linux-kernel - Re: [PATCH v2 16/18] arm64: dts: qcom: sm6350: Add iommus property to USB1

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Message-ID: <YUDKZh5bEiXUspFV@builder.lan>
Date:   Tue, 14 Sep 2021 11:14:30 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...ainline.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, jamipkettunen@...ainline.org,
        Rob Herring <robh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Hector Martin <marcan@...can.st>,
        Vinod Koul <vkoul@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 16/18] arm64: dts: qcom: sm6350: Add iommus property
 to USB1

On Sat 28 Aug 08:18 CDT 2021, Konrad Dybcio wrote:

> This is required for us to be able to access the associated registers, which
> are (on at least some devices) gated by default.
> 

Please either merge this with the patch that introduces the SMMU (which
I presume causes this "issue") or introduce the SMMU earlier in the
series.

Regards,
Bjorn

> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
> ---
>  arch/arm64/boot/dts/qcom/sm6350.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6350.dtsi b/arch/arm64/boot/dts/qcom/sm6350.dtsi
> index a3a1f0e63ace..95e69d9f8657 100644
> --- a/arch/arm64/boot/dts/qcom/sm6350.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm6350.dtsi
> @@ -584,6 +584,7 @@ usb_1_dwc3: dwc3@...0000 {
>  				compatible = "snps,dwc3";
>  				reg = <0 0x0a600000 0 0xcd00>;
>  				interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
> +				iommus = <&apps_smmu 0x540 0x0>;
>  				snps,dis_u2_susphy_quirk;
>  				snps,dis_enblslpm_quirk;
>  				snps,has-lpm-erratum;
> -- 
> 2.33.0
>