On Fri, Dec 6, 2024 at 11:15 AM Claudiu <claudiu.beznea@xxxxxxxxx> wrote: > > From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> > > Enable runtime PM autosuspend support for the rzg2l_adc driver. With this > change, consecutive conversion requests will no longer cause the device to > be runtime-enabled/disabled after each request. Instead, the device will > transition based on the delay configured by the user. > > This approach reduces the frequency of hardware register access during > runtime PM suspend/resume cycles, thereby saving CPU cycles. > > Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> > --- > > Changes in v2: > - used a non-zero default autosusped delay > - adjusted the patch description to reflect that the default autosuspend > delay has been changed > > drivers/iio/adc/rzg2l_adc.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> Cheers, Prabhakar > diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c > index 953511191eac..c3f9f95cdbba 100644 > --- a/drivers/iio/adc/rzg2l_adc.c > +++ b/drivers/iio/adc/rzg2l_adc.c > @@ -208,7 +208,8 @@ static int rzg2l_adc_conversion(struct iio_dev *indio_dev, struct rzg2l_adc *adc > rzg2l_adc_start_stop(adc, false); > > rpm_put: > - pm_runtime_put_sync(dev); > + pm_runtime_mark_last_busy(dev); > + pm_runtime_put_autosuspend(dev); > return ret; > } > > @@ -372,7 +373,8 @@ static int rzg2l_adc_hw_init(struct device *dev, struct rzg2l_adc *adc) > rzg2l_adc_writel(adc, RZG2L_ADM(3), reg); > > exit_hw_init: > - pm_runtime_put_sync(dev); > + pm_runtime_mark_last_busy(dev); > + pm_runtime_put_autosuspend(dev); > return ret; > } > > @@ -410,6 +412,8 @@ static int rzg2l_adc_probe(struct platform_device *pdev) > "failed to get/deassert presetn\n"); > } > > + pm_runtime_set_autosuspend_delay(dev, 300); > + pm_runtime_use_autosuspend(dev); > ret = devm_pm_runtime_enable(dev); > if (ret) > return ret; > -- > 2.39.2 > >
