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SubjectRe: [PATCH v2] iio: imu: inv_mpu6050: add debugfs register r/w interface
On Fri, 27 Mar 2020 15:19:01 +0200
Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:

> On Fri, Mar 27, 2020 at 06:40:23PM +0530, Rohit Sarkar wrote:
> > The debugfs interface provides direct access to read and write device
> > registers if debugfs is enabled.
> >
> > Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
> > ---
> > Changelog v1->v2
> > * grab a lock to protect driver state
> > * add a comma at the end of structure member initialisation
> >
> > drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 19 +++++++++++++++++++
> > 1 file changed, 19 insertions(+)
> >
> > diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> > index 7cb9ff3d3e94..381a3fb09858 100644
> > --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> > +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> > @@ -1248,12 +1248,31 @@ static const struct attribute_group inv_attribute_group = {
> > .attrs = inv_attributes
> > };
> >
> > +static int inv_mpu6050_reg_access(struct iio_dev *indio_dev,
> > + unsigned int reg,
> > + unsigned int writeval,
> > + unsigned int *readval)
> > +{
> > + struct inv_mpu6050_state *st = iio_priv(indio_dev);
>
> > + int ret = 0;
>
> Assignment is redundant, but I think maintainers may update this when applying.

Fixed up and applied to the togreg branch of iio.git and pushed
out as testing for the autobuilders to play with it.

Jonathan

>
> > +
> > + mutex_lock(&st->lock);
> > + if (readval)
> > + ret = regmap_read(st->map, reg, readval);
> > + else
> > + ret = regmap_write(st->map, reg, writeval);
> > + mutex_unlock(&st->lock);
> > +
> > + return ret;
> > +}
> > +
> > static const struct iio_info mpu_info = {
> > .read_raw = &inv_mpu6050_read_raw,
> > .write_raw = &inv_mpu6050_write_raw,
> > .write_raw_get_fmt = &inv_write_raw_get_fmt,
> > .attrs = &inv_attribute_group,
> > .validate_trigger = inv_mpu6050_validate_trigger,
> > + .debugfs_reg_access = &inv_mpu6050_reg_access,
> > };
> >
> > /**
> > --
> > 2.23.0.385.gbc12974a89
> >
>

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