diff options
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/ina2xx.txt | 22 | ||||
| -rw-r--r-- | Documentation/hwmon/ina2xx | 4 | ||||
| -rw-r--r-- | drivers/hwmon/ina2xx.c | 5 |
3 files changed, 30 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/i2c/ina2xx.txt b/Documentation/devicetree/bindings/i2c/ina2xx.txt new file mode 100644 index 0000000..a2ad85d --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/ina2xx.txt @@ -0,0 +1,22 @@ +ina2xx properties + +Required properties: +- compatible: Must be one of the following: + - "ti,ina219" for ina219 + - "ti,ina220" for ina220 + - "ti,ina226" for ina226 + - "ti,ina230" for ina230 +- reg: I2C address + +Optional properties: + +- shunt-resistor + Shunt resistor value in micro-Ohm + +Example: + +ina220@44 { + compatible = "ti,ina220"; + reg = <0x44>; + shunt-resistor = <1000>; +}; diff --git a/Documentation/hwmon/ina2xx b/Documentation/hwmon/ina2xx index 03444f9..4223c2d 100644 --- a/Documentation/hwmon/ina2xx +++ b/Documentation/hwmon/ina2xx @@ -44,4 +44,6 @@ 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. +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 +if the device tree is used. diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c index 4958b2f..d917a2d 100644 --- a/drivers/hwmon/ina2xx.c +++ b/drivers/hwmon/ina2xx.c @@ -34,6 +34,7 @@ #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> +#include <linux/of.h> #include <linux/platform_data/ina2xx.h> @@ -221,6 +222,7 @@ static int ina2xx_probe(struct i2c_client *client, struct ina2xx_data *data; struct ina2xx_platform_data *pdata; int ret; + u32 val; long shunt = 10000; /* default shunt value 10mOhms */ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) @@ -234,6 +236,9 @@ static int ina2xx_probe(struct i2c_client *client, pdata = (struct ina2xx_platform_data *)client->dev.platform_data; shunt = pdata->shunt_uohms; + } else if (!of_property_read_u32(client->dev.of_node, + "shunt-resistor", &val)) { + shunt = val; } if (shunt <= 0) |