[PATCH v7 1/4] hwmon: (pmbus/core) export pmbus_check_and_notify_faults()

[Vincent Jardin via B4 Relay <devnull+vjardin.free.fr@kernel.org>]

From: Vincent Jardin <vjardin@free.fr>

Factor of pmbus_fault_handler() into an exported helper so
drivers can notify sequence from a polling work item on boards
for which the chip's SMBALERT# pin is not wired to the
CPU. The interrupt handler becomes a thin wrapper.

Like the SMBALERT# path, the helper notifies and then clears the
latched faults unconditionally, so a polling caller inherits exactly
the interrupt semantics.

Signed-off-by: Vincent Jardin <vjardin@free.fr>
---
 drivers/hwmon/pmbus/pmbus.h      |  1 +
 drivers/hwmon/pmbus/pmbus_core.c | 14 +++++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 23e3eda58870..1504d8b9e34c 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -560,6 +560,7 @@ int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg,
 int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
 			   u8 mask, u8 value);
 void pmbus_clear_faults(struct i2c_client *client);
+void pmbus_check_and_notify_faults(struct i2c_client *client);
 bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
 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);
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 3143b9e0316c..c52052b30bc8 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -3437,10 +3437,9 @@ static int pmbus_write_smbalert_mask(struct i2c_client *client, u8 page, u8 reg,
 	return ret;
 }
 
-static irqreturn_t pmbus_fault_handler(int irq, void *pdata)
+void pmbus_check_and_notify_faults(struct i2c_client *client)
 {
-	struct pmbus_data *data = pdata;
-	struct i2c_client *client = to_i2c_client(data->dev);
+	struct pmbus_data *data = i2c_get_clientdata(client);
 	int i, status, event;
 
 	guard(pmbus_lock)(client);
@@ -3453,6 +3452,15 @@ static irqreturn_t pmbus_fault_handler(int irq, void *pdata)
 	}
 
 	pmbus_clear_faults(client);
+}
+EXPORT_SYMBOL_NS_GPL(pmbus_check_and_notify_faults, "PMBUS");
+
+static irqreturn_t pmbus_fault_handler(int irq, void *pdata)
+{
+	struct pmbus_data *data = pdata;
+	struct i2c_client *client = to_i2c_client(data->dev);
+
+	pmbus_check_and_notify_faults(client);
 
 	return IRQ_HANDLED;
 }

-- 
2.43.0