linux-kernel - RE: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for i.MXRT series

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Date:   Wed, 3 Nov 2021 02:19:45 +0000
From:   Bough Chen <haibo.chen@....com>
To:     Jesse Taube <mr.bossman075@...il.com>,
        dl-linux-imx <linux-imx@....com>
CC:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        Aisheng Dong <aisheng.dong@....com>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
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        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        Abel Vesa <abel.vesa@....com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "jirislaby@...nel.org" <jirislaby@...nel.org>,
        "giulio.benetti@...ettiengineering.com" 
        <giulio.benetti@...ettiengineering.com>,
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Subject: RE: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
 i.MXRT series

> -----Original Message-----
> From: Jesse Taube [mailto:mr.bossman075@...il.com]
> Sent: 2021年11月3日 6:57
> To: dl-linux-imx <linux-imx@....com>
> Cc: mturquette@...libre.com; sboyd@...nel.org; robh+dt@...nel.org;
> shawnguo@...nel.org; s.hauer@...gutronix.de; kernel@...gutronix.de;
> festevam@...il.com; ulf.hansson@...aro.org; Aisheng Dong
> <aisheng.dong@....com>; stefan@...er.ch; linus.walleij@...aro.org;
> gregkh@...uxfoundation.org; arnd@...db.de; olof@...om.net;
> soc@...nel.org; linux@...linux.org.uk; Abel Vesa <abel.vesa@....com>;
> adrian.hunter@...el.com; jirislaby@...nel.org;
> giulio.benetti@...ettiengineering.com; nobuhiro1.iwamatsu@...hiba.co.jp;
> Mr.Bossman075@...il.com; linux-clk@...r.kernel.org;
> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; linux-mmc@...r.kernel.org;
> linux-gpio@...r.kernel.org; linux-serial@...r.kernel.org; Jesse Taube
> <mr.bossman075@...il.com>
> Subject: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
i.MXRT
> series
> 
> From: Jesse Taube <mr.bossman075@...il.com>
> 
> Add support for i.MXRT1050's sdhc.
> 
> Cc: Giulio Benetti <giulio.benetti@...ettiengineering.com>
> Signed-off-by: Jesse Taube <Mr.Bossman075@...il.com>---
> V1->V2:
> * Nothing done
> ---
>  drivers/mmc/host/sdhci-esdhc-imx.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
> b/drivers/mmc/host/sdhci-esdhc-imx.c
> index afaf33707d46..c852a6df5611 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -305,6 +305,12 @@ static struct esdhc_soc_data usdhc_imx7ulp_data = {
>  			| ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400
>  			| ESDHC_FLAG_STATE_LOST_IN_LPMODE,
>  };
> +static struct esdhc_soc_data usdhc_imxrt_data = {
> +	.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING
> +			| ESDHC_FLAG_HS200 | ESDHC_FLAG_ERR004536
> +			| ESDHC_FLAG_BROKEN_AUTO_CMD23,
> +};
> +

Hi Jesse,
	I have few question here.
	Why only use manual tuning here? Does this usdhc don't support
standard tuning? or meet any issue when use standard tuning?
	Please also double check why not use ADMA in default? Any issue
found?
	

Best Regards
Haibo Chen
> 
>  static struct esdhc_soc_data usdhc_imx8qxp_data = {
>  	.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING @@ -357,6
> +363,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = {
>  	{ .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, },
>  	{ .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, },
>  	{ .compatible = "fsl,imx8mm-usdhc", .data = &usdhc_imx8mm_data, },
> +	{ .compatible = "fsl,imxrt-usdhc", .data = &usdhc_imxrt_data, },
>  	{ .compatible = "nxp,s32g2-usdhc", .data = &usdhc_s32g2_data, },
>  	{ /* sentinel */ }
>  };
> --
> 2.33.1


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