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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2015-01-05 15:20:55 +0100
committerGuenter Roeck <linux@roeck-us.net>2015-01-25 21:23:59 -0800
commit8a5fc79513afe325fd755026299d0bfdb47e42de (patch)
tree0e61597ce857a95050ecafc262a0902d47e49e99 /Documentation/hwmon
parente794704000cf7954039b8daab9dfae2a74142f07 (diff)
downloadkernel-8a5fc79513afe325fd755026299d0bfdb47e42de.tar.gz
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/hwmon')
-rw-r--r--Documentation/hwmon/ina2xx5
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.