Re: [PATCH v4 06/13] mmc: mmci: add ddrmode mask to variant data

[Ulf Hansson]

On 28 May 2014 15:46,  <srinivas.kandagatla@xxxxxxxxxx> wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
>
> This patch adds ddrmode mask to variant structure giving more flexibility
> to the driver to support more SOCs which have different datactrl register
> layout.
>
> Without this patch datactrl register is updated with wrong ddrmode mask on non
> ST SOCs, resulting in card detection failures.

The above statement seems not correct. We don't have any issues
currently, right. :-)

Kind regards
Ulf Hansson

>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
>  drivers/mmc/host/mmci.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 23401b0..729105b 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -59,6 +59,7 @@ static unsigned int fmax = 515633;
>   *               is asserted (likewise for RX)
>   * @sdio: variant supports SDIO
>   * @st_clkdiv: true if using a ST-specific clock divider algorithm
> + * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
>   * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
>   * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
>   *                  register
> @@ -74,6 +75,7 @@ struct variant_data {
>         unsigned int            datalength_bits;
>         unsigned int            fifosize;
>         unsigned int            fifohalfsize;
> +       unsigned int            datactrl_mask_ddrmode;
>         bool                    sdio;
>         bool                    st_clkdiv;
>         bool                    blksz_datactrl16;
> @@ -152,6 +154,7 @@ static struct variant_data variant_ux500v2 = {
>         .fifohalfsize           = 8 * 4,
>         .clkreg                 = MCI_CLK_ENABLE,
>         .clkreg_enable          = MCI_ST_UX500_HWFCEN,
> +       .datactrl_mask_ddrmode  = MCI_ST_DPSM_DDRMODE,
>         .datalength_bits        = 24,
>         .sdio                   = true,
>         .st_clkdiv              = true,
> @@ -779,7 +782,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
>                 }
>
>         if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
> -               datactrl |= MCI_ST_DPSM_DDRMODE;
> +               datactrl |= variant->datactrl_mask_ddrmode;
>
>         /*
>          * Attempt to use DMA operation mode, if this
> --
> 1.9.1
>
--
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/