Add a function to get a regulator, supplying card's Vdd on a specific host.
If such a regulator is found, the function checks, whether a valid OCR mask
can be obtained from this regulator.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
v3: remove bogus attempts to ignore the dummy regulator, drop the check
for whether the regulator can change status, do not assign
MMC_CAP_POWER_OFF_CARD automatically. Thanks to Mark and Magnus for
comments.
drivers/mmc/core/core.c | 17 +++++++++++++++++
include/linux/mmc/host.h | 6 ++++++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0b6141d..0f92ec0 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1013,6 +1013,23 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
}
EXPORT_SYMBOL(mmc_regulator_set_ocr);
+struct regulator *mmc_regulator_get_vmmc(struct mmc_host *mmc)
+{
+ struct device *dev = mmc_dev(mmc);
+ struct regulator *supply = devm_regulator_get(dev, "vmmc");
+ int ret;
+
+ if (IS_ERR(supply))
+ return NULL;
+
+ ret = mmc_regulator_get_ocrmask(supply);
+ if (ret > 0)
+ mmc->ocr_avail = ret;
+
+ return supply;
+}
+EXPORT_SYMBOL(mmc_regulator_get_vmmc);
+
#endif /* CONFIG_REGULATOR */
/*
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 0707d22..368b317 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -364,6 +364,7 @@ int mmc_regulator_get_ocrmask(struct regulator *supply);
int mmc_regulator_set_ocr(struct mmc_host *mmc,
struct regulator *supply,
unsigned short vdd_bit);
+struct regulator *mmc_regulator_get_vmmc(struct mmc_host *mmc);
#else
static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
{
@@ -376,6 +377,11 @@ static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
{
return 0;
}
+
+static inline struct regulator *mmc_regulator_get_vmmc(struct mmc_host *mmc)
+{
+ return NULL;
+}
#endif
int mmc_card_awake(struct mmc_host *host);
--
1.7.2.5
--
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