[19/24] staging:iio:cdc:ad7150: Really basic regulator support.

Commit Message

Jonathan Cameron Feb. 7, 2021, 3:46 p.m. UTC

From: Jonathan Cameron <[e-mail]>

Given DT docs will include regulators, lets just turn them on and
off with driver probe() and remove().

Signed-off-by: Jonathan Cameron <[e-mail]>
---
 drivers/staging/iio/cdc/ad7150.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Patch

diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index a2aae370c231..0bc8c7a99883 100644
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -12,6 +12,7 @@ 
 #include <linux/i2c.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 
 #include <linux/iio/iio.h>
@@ -538,11 +539,19 @@  static const struct iio_info ad7150_info_no_irq = {
 	.read_raw = &ad7150_read_raw,
 };
 
+static void ad7150_reg_disable(void *data)
+{
+	struct regulator *reg = data;
+
+	regulator_disable(reg);
+}
+
 static int ad7150_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct ad7150_chip_info *chip;
 	struct iio_dev *indio_dev;
+	struct regulator *reg;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
@@ -557,6 +566,18 @@  static int ad7150_probe(struct i2c_client *client,
 
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
+	reg = devm_regulator_get(&client->dev, "vdd");
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
+
+	ret = regulator_enable(reg);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(&client->dev, ad7150_reg_disable, reg);
+	if (ret)
+		return ret;
+
 	chip->interrupts[0] = fwnode_irq_get(dev_fwnode(&client->dev), 0);
 	if (chip->interrupts[0] < 0)
 		return chip->interrupts[0];