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    Subject[PATCH 11/19] mmc: mmci: add variant property to check specific data constraint
    Date
    From: Ludovic Barre <ludovic.barre@st.com>

    This patch adds a function pointer to check specific data constraint
    follow hardware variant. Needed to support the STM32 sdmmc variant
    which has alignment constraint.

    Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
    ---
    drivers/mmc/host/mmci.c | 5 +++++
    drivers/mmc/host/mmci.h | 2 ++
    2 files changed, 7 insertions(+)

    diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
    index abddad7..9c00804 100644
    --- a/drivers/mmc/host/mmci.c
    +++ b/drivers/mmc/host/mmci.c
    @@ -312,6 +312,8 @@ static int mmci_card_busy(struct mmc_host *mmc)
    static int mmci_validate_data(struct mmci_host *host,
    struct mmc_data *data)
    {
    + struct variant_data *variant = host->variant;
    +
    if (!data)
    return 0;

    @@ -321,6 +323,9 @@ static int mmci_validate_data(struct mmci_host *host,
    return -EINVAL;
    }

    + if (variant->validate_data)
    + return variant->validate_data(host, data);
    +
    return 0;
    }

    diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
    index 12ee2e6..30d3f53 100644
    --- a/drivers/mmc/host/mmci.h
    +++ b/drivers/mmc/host/mmci.h
    @@ -284,6 +284,7 @@ struct mmci_host;
    * register.
    * @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register
    * @mmci_dma: Pointer to platform-specific DMA callbacks.
    + * @validate_data: if hardware block has specific constraint on validate data
    * @set_clk_ios: if clock procedure of variant is specific
    * @set_pwr_ios: if power procedure of variant is specific
    */
    @@ -328,6 +329,7 @@ struct variant_data {
    u32 start_err;
    u32 opendrain;
    struct mmci_dma_ops *mmci_dma;
    + int (*validate_data)(struct mmci_host *host, struct mmc_data *data);
    void (*set_clkreg)(struct mmci_host *host, unsigned int desired);
    void (*set_pwrreg)(struct mmci_host *host, unsigned char power_mode,
    unsigned int pwr);
    --
    2.7.4
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