Re: [PATCH v7 12/12] iio: cros_ec: flush as hwfifo attribute

[Jonathan Cameron]

On Sat, 28 Mar 2020 10:14:23 +0100
Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> wrote:

> Hi Jonathan and Gwendal,
> 
> On 27/3/20 23:34, Gwendal Grignou wrote:
> > Add buffer/hwfifo_flush. It is not part of the ABI, but it follows ST
> > and HID lead: Tells the sensor hub to send to the host all pending
> > sensor events.
> > 
> > Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>  
> 
> I need an Ack from Jonathan to pick this.
> 
> Jonathan, once you are fine with it, do you mind if I take the full series
> through the platform chrome tree?

Once 12 is sorted (or if you want to take up to 11 thats fine) then
sure happy for you to take them.

Thanks,

Jonathan

> 
> Thanks,
>  Enric
> 
> 
> > ---
> > No changes in v7.
> > New in v6.
> > 
> >  .../cros_ec_sensors/cros_ec_sensors_core.c    | 28 +++++++++++++++++++
> >  1 file changed, 28 insertions(+)
> > 
> > diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > index c831915ca7e56..aaf124a82e0e4 100644
> > --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > @@ -113,6 +113,33 @@ static int cros_ec_sensor_set_ec_rate(struct cros_ec_sensors_core_state *st,
> >  	return ret;
> >  }
> >  
> > +static ssize_t cros_ec_sensors_flush(struct device *dev,
> > +				     struct device_attribute *attr,
> > +				     const char *buf, size_t len)
> > +{
> > +	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
> > +	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
> > +	int ret = 0;
> > +	bool flush;
> > +
> > +	ret = strtobool(buf, &flush);
> > +	if (ret < 0)
> > +		return ret;
> > +	if (!flush)
> > +		return -EINVAL;
> > +
> > +	mutex_lock(&st->cmd_lock);
> > +	st->param.cmd = MOTIONSENSE_CMD_FIFO_FLUSH;
> > +	ret = cros_ec_motion_send_host_cmd(st, 0);
> > +	if (ret != 0)
> > +		dev_warn(&indio_dev->dev, "Unable to flush sensor\n");
> > +	mutex_unlock(&st->cmd_lock);
> > +	return ret ? ret : len;
> > +}
> > +
> > +static IIO_DEVICE_ATTR(hwfifo_flush, 0644, NULL,
> > +		       cros_ec_sensors_flush, 0);
> > +
> >  static ssize_t cros_ec_sensor_set_report_latency(struct device *dev,
> >  						 struct device_attribute *attr,
> >  						 const char *buf, size_t len)
> > @@ -175,6 +202,7 @@ static ssize_t hwfifo_watermark_max_show(struct device *dev,
> >  static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
> >  
> >  const struct attribute *cros_ec_sensor_fifo_attributes[] = {
> > +	&iio_dev_attr_hwfifo_flush.dev_attr.attr,
> >  	&iio_dev_attr_hwfifo_timeout.dev_attr.attr,
> >  	&iio_dev_attr_hwfifo_watermark_max.dev_attr.attr,
> >  	NULL,
> >