Add optional max expected current property which allows calibrating
the ina sensor in order to achieve requested precision. Document
the changes in Documentation/hwmon/ina2xx.
Signed-off-by: Maciej Purski <m.purski@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/hwmon/ina2xx.txt | 4 +++-
Documentation/hwmon/ina2xx | 9 +++++----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/hwmon/ina2xx.txt b/Documentation/devicetree/bindings/hwmon/ina2xx.txt
index 02af0d9..25ba372 100644
--- a/Documentation/devicetree/bindings/hwmon/ina2xx.txt
+++ b/Documentation/devicetree/bindings/hwmon/ina2xx.txt
@@ -14,11 +14,13 @@ Optional properties:
- shunt-resistor
Shunt resistor value in micro-Ohm
-
+- max-expected-current
+ Max expected current value in mA
Example:
ina220@44 {
compatible = "ti,ina220";
reg = <0x44>;
shunt-resistor = <1000>;
+ max-expected-current = <3000>;
};
diff --git a/Documentation/hwmon/ina2xx b/Documentation/hwmon/ina2xx
index cfd31d9..e9ca838 100644
--- a/Documentation/hwmon/ina2xx
+++ b/Documentation/hwmon/ina2xx
@@ -51,10 +51,11 @@ INA230 and INA231 are high or low side current shunt and power monitors
with an I2C interface. The chips monitor both a shunt voltage drop and
bus supply voltage.
-The shunt value in micro-ohms can be set via platform data or device tree at
-compile-time or via the shunt_resistor attribute in sysfs at run-time. Please
-refer to the Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings
-if the device tree is used.
+The shunt value in micro-ohms and max expected current in mA can be set
+via platform data or device tree at compile-time or via the shunt_resistor
+and max_expected_current attributes in sysfs at run-time. Please refer to the
+Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings if the
+device tree is used.
Additionally ina226 supports update_interval attribute as described in
Documentation/hwmon/sysfs-interface. Internally the interval is the sum of
--
2.7.4
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