti,hwmods = "aes";
> + reg = <0x53500000 0xa0>;
> + interrupt-parent = <&intc>;
> + interrupts = <102>;
> + dmas = <&edma 6
> + &edma 5>;
> + dma-names = "tx", "rx";
> + };
Minor nit, but for consistency could you bracket the DMAs individually:
dmas = <&edma 6>,
<&edma 5>;
> diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
> index 8a9802e..94ee427 100644
> --- a/arch/arm/boot/dts/am335x-bone.dts
> +++ b/arch/arm/boot/dts/am335x-bone.dts
> @@ -23,3 +23,7 @@
> &sham {
> status = "okay";
> };
> +
> +&aes {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
> index d59e51c..86463fa 100644
> --- a/arch/arm/boot/dts/am335x-evm.dts
> +++ b/arch/arm/boot/dts/am335x-evm.dts
> @@ -526,3 +526,7 @@
> &sham {
> status = "okay";
> };
> +
> +&aes {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
> index d45a330..f577e65 100644
> --- a/arch/arm/boot/dts/am335x-evmsk.dts
> +++ b/arch/arm/boot/dts/am335x-evmsk.dts
> @@ -428,3 +428,7 @@
> &sham {
> status = "okay";
> };
> +
> +&aes {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index 299710b..0daa1b2 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -719,5 +719,15 @@
> dmas = <&edma 36>;
> dma-names = "rx";
> };
> +
> + aes: aes@53500000 {
> + compatible = "ti,omap4-aes";
> + ti,hwmods = "aes";
> + reg = <0x53500000 0xa0>;
> + interrupts = <102>;
> + dmas = <&edma 6
> + &edma 5>;
Bracketing here too, please.
Cheers,
Mark.
> + dma-names = "tx", "rx";
> + };
> };
> };
> --
> 1.8.1.2
>
>
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