[PATCH] mmc: mxs-mmc: handle 'broken-cd' property

[Hector Palacios]

According to bindings documentation for mmc, the property 'broken-cd'
can be used to indicate card-detection is not available and polling
must be used instead. This patch retrieves this property
and sets a custom flag. On the get_cd() hook, it returns 1 if
the flag is set, to always assume the card is present.

Signed-off-by: Hector Palacios <hector.palacios@xxxxxxxx>
---
 drivers/mmc/host/mxs-mmc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 75dee88..10c07a8 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -73,6 +73,7 @@ struct mxs_mmc_host {
        int                             wp_gpio;
        bool                            wp_inverted;
        bool                            cd_inverted;
+       bool                            broken_cd;
        bool                            non_removable;
 };

@@ -97,7 +98,7 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
        struct mxs_mmc_host *host = mmc_priv(mmc);
        struct mxs_ssp *ssp = &host->ssp;

-       return host->non_removable ||
+       return host->non_removable || host->broken_cd ||
                !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
                  BM_SSP_STATUS_CARD_DETECT) ^ host->cd_inverted;
 }
@@ -689,6 +690,7 @@ static int mxs_mmc_probe(struct platform_device 
*pdev)
                mmc->caps |= MMC_CAP_4_BIT_DATA;
        else if (bus_width == 8)
                mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
+       host->broken_cd = of_property_read_bool(np, "broken-cd");
        host->non_removable = of_property_read_bool(np, 
"non-removable");
        if (host->non_removable)
                mmc->caps |= MMC_CAP_NONREMOVABLE;
--
1.8.2



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/