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iio: temperature: tmp117: add support for vcc-supply

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Add support to specify the VCC supply which is required to power the
device. According the datasheet 7.3.1 Power Up, the device needs 1.5ms
after the supply voltage reaches the operating range before the
communcation can begin.

Signed-off-by: Thomas Haemmerle <thomas.haemmerle@leica-geosystems.com>
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.kernel.org/r/20240219131114.134607-2-m.felsch@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Thomas Haemmerle 2024-02-19 14:11:14 +01:00 committed by Jonathan Cameron
parent 7d87c9b94a
commit 42e03b0d37
1 changed files with 9 additions and 0 deletions
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9
drivers/iio/temperature/tmp117.c
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@ -9,6 +9,7 @@
* Note: This driver assumes that the sensor has been calibrated beforehand.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
@ -17,6 +18,7 @@
#include <linux/kernel.h>
#include <linux/limits.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/iio/iio.h>
@ -148,10 +150,17 @@ static int tmp117_probe(struct i2c_client *client)
struct tmp117_data *data;
struct iio_dev *indio_dev;
int dev_id;
int ret;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
return -EOPNOTSUPP;
ret = devm_regulator_get_enable(&client->dev, "vcc");
if (ret)
return ret;
fsleep(1500);
dev_id = i2c_smbus_read_word_swapped(client, TMP117_REG_DEVICE_ID);
if (dev_id < 0)
return dev_id;