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iio:pressure:ms5611: power regulator support 

Add support for an optional regulator which, if found into device-tree,
will power on device at probing time.
The regulator is declared into ms5611 DTS entry as a "vdd-supply" property.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Grégor Boirie 2016-02-17 18:52:51 +01:00 committed by Jonathan Cameron
parent eac635ebad
commit 3145229f91
1 changed files with 13 additions and 0 deletions
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13
drivers/iio/pressure/ms5611_core.c
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@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/iio/buffer.h>
#include <linux/iio/triggered_buffer.h>
@ -290,6 +291,18 @@ static const struct iio_info ms5611_info = {
static int ms5611_init(struct iio_dev *indio_dev)
{
int ret;
struct regulator *vdd = devm_regulator_get(indio_dev->dev.parent,
"vdd");
/* Enable attached regulator if any. */
if (!IS_ERR(vdd)) {
ret = regulator_enable(vdd);
if (ret) {
dev_err(indio_dev->dev.parent,
"failed to enable Vdd supply: %d\n", ret);
return ret;
}
}
ret = ms5611_reset(indio_dev);
if (ret < 0)