3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Tim Kryger <[email protected]> commit 3cbc6123a93dc91b99b58f7ea37d267fe93e1cad upstream. Host controllers lacking the required internal vmmc regulator may still follow the spec with regard to the LSB of SDHCI_POWER_CONTROL. Set the SDHCI_POWER_ON bit when vmmc is enabled to encourage the controller to to drive CMD, DAT, SDCLK. This fixes a regression observed on some Qualcomm and Nvidia boards caused by 5222161 mmc: sdhci: Improve external VDD regulator support. Fixes: 52221610dd84 (mmc: sdhci: Improve external VDD regulator support) Signed-off-by: Tim Kryger <[email protected]> Tested-by: Bjorn Andersson <[email protected]> Signed-off-by: Ulf Hansson <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/mmc/host/sdhci.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1239,6 +1239,12 @@ static void sdhci_set_power(struct sdhci spin_unlock_irq(&host->lock); mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); spin_lock_irq(&host->lock); + + if (mode != MMC_POWER_OFF) + sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); + else + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + return; } -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
