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SubjectRe: [PATCH] iio: magnetometer: Add support for PNI RM3100 9-axis magnetometer
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On 20/09/2018 9:13 PM, Song Qiang wrote:
> PNI RM3100 magnetometer is a high resolution, large signal immunity
> magnetometer, composed of 3 single sensors and a processing chip.
> PNI is currently not in the vendors list, so this is also adding it.
>

In the subject: Isn't the RM3100 a 3axis mag.
The 9axis bit comes when you combine it with an accel / gryo I think.

... snip

> +++ b/Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.txt
> @@ -0,0 +1,57 @@
> +* PNI RM3100 9-axis magnetometer sensor
> +
> +I2C Bus:
> +
> +Required properties:
> +
> +- compatible : should be "pni,rm3100-i2c"
> +- reg : the I2C address of the magnetometer
> +

... snip

> +SPI Bus:
> +
> +Required properties:
> +
> +- compatible : should be "pni,rm3100-spi"
> +- reg : address of sensor, usually 0 or 1.
> +

Looking at other drivers supporting i2c / spi.
They use the same compatible for both.

eg: see iio/accel/adxl345_*.c

and it's binding doc:

Required properties:
- compatible : should be "adi,adxl345"
- reg : the I2C address or SPI chip select number of the sensor

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