6.6-stable review patch. If anyone has any objections, please let me know.
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From: Sean Nyekjaer sean@geanix.com
[ Upstream commit 0792c1984a45ccd7a296d6b8cb78088bc99a212e ]
Rework the power management in inv_icm42600_core_probe() to use devm_pm_runtime_set_active_enabled(), which simplifies the runtime PM setup by handling activation and enabling in one step. Remove the separate inv_icm42600_disable_pm callback, as it's no longer needed with the devm-managed approach. Using devm_pm_runtime_enable() also fixes the missing disable of autosuspend. Update inv_icm42600_disable_vddio_reg() to only disable the regulator if the device is not suspended i.e. powered-down, preventing unbalanced disables. Also remove redundant error msg on regulator_disable(), the regulator framework already emits an error message when regulator_disable() fails.
This simplifies the PM setup and avoids manipulating the usage counter unnecessarily.
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-v3-1-ef1336246960@geanix.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 24 ++++++----------------- 1 file changed, 7 insertions(+), 17 deletions(-)
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c @@ -567,20 +567,12 @@ static void inv_icm42600_disable_vdd_reg static void inv_icm42600_disable_vddio_reg(void *_data) { struct inv_icm42600_state *st = _data; - const struct device *dev = regmap_get_device(st->map); - int ret; - - ret = regulator_disable(st->vddio_supply); - if (ret) - dev_err(dev, "failed to disable vddio error %d\n", ret); -} + struct device *dev = regmap_get_device(st->map);
-static void inv_icm42600_disable_pm(void *_data) -{ - struct device *dev = _data; + if (pm_runtime_status_suspended(dev)) + return;
- pm_runtime_put_sync(dev); - pm_runtime_disable(dev); + regulator_disable(st->vddio_supply); }
int inv_icm42600_core_probe(struct regmap *regmap, int chip, int irq, @@ -677,16 +669,14 @@ int inv_icm42600_core_probe(struct regma return ret;
/* setup runtime power management */ - ret = pm_runtime_set_active(dev); + ret = devm_pm_runtime_set_active_enabled(dev); if (ret) return ret; - pm_runtime_get_noresume(dev); - pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, INV_ICM42600_SUSPEND_DELAY_MS); pm_runtime_use_autosuspend(dev); - pm_runtime_put(dev);
- return devm_add_action_or_reset(dev, inv_icm42600_disable_pm, dev); + return ret; } EXPORT_SYMBOL_NS_GPL(inv_icm42600_core_probe, IIO_ICM42600);