linux-kernel - Re: [PATCH v3 5/6] mmc: renesas_sdhi: merge clk_{start,stop} functions to set

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Message-ID: <CAPDyKFp-ziw_4zQGAj06YtHZbToiOenWXgxNLpsToPDtuU9tPw@mail.gmail.com>
Date:   Thu, 30 Aug 2018 14:30:23 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 5/6] mmc: renesas_sdhi: merge clk_{start,stop}
 functions to set_clock

On 23 August 2018 at 06:44, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> renesas_sdhi_clk_start() and renesas_sdhi_clk_stop() are now only
> called from renesas_sdhi_set_clock().  Merge them.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Applied for next, thanks!

Kind regards
Uffe

> ---
>
> Changes in v3: None
> Changes in v2: None
>
>  drivers/mmc/host/renesas_sdhi_core.c | 38 ++++++++++++------------------------
>  1 file changed, 12 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
> index cb6e889..0e88737 100644
> --- a/drivers/mmc/host/renesas_sdhi_core.c
> +++ b/drivers/mmc/host/renesas_sdhi_core.c
> @@ -155,35 +155,17 @@ static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host,
>         return ret == 0 ? best_freq : clk_get_rate(priv->clk);
>  }
>
> -static void renesas_sdhi_clk_start(struct tmio_mmc_host *host)
> +static void renesas_sdhi_set_clock(struct tmio_mmc_host *host,
> +                                  unsigned int new_clock)
>  {
> -       sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
> -               sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
> -
> -       /* HW engineers overrode docs: no sleep needed on R-Car2+ */
> -       if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
> -               usleep_range(10000, 11000);
> -}
> +       u32 clk = 0, clock;
>
> -static void renesas_sdhi_clk_stop(struct tmio_mmc_host *host)
> -{
>         sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
>                 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
>
> -       /* HW engineers overrode docs: no sleep needed on R-Car2+ */
> -       if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
> -               usleep_range(10000, 11000);
> -}
> -
> -static void renesas_sdhi_set_clock(struct tmio_mmc_host *host,
> -                                  unsigned int new_clock)
> -{
> -       u32 clk = 0, clock;
> +       if (new_clock == 0)
> +               goto out;
>
> -       if (new_clock == 0) {
> -               renesas_sdhi_clk_stop(host);
> -               return;
> -       }
>         /*
>          * Both HS400 and HS200/SD104 set 200MHz, but some devices need to
>          * set 400MHz to distinguish the CPG settings in HS400.
> @@ -206,13 +188,17 @@ static void renesas_sdhi_set_clock(struct tmio_mmc_host *host,
>                         clk &= ~0xff;
>         }
>
> -       sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
> -                       sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
>         sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
>         if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
>                 usleep_range(10000, 11000);
>
> -       renesas_sdhi_clk_start(host);
> +       sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
> +               sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
> +
> +out:
> +       /* HW engineers overrode docs: no sleep needed on R-Car2+ */
> +       if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
> +               usleep_range(10000, 11000);
>  }
>
>  static void renesas_sdhi_clk_disable(struct tmio_mmc_host *host)
> --
> 2.7.4
>