On Mon, 2020-03-02 at 16:22 -0600, Rob Herring wrote: > On Tue, Feb 25, 2020 at 01:41:52PM +0100, Nuno Sá wrote: > > Document the ADIS16475 device devicetree bindings. > > > > Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx> > > --- > > .../bindings/iio/imu/adi,adis16475.yaml | 130 > > ++++++++++++++++++ > > MAINTAINERS | 1 + > > 2 files changed, 131 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml > > > > diff --git > > a/Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml > > b/Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml > > new file mode 100644 > > index 000000000000..c0f2146e000c > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml > > @@ -0,0 +1,130 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/iio/imu/adi,adis16475.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Analog Devices ADIS16475 and similar IMUs > > + > > +maintainers: > > + - Nuno Sá <nuno.sa@xxxxxxxxxx> > > + > > +description: | > > + Analog Devices ADIS16475 and similar IMUs > > + > > https://www.analog.com/media/en/technical-documentation/data-sheets/ADIS16475.pdf > > + > > +properties: > > + compatible: > > + enum: > > + - adi,adis16475-1 > > + - adi,adis16475-2 > > + - adi,adis16475-3 > > + - adi,adis16477-1 > > + - adi,adis16477-2 > > + - adi,adis16477-3 > > + - adi,adis16470 > > + - adi,adis16465-1 > > + - adi,adis16465-2 > > + - adi,adis16465-3 > > + - adi,adis16467-1 > > + - adi,adis16467-2 > > + - adi,adis16467-3 > > + - adi,adis16500 > > + - adi,adis16505-1 > > + - adi,adis16505-2 > > + - adi,adis16505-3 > > + - adi,adis16507-1 > > + - adi,adis16507-2 > > + - adi,adis16507-3 > > + > > + reg: > > + maxItems: 1 > > + > > + spi-cpha: true > > + > > + spi-cpol: true > > + > > + spi-max-frequency: > > + maximum: 2000000 > > + > > + interrupts: > > + maxItems: 1 > > + > > + clocks: > > + maxItems: 1 > > + > > + clock-names: > > + oneOf: > > + - const: sync > > + - const: direct-sync > > + - const: pulse-sync > > + - const: scaled-sync > > According to the datasheet I looked at, the input is called 'sync'. > It > looks like you are mixing operating mode and clock connection. The sync pin is where the external clock should be connected (when available). I'm kinda of using the clock-name property as a way of selecting the mode the user wants to use as done in other devices ( https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/iio/imu/adi,adis16480.txt ). In the end, what we should have in the sync pin is an external clock with the exception of the `sync` mode. I guess this one could be called output-sync and, in this case, the sync pin is actually an output pin pulsing when the internal processor collects data. I'm ok in changing it if there's a better way of doing it... Do you have any suggestion? -Nuno Sá > > + > > + reset-gpios: > > + description: > > + Must be the device tree identifier of the RESET pin. If > > specified, > > + it will be asserted during driver probe. As the line is > > active low, > > + it should be marked GPIO_ACTIVE_LOW. > > + maxItems: 1 > > + > > + adi,scaled-output-hz: > > + description: > > + This property must be present if the clock mode is scaled- > > sync through > > + clock-names property. In this mode, the input clock can have > > a range > > + of 1Hz to 128HZ which must be scaled to originate an > > allowable sample > > + rate. This property specifies that rate. > > + minimum: 1900 > > + maximum: 2100 > > + > > +required: > > + - compatible > > + - reg > > + - interrupts > > + - spi-cpha > > + - spi-cpol > > + > > +if: > > + properties: > > + compatible: > > + contains: > > + enum: > > + - adi,adis16500 > > + - adi,adis16505-1 > > + - adi,adis16505-2 > > + - adi,adis16505-3 > > + - adi,adis16507-1 > > + - adi,adis16507-2 > > + - adi,adis16507-3 > > + > > +then: > > + properties: > > + clock-names: > > + oneOf: > > + - const: sync > > + - const: direct-sync > > + - const: scaled-sync > > + > > + adi,burst32-enable: > > + description: > > + Enable burst32 mode. In this mode, a burst reading > > contains calibrated > > + gyroscope and accelerometer data in 32-bit format. > > + type: boolean > > + > > +examples: > > + - | > > + #include <dt-bindings/interrupt-controller/irq.h> > > + spi { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + adis16475: adis16475-3@0 { > > + compatible = "adi,adis16475-3"; > > + reg = <0>; > > + spi-cpha; > > + spi-cpol; > > + spi-max-frequency = <2000000>; > > + interrupts = <4 IRQ_TYPE_EDGE_RISING>; > > + interrupt-parent = <&gpio>; > > + }; > > + }; > > +... > > diff --git a/MAINTAINERS b/MAINTAINERS > > index f11262f1f3bb..f8ccc92ab378 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -1015,6 +1015,7 @@ W: > > http://ez.analog.com/community/linux-device-drivers > > S: Supported > > F: drivers/iio/imu/adis16475.c > > F: Documentation/ABI/testing/sysfs-bus-iio-imu-adis16475 > > +F: Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml > > > > ANALOG DEVICES INC ADM1177 DRIVER > > M: Beniamin Bia <beniamin.bia@xxxxxxxxxx> > > -- > > 2.25.1
