lkml.org 
[lkml]   [2018]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] iio: light: isl29018: add optional vcc regulator operation support
Date
The light sensor's power supply could be controlled by regulator
on some platforms, such as i.MX6Q-SABRESD board, the light sensor
isl29023's power supply is controlled by a GPIO fixed regulator,
need to make sure the regulator is enabled before any operation of
sensor, this patch adds optional vcc regulator operation support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/iio/light/isl29018.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c
index b45400f..47a55c8 100644
--- a/drivers/iio/light/isl29018.c
+++ b/drivers/iio/light/isl29018.c
@@ -23,6 +23,7 @@
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -95,6 +96,7 @@ struct isl29018_chip {
struct isl29018_scale scale;
int prox_scheme;
bool suspended;
+ struct regulator *vcc_reg;
};

static int isl29018_set_integration_time(struct isl29018_chip *chip,
@@ -735,6 +737,15 @@ static int isl29018_probe(struct i2c_client *client,

mutex_init(&chip->lock);

+ chip->vcc_reg = devm_regulator_get_optional(&client->dev, "vcc");
+ if (!IS_ERR(chip->vcc_reg)) {
+ err = regulator_enable(chip->vcc_reg);
+ if (err) {
+ dev_err(&client->dev, "failed to enable VDD regulator\n");
+ return err;
+ }
+ }
+
chip->type = dev_id;
chip->calibscale = 1;
chip->ucalibscale = 0;
@@ -768,6 +779,7 @@ static int isl29018_probe(struct i2c_client *client,
static int isl29018_suspend(struct device *dev)
{
struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
+ int ret;

mutex_lock(&chip->lock);

@@ -777,6 +789,14 @@ static int isl29018_suspend(struct device *dev)
* So we do not have much to do here.
*/
chip->suspended = true;
+ if (!IS_ERR(chip->vcc_reg)) {
+ ret = regulator_disable(chip->vcc_reg);
+ if (ret) {
+ dev_err(dev, "failed to disable VDD regulator\n");
+ mutex_unlock(&chip->lock);
+ return ret;
+ }
+ }

mutex_unlock(&chip->lock);

@@ -790,6 +810,15 @@ static int isl29018_resume(struct device *dev)

mutex_lock(&chip->lock);

+ if (!IS_ERR(chip->vcc_reg)) {
+ err = regulator_enable(chip->vcc_reg);
+ if (err) {
+ dev_err(dev, "failed to enable VDD regulator\n");
+ mutex_unlock(&chip->lock);
+ return err;
+ }
+ }
+
err = isl29018_chip_init(chip);
if (!err)
chip->suspended = false;
--
2.7.4
\
 
 \ /
  Last update: 2018-12-06 04:16    [W:0.052 / U:7.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site