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Message-ID: <20191102142245.57bb5812@archlinux>
Date: Sat, 2 Nov 2019 14:22:45 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
linux-iio@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v2] iio: pressure: bmp280: use devm action and remove
labels from probe
On Thu, 31 Oct 2019 07:46:51 +0100
Bartosz Golaszewski <brgl@...ev.pl> wrote:
> wt., 22 paź 2019 o 12:15 Jonathan Cameron <jic23@...nel.org> napisał(a):
> >
> > On Mon, 21 Oct 2019 14:47:18 +0200
> > Bartosz Golaszewski <brgl@...ev.pl> wrote:
> >
> > > sob., 12 paź 2019 o 15:37 Jonathan Cameron <jic23@...nel.org> napisał(a):
> > > >
> > > > On Mon, 7 Oct 2019 04:41:31 +0200
> > > > Bartosz Golaszewski <brgl@...ev.pl> wrote:
> > > >
> > > > > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > > > >
> > > > > We can drop some duplicate code if we use devm_action for disabling
> > > > > regulators and pm and the managed variant of iio_device_register().
> > > > >
> > > > > This allows us to completely remove all remove() callbacks from both
> > > > > i2c and spi code.
> > > > >
> > > > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > > > This is on top of the bulk regulator patch which is awaiting precusors
> > > > getting to my upstream. I'll hold this one as well on that.
> > > >
> > > > If it looks like I've forgotten it then give me a poke.
> > > >
> > >
> > > Hi Jonathan,
> > >
> > > gentle poke after v5.4-rc4. Only one of the three patches is in next
> > > so far, the one using bulk regulators is missing too besides this one.
> > Thanks for the reminder.
> >
> > Applied to the togreg branch of iio.git and pushed out as testing for the
> > autobuilders to play with it.
> >
>
> Hi,
>
> I don't see it in the togreg branch of the iio tree - did something go
> wrong with testing?
I tend to only get to my laptop ever few days + 0-day has taken to timing
out half the time at the moment (which means you end up waiting another day
for late running tests to complete). So can be a week or more before things
make it to the togreg branch. Sometimes I forget entirely and it only
happens when I get a pull request ready.
Anyhow, should be in Greg's tree and linux-next by now.
Thanks,
Jonathan
>
> Bart
>
> > Thanks,
> >
> > Jonathan
> > >
> > > Best regards,
> > > Bartosz Golaszewski
> > >
> > > > Thanks,
> > > >
> > > > Jonathan
> > > >
> > > > > ---
> > > > > v1 -> v2:
> > > > > - squash the patches using devm_iio_device_register() and devm_action
> > > > > to keep the changes bisectable
> > > > >
> > > > > drivers/iio/pressure/bmp280-core.c | 62 +++++++++++++++---------------
> > > > > drivers/iio/pressure/bmp280-i2c.c | 6 ---
> > > > > drivers/iio/pressure/bmp280-spi.c | 6 ---
> > > > > drivers/iio/pressure/bmp280.h | 1 -
> > > > > 4 files changed, 30 insertions(+), 45 deletions(-)
> > > > >
> > > > > diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
> > > > > index c2988dbdb1a7..79254dd26dfd 100644
> > > > > --- a/drivers/iio/pressure/bmp280-core.c
> > > > > +++ b/drivers/iio/pressure/bmp280-core.c
> > > > > @@ -984,6 +984,22 @@ static int bmp085_fetch_eoc_irq(struct device *dev,
> > > > > return 0;
> > > > > }
> > > > >
> > > > > +static void bmp280_pm_disable(void *data)
> > > > > +{
> > > > > + struct device *dev = data;
> > > > > +
> > > > > + pm_runtime_get_sync(dev);
> > > > > + pm_runtime_put_noidle(dev);
> > > > > + pm_runtime_disable(dev);
> > > > > +}
> > > > > +
> > > > > +static void bmp280_regulators_disable(void *data)
> > > > > +{
> > > > > + struct regulator_bulk_data *supplies = data;
> > > > > +
> > > > > + regulator_bulk_disable(BMP280_NUM_SUPPLIES, supplies);
> > > > > +}
> > > > > +
> > > > > int bmp280_common_probe(struct device *dev,
> > > > > struct regmap *regmap,
> > > > > unsigned int chip,
> > > > > @@ -1055,6 +1071,11 @@ int bmp280_common_probe(struct device *dev,
> > > > > return ret;
> > > > > }
> > > > >
> > > > > + ret = devm_add_action_or_reset(dev, bmp280_regulators_disable,
> > > > > + data->supplies);
> > > > > + if (ret)
> > > > > + return ret;
> > > > > +
> > > > > /* Wait to make sure we started up properly */
> > > > > usleep_range(data->start_up_time, data->start_up_time + 100);
> > > > >
> > > > > @@ -1069,17 +1090,16 @@ int bmp280_common_probe(struct device *dev,
> > > > > data->regmap = regmap;
> > > > > ret = regmap_read(regmap, BMP280_REG_ID, &chip_id);
> > > > > if (ret < 0)
> > > > > - goto out_disable_regulators;
> > > > > + return ret;
> > > > > if (chip_id != chip) {
> > > > > dev_err(dev, "bad chip id: expected %x got %x\n",
> > > > > chip, chip_id);
> > > > > - ret = -EINVAL;
> > > > > - goto out_disable_regulators;
> > > > > + return -EINVAL;
> > > > > }
> > > > >
> > > > > ret = data->chip_info->chip_config(data);
> > > > > if (ret < 0)
> > > > > - goto out_disable_regulators;
> > > > > + return ret;
> > > > >
> > > > > dev_set_drvdata(dev, indio_dev);
> > > > >
> > > > > @@ -1093,14 +1113,14 @@ int bmp280_common_probe(struct device *dev,
> > > > > if (ret < 0) {
> > > > > dev_err(data->dev,
> > > > > "failed to read calibration coefficients\n");
> > > > > - goto out_disable_regulators;
> > > > > + return ret;
> > > > > }
> > > > > } else if (chip_id == BMP280_CHIP_ID || chip_id == BME280_CHIP_ID) {
> > > > > ret = bmp280_read_calib(data, &data->calib.bmp280, chip_id);
> > > > > if (ret < 0) {
> > > > > dev_err(data->dev,
> > > > > "failed to read calibration coefficients\n");
> > > > > - goto out_disable_regulators;
> > > > > + return ret;
> > > > > }
> > > > > }
> > > > >
> > > > > @@ -1112,7 +1132,7 @@ int bmp280_common_probe(struct device *dev,
> > > > > if (irq > 0 || (chip_id == BMP180_CHIP_ID)) {
> > > > > ret = bmp085_fetch_eoc_irq(dev, name, irq, data);
> > > > > if (ret)
> > > > > - goto out_disable_regulators;
> > > > > + return ret;
> > > > > }
> > > > >
> > > > > /* Enable runtime PM */
> > > > > @@ -1127,36 +1147,14 @@ int bmp280_common_probe(struct device *dev,
> > > > > pm_runtime_use_autosuspend(dev);
> > > > > pm_runtime_put(dev);
> > > > >
> > > > > - ret = iio_device_register(indio_dev);
> > > > > + ret = devm_add_action_or_reset(dev, bmp280_pm_disable, dev);
> > > > > if (ret)
> > > > > - goto out_runtime_pm_disable;
> > > > > -
> > > > > - return 0;
> > > > > + return ret;
> > > > >
> > > > > -out_runtime_pm_disable:
> > > > > - pm_runtime_get_sync(data->dev);
> > > > > - pm_runtime_put_noidle(data->dev);
> > > > > - pm_runtime_disable(data->dev);
> > > > > -out_disable_regulators:
> > > > > - regulator_bulk_disable(BMP280_NUM_SUPPLIES, data->supplies);
> > > > > - return ret;
> > > > > + return devm_iio_device_register(dev, indio_dev);
> > > > > }
> > > > > EXPORT_SYMBOL(bmp280_common_probe);
> > > > >
> > > > > -int bmp280_common_remove(struct device *dev)
> > > > > -{
> > > > > - struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > > > > - struct bmp280_data *data = iio_priv(indio_dev);
> > > > > -
> > > > > - iio_device_unregister(indio_dev);
> > > > > - pm_runtime_get_sync(data->dev);
> > > > > - pm_runtime_put_noidle(data->dev);
> > > > > - pm_runtime_disable(data->dev);
> > > > > - regulator_bulk_disable(BMP280_NUM_SUPPLIES, data->supplies);
> > > > > - return 0;
> > > > > -}
> > > > > -EXPORT_SYMBOL(bmp280_common_remove);
> > > > > -
> > > > > #ifdef CONFIG_PM
> > > > > static int bmp280_runtime_suspend(struct device *dev)
> > > > > {
> > > > > diff --git a/drivers/iio/pressure/bmp280-i2c.c b/drivers/iio/pressure/bmp280-i2c.c
> > > > > index acd9a3784fb4..3109c8e2cc11 100644
> > > > > --- a/drivers/iio/pressure/bmp280-i2c.c
> > > > > +++ b/drivers/iio/pressure/bmp280-i2c.c
> > > > > @@ -38,11 +38,6 @@ static int bmp280_i2c_probe(struct i2c_client *client,
> > > > > client->irq);
> > > > > }
> > > > >
> > > > > -static int bmp280_i2c_remove(struct i2c_client *client)
> > > > > -{
> > > > > - return bmp280_common_remove(&client->dev);
> > > > > -}
> > > > > -
> > > > > static const struct acpi_device_id bmp280_acpi_i2c_match[] = {
> > > > > {"BMP0280", BMP280_CHIP_ID },
> > > > > {"BMP0180", BMP180_CHIP_ID },
> > > > > @@ -82,7 +77,6 @@ static struct i2c_driver bmp280_i2c_driver = {
> > > > > .pm = &bmp280_dev_pm_ops,
> > > > > },
> > > > > .probe = bmp280_i2c_probe,
> > > > > - .remove = bmp280_i2c_remove,
> > > > > .id_table = bmp280_i2c_id,
> > > > > };
> > > > > module_i2c_driver(bmp280_i2c_driver);
> > > > > diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
> > > > > index 9d57b7a3b134..625b86878ad8 100644
> > > > > --- a/drivers/iio/pressure/bmp280-spi.c
> > > > > +++ b/drivers/iio/pressure/bmp280-spi.c
> > > > > @@ -86,11 +86,6 @@ static int bmp280_spi_probe(struct spi_device *spi)
> > > > > spi->irq);
> > > > > }
> > > > >
> > > > > -static int bmp280_spi_remove(struct spi_device *spi)
> > > > > -{
> > > > > - return bmp280_common_remove(&spi->dev);
> > > > > -}
> > > > > -
> > > > > static const struct of_device_id bmp280_of_spi_match[] = {
> > > > > { .compatible = "bosch,bmp085", },
> > > > > { .compatible = "bosch,bmp180", },
> > > > > @@ -118,7 +113,6 @@ static struct spi_driver bmp280_spi_driver = {
> > > > > },
> > > > > .id_table = bmp280_spi_id,
> > > > > .probe = bmp280_spi_probe,
> > > > > - .remove = bmp280_spi_remove,
> > > > > };
> > > > > module_spi_driver(bmp280_spi_driver);
> > > > >
> > > > > diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
> > > > > index eda50ef65706..57ba0e85db91 100644
> > > > > --- a/drivers/iio/pressure/bmp280.h
> > > > > +++ b/drivers/iio/pressure/bmp280.h
> > > > > @@ -112,7 +112,6 @@ int bmp280_common_probe(struct device *dev,
> > > > > unsigned int chip,
> > > > > const char *name,
> > > > > int irq);
> > > > > -int bmp280_common_remove(struct device *dev);
> > > > >
> > > > > /* PM ops */
> > > > > extern const struct dev_pm_ops bmp280_dev_pm_ops;
> > > >
> >
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