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Message-Id: <20230123064021.2657670-2-Naresh.Solanki@9elements.com>
Date: Mon, 23 Jan 2023 07:40:19 +0100
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Guenter Roeck <linux@...ck-us.net>,
Jean Delvare <jdelvare@...e.com>
Cc: linux-hwmon@...r.kernel.org,
Naresh Solanki <Naresh.Solanki@...ements.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] hwmon: (pmbus/core) Generalise pmbus get status
Add function pmbus get status that can be used to get both pmbus
specific status & regulator status
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
drivers/hwmon/pmbus/pmbus_core.c | 148 +++++++++++++++++--------------
1 file changed, 82 insertions(+), 66 deletions(-)
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 1b70cf3be313..12b662b91306 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2735,64 +2735,16 @@ 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)
+static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error)
{
- 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)
-{
- int i, status;
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 i2c_client *client = to_i2c_client(data->dev);
int func = data->info->func[page];
+ int i, status, ret;
- *flags = 0;
+ *error = 0;
mutex_lock(&data->update_lock);
@@ -2803,14 +2755,15 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
status = _pmbus_read_byte_data(client, page, cat->reg);
if (status < 0) {
- mutex_unlock(&data->update_lock);
- return status;
+ ret = status;
+ goto unlock;
}
for (bit = cat->bits; bit->pflag; bit++) {
if (status & bit->pflag)
- *flags |= bit->rflag;
+ *error |= bit->rflag;
}
+
}
/*
@@ -2823,36 +2776,99 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
* REGULATOR_ERROR_<foo>_WARN.
*/
status = pmbus_get_status(client, page, PMBUS_STATUS_WORD);
- mutex_unlock(&data->update_lock);
- if (status < 0)
- return status;
- if (pmbus_regulator_is_enabled(rdev)) {
+ if (status < 0) {
+ ret = status;
+ goto unlock;
+ }
+
+ ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
+ if (ret < 0)
+ goto unlock;
+
+ if (ret & PB_OPERATION_CONTROL_ON) {
if (status & PB_STATUS_OFF)
- *flags |= REGULATOR_ERROR_FAIL;
+ *error |= REGULATOR_ERROR_FAIL;
if (status & PB_STATUS_POWER_GOOD_N)
- *flags |= REGULATOR_ERROR_REGULATION_OUT;
+ *error |= REGULATOR_ERROR_REGULATION_OUT;
}
/*
* Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are
* defined strictly as fault indicators (not warnings).
*/
if (status & PB_STATUS_IOUT_OC)
- *flags |= REGULATOR_ERROR_OVER_CURRENT;
+ *error |= REGULATOR_ERROR_OVER_CURRENT;
if (status & PB_STATUS_VOUT_OV)
- *flags |= REGULATOR_ERROR_REGULATION_OUT;
+ *error |= REGULATOR_ERROR_REGULATION_OUT;
/*
* If we haven't discovered any thermal faults or warnings via
* PMBUS_STATUS_TEMPERATURE, map PB_STATUS_TEMPERATURE to a warning as
* a (conservative) best-effort interpretation.
*/
- if (!(*flags & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) &&
+ if (!(*error & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) &&
(status & PB_STATUS_TEMPERATURE))
- *flags |= REGULATOR_ERROR_OVER_TEMP_WARN;
+ *error |= REGULATOR_ERROR_OVER_TEMP_WARN;
- return 0;
+unlock:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+#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)
+{
+ 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)
--
2.38.1
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