On 10/01/2017 12:31 PM, Jonathan Cameron wrote:

On Thu, 28 Sep 2017 14:50:14 +0200
Maciej Purski [off-list ref] wrote:

quoted

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.

This is introducing new generic devicetree bindings..
I'm not totally sure we want to do this rather than having a
manufacturer specific binding...  I don't have a good feeling for
how common this will be in other devices.

If it's generic, then this isn't necessarily the place to define it.

Jonathan

I agree, this should be manufacturer-specific property. Thanks.

quoted

Signed-off-by: Maciej Purski <redacted>
---
  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 at 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