Commit d7c3e346 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Jonathan Cameron
Browse files

iio: adc: rzg2l_adc: Enable runtime PM autosuspend support 



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: default avatarClaudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: default avatarLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20241206111337.726244-9-claudiu.beznea.uj@bp.renesas.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 5d7fb2d5

drivers/iio/adc/rzg2l_adc.c

+6 −2
Original line number Diff line number Diff line
@@ -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;

}
@@ -373,7 +374,8 @@ 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;

}
@@ -411,6 +413,8 @@ static int rzg2l_adc_probe(struct platform_device *pdev) 
		return dev_err_probe(dev, PTR_ERR(adc->presetn),

				     "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;