[PATCH v3 3/5] proximity: vl53l0x: Handle the VDD regulator

Markuss Broks
2022-05-12T11:08:41Z

Handle the regulator supplying the VDD pin of VL53L0X.

Signed-off-by: Markuss Broks <markuss.broks@gmail.com>
---
drivers/iio/proximity/vl53l0x-i2c.c | 37 +++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/drivers/iio/proximity/vl53l0x-i2c.c b/drivers/iio/proximity/vl53l0x-i2c.c
index 12a3e2eff464..d8523e3981e8 100644
--- a/drivers/iio/proximity/vl53l0x-i2c.c
+++ b/drivers/iio/proximity/vl53l0x-i2c.c
@@ -43,6 +43,7 @@
struct vl53l0x_data {
struct i2c_client *client;
struct completion completion;
+ struct regulator *vdd_supply;
};

static irqreturn_t vl53l0x_handle_irq(int irq, void *priv)
@@ -192,10 +193,31 @@ static const struct iio_info vl53l0x_info = {
.read_raw = vl53l0x_read_raw,
};

+static void vl53l0x_power_off(void *_data)
+{
+ struct vl53l0x_data *data = _data;
+
+ regulator_disable(data->vdd_supply);
+}
+
+static int vl53l0x_power_on(struct vl53l0x_data *data)
+{
+ int ret;
+
+ ret = regulator_enable(data->vdd_supply);
+ if (ret)
+ return ret;
+
+ usleep_range(3200, 5000);
+
+ return 0;
+}
+
static int vl53l0x_probe(struct i2c_client *client)
{
struct vl53l0x_data *data;
struct iio_dev *indio_dev;
+ int error;

indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
@@ -210,6 +232,21 @@ static int vl53l0x_probe(struct i2c_client *client)
I2C_FUNC_SMBUS_BYTE_DATA))
return -EOPNOTSUPP;

+ data->vdd_supply = devm_regulator_get_optional(&client->dev, "vdd");
+ if (IS_ERR(data->vdd_supply))
+ return dev_err_probe(&client->dev, PTR_ERR(data->vdd_supply),
+ "Unable to get VDD regulator\n");
+
+ error = devm_add_action_or_reset(&client->dev, vl53l0x_power_off, data);
+ if (error)
+ return dev_err_probe(&client->dev, error,
+ "Failed to install poweroff action\n");
+
+ error = vl53l0x_power_on(data);
+ if (error)
+ return dev_err_probe(&client->dev, error,
+ "Failed to power on the chip\n");
+
indio_dev->name = "vl53l0x";
indio_dev->info = &vl53l0x_info;
indio_dev->channels = vl53l0x_channels;
--
2.36.1