mmc: Allow the tmio_mmc mfd driver to specify get_cd handler

Some controllers, supported by the tmio_mmc driver do not have the card
detect pin of a slot connected, so that polling needs to be used and
card detection is handled by other means.
This patch exposes a get_cd hook for that purpose.

Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 69d98e3..1a47221 100644 (file)
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -756,10 +756,23 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc)
                (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)) ? 0 : 1;
 }
 
+static int tmio_mmc_get_cd(struct mmc_host *mmc)
+{
+       struct tmio_mmc_host *host = mmc_priv(mmc);
+       struct mfd_cell *cell = host->pdev->dev.platform_data;
+       struct tmio_mmc_data *pdata = cell->driver_data;
+
+       if (!pdata->get_cd)
+               return -ENOSYS;
+       else
+               return pdata->get_cd(host->pdev);
+}
+
 static const struct mmc_host_ops tmio_mmc_ops = {
        .request        = tmio_mmc_request,
        .set_ios        = tmio_mmc_set_ios,
        .get_ro         = tmio_mmc_get_ro,
+       .get_cd         = tmio_mmc_get_cd,
 };
 
 #ifdef CONFIG_PM

diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index f07425b..24c43bb 100644 (file)
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -74,6 +74,7 @@ struct tmio_mmc_data {
        struct tmio_mmc_dma             *dma;
        void (*set_pwr)(struct platform_device *host, int state);
        void (*set_clk_div)(struct platform_device *host, int state);
+       int (*get_cd)(struct platform_device *host);
 };
 
 /*