linux-kernel - Re: [PATCH v4 3/3] iommu/mediatek: add support for MT8167

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Message-ID: <1600070601.27773.14.camel@mhfsdcap03>
Date:   Mon, 14 Sep 2020 16:03:21 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Fabien Parent <fparent@...libre.com>
CC:     <iommu@...ts.linux-foundation.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <joro@...tes.org>,
        <robh+dt@...nel.org>, <matthias.bgg@...il.com>,
        <miles.chen@...iatek.com>
Subject: Re: [PATCH v4 3/3] iommu/mediatek: add support for MT8167

On Mon, 2020-09-07 at 12:16 +0200, Fabien Parent wrote:
> Add support for the IOMMU on MT8167
> 
> Signed-off-by: Fabien Parent <fparent@...libre.com>

Reviewed-by: Yong Wu <yong.wu@...iatek.com>

> ---
> 
> V4;
> 	* Removed HAS_4GB_MODE flag since this SoC does not seem to support it
> V3:
> 	* use LEGACY_IVRP_PADDR flag instead of using a platform data member
> 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..4ff071eb5279 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        = 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,
>  };