summaryrefslogtreecommitdiffstats
path: root/drivers/iio/temperature
diff options
context:
space:
mode:
authorThomas Haemmerle <thomas.haemmerle@leica-geosystems.com>2024-02-19 14:11:14 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2024-02-28 20:26:35 +0100
commit42e03b0d371a61478ac6fd992bb4183bdccb3028 (patch)
treed8cd5a2346f1abd0d7a69d830407bebfea18e773 /drivers/iio/temperature
parentdt-bindings: iio: ti,tmp117: add vcc supply binding (diff)
downloadlinux-42e03b0d371a61478ac6fd992bb4183bdccb3028.tar.xz
linux-42e03b0d371a61478ac6fd992bb4183bdccb3028.zip
iio: temperature: tmp117: add support for vcc-supply
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>
Diffstat (limited to 'drivers/iio/temperature')
-rw-r--r--drivers/iio/temperature/tmp117.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iio/temperature/tmp117.c b/drivers/iio/temperature/tmp117.c
index 059953015ae7..8972083d903a 100644
--- a/drivers/iio/temperature/tmp117.c
+++ b/drivers/iio/temperature/tmp117.c
@@ -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;