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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2013-05-14 13:53:10 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-05-23 00:07:07 +0100 |
| commit | 7c0136ef773c206e242b9718740377a45747bd70 (patch) | |
| tree | 3daf9f446fbfd8f5b359a57987b629202548aaf4 | |
| parent | 1fd83f0ecf87e33ab560e8229842cf10f91552ee (diff) | |
| download | linux-7c0136ef773c206e242b9718740377a45747bd70.tar.gz linux-7c0136ef773c206e242b9718740377a45747bd70.tar.bz2 linux-7c0136ef773c206e242b9718740377a45747bd70.zip | |
ARM: 7721/1: mmc: mmci: Fixup regulator handling for vqmmc
We can not rely on regulator_is_enabled to decide whether to
enable|disable the regulator. It would mean that the reference
counter for it is not balanced properly.
Instead keep track of our internal state by using a new flag in
the host struct, so we can take correct decisions.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | drivers/mmc/host/mmci.c | 10 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.h | 1 |
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index c6d8b6216069..a8bbdd1c4314 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1156,9 +1156,10 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (!IS_ERR(mmc->supply.vmmc)) mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); - if (!IS_ERR(mmc->supply.vqmmc) && - regulator_is_enabled(mmc->supply.vqmmc)) + if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { regulator_disable(mmc->supply.vqmmc); + host->vqmmc_enabled = false; + } break; case MMC_POWER_UP: @@ -1174,12 +1175,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) break; case MMC_POWER_ON: - if (!IS_ERR(mmc->supply.vqmmc) && - !regulator_is_enabled(mmc->supply.vqmmc)) { + if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { ret = regulator_enable(mmc->supply.vqmmc); if (ret < 0) dev_err(mmc_dev(mmc), "failed to enable vqmmc regulator\n"); + else + host->vqmmc_enabled = true; } pwr |= MCI_PWR_ON; diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 1f33ad5333a0..1383c9ce2646 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -183,6 +183,7 @@ struct mmci_host { unsigned int cclk; u32 pwr_reg; u32 clk_reg; + bool vqmmc_enabled; struct mmci_platform_data *plat; struct variant_data *variant; |