2022-12-14 17:42:11

by Brian Masney

Subject: [PATCH v2 7/7] arm64: dts: qcom: sc8280xp: add rng device tree node

Add the necessary device tree node for qcom,prng-ee so we can use the
hardware random number generator. This functionality was tested on a
SA8540p automotive development board using kcapi-rng from libkcapi.

Signed-off-by: Brian Masney <[email protected]>
---
This is a new patch that's introduced in v2.

arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 4591d411f5fb..67765975361b 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -2811,6 +2811,13 @@ tlmm: pinctrl@f100000 {
gpio-ranges = <&tlmm 0 0 230>;
};

+ rng: rng@10d3000 {
+ compatible = "qcom,prng-ee";
+ reg = <0 0x010d3000 0 0x1000>;
+ clocks = <&rpmhcc RPMH_HWKM_CLK>;
+ clock-names = "core";
+ };
+
apps_smmu: iommu@15000000 {
compatible = "qcom,sc8280xp-smmu-500", "arm,mmu-500";
reg = <0 0x15000000 0 0x100000>;
--
2.38.1

2022-12-15 13:13:26

by Konrad Dybcio

Subject: Re: [PATCH v2 7/7] arm64: dts: qcom: sc8280xp: add rng device tree node

On 14.12.2022 18:11, Brian Masney wrote:
> Add the necessary device tree node for qcom,prng-ee so we can use the
> hardware random number generator. This functionality was tested on a
> SA8540p automotive development board using kcapi-rng from libkcapi.
>
> Signed-off-by: Brian Masney <[email protected]>
> ---
Nodes with MMIO addresses should be sorted address-wise, so
this one should come between qup1 and pcie4.

Konrad
> This is a new patch that's introduced in v2.
>
> arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index 4591d411f5fb..67765975361b 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -2811,6 +2811,13 @@ tlmm: pinctrl@f100000 {
> gpio-ranges = <&tlmm 0 0 230>;
> };
>
> + rng: rng@10d3000 {
> + compatible = "qcom,prng-ee";
> + reg = <0 0x010d3000 0 0x1000>;
> + clocks = <&rpmhcc RPMH_HWKM_CLK>;
> + clock-names = "core";
> + };
> +
> apps_smmu: iommu@15000000 {
> compatible = "qcom,sc8280xp-smmu-500", "arm,mmu-500";
> reg = <0 0x15000000 0 0x100000>;