linux-kernel - RE: [PATCH 3/3] iio: magn: bmc150_magn: Add devicetree binding documentation

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Date:	Wed, 22 Apr 2015 12:47:08 +0000
From:	"Tirdea, Irina" <irina.tirdea@...el.com>
To:	Jonathan Cameron <jic23@...nel.org>,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Hartmut Knaack" <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	"Peter Meerwald" <pmeerw@...erw.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: RE: [PATCH 3/3] iio: magn: bmc150_magn: Add devicetree binding
 documentation



> -----Original Message-----
> From: linux-iio-owner@...r.kernel.org [mailto:linux-iio-owner@...r.kernel.org] On Behalf Of Jonathan Cameron
> Sent: 18 April, 2015 21:09
> To: Tirdea, Irina; linux-iio@...r.kernel.org; devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org; Hartmut Knaack; Lars-Peter Clausen; Peter Meerwald; Rob Herring; Pawel Moll; Mark Rutland; Ian
> Campbell; Kumar Gala
> Subject: Re: [PATCH 3/3] iio: magn: bmc150_magn: Add devicetree binding documentation
> 
> On 17/04/15 11:50, Irina Tirdea wrote:
> > Add binding documentation for Bosch BMC150 magnetometer.
> >
> > Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
> > ---
> >  .../bindings/iio/magnetometer/bmc150_magn.txt        | 20 ++++++++++++++++++++
> >  1 file changed, 20 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
> >
> > diff --git a/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
> b/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
> > new file mode 100644
> > index 0000000..4ed035c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/magnetometer/bmc150_magn.txt
> > @@ -0,0 +1,20 @@
> > +* Bosch BMC150 magnetometer sensor
> > +
> > +http://ae-bst.resource.bosch.com/media/products/dokumente/bmc150/BST-BMC150-DS000-04.pdf
> > +
> > +Required properties:
> > +
> > +  - compatible : should be "bosch,bmc150_magn"
> > +  - reg : the I2C address of the magnetometer
> > +
> > +Optional properties:
> > +
> > +  - gpios : should be device tree identifier of the magnetometer DRDY pin
> Hmm. Under device tree this should be done as an interrupt.  You only
> (currently) need the dubious frig with gpios for ACPI I think.
Using the gpios declared like this, it will go the same code path as the ACPI.
I wasn't sure which to list in the optional properties, so I used gpios because the other magnetometer device tree
bindings listed also gpios.

It is better to specify the interrupt directly since it will be handled by the core, so I will remove gpios and list interrupts
instead.

Thanks,
Irina

> > +
> > +Example:
> > +
> > +bmc150_magn@12 {
> > +        compatible = "bosch,bmc150_magn";
> > +        reg = <0x12>;
> > +        interrupt-gpio = <&gpio1 0 1>;
> > +};
> >
> 
> --
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