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SubjectRe: [PATCH 2/2] arm64: dts: qcom: ipq8074: add QFPROM node
On Sun, 22 Jan 2023 at 18:05, Kathiravan Thirumoorthy
<quic_kathirav@quicinc.com> wrote:
>
>
> On 1/22/2023 10:29 PM, Robert Marko wrote:
> > On Sun, 22 Jan 2023 at 17:57, Kathiravan Thirumoorthy
> > <quic_kathirav@quicinc.com> wrote:
> >>
> >> On 1/21/2023 4:53 PM, Robert Marko wrote:
> >>> IPQ8074 has efuses like other Qualcomm SoC-s that are required for
> >>> determining various HW quirks which will be required later for CPR etc,
> >>> so lets add the QFPROM node for start.
> >>>
> >>> Individidual fuses will be added as they are required.
> >>>
> >>> Signed-off-by: Robert Marko <robimarko@gmail.com>
> >>> ---
> >>> arch/arm64/boot/dts/qcom/ipq8074.dtsi | 7 +++++++
> >>> 1 file changed, 7 insertions(+)
> >>>
> >>> diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> >>> index 8eba586065a3..f29491f647fe 100644
> >>> --- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> >>> +++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> >>> @@ -301,6 +301,13 @@ mdio: mdio@90000 {
> >>> status = "disabled";
> >>> };
> >>>
> >>> + qfprom: efuse@a4000 {
> >>> + compatible = "qcom,ipq8074-qfprom", "qcom,qfprom";
> >>> + reg = <0x000a4000 0x1000>;
> >>
> >> From the HW document, I see the overall size of this region is 0x2000,
> >> any reason to stick with 0x1000?
> > Like always, I dont have access to docs and 0x1000 is all I could find
> > downstream
> > being used.
> >
> > Any chance you can share the regions inside of QFPROM, it would be great to use
> > the ECC corrected one if available.
>
> Sorry, What do you refer by "ECC corrected" here?

Isnt there a corrected region in the QFPROM meant for reading?
As far as I understand it's protected by FEC.

Regards,
Robert
>
> Thanks, Kathiravan T.
>
>
> >
> > Regards,
> > Robert
> >> Thanks, Kathiravan T.
> >>
> >>
> >>> + #address-cells = <1>;
> >>> + #size-cells = <1>;
> >>> + };
> >>> +
> >>> prng: rng@e3000 {
> >>> compatible = "qcom,prng-ee";
> >>> reg = <0x000e3000 0x1000>;

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