mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-08 10:35:54 -04:00
Code Issues Packages Projects Releases Wiki Activity

iio: adc: rzg2l_adc: Enable runtime PM autosuspend support

Browse Source 
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@bp.renesas.com>
Reviewed-by: Lad 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: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Claudiu Beznea
2024-12-06 13:13:30 +02:00
committed by Jonathan Cameron
parent 5d7fb2d589
commit d7c3e34634
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/iio/adc/rzg2l_adc.c
View File

@@ -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;