linux-kernel - Re: [PATCH v3 2/2] drivers: arm-smmu-impl: Add QDU1000 and QRU1000 iommu implementation

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Message-ID: <20221114144220.GA31043@willie-the-truck>
Date:   Mon, 14 Nov 2022 14:42:21 +0000
From:   Will Deacon <will@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Melody Olvera <quic_molvera@...cinc.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] drivers: arm-smmu-impl: Add QDU1000 and QRU1000
 iommu implementation

On Mon, Nov 14, 2022 at 03:28:15PM +0100, Krzysztof Kozlowski wrote:
> On 26/10/2022 21:05, Melody Olvera wrote:
> > Add compatible for Qualcomm QDU1000 and QRU1000 SoCs to add iommu
> > support for them.
> > 
> > Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
> > ---
> >  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > index b2708de25ea3..0580a381a04b 100644
> > --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > @@ -426,6 +426,7 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
> >  static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
> >  	{ .compatible = "qcom,msm8998-smmu-v2" },
> >  	{ .compatible = "qcom,qcm2290-smmu-500" },
> > +	{ .compatible = "qcom,qdu1000-smmu-500" },
> 
> The patch was applied but it contradicts work here:
> https://lore.kernel.org/all/20221102184420.534094-12-dmitry.baryshkov@linaro.org/
> which explicitly asks not to add such compatibles...

Sure, but we've been adding new compatibles for years so I don't mind
picking up the last few now before we stop accepting new ones.

I already asked Dmitry to respin his series as there are some open comments
from others anyway.

Will