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 <[email protected]> --- v4: 1. add _GPL to EXPORT_SYMBOL (note: a recently posted patch changes another occurrence of EXPORT_SYMBOL too, so, this patch will apply with a fuzz, if merged after) 2. add an optional vqmmc regulator, which also changes the function prototype 3. print a warning, if failed to get an OCR mask Thanks to all, who commented drivers/mmc/core/core.c | 27 +++++++++++++++++++++++++++ include/linux/mmc/host.h | 12 ++++++++++++ 2 files changed, 39 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 0b6141d..d77a238 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1013,6 +1013,33 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc, } EXPORT_SYMBOL(mmc_regulator_set_ocr); +int mmc_regulator_get_supply(struct mmc_host *mmc, struct mmc_supply *s) +{ + struct device *dev = mmc_dev(mmc); + struct regulator *supply; + int ret; + + if (!mmc || !s) + return -EINVAL; + + supply = devm_regulator_get(dev, "vmmc"); + + if (IS_ERR(supply)) + return PTR_ERR(supply); + + s->vmmc = supply; + s->vqmmc = devm_regulator_get(dev, "vqmmc"); + + 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 */ /* diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 0707d22..3192335 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -359,11 +359,17 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host) struct regulator; +struct mmc_supply { + struct regulator *vmmc; /* Card power supply */ + struct regulator *vqmmc; /* Optional Vccq supply */ +}; + #ifdef CONFIG_REGULATOR int mmc_regulator_get_ocrmask(struct regulator *supply); int mmc_regulator_set_ocr(struct mmc_host *mmc, struct regulator *supply, unsigned short vdd_bit); +int mmc_regulator_get_supply(struct mmc_host *mmc, struct mmc_supply *s); #else static inline int mmc_regulator_get_ocrmask(struct regulator *supply) { @@ -376,6 +382,12 @@ static inline int mmc_regulator_set_ocr(struct mmc_host *mmc, { return 0; } + +static inline int mmc_regulator_get_supply(struct mmc_host *mmc, + struct mmc_supply *s) +{ + return 0; +} #endif int mmc_card_awake(struct mmc_host *host); -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
