Add support for switching to DDR mode for eMMC devices. Signed-off-by: Jan Glauber <jglauber@xxxxxxxxxx> --- drivers/mmc/host/cavium.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/cavium.c b/drivers/mmc/host/cavium.c index eebb387..d842b69 100644 --- a/drivers/mmc/host/cavium.c +++ b/drivers/mmc/host/cavium.c @@ -864,6 +864,10 @@ static void cvm_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) break; } + /* DDR is available for 4/8 bit bus width */ + if (ios->bus_width && ios->timing == MMC_TIMING_MMC_DDR52) + bus_width |= 4; + /* Change the clock frequency. */ clock = ios->clock; if (clock > 52000000) @@ -1032,8 +1036,14 @@ int cvm_mmc_of_slot_probe(struct device *dev, struct cvm_mmc_host *host) /* Set up host parameters */ mmc->ops = &cvm_mmc_ops; + /* + * We only have a 3.3v supply, we cannot support any + * of the UHS modes. We do support the high speed DDR + * modes up to 52MHz. + */ mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | - MMC_CAP_ERASE | MMC_CAP_CMD23 | MMC_CAP_POWER_OFF_CARD; + MMC_CAP_ERASE | MMC_CAP_CMD23 | MMC_CAP_POWER_OFF_CARD | + MMC_CAP_3_3V_DDR; if (host->use_sg) mmc->max_segs = 16; -- 2.9.0.rc0.21.g7777322 -- 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
