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| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2015-01-05 15:20:55 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2015-01-25 21:23:59 -0800 |
| commit | 8a5fc79513afe325fd755026299d0bfdb47e42de (patch) | |
| tree | 0e61597ce857a95050ecafc262a0902d47e49e99 /Documentation | |
| parent | e794704000cf7954039b8daab9dfae2a74142f07 (diff) | |
| download | linux-8a5fc79513afe325fd755026299d0bfdb47e42de.tar.gz linux-8a5fc79513afe325fd755026299d0bfdb47e42de.tar.bz2 linux-8a5fc79513afe325fd755026299d0bfdb47e42de.zip | |
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 <bgolaszewski@baylibre.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/hwmon/ina2xx | 5 |
1 files changed, 3 insertions, 2 deletions
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. |