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Message-Id: <20250901-icm42pmreg-v3-3-ef1336246960@geanix.com>
Date: Mon, 01 Sep 2025 09:49:15 +0200
From: Sean Nyekjaer <sean@...nix.com>
To: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@....com>,
rafael@...nel.org, Jonathan Cameron <jic23@...nel.org>,
David Lechner <dlechner@...libre.com>,
Nuno Sá <nuno.sa@...log.com>,
Andy Shevchenko <andy@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, Jean-Baptiste Maneyrol <jmaneyrol@...ensense.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Sean Nyekjaer <sean@...nix.com>
Subject: [PATCH v3 3/5] 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@...nix.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 41b275ecc7e25ea0b8cdf59be514cdf8a4957ab4..ee780f530dc8612cd25dc2216b153ef4e8c32b7b 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);
--
2.50.1
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