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| author | Tim Kryger <tim.kryger@gmail.com> | 2015-01-14 07:24:12 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-01-14 09:47:19 +0100 |
| commit | 3cbc6123a93dc91b99b58f7ea37d267fe93e1cad (patch) | |
| tree | 743f0cce9086cc25ff6b71d134d0cd51319f85f0 /drivers | |
| parent | 188c901941efd43cbf21e8f4f9e9a276536b989c (diff) | |
| download | linux-3cbc6123a93dc91b99b58f7ea37d267fe93e1cad.tar.gz linux-3cbc6123a93dc91b99b58f7ea37d267fe93e1cad.tar.bz2 linux-3cbc6123a93dc91b99b58f7ea37d267fe93e1cad.zip | |
mmc: sdhci: Set SDHCI_POWER_ON with external vmmc
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 <tim.kryger@gmail.com>
Tested-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1453cd127921..f1a488ee432f 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1271,6 +1271,12 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned char mode, 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; } |