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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2012-06-20 02:28:43 -0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-07-21 00:02:08 -0400 |
| commit | e137788dd115dd9d21759a768dba5fff9685e587 (patch) | |
| tree | 93c2bcea03d7e8799db1e575530cdfc4b534a932 /drivers | |
| parent | 6de707f200f73af7a58b58b3a5b956cff7b6e228 (diff) | |
| download | linux-3.10-e137788dd115dd9d21759a768dba5fff9685e587.tar.gz linux-3.10-e137788dd115dd9d21759a768dba5fff9685e587.tar.bz2 linux-3.10-e137788dd115dd9d21759a768dba5fff9685e587.zip | |
mmc: add a function to get regulators, supplying card's power
Add a function to get regulators, supplying card's Vdd and Vccq on a
specific host. If a Vdd supplying regulator is found, the function checks,
whether a valid OCR mask can be obtained from it. The Vccq regulator is
optional. A failure to get it is not fatal.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/core/core.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 28b1ffaf0bd..8d00aef9523 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1022,6 +1022,29 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc, } EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); +int mmc_regulator_get_supply(struct mmc_host *mmc) +{ + struct device *dev = mmc_dev(mmc); + struct regulator *supply; + int ret; + + supply = devm_regulator_get(dev, "vmmc"); + mmc->supply.vmmc = supply; + mmc->supply.vqmmc = devm_regulator_get(dev, "vqmmc"); + + if (IS_ERR(supply)) + return PTR_ERR(supply); + + ret = mmc_regulator_get_ocrmask(supply); + if (ret > 0) + mmc->ocr_avail = ret; + else + dev_warn(mmc_dev(mmc), "Failed getting OCR mask: %d\n", ret); + + return 0; +} +EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); + #endif /* CONFIG_REGULATOR */ /* |