linux-kernel - Re: [PATCH v3] arm64: dts: qcom: qdu1000: Add secure qfprom node

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Date: Wed, 19 Jun 2024 15:42:29 +0530
From: Mukesh Ojha <quic_mojha@...cinc.com>
To: Komal Bajaj <quic_kbajaj@...cinc.com>
CC: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Rob Herring <robh@...nel.org>,
        "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] arm64: dts: qcom: qdu1000: Add secure qfprom node

On Wed, Jun 19, 2024 at 12:08:13AM +0530, Mukesh Ojha wrote:
> On Tue, Jun 18, 2024 at 02:57:11PM +0530, Komal Bajaj wrote:
> > Add secure qfprom node and also add properties for multi channel
> > DDR. This is required for LLCC driver to pick the correct LLCC
> > configuration.
> > 
> > Fixes: 6209038f131f ("arm64: dts: qcom: qdu1000: Add LLCC/system-cache-controller")
> > Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
> > ---
> > Changes in v3:
> > * Addressed comment by Konrad
> > * Added Fixes tag in commit message as suggested by Dmitry
> > * Link to v2: https://lore.kernel.org/linux-arm-msm/20240612063424.2494-1-quic_kbajaj@quicinc.com/
> > 
> > Changes in v2:
> > * Minor correction in commit message
> > * Link to v1: https://lore.kernel.org/linux-arm-msm/20240607113445.2909-1-quic_kbajaj@quicinc.com/
> > ---
> >  arch/arm64/boot/dts/qcom/qdu1000.dtsi | 15 +++++++++++++++
> >  1 file changed, 15 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/qdu1000.dtsi b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> > index 7a77f7a55498..27f9fc87079c 100644
> > --- a/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
> > @@ -1584,6 +1584,21 @@ system-cache-controller@...00000 {
> >  			reg-names = "llcc0_base",
> >  				    "llcc_broadcast_base";
> >  			interrupts = <GIC_SPI 266 IRQ_TYPE_LEVEL_HIGH>;
> > +
> > +			nvmem-cells = <&multi_chan_ddr>;
> > +			nvmem-cell-names = "multi-chan-ddr";
> > +		};
> > +
> > +		sec_qfprom: efuse@...c8000 {
> > +			compatible = "qcom,qdu1000-sec-qfprom", "qcom,sec-qfprom";
> > +			reg = <0 0x221c8000 0 0x1000>;
> > +			#address-cells = <1>;
> > +			#size-cells = <1>;
> > +
> > +			multi_chan_ddr: multi-chan-ddr@12b {
> > +				reg = <0x12b 0x1>;
> > +				bits = <0 2>;
> > +			};
> 
> LGTM, without this change, LLCC driver for QDU1000 will result in probe failure.
> 
> Reviewed-by: Mukesh Ojha <quic_mojha@...cinc.com>

Just noticed, sec_qfprom driver config CONFIG_NVMEM_QCOM_SEC_QFPROM, still
need to be enabled.

-Mukesh