From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.purski@samsung.com (Maciej Purski) Date: Thu, 28 Sep 2017 14:50:14 +0200 Subject: [PATCH 3/4] dt-bindings: hwmon: Add max-expected-current property to ina2xx In-Reply-To: <1506603015-27202-1-git-send-email-m.purski@samsung.com> References: <1506603015-27202-1-git-send-email-m.purski@samsung.com> Message-ID: <1506603015-27202-4-git-send-email-m.purski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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 -- 2.7.4