On Fri, 28 Aug 2020 at 23:48, Stefan Wahren <stefan.wahren@xxxxxxxx> wrote: > > The emmc2 interface on the bcm2711 supports DDR modes for eMMC devices > running at 3.3V. This allows to run eMMC module with 3.3V signaling voltage > at DDR52 mode on the Raspberry Pi 4 using a SD adapter: > > clock: 52000000 Hz > actual clock: 50000000 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: 2 (4 bits) > timing spec: 8 (mmc DDR52) > signal voltage: 0 (3.30 V) > driver type: 0 (driver type B) > > Link: https://github.com/raspberrypi/linux/issues/3802 > Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/sdhci-iproc.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c > index e2d8dfe..b540aa6 100644 > --- a/drivers/mmc/host/sdhci-iproc.c > +++ b/drivers/mmc/host/sdhci-iproc.c > @@ -283,6 +283,7 @@ static const struct sdhci_pltfm_data sdhci_bcm2711_pltfm_data = { > > static const struct sdhci_iproc_data bcm2711_data = { > .pdata = &sdhci_bcm2711_pltfm_data, > + .mmc_caps = MMC_CAP_3_3V_DDR, > }; > > static const struct of_device_id sdhci_iproc_of_match[] = { > -- > 2.7.4 >
