From: Anson Huang <anson.huang@nxp.com>
To: "jic23@kernel.org" <jic23@kernel.org>,
"knaack.h@gmx.de" <knaack.h@gmx.de>,
"lars@metafoo.de" <lars@metafoo.de>,
"pmeerw@pmeerw.net" <pmeerw@pmeerw.net>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: dl-linux-imx <linux-imx@nxp.com>
Subject: [PATCH V2] iio: light: isl29018: add optional vcc regulator operation support
Date: Thu, 6 Dec 2018 03:33:16 +0000 [thread overview]
Message-ID: <1544066850-22617-1-git-send-email-Anson.Huang@nxp.com> (raw)
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>
---
ChangeLog:
replace "VDD" with "VCC" since the regulator name is vcc_reg.
---
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..87dcbce 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 VCC 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 VCC 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 VCC regulator\n");
+ mutex_unlock(&chip->lock);
+ return err;
+ }
+ }
+
err = isl29018_chip_init(chip);
if (!err)
chip->suspended = false;
--
2.7.4
next reply other threads:[~2018-12-06 3:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-06 3:33 Anson Huang [this message]
2018-12-08 12:09 ` [PATCH V2] iio: light: isl29018: add optional vcc regulator operation support Jonathan Cameron
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