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| author | Wolfram Sang | 2017-10-14 21:17:09 +0200 |
|---|---|---|
| committer | Ulf Hansson | 2017-10-30 11:50:32 +0100 |
| commit | 1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d (patch) | |
| tree | 0abfa7b613a7c2ea128b141a5780da0738561f25 /drivers/mmc/core | |
| parent | mmc: sdhci-cadence: use bitfield access macros for cleanup (diff) | |
| download | kernel-qcow2-linux-1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d.tar.gz kernel-qcow2-linux-1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d.tar.xz kernel-qcow2-linux-1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d.zip | |
mmc: add kerneldoc to mmc_regulator_get_supply()
Especially, make clear what the return value means.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/core.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 12b271c2a912..1f0f44f4dd5f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1588,6 +1588,16 @@ EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); #endif /* CONFIG_REGULATOR */ +/** + * mmc_regulator_get_supply - try to get VMMC and VQMMC regulators for a host + * @mmc: the host to regulate + * + * Returns 0 or errno. errno should be handled, it is either a critical error + * or -EPROBE_DEFER. 0 means no critical error but it does not mean all + * regulators have been found because they all are optional. If you require + * certain regulators, you need to check separately in your driver if they got + * populated after calling this function. + */ int mmc_regulator_get_supply(struct mmc_host *mmc) { struct device *dev = mmc_dev(mmc); |