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authorWolfram Sang <wsa+renesas@sang-engineering.com>2017-10-14 22:17:09 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2017-10-30 13:50:32 +0300
commit1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d (patch)
tree0abfa7b613a7c2ea128b141a5780da0738561f25 /drivers/mmc
parentf02cebdfe91a3818d4d71eb96a34fd90c9192c52 (diff)
downloadlinux-1f90e9a38c469e5abc1c7e06a8dd33dd9d2b922d.tar.xz
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')
-rw-r--r--drivers/mmc/core/core.c10
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);