On Tue, 30 Jun 2020 17:50:24 +0200
Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> wrote:
> Hi Gwendal,
>
> On 30/6/20 17:37, Gwendal Grignou wrote:
> > Minimal and maximal frequencies supported by a sensor is queried.
> > On some older machines, these frequencies are not returned properly and
> > the EC returns 0 instead.
> > When returned maximal frequency is 0, ignore the information and use
> > default frequencies instead.
> >
> > Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
>
> Reviewed-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Fix or tidy up? I.e. does this want to go into stable?
Thanks,
Jonathan
>
> > ---
> > Changes since v1:
> > - improve visibility by using new 100 character line length limit.
> >
> > .../cros_ec_sensors/cros_ec_sensors_core.c | 16 +++++++++++-----
> > 1 file changed, 11 insertions(+), 5 deletions(-)
> >
> > 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 36e3f20891f05..b30fd6b56773f 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
> > @@ -289,7 +289,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> > struct cros_ec_sensorhub *sensor_hub = dev_get_drvdata(dev->parent);
> > struct cros_ec_dev *ec = sensor_hub->ec;
> > struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
> > - u32 ver_mask;
> > + u32 ver_mask, temp;
> > int frequencies[ARRAY_SIZE(state->frequencies) / 2] = { 0 };
> > int ret, i;
> >
> > @@ -345,10 +345,16 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> > &frequencies[2],
> > &state->fifo_max_event_count);
> > } else {
> > - frequencies[1] = state->resp->info_3.min_frequency;
> > - frequencies[2] = state->resp->info_3.max_frequency;
> > - state->fifo_max_event_count =
> > - state->resp->info_3.fifo_max_event_count;
> > + if (state->resp->info_3.max_frequency == 0) {
> > + get_default_min_max_freq(state->resp->info.type,
> > + &frequencies[1],
> > + &frequencies[2],
> > + &temp);
> > + } else {
> > + frequencies[1] = state->resp->info_3.min_frequency;
> > + frequencies[2] = state->resp->info_3.max_frequency;
> > + }
> > + state->fifo_max_event_count = state->resp->info_3.fifo_max_event_count;
> > }
> > for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
> > state->frequencies[2 * i] = frequencies[i] / 1000;
> >
