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From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Wed, 17 Jan 2018 10:33:28 +0100
Message-ID: <CAPDyKFrhBfGq0RBBdFLex+88XqrLB-Bm3rc2Q_UZCw8XB520ug@mail.gmail.com>
Subject: Re: [PATCH v2 03/15] mmc: mmci: Don't pretend all variants to have
 OPENDRAIN bit
To: Patrice CHOTARD <patrice.chotard@st.com>
Cc: Russell King <linux@armlinux.org.uk>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@codeaurora.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-clk <linux-clk@vger.kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
        devicetree@vger.kernel.org
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[...]

>  /* Busy detection for the ST Micro variant */
> @@ -1455,16 +1465,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>                                 ~MCI_ST_DATA2DIREN);
>         }
>
> -       if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) {
> -               if (host->hw_designer != AMBA_VENDOR_ST)
> -                       pwr |= MCI_ROD;
> -               else {
> -                       /*
> -                        * The ST Micro variant use the ROD bit for something
> -                        * else and only has OD (Open Drain).
> -                        */
> -                       pwr |= MCI_OD;
> -               }
> +       if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN &&
> +           host->variant->opendrain) {

A few nitpicks (because I anyway had some comment on patch4):

The above can be written on one line and the brackets isn't needed.

Replace host->variant->opendrain with variant->opendrain. The same
applies to the below change.

> +               /*
> +                * The ST Micro variant use the ROD bit for
> +                * something else and only has OD (Open Drain).
> +                */

I think we can remove this comment, as this information becomes
implicit when we start using the variant data.

> +               pwr |= host->variant->opendrain;
>         }
>
>         /*
> --
> 1.9.1
>

Kind regards
Uffe