diff options
| author | Mårten Lindahl <marten.lindahl@axis.com> | 2022-06-14 11:38:55 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-07-13 08:38:20 -0700 |
| commit | 2a20db9bfc42b71fa311ace70265ba16f5a3ab80 (patch) | |
| tree | 03138a92f2f7e31800237beb0fdce3da63f4a557 /drivers/hwmon | |
| parent | 07fb76273db89d9340fa1fea2997d73fa3768ab9 (diff) | |
| download | lwn-2a20db9bfc42b71fa311ace70265ba16f5a3ab80.tar.gz lwn-2a20db9bfc42b71fa311ace70265ba16f5a3ab80.zip | |
hwmon: (pmbus) Add list_voltage to pmbus ops
When checking if a regulator supports a voltage range, the regulator
needs to have a list_voltage callback set to the regulator_ops or else
-EINVAL will be returned. This support does not exist for the pmbus
regulators, so this patch adds pmbus_regulator_list_voltage to the
pmbus_regulator_ops.
Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
Link: https://lore.kernel.org/r/20220614093856.3470672-3-marten.lindahl@axis.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 8c6f44988ba5..f10bac8860fc 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -2957,6 +2957,35 @@ static int pmbus_regulator_set_voltage(struct regulator_dev *rdev, int min_uv, return _pmbus_write_word_data(client, s.page, PMBUS_VOUT_COMMAND, (u16)val); } +static int pmbus_regulator_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + int val, low, high; + + if (selector >= rdev->desc->n_voltages || + selector < rdev->desc->linear_min_sel) + return -EINVAL; + + selector -= rdev->desc->linear_min_sel; + val = DIV_ROUND_CLOSEST(rdev->desc->min_uV + + (rdev->desc->uV_step * selector), 1000); /* convert to mV */ + + low = pmbus_regulator_get_low_margin(client, rdev_get_id(rdev)); + if (low < 0) + return low; + + high = pmbus_regulator_get_high_margin(client, rdev_get_id(rdev)); + if (high < 0) + return high; + + if (val >= low && val <= high) + return val * 1000; /* unit is uV */ + + return 0; +} + const struct regulator_ops pmbus_regulator_ops = { .enable = pmbus_regulator_enable, .disable = pmbus_regulator_disable, @@ -2964,6 +2993,7 @@ const struct regulator_ops pmbus_regulator_ops = { .get_error_flags = pmbus_regulator_get_error_flags, .get_voltage = pmbus_regulator_get_voltage, .set_voltage = pmbus_regulator_set_voltage, + .list_voltage = pmbus_regulator_list_voltage, }; EXPORT_SYMBOL_NS_GPL(pmbus_regulator_ops, PMBUS); |