Signed-off-by: Sean Nyekjaer <sean.nyekjaer@xxxxxxxxx>
---
Still missing some ideas to dc-dc-phase and mode options :-)
Changes since v3:
- replaced '_' with '-'
- Now used actual values instead of register values.
Changes since v2:
- Removed defines, alot easier to read :-)
.../devicetree/bindings/iio/dac/ad5755.txt | 94 ++++++++++++++++++++++
1 file changed, 94 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/dac/ad5755.txt b/Documentation/devicetree/bindings/iio/dac/ad5755.txt
index 4c91583..83b4c3f 100644
--- a/Documentation/devicetree/bindings/iio/dac/ad5755.txt
+++ b/Documentation/devicetree/bindings/iio/dac/ad5755.txt
@@ -15,10 +15,104 @@ Recommended properties:
- spi-max-frequency: Definition as per
Documentation/devicetree/bindings/spi/spi-bus.txt
+Optional properties:
+See include/dt-bindings/iio/ad5755.h
+ - adi,ext-dc-dc-compenstation-resistor: boolean set if the hardware have an
+ external resistor and thereby bypasses
+ the internal compensation resistor.
+ - adi,dc-dc-phase:
+ Valid values for DC DC Phase control is:
+ 0: All dc-to-dc converters clock on the same edge.
+ 1: Channel A and Channel B clock on the same edge,
+ Channel C and Channel D clock on opposite edges.
+ 2: Channel A and Channel C clock on the same edge,
+ Channel B and Channel D clock on opposite edges.
+ 3: Channel A, Channel B, Channel C, and Channel D
+ clock 90 degrees out of phase from each other.
+ - adi,dc-dc-freq:
+ Valid values for DC DC frequency is [Hz]:
+ 250000
+ 410000
+ 650000
+ - adi,dc-dc-maxv:
+ Valid values for the maximum allowed Vboost voltage supplied by
+ the dc-to-dc converter is [mV]:
+ 23000
+ 24500
+ 27000
+ 29500
+
+Optional for every channel:
+ - adi,mode:
+ Valid values for DAC modes is:
+ 0: 0 V to 5 V voltage range.
+ 1: 0 V to 10 V voltage range.
+ 2: Plus minus 5 V voltage range.
+ 3: Plus minus 10 V voltage range.
+ 4: 4 mA to 20 mA current range.
+ 5: 0 mA to 20 mA current range.
+ 6: 0 mA to 24 mA current range.
+ - adi,ext-current-sense-resistor: boolean set if the hardware a external
+ current sense resistor.
+ - adi,enable-voltage-overrange: boolean enable voltage overrange
+ - adi,slew: Array of slewrate settings should contain 3 fields:
+ 1: Should be either 0 or 1 in order to enable or disable slewrate.
+ 2: Slew rate settings:
+ Valid values for the slew rate update frequency:
+ 64000
+ 32000
+ 16000
+ 8000
+ 4000
+ 2000
+ 1000
+ 500
+ 250
+ 125
+ 64
+ 32
+ 16
+ 8
+ 4
+ 0
+ 3: Slew step size:
+ Valid values for the step size LSBs:
+ 1
+ 2
+ 4
+ 16
+ 32
+ 64
+ 128
+ 256
+
Example:
dac@0 {
compatible = "adi,ad5755";
reg = <0>;
spi-max-frequency = <1000000>;
spi-cpha;
+ adi,dc-dc-phase = <0>;
+ adi,dc-dc-freq = <1>;
+ adi,dc-dc-maxv = <0>;
+ channel@0 {
+ adi,mode = <4>;
+ adi,ext-current-sense-resistor;
+ adi,slew = <0 64000 1>;
+ };
+ channel@1 {
+ adi,mode = <4>;
+ adi,ext-current-sense-resistor;
+ adi,slew = <0 64000 1>;
+ };
+ channel@2 {
+ adi,mode = <4>;
+ adi,ext-current-sense-resistor;
+ adi,slew = <0 64000 1>;
+ };
+ channel@3 {
+ adi,mode = <4>;
+ adi,ext-current-sense-resistor;
+ adi,slew = <0 64000 1>;
+ };
};
--
2.7.2
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