diff options
| author |   Stefan Agner <stefan@agner.ch> | 2018-06-28 09:31:36 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2018-07-16 11:21:45 +0200 |
| commit | 09c8192be713a30ace01ac00a90bc3361b7fcd12 (patch) | |
| tree | a8a17daafd67626d7f62a35309f8dab088accceb /drivers/mmc | |
| parent | mmc: core: Drop the unused mmc_power_save|restore_host() (diff) | |
| download | linux-dev-09c8192be713a30ace01ac00a90bc3361b7fcd12.tar.xz linux-dev-09c8192be713a30ace01ac00a90bc3361b7fcd12.zip | |
mmc: sdhci-esdhc-imx: support eMMC DDR mode when running at 3.3V
The uSDHC supports DDR modes for eMMC devices running at 3.3V. This
allows to run eMMC with 3.3V signaling voltage at DDR52 mode:
# cat /sys/kernel/debug/mmc1/ios
clock: 52000000 Hz
vdd: 21 (3.3 ~ 3.4 V)
bus mode: 2 (push-pull)
chip select: 0 (don't care)
power mode: 2 (on)
bus width: 3 (8 bits)
timing spec: 8 (mmc DDR52)
signal voltage: 0 (3.30 V)
driver type: 0 (driver type B)
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 4eb3d29ecde1..f9aa832735e4 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -1318,7 +1318,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) if (esdhc_is_usdhc(imx_data)) { host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; - host->mmc->caps |= MMC_CAP_1_8V_DDR; + host->mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR; if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200)) host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200; |