On Sun, Feb 9, 2014 at 1:54 PM, Jonathan Cameron <jic23@xxxxxxxxxx> wrote:
> On 06/02/14 07:00, Matt Ranostay wrote:
>>
>> Document compatible string, required and optional DT properties for
>> AS3935 chipset driver.
>>
>> Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx>
>> ---
>> .../devicetree/bindings/iio/proximity/as3935.txt | 28
>> ++++++++++++++++++++++
>> .../devicetree/bindings/vendor-prefixes.txt | 1 +
>> 2 files changed, 29 insertions(+)
>> create mode 100644
>> Documentation/devicetree/bindings/iio/proximity/as3935.txt
>>
>> diff --git a/Documentation/devicetree/bindings/iio/proximity/as3935.txt
>> b/Documentation/devicetree/bindings/iio/proximity/as3935.txt
>> new file mode 100644
>> index 0000000..574d49c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/iio/proximity/as3935.txt
>> @@ -0,0 +1,28 @@
>> +Austrian Microsystems AS3935 Franklin lightning sensor device driver
>> +
>> +Required properties:
>> + - compatible: must be "ams,as3935"
>> + - reg: SPI chip select number for the device
>> + - spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI
>> + slave node bindings.
>> + - interrupt-parent : should be the phandle for the interrupt
>> controller
>> + - interrupts : interrupt mapping for GPIO IRQ
>
> Why does it need to be a GPIO IRQ? As far as I can see any irq will do
> (note there are devices that provide suitable interrupts without the ability
> to read the level). Oops, we have a couple of other IIO bindings stating
> exactly this. I doubt they need to be GPIOs either.
>
No it doesn't it can be any interrupt type... Will reword better
>
>> +
>> + Refer to interrupt-controller/interrupts.txt for generic
>> + interrupt client node bindings.
>> +
>> +Optional properties:
>> + - ams,tune-cap: Calibration tuning capacitor stepping value 0 -
>> 15.
>> + Range of 0 to 120 pF, 8pF steps. This will require using the
>> + calibration data from the manufacturer.
>
> Why not have this as the actual value rather than a magic number? Might
> as well keep the device tree as human readable as possible.
>
Makes sense.
>> +
>> +Example:
>> +
>> +as3935@0 {
>> + compatible = "ams,as3935";
>> + reg = <0>;
>> + spi-cpha;
>> + interrupt-parent = <&gpio1>;
>> + interrupts = <16 1>;
>> + ams,tune-cap = <10>;
>> +};
>> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt
>> b/Documentation/devicetree/bindings/vendor-prefixes.txt
>> index 3c31b40..9dd66ca 100644
>> --- a/Documentation/devicetree/bindings/vendor-prefixes.txt
>> +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
>> @@ -10,6 +10,7 @@ aeroflexgaisler Aeroflex Gaisler AB
>> ak Asahi Kasei Corp.
>> altr Altera Corp.
>> amcc Applied Micro Circuits Corporation (APM, formally AMCC)
>> +ams AMS AG
>> amstaos AMS-Taos Inc.
>> apm Applied Micro Circuits Corporation (APM)
>> arm ARM Ltd.
>>
>
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