mirror of
https://github.com/torvalds/linux.git
synced 2026-04-25 10:02:31 -04:00
eb35279dd7
Most applications are too noisy to allow the default noise and watchdog settings, and thus need to be configurable via DT properties. Also default settings to POR defaults on a reset, and register distuber interrupts as noise since it prevents proper usage. Cc: devicetree@vger.kernel.org Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
Austrian Microsystems AS3935 Franklin lightning sensor device driver
|
|
|
|
Required properties:
|
|
- compatible: must be "ams,as3935"
|
|
- reg: SPI chip select number for the device
|
|
- spi-max-frequency: specifies maximum SPI clock frequency
|
|
- 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 : the sole interrupt generated by the device
|
|
|
|
Refer to interrupt-controller/interrupts.txt for generic
|
|
interrupt client node bindings.
|
|
|
|
Optional properties:
|
|
- ams,tuning-capacitor-pf: Calibration tuning capacitor stepping
|
|
value 0 - 120pF. This will require using the calibration data from
|
|
the manufacturer.
|
|
- ams,nflwdth: Set the noise and watchdog threshold register on
|
|
startup. This will need to set according to the noise from the
|
|
MCU board, and possibly the local environment. Refer to the
|
|
datasheet for the threshold settings.
|
|
|
|
Example:
|
|
|
|
as3935@0 {
|
|
compatible = "ams,as3935";
|
|
reg = <0>;
|
|
spi-max-frequency = <400000>;
|
|
spi-cpha;
|
|
interrupt-parent = <&gpio1>;
|
|
interrupts = <16 1>;
|
|
ams,tuning-capacitor-pf = <80>;
|
|
ams,nflwdth = <0x44>;
|
|
};
|