From: Grégor Boirie <gregor.boirie@xxxxxxxxxx>
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@xxxxxxxxxx>
---
drivers/iio/pressure/ms5611_core.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c
index acd8e37..992ad8d 100644
--- a/drivers/iio/pressure/ms5611_core.c
+++ b/drivers/iio/pressure/ms5611_core.c
@@ -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)
--
2.1.4
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