diff options
| author | Jan Glauber <jglauber@cavium.com> | 2017-03-30 17:31:27 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:42:11 +0200 |
| commit | 4ce944074e5e2cb7ee48ff36608d65d0bc9c7647 (patch) | |
| tree | 86b61b3a0e9b5e38dea17835851430445dc41537 /drivers/mmc | |
| parent | mmc: cavium: Add scatter-gather DMA support (diff) | |
| download | linux-4ce944074e5e2cb7ee48ff36608d65d0bc9c7647.tar.xz linux-4ce944074e5e2cb7ee48ff36608d65d0bc9c7647.zip | |
mmc: cavium: Support DDR mode for eMMC devices
Add support for switching to DDR mode for eMMC devices.
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/cavium.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/mmc/host/cavium.c b/drivers/mmc/host/cavium.c index eebb387dc8c4..d842b6986189 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; |