Re: [PATCH v2 2/4] hwmon: (pmbus/core) Generalise pmbus get status

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Hi

On 11-02-2023 08:37 pm, Guenter Roeck wrote:
On Tue, Feb 07, 2023 at 01:02:39PM +0100, Naresh Solanki wrote:
Add function pmbus get status that can be used to get both pmbus
specific status & regulator status

Signed-off-by: Naresh Solanki <Naresh.Solanki@xxxxxxxxxxxxx>
...
Changes in V2:
- Add __maybe_unused attribute for pmbus_get_status function
- Remove unrelated changes
---
  drivers/hwmon/pmbus/pmbus_core.c | 118 +++++++++++++++++--------------
  1 file changed, 66 insertions(+), 52 deletions(-)

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 1b70cf3be313..5ccae8126a56 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2735,61 +2735,14 @@ static const struct pmbus_status_category __maybe_unused pmbus_status_flag_map[]
  	},
  };
-#if IS_ENABLED(CONFIG_REGULATOR)
-static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
-{
-	struct device *dev = rdev_get_dev(rdev);
-	struct i2c_client *client = to_i2c_client(dev->parent);
-	struct pmbus_data *data = i2c_get_clientdata(client);
-	u8 page = rdev_get_id(rdev);
-	int ret;
-
-	mutex_lock(&data->update_lock);
-	ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
-	mutex_unlock(&data->update_lock);
-
-	if (ret < 0)
-		return ret;
-
-	return !!(ret & PB_OPERATION_CONTROL_ON);
-}
-
-static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
-{
-	struct device *dev = rdev_get_dev(rdev);
-	struct i2c_client *client = to_i2c_client(dev->parent);
-	struct pmbus_data *data = i2c_get_clientdata(client);
-	u8 page = rdev_get_id(rdev);
-	int ret;
-
-	mutex_lock(&data->update_lock);
-	ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
-				     PB_OPERATION_CONTROL_ON,
-				     enable ? PB_OPERATION_CONTROL_ON : 0);
-	mutex_unlock(&data->update_lock);
-
-	return ret;
-}
-
-static int pmbus_regulator_enable(struct regulator_dev *rdev)
-{
-	return _pmbus_regulator_on_off(rdev, 1);
-}
-
-static int pmbus_regulator_disable(struct regulator_dev *rdev)
-{
-	return _pmbus_regulator_on_off(rdev, 0);
-}
-static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
+static int __maybe_unused pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *flags)
  {
-	int i, status;
+	int i, status, ret;
  	const struct pmbus_status_category *cat;
  	const struct pmbus_status_assoc *bit;
-	struct device *dev = rdev_get_dev(rdev);
-	struct i2c_client *client = to_i2c_client(dev->parent);
-	struct pmbus_data *data = i2c_get_clientdata(client);
-	u8 page = rdev_get_id(rdev);
+	struct device *dev = data->dev;
+	struct i2c_client *client = to_i2c_client(dev);
  	int func = data->info->func[page];
*flags = 0;
@@ -2827,7 +2780,13 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
  	if (status < 0)
  		return status;
- if (pmbus_regulator_is_enabled(rdev)) {
+	mutex_lock(&data->update_lock);
+	ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
+	mutex_unlock(&data->update_lock);
+	if (ret < 0)
+		return status;
+
+	if (ret & PB_OPERATION_CONTROL_ON) {

This code is now executed twice. Please keep the original function,
just rename it to pmbus_is_enabled() or similar, then call it from
pmbus_regulator_is_enabled() which then just needs to adjust the
parameter (and maybe pass 'dev' as argument).

Sure
  		if (status & PB_STATUS_OFF)
  			*flags |= REGULATOR_ERROR_FAIL;
@@ -2855,6 +2814,61 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
  	return 0;
  }
+#if IS_ENABLED(CONFIG_REGULATOR)
+static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
+{
+	struct device *dev = rdev_get_dev(rdev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
+	struct pmbus_data *data = i2c_get_clientdata(client);
+	u8 page = rdev_get_id(rdev);
+	int ret;
+
+	mutex_lock(&data->update_lock);
+	ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
+	mutex_unlock(&data->update_lock);
+
+	if (ret < 0)
+		return ret;
+
+	return !!(ret & PB_OPERATION_CONTROL_ON);

This could then be as simple as

	return pmbus_is_enabled(rdev_get_dev(rdev));

Sure
Thanks,
Guenter

+}
+
+static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
+{
+	struct device *dev = rdev_get_dev(rdev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
+	struct pmbus_data *data = i2c_get_clientdata(client);
+	u8 page = rdev_get_id(rdev);
+	int ret;
+
+	mutex_lock(&data->update_lock);
+	ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
+				     PB_OPERATION_CONTROL_ON,
+				     enable ? PB_OPERATION_CONTROL_ON : 0);
+	mutex_unlock(&data->update_lock);
+
+	return ret;
+}
+
+static int pmbus_regulator_enable(struct regulator_dev *rdev)
+{
+	return _pmbus_regulator_on_off(rdev, 1);
+}
+
+static int pmbus_regulator_disable(struct regulator_dev *rdev)
+{
+	return _pmbus_regulator_on_off(rdev, 0);
+}
+
+static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
+{
+	struct device *dev = rdev_get_dev(rdev);
+	struct i2c_client *client = to_i2c_client(dev->parent);
+	struct pmbus_data *data = i2c_get_clientdata(client);
+
+	return pmbus_get_flags(data, rdev_get_id(rdev), flags);
+}
+
  static int pmbus_regulator_get_status(struct regulator_dev *rdev)
  {
  	struct device *dev = rdev_get_dev(rdev);



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