On some systems we need a way to disable MMC card support in a MMC/SD
card slot. Add support in the dw_mmc to support this.
Signed-off-by: Doug Anderson <dianders@xxxxxxxxxxxx>
---
drivers/mmc/host/dw_mmc.c | 3 +++
include/linux/mmc/dw_mmc.h | 2 ++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index af40d22..09111bf 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1810,6 +1810,9 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED)
mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
+ if (host->pdata->quirks & DW_MCI_QUIRK_DISABLE_MMC)
+ mmc->caps2 |= MMC_CAP2_NO_MMC;
+
if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
else
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 7a7ebd3..5eaa9b9 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -201,6 +201,8 @@ struct dw_mci_dma_ops {
#define DW_MCI_QUIRK_HIGHSPEED BIT(2)
/* Unreliable card detection */
#define DW_MCI_QUIRK_BROKEN_CARD_DETECTION BIT(3)
+/* Only support SD cards, not MMC */
+#define DW_MCI_QUIRK_DISABLE_MMC BIT(4)
struct dma_pdata;
--
1.7.7.3
--
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