lkml.org 
[lkml]   [2022]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] iio: temperature: mlx90632 Add supply regulator to sensor
Date
Provide possibility to toggle power supply to the sensor so that user
can optimize their setup and not have the sensor constantly powered.

Signed-off-by: Crt Mori <cmo@melexis.com>
---
drivers/iio/temperature/mlx90632.c | 52 ++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index 7ee7ff8047a4..e6e5e649a9f9 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -18,6 +18,7 @@
#include <linux/math64.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -128,6 +129,7 @@
* calculations
* @object_ambient_temperature: Ambient temperature at object (might differ of
* the ambient temperature of sensor.
+ * @regulator: Regulator of the device
*/
struct mlx90632_data {
struct i2c_client *client;
@@ -136,6 +138,7 @@ struct mlx90632_data {
u16 emissivity;
u8 mtyp;
u32 object_ambient_temperature;
+ struct regulator *regulator;
};

static const struct regmap_range mlx90632_volatile_reg_range[] = {
@@ -841,6 +844,37 @@ static int mlx90632_wakeup(struct mlx90632_data *data)
return mlx90632_pwr_continuous(data->regmap);
}

+static void mlx90632_disable_regulator(void *_data)
+{
+ struct mlx90632_data *data = _data;
+ int ret;
+
+ ret = regulator_disable(data->regulator);
+ if (ret < 0)
+ dev_err(regmap_get_device(data->regmap),
+ "Failed to disable power regulator: %d\n", ret);
+}
+
+static int mlx90632_enable_regulator(struct mlx90632_data *data)
+{
+ int ret;
+
+ ret = regulator_set_voltage(data->regulator, 3200000, 3600000);
+ if (ret < 0) {
+ dev_err(regmap_get_device(data->regmap), "Failed to set voltage on regulator!\n");
+ return ret;
+ }
+
+ ret = regulator_enable(data->regulator);
+ if (ret < 0) {
+ dev_err(regmap_get_device(data->regmap), "Failed to enable power regulator!\n");
+ } else {
+ /* Give the device a little bit of time to start up. */
+ msleep(MLX90632_SLEEP_DELAY_MS);
+ }
+ return ret;
+}
+
static int mlx90632_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -876,6 +910,24 @@ static int mlx90632_probe(struct i2c_client *client,
indio_dev->channels = mlx90632_channels;
indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels);

+ mlx90632->regulator = devm_regulator_get(&client->dev, "vdd");
+ if (!IS_ERR(mlx90632->regulator)) {
+ ret = mlx90632_enable_regulator(mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to enable regulator!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&client->dev,
+ mlx90632_disable_regulator,
+ mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup regulator cleanup action %d\n",
+ ret);
+ return ret;
+ }
+ }
+
ret = mlx90632_wakeup(mlx90632);
if (ret < 0) {
dev_err(&client->dev, "Wakeup failed: %d\n", ret);
--
2.34.1
\
 
 \ /
  Last update: 2022-08-02 12:30    [W:0.060 / U:1.564 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site