staging:iio:cdc:ad7150: Really basic regulator support.

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

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210314181511.531414-20-jic23@kernel.org

diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index c7d242f..e27ed84 100644 (file)
--- 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>
@@ -533,11 +534,19 @@ 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));
@@ -552,6 +561,18 @@ 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];