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hwmon: (pmbus) Add get_voltage/set_voltage ops 

The pmbus core does not have operations for getting or setting voltage.
Add functions get/set voltage for the dynamic regulator framework.

Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
Link: https://lore.kernel.org/r/20220503104631.3515715-5-marten.lindahl@axis.com
[groeck: cosmetic alignment / empty line fixes]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Mårten Lindahl 2022-05-03 12:46:31 +02:00 committed by Guenter Roeck
parent 3aa74796cf
commit 28bf22ef93
1 changed files with 67 additions and 0 deletions
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67
drivers/hwmon/pmbus/pmbus_core.c
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@ -2634,11 +2634,78 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
return 0;
}
static int pmbus_regulator_get_voltage(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);
struct pmbus_sensor s = {
.page = rdev_get_id(rdev),
.class = PSC_VOLTAGE_OUT,
.convert = true,
};
s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_READ_VOUT);
if (s.data < 0)
return s.data;
return (int)pmbus_reg2data(data, &s) * 1000; /* unit is uV */
}
static int pmbus_regulator_set_voltage(struct regulator_dev *rdev, int min_uv,
int max_uv, unsigned int *selector)
{
struct device *dev = rdev_get_dev(rdev);
struct i2c_client *client = to_i2c_client(dev->parent);
struct pmbus_data *data = i2c_get_clientdata(client);
struct pmbus_sensor s = {
.page = rdev_get_id(rdev),
.class = PSC_VOLTAGE_OUT,
.convert = true,
.data = -1,
};
int val = DIV_ROUND_CLOSEST(min_uv, 1000); /* convert to mV */
int low, high;
*selector = 0;
if (pmbus_check_word_register(client, s.page, PMBUS_MFR_VOUT_MIN))
s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_MFR_VOUT_MIN);
if (s.data < 0) {
s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_VOUT_MARGIN_LOW);
if (s.data < 0)
return s.data;
}
low = pmbus_reg2data(data, &s);
s.data = -1;
if (pmbus_check_word_register(client, s.page, PMBUS_MFR_VOUT_MAX))
s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_MFR_VOUT_MAX);
if (s.data < 0) {
s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_VOUT_MARGIN_HIGH);
if (s.data < 0)
return s.data;
}
high = pmbus_reg2data(data, &s);
/* Make sure we are within margins */
if (low > val)
val = low;
if (high < val)
val = high;
val = pmbus_data2reg(data, &s, val);
return _pmbus_write_word_data(client, s.page, PMBUS_VOUT_COMMAND, (u16)val);
}
const struct regulator_ops pmbus_regulator_ops = {
.enable = pmbus_regulator_enable,
.disable = pmbus_regulator_disable,
.is_enabled = pmbus_regulator_is_enabled,
.get_error_flags = pmbus_regulator_get_error_flags,
.get_voltage = pmbus_regulator_get_voltage,
.set_voltage = pmbus_regulator_set_voltage,
};
EXPORT_SYMBOL_NS_GPL(pmbus_regulator_ops, PMBUS);