linux-kernel - Re: [PATCH v3 3/3] iommu/mediatek: add support for MT8167

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Message-ID: <CAOwMV_xzeTXjvay32av9buJeJzSewnOGVWNdte8r-awiQr148g@mail.gmail.com>
Date:   Sun, 6 Sep 2020 17:22:16 +0200
From:   Fabien Parent <fparent@...libre.com>
To:     iommu@...ts.linux-foundation.org,
        DTML <devicetree@...r.kernel.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Cc:     joro@...tes.org, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>, yong.wu@...iatek.com
Subject: Re: [PATCH v3 3/3] iommu/mediatek: add support for MT8167

On Sun, Sep 6, 2020 at 5:19 PM Fabien Parent <fparent@...libre.com> wrote:
>
> Add support for the IOMMU on MT8167
>
> Signed-off-by: Fabien Parent <fparent@...libre.com>
> ---
>
> V3:
>         * use LEGACY_IVRP_PADDR flag instead of using a platform data member

Forgot to mention a change here: .larbid_remap has been fixed to only
contain the number of larb present on MT8167

> V2:
>         * removed if based on m4u_plat, and using instead the new
>           has_legacy_ivrp_paddr member that was introduced in patch 2.
>
> ---
>  drivers/iommu/mtk_iommu.c | 8 ++++++++
>  drivers/iommu/mtk_iommu.h | 1 +
>  2 files changed, 9 insertions(+)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index b1f85a7e9346..6079f6a23c74 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -817,6 +817,13 @@ static const struct mtk_iommu_plat_data mt6779_data = {
>         .larbid_remap  = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
>  };
>
> +static const struct mtk_iommu_plat_data mt8167_data = {
> +       .m4u_plat     = M4U_MT8167,
> +       .flags        = HAS_4GB_MODE | RESET_AXI | HAS_LEGACY_IVRP_PADDR,
> +       .inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
> +       .larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */
> +};
> +
>  static const struct mtk_iommu_plat_data mt8173_data = {
>         .m4u_plat     = M4U_MT8173,
>         .flags        = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
> @@ -835,6 +842,7 @@ static const struct mtk_iommu_plat_data mt8183_data = {
>  static const struct of_device_id mtk_iommu_of_ids[] = {
>         { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
>         { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
> +       { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
>         { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
>         { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
>         {}
> diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
> index 122925dbe547..df32b3e3408b 100644
> --- a/drivers/iommu/mtk_iommu.h
> +++ b/drivers/iommu/mtk_iommu.h
> @@ -39,6 +39,7 @@ enum mtk_iommu_plat {
>         M4U_MT2701,
>         M4U_MT2712,
>         M4U_MT6779,
> +       M4U_MT8167,
>         M4U_MT8173,
>         M4U_MT8183,
>  };
> --
> 2.28.0
>