From 8a5fc79513afe325fd755026299d0bfdb47e42de Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 5 Jan 2015 15:20:55 +0100 Subject: hwmon: (ina2xx) make shunt resistance configurable at run-time The shunt resistance can only be set via platform_data or device tree. This isn't suitable for devices in which the shunt resistance can change/isn't known at boot-time. Add a sysfs attribute that allows to read and set the shunt resistance. Signed-off-by: Bartosz Golaszewski Signed-off-by: Guenter Roeck --- Documentation/hwmon/ina2xx | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'Documentation/hwmon') diff --git a/Documentation/hwmon/ina2xx b/Documentation/hwmon/ina2xx index 4223c2d3b508..320dd69fb5e6 100644 --- a/Documentation/hwmon/ina2xx +++ b/Documentation/hwmon/ina2xx @@ -44,6 +44,7 @@ The INA226 monitors both a shunt voltage drop and bus supply voltage. The INA230 is a high or low side current shunt and power monitor with an I2C interface. The INA230 monitors both a shunt voltage drop and bus supply voltage. -The shunt value in micro-ohms can be set via platform data or device tree. -Please refer to the Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings +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. -- cgit