[PATCH v3 1/3] hwmon: pmbus: event notification with alarms
Vincent Jardin via B4 Relay <[email protected]>
| Newsgroups | org.kernel.vger.linux-hwmon,org.kernel.feeds.b4-sent,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
From: Vincent Jardin <[email protected]> Let's add an accessor for the hwmon class device the pmbus core registered for an i2c_client. Export it with PMBUS so chip drivers can call hwmon_notify_event() on per-sensor *_alarm attributes from the driver's work items. The needs: for boards when the chip's SMBALERT# pin is not available for the CPU, pmbus_irq_setup() cannot deliver poll(POLLPRI) wakes or udev change@... events on the inX_alarm files. So the drivers can install a delayed_work-based polling fallback (like the lm90 driver) that periodically reads STATUS_WORD and calls hwmon_notify_event() on 0->1 transitions. Signed-off-by: Vincent Jardin <[email protected]> --- drivers/hwmon/pmbus/pmbus.h | 1 + drivers/hwmon/pmbus/pmbus_core.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index 23e3eda58870..46ab056c0058 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -565,6 +565,7 @@ bool pmbus_check_word_register(struct i2c_client *client, int page, int reg); int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info); const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client); +struct device *pmbus_get_hwmon_device(struct i2c_client *client); int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id, enum pmbus_fan_mode mode); int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id, diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 3143b9e0316c..6ba00ad73297 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -695,6 +695,14 @@ const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) } EXPORT_SYMBOL_NS_GPL(pmbus_get_driver_info, "PMBUS"); +struct device *pmbus_get_hwmon_device(struct i2c_client *client) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + + return data->hwmon_dev; +} +EXPORT_SYMBOL_NS_GPL(pmbus_get_hwmon_device, "PMBUS"); + static int pmbus_get_status(struct i2c_client *client, int page, int reg) { struct pmbus_data *data = i2c_get_clientdata(client); -- 2.43.0