This is a note to let you know that I've just added the patch titled
iio: imu: inv_icm42600: Avoid configuring if already pm_runtime
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-testing 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 be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
From 466f7a2fef2a4e426f809f79845a1ec1aeb558f4 Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer sean@geanix.com Date: Mon, 1 Sep 2025 09:49:15 +0200 Subject: iio: imu: inv_icm42600: Avoid configuring if already pm_runtime suspended
Do as in suspend, skip resume configuration steps if the device is already pm_runtime suspended. This avoids reconfiguring a device that is already in the correct low-power state and ensures that pm_runtime handles the power state transitions properly.
Fixes: 31c24c1e93c3 ("iio: imu: inv_icm42600: add core of new inv_icm42600 driver") Signed-off-by: Sean Nyekjaer sean@geanix.com Link: https://patch.msgid.link/20250901-icm42pmreg-v3-3-ef1336246960@geanix.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c index 41b275ecc7e2..ee780f530dc8 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c @@ -837,17 +837,15 @@ static int inv_icm42600_suspend(struct device *dev) struct device *accel_dev; bool wakeup; int accel_conf; - int ret; + int ret = 0;
mutex_lock(&st->lock);
st->suspended.gyro = st->conf.gyro.mode; st->suspended.accel = st->conf.accel.mode; st->suspended.temp = st->conf.temp_en; - if (pm_runtime_suspended(dev)) { - ret = 0; + if (pm_runtime_suspended(dev)) goto out_unlock; - }
/* disable FIFO data streaming */ if (st->fifo.on) { @@ -900,10 +898,13 @@ static int inv_icm42600_resume(struct device *dev) struct inv_icm42600_sensor_state *accel_st = iio_priv(st->indio_accel); struct device *accel_dev; bool wakeup; - int ret; + int ret = 0;
mutex_lock(&st->lock);
+ if (pm_runtime_suspended(dev)) + goto out_unlock; + /* check wakeup capability */ accel_dev = &st->indio_accel->dev; wakeup = st->apex.on && device_may_wakeup(accel_dev);