linux-kernel - Aw: Re: [PATCH v2 2/2] mmc: mtk-sd: add support for mt7988

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Message-ID: <trinity-2ac8c3fe-ad19-424b-ab4f-da84c42c4ae1-1728290266613@3c-app-gmx-bap03>
Date: Mon, 7 Oct 2024 10:37:46 +0200
From: Frank Wunderlich <frank-w@...lic-files.de>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Frank Wunderlich <linux@...web.de>, Chaotian Jing
 <chaotian.jing@...iatek.com>, Ulf Hansson <ulf.hansson@...aro.org>, Rob
 Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor
 Dooley <conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
 Wenbin Mei <wenbin.mei@...iatek.com>, linux-mmc@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 daniel@...rotopia.org, john@...ozen.org, eladwf@...il.com,
 ansuelsmth@...il.com
Subject: Aw: Re: [PATCH v2 2/2] mmc: mtk-sd: add support for mt7988

Hi

> Gesendet: Montag, 07. Oktober 2024 um 09:58 Uhr
> Von: "AngeloGioacchino Del Regno" <angelogioacchino.delregno@...labora.com>
> Betreff: Re: [PATCH v2 2/2] mmc: mtk-sd: add support for mt7988
>
> Il 06/10/24 17:34, Frank Wunderlich ha scritto:
> > From: Frank Wunderlich <frank-w@...lic-files.de>
> >
> > Add support for mmc on MT7988 SoC.
> >
> > Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
>
> There's no need to add yet one more duplicate mtk_mmc_compatible platform
> data, nor one more compatible string to this driver, as this is exactly
> the same as mt7986.
>
> Please reuse the MT7986 compatible; in DT you'll have:
>
> compatible = "mediatek,mt7988-mmc", "mediatek,mt7986-mmc";

as explained in binding, the clock config is completely different (except first 2 also required by driver - 3-7 are optional there). mt7988 uses axi and ahb clocks.

but i could of course use the mt7988 compatible with mt7986 compat data...but looked dirty to me so just copied the block (to allow later changes if needed).

> Cheers,
> Angelo
>
> > ---
> >   drivers/mmc/host/mtk-sd.c | 14 ++++++++++++++
> >   1 file changed, 14 insertions(+)
> >
> > diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> > index 89018b6c97b9..6d5afe51a61d 100644
> > --- a/drivers/mmc/host/mtk-sd.c
> > +++ b/drivers/mmc/host/mtk-sd.c
> > @@ -571,6 +571,19 @@ static const struct mtk_mmc_compatible mt7986_compat = {
> >   	.support_64g = true,
> >   };
> >
> > +static const struct mtk_mmc_compatible mt7988_compat = {
> > +	.clk_div_bits = 12,
> > +	.recheck_sdio_irq = true,
> > +	.hs400_tune = false,
> > +	.pad_tune_reg = MSDC_PAD_TUNE0,
> > +	.async_fifo = true,
> > +	.data_tune = true,
> > +	.busy_check = true,
> > +	.stop_clk_fix = true,
> > +	.enhance_rx = true,
> > +	.support_64g = true,
> > +};
> > +
> >   static const struct mtk_mmc_compatible mt8135_compat = {
> >   	.clk_div_bits = 8,
> >   	.recheck_sdio_irq = true,
> > @@ -629,6 +642,7 @@ static const struct of_device_id msdc_of_ids[] = {
> >   	{ .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
> >   	{ .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
> >   	{ .compatible = "mediatek,mt7986-mmc", .data = &mt7986_compat},
> > +	{ .compatible = "mediatek,mt7988-mmc", .data = &mt7988_compat},
> >   	{ .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
> >   	{ .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
> >   	{ .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
>
>