From: Phil Reid <preid@electromag.com.au>
To: Anson Huang <anson.huang@nxp.com>,
"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>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"festevam@gmail.com" <festevam@gmail.com>
Cc: dl-linux-imx <linux-imx@nxp.com>
Subject: Re: [PATCH V4 2/2] iio: light: isl29018: add optional vdd/vdda regulator operation support
Date: Tue, 11 Dec 2018 11:36:12 +0800 [thread overview]
Message-ID: <d07b5970-5825-2ea6-9e27-538386927923@electromag.com.au> (raw)
In-Reply-To: <1544498291-2716-2-git-send-email-Anson.Huang@nxp.com>
On 11/12/2018 11:24 am, Anson Huang wrote:
> 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 vdd/vdda regulator operation support.
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
> ChangeLog since V3:
> - improve the error handling of devm_regulator_get_optional;
> - make sure regulators are disabled in error path.
> ---
> drivers/iio/light/isl29018.c | 83 ++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 80 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c
> index b45400f..a21652b 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 +96,8 @@ struct isl29018_chip {
> struct isl29018_scale scale;
> int prox_scheme;
> bool suspended;
> + struct regulator *vdd_reg;
> + struct regulator *vdda_reg;
> };
>
> static int isl29018_set_integration_time(struct isl29018_chip *chip,
> @@ -735,6 +738,34 @@ static int isl29018_probe(struct i2c_client *client,
>
> mutex_init(&chip->lock);
>
> + chip->vdd_reg = devm_regulator_get_optional(&client->dev, "vdd");
> + if (!IS_ERR(chip->vdd_reg)) {
> + err = regulator_enable(chip->vdd_reg);
> + if (err) {
> + dev_err(&client->dev, "failed to enable VDD regulator\n");
> + return err;
> + }
> + } else {
> + err = PTR_ERR(chip->vdd_reg);
> + if (err != -ENODEV)
> + return err;
> + }
> +
> + chip->vdda_reg = devm_regulator_get_optional(&client->dev, "vdda");
> + if (!IS_ERR(chip->vdda_reg)) {
> + err = regulator_enable(chip->vdda_reg);
> + if (err) {
> + dev_err(&client->dev, "failed to enable VDDA regulator\n");
> + if (!IS_ERR(chip->vdd_reg))
> + regulator_disable(chip->vdd_reg);
> + return err;
> + }
> + } else {
> + err = PTR_ERR(chip->vdda_reg);
> + if (err != -ENODEV)
> + return err;
maybe goto disable_regulators; to disable vdd.
> + }
> +
> chip->type = dev_id;
> chip->calibscale = 1;
> chip->ucalibscale = 0;
> @@ -747,12 +778,12 @@ static int isl29018_probe(struct i2c_client *client,
> if (IS_ERR(chip->regmap)) {
> err = PTR_ERR(chip->regmap);
> dev_err(&client->dev, "regmap initialization fails: %d\n", err);
> - return err;
> + goto disable_regulators;
> }
>
> err = isl29018_chip_init(chip);
> if (err)
> - return err;
> + goto disable_regulators;
>
> indio_dev->info = isl29018_chip_info_tbl[dev_id].indio_info;
> indio_dev->channels = isl29018_chip_info_tbl[dev_id].channels;
> @@ -761,13 +792,24 @@ static int isl29018_probe(struct i2c_client *client,
> indio_dev->dev.parent = &client->dev;
> indio_dev->modes = INDIO_DIRECT_MODE;
>
> - return devm_iio_device_register(&client->dev, indio_dev);
> + err = devm_iio_device_register(&client->dev, indio_dev);
> + if (!err)
> + return 0;
> +
> +disable_regulators:
> + if (!IS_ERR(chip->vdd_reg))
> + regulator_disable(chip->vdd_reg);
> + if (!IS_ERR(chip->vdda_reg))
> + regulator_disable(chip->vdda_reg);
> +
> + return err;
> }
>
[snip]
--
Regards
Phil
next prev parent reply other threads:[~2018-12-11 3:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-11 3:24 [PATCH V4 1/2] dt-bindings: iio: light: isl29018: update power supply name Anson Huang
2018-12-11 3:24 ` [PATCH V4 2/2] iio: light: isl29018: add optional vdd/vdda regulator operation support Anson Huang
2018-12-11 3:36 ` Phil Reid [this message]
2018-12-11 3:43 ` Anson Huang
2018-12-11 3:56 ` Phil Reid
2018-12-11 4:29 ` Anson Huang
2018-12-11 5:02 ` Phil Reid
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