This is a note to let you know that I've just added the patch titled
iio: adc: rzg2l: Cleanup suspend/resume path
to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From a3c6eabe3bbd6b0e7124d68b2d3bc32fed17362e Mon Sep 17 00:00:00 2001 From: Claudiu Beznea claudiu.beznea.uj@bp.renesas.com Date: Sun, 10 Aug 2025 15:33:27 +0300 Subject: iio: adc: rzg2l: Cleanup suspend/resume path
There is no need to manually track the runtime PM status in the driver. The pm_runtime_force_suspend() and pm_runtime_force_resume() functions already call pm_runtime_status_suspended() to check the runtime PM state.
Additionally, avoid calling pm_runtime_put_autosuspend() during the suspend/resume path, as this would decrease the usage counter of a potential user that had the ADC open before the suspend/resume cycle.
Fixes: 563cf94f9329 ("iio: adc: rzg2l_adc: Add suspend/resume support") Reviewed-by: Ulf Hansson ulf.hansson@linaro.org Reviewed-by: Lad Prabhakar prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Claudiu Beznea claudiu.beznea.uj@bp.renesas.com Link: https://patch.msgid.link/20250810123328.800104-2-claudiu.beznea.uj@bp.renesa... Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- drivers/iio/adc/rzg2l_adc.c | 29 ++++++++--------------------- 1 file changed, 8 insertions(+), 21 deletions(-)
diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c index 9674d48074c9..0cb5a67fd497 100644 --- a/drivers/iio/adc/rzg2l_adc.c +++ b/drivers/iio/adc/rzg2l_adc.c @@ -89,7 +89,6 @@ struct rzg2l_adc { struct completion completion; struct mutex lock; u16 last_val[RZG2L_ADC_MAX_CHANNELS]; - bool was_rpm_active; };
/** @@ -541,14 +540,9 @@ static int rzg2l_adc_suspend(struct device *dev) }; int ret;
- if (pm_runtime_suspended(dev)) { - adc->was_rpm_active = false; - } else { - ret = pm_runtime_force_suspend(dev); - if (ret) - return ret; - adc->was_rpm_active = true; - } + ret = pm_runtime_force_suspend(dev); + if (ret) + return ret;
ret = reset_control_bulk_assert(ARRAY_SIZE(resets), resets); if (ret) @@ -557,9 +551,7 @@ static int rzg2l_adc_suspend(struct device *dev) return 0;
rpm_restore: - if (adc->was_rpm_active) - pm_runtime_force_resume(dev); - + pm_runtime_force_resume(dev); return ret; }
@@ -577,11 +569,9 @@ static int rzg2l_adc_resume(struct device *dev) if (ret) return ret;
- if (adc->was_rpm_active) { - ret = pm_runtime_force_resume(dev); - if (ret) - goto resets_restore; - } + ret = pm_runtime_force_resume(dev); + if (ret) + goto resets_restore;
ret = rzg2l_adc_hw_init(dev, adc); if (ret) @@ -590,10 +580,7 @@ static int rzg2l_adc_resume(struct device *dev) return 0;
rpm_restore: - if (adc->was_rpm_active) { - pm_runtime_mark_last_busy(dev); - pm_runtime_put_autosuspend(dev); - } + pm_runtime_force_suspend(dev); resets_restore: reset_control_bulk_assert(ARRAY_SIZE(resets), resets); return ret;