Some boards use fixed voltage regulator for vmmc supply (e.g. for eMMC memories). MMC_CAP2_BROKEN_VOLTAGE must be enabled for them to operate correctly.
Cc: Ben Dooks <[email protected]> Cc: Chris Ball <[email protected]> CC: [email protected] Signed-off-by: Tomasz Figa <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> --- Documentation/devicetree/bindings/mmc/mmc.txt | 1 + drivers/mmc/host/sdhci-s3c.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 8a6811f..ecbde68 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -16,6 +16,7 @@ Optional properties: - wp-inverted: when present, polarity on the wp gpio line is inverted - non-removable: non-removable slot (like eMMC) - max-frequency: maximum operating clock frequency +- broken-voltage: vmmc regulator does not allow voltage control Example: diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c index 445910e..39715b8 100644 --- a/drivers/mmc/host/sdhci-s3c.c +++ b/drivers/mmc/host/sdhci-s3c.c @@ -443,6 +443,9 @@ static int __devinit sdhci_s3c_parse_dt(struct device *dev, if (!ourhost->gpios) return -ENOMEM; + if (of_get_property(node, "broken-voltage", 0)) + pdata->host_caps2 |= MMC_CAP2_BROKEN_VOLTAGE; + /* get the card detection method */ if (of_get_property(node, "broken-cd", 0)) { pdata->cd_type = S3C_SDHCI_CD_NONE; -- 1.7.12 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
