On Tue, Aug 6, 2013 at 1:33 AM, Lokesh Vutla <lokeshvutla@xxxxxx> wrote:
> Add the generic AM33xx RNG 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 RNG module.
>
> Signed-off-by: Lokesh Vutla <lokeshvutla@xxxxxx>
> ---
> .../devicetree/bindings/hwrng/omap_rng.txt | 22 ++++++++++++++++++++
> 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 | 8 +++++++
> 5 files changed, 42 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwrng/omap_rng.txt
>
> diff --git a/Documentation/devicetree/bindings/hwrng/omap_rng.txt b/Documentation/devicetree/bindings/hwrng/omap_rng.txt
> new file mode 100644
> index 0000000..6a62acd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwrng/omap_rng.txt
> @@ -0,0 +1,22 @@
> +OMAP SoC HWRNG Module
> +
> +Required properties:
> +
> +- compatible : Should contain entries for this and backward compatible
> + RNG versions:
> + - "ti,omap2-rng" for OMAP2.
> + - "ti,omap4-rng" for OMAP4, OMAP5 and AM33XX.
> + Note that these two versions are incompatible.
> +- ti,hwmods: Name of the hwmod associated with the RNG module
> +- reg : Offset and length of the register set for the module
> +- interrupts : the interrupt number for the RNG module.
> + Only used for "ti,omap4-rng".
> +
> +Example:
> +/* AM335x */
> +rng: rng@48310000 {
> + compatible = "ti,omap4-rng";
> + ti,hwmods = "rng";
> + reg = <0x48310000 0x2000>;
> + interrupts = <111>;
> +};
> diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
> index 444b4ed..46a3887 100644
> --- a/arch/arm/boot/dts/am335x-bone.dts
> +++ b/arch/arm/boot/dts/am335x-bone.dts
> @@ -234,3 +234,7 @@
> pinctrl-0 = <&davinci_mdio_default>;
> pinctrl-1 = <&davinci_mdio_sleep>;
> };
> +
> +&rng {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
> index 3aee1a4..ebfbebe1 100644
> --- a/arch/arm/boot/dts/am335x-evm.dts
> +++ b/arch/arm/boot/dts/am335x-evm.dts
> @@ -488,3 +488,7 @@
> ti,adc-channels = <4 5 6 7>;
> };
> };
> +
> +&rng {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
> index 0c8ad17..6610a05 100644
> --- a/arch/arm/boot/dts/am335x-evmsk.dts
> +++ b/arch/arm/boot/dts/am335x-evmsk.dts
> @@ -402,3 +402,7 @@
> phy_id = <&davinci_mdio>, <1>;
> phy-mode = "rgmii-txid";
> };
> +
> +&rng {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index 38b446b..b1e6205 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -530,5 +530,13 @@
> #size-cells = <1>;
> status = "disabled";
> };
> +
> + rng: rng@48310000 {
> + compatible = "ti,omap4-rng";
> + ti,hwmods = "rng";
> + reg = <0x48310000 0x2000>;
> + interrupts = <111>;
> + status = "disabled";
Is there any point in making this default to "disabled"? Are there any
am335x platforms where the trng doesn't function?
> + };
> };
> };
> --
> 1.7.9.5
>
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