diff options
Diffstat (limited to 'drivers/mmc/core/regulator.c')
| -rw-r--r-- | drivers/mmc/core/regulator.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/mmc/core/regulator.c b/drivers/mmc/core/regulator.c index 609201a467ef..005247a49e51 100644 --- a/drivers/mmc/core/regulator.c +++ b/drivers/mmc/core/regulator.c @@ -110,6 +110,9 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc, int result = 0; int min_uV, max_uV; + if (IS_ERR(supply)) + return 0; + if (vdd_bit) { mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV); @@ -271,3 +274,44 @@ int mmc_regulator_get_supply(struct mmc_host *mmc) return 0; } EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); + +/** + * mmc_regulator_enable_vqmmc - enable VQMMC regulator for a host + * @mmc: the host to regulate + * + * Returns 0 or errno. Enables the regulator for vqmmc. + * Keeps track of the enable status for ensuring that calls to + * regulator_enable/disable are balanced. + */ +int mmc_regulator_enable_vqmmc(struct mmc_host *mmc) +{ + int ret = 0; + + if (!IS_ERR(mmc->supply.vqmmc) && !mmc->vqmmc_enabled) { + ret = regulator_enable(mmc->supply.vqmmc); + if (ret < 0) + dev_err(mmc_dev(mmc), "enabling vqmmc regulator failed\n"); + else + mmc->vqmmc_enabled = true; + } + + return ret; +} +EXPORT_SYMBOL_GPL(mmc_regulator_enable_vqmmc); + +/** + * mmc_regulator_disable_vqmmc - disable VQMMC regulator for a host + * @mmc: the host to regulate + * + * Returns 0 or errno. Disables the regulator for vqmmc. + * Keeps track of the enable status for ensuring that calls to + * regulator_enable/disable are balanced. + */ +void mmc_regulator_disable_vqmmc(struct mmc_host *mmc) +{ + if (!IS_ERR(mmc->supply.vqmmc) && mmc->vqmmc_enabled) { + regulator_disable(mmc->supply.vqmmc); + mmc->vqmmc_enabled = false; + } +} +EXPORT_SYMBOL_GPL(mmc_regulator_disable_vqmmc); |