[PATCH v2 5/5] iio: adc: stm32-adc: Drop runtime_idle()

[Brian Norris]

This runtime_idle() implementation was added in commit c537d3457542 ("iio:
adc: stm32-adc: fix runtime autosuspend delay when slow polling"), to work
around a suboptimal behavior in the runtime PM core. It should no longer
be necessary as of "PM: runtime: Propagate last_busy from dependent to
dependency".

Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Tested-by: Fabrice Gasnier <fabrice.gasnier@xxxxxxxxxxx>
Acked-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>
---
I do not have these devices to test. I have tested other drivers, and I've
verified this behavior in unit tests as well.

(no changes since v1)

 drivers/iio/adc/stm32-adc-core.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index c409edd3a827..0193db7a2a7f 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -873,17 +873,10 @@ static int stm32_adc_core_runtime_resume(struct device *dev)
 	return stm32_adc_core_hw_start(dev);
 }
 
-static int stm32_adc_core_runtime_idle(struct device *dev)
-{
-	pm_runtime_mark_last_busy(dev);
-
-	return 0;
-}
-
 static DEFINE_RUNTIME_DEV_PM_OPS(stm32_adc_core_pm_ops,
 				stm32_adc_core_runtime_suspend,
 				stm32_adc_core_runtime_resume,
-				stm32_adc_core_runtime_idle);
+				NULL);
 
 static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = {
 	.regs = &stm32f4_adc_common_regs,
-- 
2.56.0.398.g882cbad275-goog