diff mbox

[01/17] mmc: tmio: add tmio_mmc_host_alloc/free()

Message ID 87siffuvj8.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State Not Applicable
Delegated to: Geert Uytterhoeven
Headers show

Commit Message

Kuninori Morimoto Jan. 13, 2015, 4:57 a.m. UTC
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Current tmio_mmc driver is using tmio_mmc_data for driver/platform
specific data/callback, and it is needed for tmio_mmc_host_probe()
function. Because of this style, include/linux/mfd/tmio.h header has
tmio driver/framework specific data which is not needed from platform.

This patch adds new tmio_mmc_host_alloc/free() as cleanup preparation.
tmio driver specific data/callback will be implemented in tmio_mmc_host,
and platform specific data/callback will be implemented in tmio_mmc_data
in this cleanup.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c |   14 +++++++++---
 drivers/mmc/host/tmio_mmc.c       |   10 +++++++--
 drivers/mmc/host/tmio_mmc.h       |    5 +++--
 drivers/mmc/host/tmio_mmc_pio.c   |   43 +++++++++++++++++++++++--------------
 include/linux/mfd/tmio.h          |    1 -
 5 files changed, 49 insertions(+), 24 deletions(-)

Comments

Ulf Hansson Jan. 20, 2015, 9:10 a.m. UTC | #1
+ MFD maintainer

On 13 January 2015 at 05:57, Kuninori Morimoto
<kuninori.morimoto.gx@renesas.com> wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
>
> Current tmio_mmc driver is using tmio_mmc_data for driver/platform
> specific data/callback, and it is needed for tmio_mmc_host_probe()
> function. Because of this style, include/linux/mfd/tmio.h header has
> tmio driver/framework specific data which is not needed from platform.
>
> This patch adds new tmio_mmc_host_alloc/free() as cleanup preparation.
> tmio driver specific data/callback will be implemented in tmio_mmc_host,
> and platform specific data/callback will be implemented in tmio_mmc_data
> in this cleanup.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  drivers/mmc/host/sh_mobile_sdhi.c |   14 +++++++++---
>  drivers/mmc/host/tmio_mmc.c       |   10 +++++++--
>  drivers/mmc/host/tmio_mmc.h       |    5 +++--
>  drivers/mmc/host/tmio_mmc_pio.c   |   43 +++++++++++++++++++++++--------------
>  include/linux/mfd/tmio.h          |    1 -
>  5 files changed, 49 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
> index 00c8ebd..cf062c4 100644
> --- a/drivers/mmc/host/sh_mobile_sdhi.c
> +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> @@ -113,7 +113,7 @@ static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
>                 udelay(1);
>
>         if (!timeout) {
> -               dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
> +               dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
>                 return -EBUSY;
>         }
>
> @@ -207,6 +207,12 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>                 goto eclkget;
>         }
>
> +       host = tmio_mmc_host_alloc(pdev);
> +       if (!host) {
> +               ret = -ENOMEM;
> +               goto eprobe;
> +       }
> +
>         mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
>         mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
>         mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
> @@ -274,9 +280,9 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>         /* SD control register space size is 0x100, 0x200 for bus_shift=1 */
>         mmc_data->bus_shift = resource_size(res) >> 9;
>
> -       ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
> +       ret = tmio_mmc_host_probe(host, mmc_data);
>         if (ret < 0)
> -               goto eprobe;
> +               goto efree;
>
>         /*
>          * FIXME:
> @@ -351,6 +357,8 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>
>  eirq:
>         tmio_mmc_host_remove(host);
> +efree:
> +       tmio_mmc_host_free(host);
>  eprobe:
>  eclkget:
>         if (p && p->cleanup)
> diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
> index 2616fdf..f47ae08 100644
> --- a/drivers/mmc/host/tmio_mmc.c
> +++ b/drivers/mmc/host/tmio_mmc.c
> @@ -92,10 +92,14 @@ static int tmio_mmc_probe(struct platform_device *pdev)
>         pdata->bus_shift = resource_size(res) >> 10;
>         pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
>
> -       ret = tmio_mmc_host_probe(&host, pdev, pdata);
> -       if (ret)
> +       host = tmio_mmc_host_alloc(pdev);
> +       if (!host)
>                 goto cell_disable;
>
> +       ret = tmio_mmc_host_probe(host, pdata);
> +       if (ret)
> +               goto host_free;
> +
>         ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
>                                 dev_name(&pdev->dev), host);
>         if (ret)
> @@ -108,6 +112,8 @@ static int tmio_mmc_probe(struct platform_device *pdev)
>
>  host_remove:
>         tmio_mmc_host_remove(host);
> +host_free:
> +       tmio_mmc_host_free(host);
>  cell_disable:
>         if (cell->disable)
>                 cell->disable(pdev);
> diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
> index a34ecbe..60d6747 100644
> --- a/drivers/mmc/host/tmio_mmc.h
> +++ b/drivers/mmc/host/tmio_mmc.h
> @@ -85,8 +85,9 @@ struct tmio_mmc_host {
>         bool                    sdio_irq_enabled;
>  };
>
> -int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> -                       struct platform_device *pdev,
> +struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
> +void tmio_mmc_host_free(struct tmio_mmc_host *host);
> +int tmio_mmc_host_probe(struct tmio_mmc_host *host,
>                         struct tmio_mmc_data *pdata);
>  void tmio_mmc_host_remove(struct tmio_mmc_host *host);
>  void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
> diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
> index 250bf8c..1a9a13f 100644
> --- a/drivers/mmc/host/tmio_mmc_pio.c
> +++ b/drivers/mmc/host/tmio_mmc_pio.c
> @@ -1054,12 +1054,35 @@ static void tmio_mmc_of_parse(struct platform_device *pdev,
>                 pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
>  }
>
> -int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> -                                 struct platform_device *pdev,
> -                                 struct tmio_mmc_data *pdata)
> +struct tmio_mmc_host*
> +tmio_mmc_host_alloc(struct platform_device *pdev)
>  {
> -       struct tmio_mmc_host *_host;
> +       struct tmio_mmc_host *host;
>         struct mmc_host *mmc;
> +
> +       mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
> +       if (!mmc)
> +               return NULL;
> +
> +       host = mmc_priv(mmc);
> +       host->mmc = mmc;
> +       host->pdev = pdev;
> +
> +       return host;
> +}
> +
> +void tmio_mmc_host_free(struct tmio_mmc_host *host)
> +{
> +       mmc_free_host(host->mmc);
> +
> +       host->mmc = NULL;
> +}
> +
> +int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
> +                       struct tmio_mmc_data *pdata)
> +{
> +       struct platform_device *pdev = _host->pdev;
> +       struct mmc_host *mmc = _host->mmc;
>         struct resource *res_ctl;
>         int ret;
>         u32 irq_mask = TMIO_MASK_CMD;
> @@ -1073,19 +1096,11 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
>         if (!res_ctl)
>                 return -EINVAL;
>
> -       mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
> -       if (!mmc)
> -               return -ENOMEM;
> -
>         ret = mmc_of_parse(mmc);
>         if (ret < 0)
>                 goto host_free;
>
> -       pdata->dev = &pdev->dev;
> -       _host = mmc_priv(mmc);
>         _host->pdata = pdata;
> -       _host->mmc = mmc;
> -       _host->pdev = pdev;
>         platform_set_drvdata(pdev, mmc);
>
>         _host->set_pwr = pdata->set_pwr;
> @@ -1192,12 +1207,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
>                 mmc_gpiod_request_cd_irq(mmc);
>         }
>
> -       *host = _host;
> -
>         return 0;
>
>  host_free:
> -       mmc_free_host(mmc);
>
>         return ret;
>  }
> @@ -1222,7 +1234,6 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
>         pm_runtime_disable(&pdev->dev);
>
>         iounmap(host->ctl);
> -       mmc_free_host(mmc);
>  }
>  EXPORT_SYMBOL(tmio_mmc_host_remove);
>
> diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
> index 5738817..c7d9af0 100644
> --- a/include/linux/mfd/tmio.h
> +++ b/include/linux/mfd/tmio.h
> @@ -135,7 +135,6 @@ struct tmio_mmc_data {
>         unsigned long                   bus_shift;
>         u32                             ocr_mask;       /* available voltages */
>         struct tmio_mmc_dma             *dma;
> -       struct device                   *dev;
>         unsigned int                    cd_gpio;
>         void (*set_pwr)(struct platform_device *host, int state);
>         void (*set_clk_div)(struct platform_device *host, int state);
> --
> 1.7.9.5
>
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Lee Jones Jan. 20, 2015, 9:38 a.m. UTC | #2
On Tue, 20 Jan 2015, Ulf Hansson wrote:

> + MFD maintainer
> 
> On 13 January 2015 at 05:57, Kuninori Morimoto
> <kuninori.morimoto.gx@renesas.com> wrote:
> > From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> >
> > Current tmio_mmc driver is using tmio_mmc_data for driver/platform
> > specific data/callback, and it is needed for tmio_mmc_host_probe()
> > function. Because of this style, include/linux/mfd/tmio.h header has
> > tmio driver/framework specific data which is not needed from platform.
> >
> > This patch adds new tmio_mmc_host_alloc/free() as cleanup preparation.
> > tmio driver specific data/callback will be implemented in tmio_mmc_host,
> > and platform specific data/callback will be implemented in tmio_mmc_data
> > in this cleanup.
> >
> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> > ---
> >  drivers/mmc/host/sh_mobile_sdhi.c |   14 +++++++++---
> >  drivers/mmc/host/tmio_mmc.c       |   10 +++++++--
> >  drivers/mmc/host/tmio_mmc.h       |    5 +++--
> >  drivers/mmc/host/tmio_mmc_pio.c   |   43 +++++++++++++++++++++++--------------
> >  include/linux/mfd/tmio.h          |    1 -

Acked-by: Lee Jones <lee.jones@linaro.org>

> >  5 files changed, 49 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
> > index 00c8ebd..cf062c4 100644
> > --- a/drivers/mmc/host/sh_mobile_sdhi.c
> > +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> > @@ -113,7 +113,7 @@ static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
> >                 udelay(1);
> >
> >         if (!timeout) {
> > -               dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
> > +               dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
> >                 return -EBUSY;
> >         }
> >
> > @@ -207,6 +207,12 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
> >                 goto eclkget;
> >         }
> >
> > +       host = tmio_mmc_host_alloc(pdev);
> > +       if (!host) {
> > +               ret = -ENOMEM;
> > +               goto eprobe;
> > +       }
> > +
> >         mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
> >         mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
> >         mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
> > @@ -274,9 +280,9 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
> >         /* SD control register space size is 0x100, 0x200 for bus_shift=1 */
> >         mmc_data->bus_shift = resource_size(res) >> 9;
> >
> > -       ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
> > +       ret = tmio_mmc_host_probe(host, mmc_data);
> >         if (ret < 0)
> > -               goto eprobe;
> > +               goto efree;
> >
> >         /*
> >          * FIXME:
> > @@ -351,6 +357,8 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
> >
> >  eirq:
> >         tmio_mmc_host_remove(host);
> > +efree:
> > +       tmio_mmc_host_free(host);
> >  eprobe:
> >  eclkget:
> >         if (p && p->cleanup)
> > diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
> > index 2616fdf..f47ae08 100644
> > --- a/drivers/mmc/host/tmio_mmc.c
> > +++ b/drivers/mmc/host/tmio_mmc.c
> > @@ -92,10 +92,14 @@ static int tmio_mmc_probe(struct platform_device *pdev)
> >         pdata->bus_shift = resource_size(res) >> 10;
> >         pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
> >
> > -       ret = tmio_mmc_host_probe(&host, pdev, pdata);
> > -       if (ret)
> > +       host = tmio_mmc_host_alloc(pdev);
> > +       if (!host)
> >                 goto cell_disable;
> >
> > +       ret = tmio_mmc_host_probe(host, pdata);
> > +       if (ret)
> > +               goto host_free;
> > +
> >         ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
> >                                 dev_name(&pdev->dev), host);
> >         if (ret)
> > @@ -108,6 +112,8 @@ static int tmio_mmc_probe(struct platform_device *pdev)
> >
> >  host_remove:
> >         tmio_mmc_host_remove(host);
> > +host_free:
> > +       tmio_mmc_host_free(host);
> >  cell_disable:
> >         if (cell->disable)
> >                 cell->disable(pdev);
> > diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
> > index a34ecbe..60d6747 100644
> > --- a/drivers/mmc/host/tmio_mmc.h
> > +++ b/drivers/mmc/host/tmio_mmc.h
> > @@ -85,8 +85,9 @@ struct tmio_mmc_host {
> >         bool                    sdio_irq_enabled;
> >  };
> >
> > -int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> > -                       struct platform_device *pdev,
> > +struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
> > +void tmio_mmc_host_free(struct tmio_mmc_host *host);
> > +int tmio_mmc_host_probe(struct tmio_mmc_host *host,
> >                         struct tmio_mmc_data *pdata);
> >  void tmio_mmc_host_remove(struct tmio_mmc_host *host);
> >  void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
> > diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
> > index 250bf8c..1a9a13f 100644
> > --- a/drivers/mmc/host/tmio_mmc_pio.c
> > +++ b/drivers/mmc/host/tmio_mmc_pio.c
> > @@ -1054,12 +1054,35 @@ static void tmio_mmc_of_parse(struct platform_device *pdev,
> >                 pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
> >  }
> >
> > -int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> > -                                 struct platform_device *pdev,
> > -                                 struct tmio_mmc_data *pdata)
> > +struct tmio_mmc_host*
> > +tmio_mmc_host_alloc(struct platform_device *pdev)
> >  {
> > -       struct tmio_mmc_host *_host;
> > +       struct tmio_mmc_host *host;
> >         struct mmc_host *mmc;
> > +
> > +       mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
> > +       if (!mmc)
> > +               return NULL;
> > +
> > +       host = mmc_priv(mmc);
> > +       host->mmc = mmc;
> > +       host->pdev = pdev;
> > +
> > +       return host;
> > +}
> > +
> > +void tmio_mmc_host_free(struct tmio_mmc_host *host)
> > +{
> > +       mmc_free_host(host->mmc);
> > +
> > +       host->mmc = NULL;
> > +}
> > +
> > +int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
> > +                       struct tmio_mmc_data *pdata)
> > +{
> > +       struct platform_device *pdev = _host->pdev;
> > +       struct mmc_host *mmc = _host->mmc;
> >         struct resource *res_ctl;
> >         int ret;
> >         u32 irq_mask = TMIO_MASK_CMD;
> > @@ -1073,19 +1096,11 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> >         if (!res_ctl)
> >                 return -EINVAL;
> >
> > -       mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
> > -       if (!mmc)
> > -               return -ENOMEM;
> > -
> >         ret = mmc_of_parse(mmc);
> >         if (ret < 0)
> >                 goto host_free;
> >
> > -       pdata->dev = &pdev->dev;
> > -       _host = mmc_priv(mmc);
> >         _host->pdata = pdata;
> > -       _host->mmc = mmc;
> > -       _host->pdev = pdev;
> >         platform_set_drvdata(pdev, mmc);
> >
> >         _host->set_pwr = pdata->set_pwr;
> > @@ -1192,12 +1207,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
> >                 mmc_gpiod_request_cd_irq(mmc);
> >         }
> >
> > -       *host = _host;
> > -
> >         return 0;
> >
> >  host_free:
> > -       mmc_free_host(mmc);
> >
> >         return ret;
> >  }
> > @@ -1222,7 +1234,6 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
> >         pm_runtime_disable(&pdev->dev);
> >
> >         iounmap(host->ctl);
> > -       mmc_free_host(mmc);
> >  }
> >  EXPORT_SYMBOL(tmio_mmc_host_remove);
> >
> > diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
> > index 5738817..c7d9af0 100644
> > --- a/include/linux/mfd/tmio.h
> > +++ b/include/linux/mfd/tmio.h
> > @@ -135,7 +135,6 @@ struct tmio_mmc_data {
> >         unsigned long                   bus_shift;
> >         u32                             ocr_mask;       /* available voltages */
> >         struct tmio_mmc_dma             *dma;
> > -       struct device                   *dev;
> >         unsigned int                    cd_gpio;
> >         void (*set_pwr)(struct platform_device *host, int state);
> >         void (*set_clk_div)(struct platform_device *host, int state);
> >
diff mbox

Patch

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 00c8ebd..cf062c4 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -113,7 +113,7 @@  static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
 		udelay(1);
 
 	if (!timeout) {
-		dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
+		dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
 		return -EBUSY;
 	}
 
@@ -207,6 +207,12 @@  static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		goto eclkget;
 	}
 
+	host = tmio_mmc_host_alloc(pdev);
+	if (!host) {
+		ret = -ENOMEM;
+		goto eprobe;
+	}
+
 	mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
 	mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
 	mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
@@ -274,9 +280,9 @@  static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
 	mmc_data->bus_shift = resource_size(res) >> 9;
 
-	ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
+	ret = tmio_mmc_host_probe(host, mmc_data);
 	if (ret < 0)
-		goto eprobe;
+		goto efree;
 
 	/*
 	 * FIXME:
@@ -351,6 +357,8 @@  static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 
 eirq:
 	tmio_mmc_host_remove(host);
+efree:
+	tmio_mmc_host_free(host);
 eprobe:
 eclkget:
 	if (p && p->cleanup)
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 2616fdf..f47ae08 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -92,10 +92,14 @@  static int tmio_mmc_probe(struct platform_device *pdev)
 	pdata->bus_shift = resource_size(res) >> 10;
 	pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
 
-	ret = tmio_mmc_host_probe(&host, pdev, pdata);
-	if (ret)
+	host = tmio_mmc_host_alloc(pdev);
+	if (!host)
 		goto cell_disable;
 
+	ret = tmio_mmc_host_probe(host, pdata);
+	if (ret)
+		goto host_free;
+
 	ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
 				dev_name(&pdev->dev), host);
 	if (ret)
@@ -108,6 +112,8 @@  static int tmio_mmc_probe(struct platform_device *pdev)
 
 host_remove:
 	tmio_mmc_host_remove(host);
+host_free:
+	tmio_mmc_host_free(host);
 cell_disable:
 	if (cell->disable)
 		cell->disable(pdev);
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index a34ecbe..60d6747 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -85,8 +85,9 @@  struct tmio_mmc_host {
 	bool			sdio_irq_enabled;
 };
 
-int tmio_mmc_host_probe(struct tmio_mmc_host **host,
-			struct platform_device *pdev,
+struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
+void tmio_mmc_host_free(struct tmio_mmc_host *host);
+int tmio_mmc_host_probe(struct tmio_mmc_host *host,
 			struct tmio_mmc_data *pdata);
 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 250bf8c..1a9a13f 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1054,12 +1054,35 @@  static void tmio_mmc_of_parse(struct platform_device *pdev,
 		pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
 }
 
-int tmio_mmc_host_probe(struct tmio_mmc_host **host,
-				  struct platform_device *pdev,
-				  struct tmio_mmc_data *pdata)
+struct tmio_mmc_host*
+tmio_mmc_host_alloc(struct platform_device *pdev)
 {
-	struct tmio_mmc_host *_host;
+	struct tmio_mmc_host *host;
 	struct mmc_host *mmc;
+
+	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
+	if (!mmc)
+		return NULL;
+
+	host = mmc_priv(mmc);
+	host->mmc = mmc;
+	host->pdev = pdev;
+
+	return host;
+}
+
+void tmio_mmc_host_free(struct tmio_mmc_host *host)
+{
+	mmc_free_host(host->mmc);
+
+	host->mmc = NULL;
+}
+
+int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
+			struct tmio_mmc_data *pdata)
+{
+	struct platform_device *pdev = _host->pdev;
+	struct mmc_host *mmc = _host->mmc;
 	struct resource *res_ctl;
 	int ret;
 	u32 irq_mask = TMIO_MASK_CMD;
@@ -1073,19 +1096,11 @@  int tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	if (!res_ctl)
 		return -EINVAL;
 
-	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
-	if (!mmc)
-		return -ENOMEM;
-
 	ret = mmc_of_parse(mmc);
 	if (ret < 0)
 		goto host_free;
 
-	pdata->dev = &pdev->dev;
-	_host = mmc_priv(mmc);
 	_host->pdata = pdata;
-	_host->mmc = mmc;
-	_host->pdev = pdev;
 	platform_set_drvdata(pdev, mmc);
 
 	_host->set_pwr = pdata->set_pwr;
@@ -1192,12 +1207,9 @@  int tmio_mmc_host_probe(struct tmio_mmc_host **host,
 		mmc_gpiod_request_cd_irq(mmc);
 	}
 
-	*host = _host;
-
 	return 0;
 
 host_free:
-	mmc_free_host(mmc);
 
 	return ret;
 }
@@ -1222,7 +1234,6 @@  void tmio_mmc_host_remove(struct tmio_mmc_host *host)
 	pm_runtime_disable(&pdev->dev);
 
 	iounmap(host->ctl);
-	mmc_free_host(mmc);
 }
 EXPORT_SYMBOL(tmio_mmc_host_remove);
 
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 5738817..c7d9af0 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -135,7 +135,6 @@  struct tmio_mmc_data {
 	unsigned long			bus_shift;
 	u32				ocr_mask;	/* available voltages */
 	struct tmio_mmc_dma		*dma;
-	struct device			*dev;
 	unsigned int			cd_gpio;
 	void (*set_pwr)(struct platform_device *host, int state);
 	void (*set_clk_div)(struct platform_device *host, int state);