Re: [PATCH v7 07/11] arm64: dts: qcom: sm6115: Add Crypto Engine support

[Bhupesh Sharma]

On Wed, 24 May 2023 at 23:53, Stephan Gerhold <stephan@xxxxxxxxxxx> wrote:
>
> On Sat, May 20, 2023 at 03:18:09AM +0530, Bhupesh Sharma wrote:
> > Add crypto engine (CE) and CE BAM related nodes and definitions to
> > 'sm6115.dtsi'.
> >
> > Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> > Tested-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> > Tested-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
> > Tested-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxxxxxx>
> > ---
> >  arch/arm64/boot/dts/qcom/sm6115.dtsi | 25 +++++++++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm6115.dtsi b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > index 631ca327e064..27ff42cf6066 100644
> > --- a/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > @@ -661,6 +661,31 @@ usb_hsphy: phy@1613000 {
> >                       status = "disabled";
> >               };
> >
> > +             cryptobam: dma-controller@1b04000 {
> > +                     compatible = "qcom,bam-v1.7.4", "qcom,bam-v1.7.0";
> > +                     reg = <0x0 0x01b04000 0x0 0x24000>;
> > +                     interrupts = <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>;
> > +                     #dma-cells = <1>;
> > +                     qcom,ee = <0>;
> > +                     qcom,controlled-remotely;
> > +                     num-channels = <8>;
> > +                     qcom,num-ees = <2>;
>
> I would also add the RPM_SMD_CE1_CLK clock here and then omit
> "num-channels" and "qcom,num-ees" (with [1]). It's not strictly
> necessary but will guarantee that the clock is running whenever the BAM
> is accessed (potentially avoiding crashes). And it seems to be the
> typical approach so far, see e.g. sdm845. RPMH_CE_CLK is used on both
> &cryptobam and &crypto there.
>
> [1]: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git/commit/?id=8975dd41a9dbca3b47f7b8dac5bc4dfb23011000

Sure, I have fixed this in v8 which I will post shortly.

Thanks,
Bhupesh