This driver does not have regulator specific operations for getting or
setting voltage. Add functions get/set voltage for the dynamic regulator
framework.
Signed-off-by: Mårten Lindahl <marten.lindahl@xxxxxxxx>
---
drivers/hwmon/pmbus/ltc2978.c | 55 +++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index 822edec33ba7..fce08c33e66a 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -596,10 +596,65 @@ static int ltc2978_regulator_disable(struct regulator_dev *rdev)
return ltc2978_regulator_on_off(rdev, 0);
}
+static int ltc2978_regulator_get_voltage(struct regulator_dev *rdev)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ u8 page = rdev_get_id(rdev);
+ int ret;
+
+ ret = ltc_wait_ready(client);
+ if (ret < 0)
+ return ret;
+
+ ret = pmbus_read_word_data(client, page, 0xff, PMBUS_READ_VOUT);
+ if (ret < 0)
+ return ret;
+
+ ret *= 1000;
+
+ return ((ret >> 13) * 1000);
+}
+
+static int ltc2978_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);
+ u8 page = rdev_get_id(rdev);
+ long tmp = DIV_ROUND_CLOSEST(min_uV, 1000);
+ u32 val = DIV_ROUND_CLOSEST(tmp << 13, 1000);
+ int ret;
+ *selector = 0;
+
+ ret = ltc_wait_ready(client);
+ if (ret < 0)
+ return ret;
+
+ ret = pmbus_read_word_data(client, page, 0xff, PMBUS_VOUT_MARGIN_LOW);
+ if (ret < 0)
+ return ret;
+
+ /* Select the voltage closest to min_uV */
+ if (ret > val)
+ val = ret;
+
+ ret = ltc_wait_ready(client);
+ if (ret < 0)
+ return ret;
+
+ ret = pmbus_write_word_data(client, page, PMBUS_VOUT_COMMAND,
+ (u16)val);
+
+ return ret;
+}
+
static const struct regulator_ops ltc2978_regulator_ops = {
.enable = ltc2978_regulator_enable,
.disable = ltc2978_regulator_disable,
.is_enabled = ltc2978_regulator_is_enabled,
+ .get_voltage = ltc2978_regulator_get_voltage,
+ .set_voltage = ltc2978_regulator_set_voltage,
};
/* Macro for filling in array of struct regulator_desc */
--
2.30.2
