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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>
This commit is contained in:
Mårten Lindahl 2022-06-14 11:38:55 +02:00 committed by Guenter Roeck
parent 07fb76273d
commit 2a20db9bfc
1 changed files with 30 additions and 0 deletions
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30
drivers/hwmon/pmbus/pmbus_core.c
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@ -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);