On 07/03/18 15:20, Kishon Vijay Abraham I wrote:
> Though MMC controller can indicate HS200 mode capability (by
> using "mmc-hs200-1_8v" dt property), if the IO lines in the board
> is connected to 3.3v supply, HS200 mode cannot be supported.
> Such boards have "no-1-8-v" property in their dts file. Disable HS200
> mode for boards which have "no-1-8-v" set.
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 2ededa7f43df..aa8b5ca0d1b0 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -3672,6 +3672,7 @@ int sdhci_setup_host(struct sdhci_host *host)
> if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) {
> host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
> SDHCI_SUPPORT_DDR50);
> + mmc->caps2 &= ~MMC_CAP2_HS200;
Pedantically, shouldn't that be:
~(MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V)
We have MMC_CAP2_HSX00_1_2V so maybe we should add:
#define MMC_CAP2_HSX00_1_8V (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V)
And then
mmc->caps2 &= ~MMC_CAP2_HSX00_1_8V;
> }
>
> /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
>
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
