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(-) 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
