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Message-ID: <0e430d1e-ee25-1b3d-4a2c-8641db255adb@collabora.com>
Date: Mon, 31 Jan 2022 10:25:13 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Yong Wu <yong.wu@...iatek.com>
Cc: Robin Murphy <robin.murphy@....com>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Tomasz Figa <tfiga@...omium.org>,
linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
iommu@...ts.linux-foundation.org,
Hsin-Yi Wang <hsinyi@...omium.org>, youlin.pei@...iatek.com,
anan.sun@...iatek.com, xueqi.zhang@...iatek.com,
yen-chang.chen@...iatek.com, mingyuan.ma@...iatek.com,
yf.wang@...iatek.com, libo.kang@...iatek.com,
chengci.xu@...iatek.com, Joerg Roedel <joro@...tes.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Will Deacon <will@...nel.org>
Subject: Re: [PATCH 2/2] iommu/mediatek: Add mt8186 iommu support
Il 28/01/22 10:39, Yong Wu ha scritto:
> On Thu, 2022-01-27 at 12:28 +0100, AngeloGioacchino Del Regno wrote:
>> Il 25/01/22 10:32, Yong Wu ha scritto:
>>> Add mt8186 iommu supports.
>>>
>>> Signed-off-by: Anan Sun <anan.sun@...iatek.com>
>>> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
>>> ---
>>> drivers/iommu/mtk_iommu.c | 17 +++++++++++++++++
>>> 1 file changed, 17 insertions(+)
>
> [snip]
>
>>> static const struct mtk_iommu_plat_data mt8192_data = {
>>> .m4u_plat = M4U_MT8192,
>>> .flags = HAS_BCLK | HAS_SUB_COMM_2BITS |
>>> OUT_ORDER_WR_EN |
>>> @@ -1470,6 +1486,7 @@ static const struct of_device_id
>>> mtk_iommu_of_ids[] = {
>>> { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
>>> { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
>>> { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
>>> + { .compatible = "mediatek,mt8186-iommu-mm", .data =
>>> &mt8186_data_mm},
>>
>> Hello!
>>
>> Is there any particular reason why this compatible is not
>> "mediatek,mt8186-m4u"?
>
> There is no special reason. In the previous SoC, We only support MM
> IOMMU, it was called by "m4u". In the lastest SoC, We have the other
> types IOMMU, like for INFRA masters and APU, thus they are called "mm
> iommu", "infra iommu" and "apu iommu". Of course, "m4u" means "mm
> iommu".
>
I suggest, at this point, to change it to "mediatek,mt8186-m4u" for naming
consistency with the other bindings and to avoid any kind of confusion.
Thank you!
>>
>> Thanks,
>> Angelo
>>
>>> { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
>>> { .compatible = "mediatek,mt8195-iommu-infra", .data =
>>> &mt8195_data_infra},
>>> { .compatible = "mediatek,mt8195-iommu-vdo", .data =
>>> &mt8195_data_vdo},
>>
>> _______________________________________________
>> Linux-mediatek mailing list
>> Linux-mediatek@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-mediatek
>
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