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dt-bindings: iio: adc: max1027: Mark interrupts as optional

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The chips have a 'start conversion' and a 'end of conversion' pair of
pins. They can be used but this is absolutely not mandatory as regular
polling is supported by the chip depending on its internal clocking
setup.

There is no physical reason to force the use of interrupts so turn
them optional.

Also, once the interrupt turned optional, these devices fit perfectly
the "trivial devices" described in the generic (yaml) bindings file, so
instead of converting this text file to json schema, we can just add
the relevant compatibles in:
Documentation/devicetree/bindings/trivial-devices.yaml.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Miquel Raynal 2019-10-11 16:43:45 +02:00 committed by Jonathan Cameron
parent ae47d009b5
commit 1689387487
1 changed files with 2 additions and 0 deletions
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2
Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
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@ -3,6 +3,8 @@
Required properties:
- compatible: Should be "maxim,max1027" or "maxim,max1029" or "maxim,max1031"
- reg: SPI chip select number for the device
Optional properties:
- interrupts: IRQ line for the ADC
see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt