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Sun, 05 Jan 2020 19:24:56 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sun, 5 Jan 2020 19:22:38 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkcas08.mediatek.inc (172.21.101.126) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 6 Jan 2020 11:20:16 +0800 Received: from [172.21.77.4] (172.21.77.4) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 6 Jan 2020 11:19:00 +0800 Message-ID: <1578280829.5196.4.camel@mtksdaap41> Subject: Re: [PATCH 2/2] iommu/mediatek: add support for MT8167 From: CK Hu To: Fabien Parent Date: Mon, 6 Jan 2020 11:20:29 +0800 In-Reply-To: <20200103162632.109553-2-fparent@baylibre.com> References: <20200103162632.109553-1-fparent@baylibre.com> <20200103162632.109553-2-fparent@baylibre.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200105_192504_245003_16B2F49B X-CRM114-Status: GOOD ( 15.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, joro@8bytes.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Fabien: On Fri, 2020-01-03 at 17:26 +0100, Fabien Parent wrote: > Add support for the IOMMU on MT8167 > > Signed-off-by: Fabien Parent > --- > drivers/iommu/mtk_iommu.c | 11 ++++++++++- > drivers/iommu/mtk_iommu.h | 1 + > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c > index 6fc1f5ecf91e..5fc6178a82dc 100644 > --- a/drivers/iommu/mtk_iommu.c > +++ b/drivers/iommu/mtk_iommu.c > @@ -569,7 +569,8 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) > F_INT_PRETETCH_TRANSATION_FIFO_FAULT; > writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL); > > - if (data->plat_data->m4u_plat == M4U_MT8173) > + if (data->plat_data->m4u_plat == M4U_MT8173 || > + data->plat_data->m4u_plat == M4U_MT8167) I do not like to use m4u_plat for the variant of each SoC. If you use m4u_plat, you could drop has_4gb_mode, reset_axi, larbid_remap because you could use m4u_plat to decide the behavior of these variable but the code would be so dirty. So I think you should drop m4u_plat and use a variable to identify this behavior. Regards, CK > regval = (data->protect_base >> 1) | (data->enable_4GB << 31); > else > regval = lower_32_bits(data->protect_base) | > @@ -782,6 +783,13 @@ static const struct mtk_iommu_plat_data mt2712_data = { > .larbid_remap = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, > }; > > +static const struct mtk_iommu_plat_data mt8167_data = { > + .m4u_plat = M4U_MT8167, > + .has_4gb_mode = true, > + .reset_axi = true, > + .larbid_remap = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */ > +}; > + > static const struct mtk_iommu_plat_data mt8173_data = { > .m4u_plat = M4U_MT8173, > .has_4gb_mode = true, > @@ -798,6 +806,7 @@ 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,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 ea949a324e33..cb8fd5970cd4 100644 > --- a/drivers/iommu/mtk_iommu.h > +++ b/drivers/iommu/mtk_iommu.h > @@ -30,6 +30,7 @@ struct mtk_iommu_suspend_reg { > enum mtk_iommu_plat { > M4U_MT2701, > M4U_MT2712, > + M4U_MT8167, > M4U_MT8173, > M4U_MT8183, > }; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel