diff options
| -rw-r--r-- | Documentation/hwmon/lm25066.rst | 2 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/lm25066.c | 11 |
2 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm25066.rst b/Documentation/hwmon/lm25066.rst index 9f1d7e4d3ca1..a2098eb24090 100644 --- a/Documentation/hwmon/lm25066.rst +++ b/Documentation/hwmon/lm25066.rst @@ -79,6 +79,8 @@ This driver does not auto-detect devices. You will have to instantiate the devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for details. +The shunt (sense) resistor value can be configured by a device tree property; +see Documentation/devicetree/bindings/hwmon/pmbus/ti,lm25066.yaml for details. Platform data support --------------------- diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c index 7dc5ffeab77d..8402b41520eb 100644 --- a/drivers/hwmon/pmbus/lm25066.c +++ b/drivers/hwmon/pmbus/lm25066.c @@ -458,6 +458,7 @@ MODULE_DEVICE_TABLE(of, lm25066_of_match); static int lm25066_probe(struct i2c_client *client) { int config; + u32 shunt; struct lm25066_data *data; struct pmbus_driver_info *info; const struct __coeff *coeff; @@ -534,6 +535,16 @@ static int lm25066_probe(struct i2c_client *client) info->b[PSC_POWER] = coeff[PSC_POWER].b; } + /* + * Values in the TI datasheets are normalized for a 1mOhm sense + * resistor; assume that unless DT specifies a value explicitly. + */ + if (of_property_read_u32(client->dev.of_node, "shunt-resistor-micro-ohms", &shunt)) + shunt = 1000; + + info->m[PSC_CURRENT_IN] = info->m[PSC_CURRENT_IN] * shunt / 1000; + info->m[PSC_POWER] = info->m[PSC_POWER] * shunt / 1000; + return pmbus_do_probe(client, info); } |