| Message ID | 20180808080917.2427-2-marcus.folkesson@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v4,1/3] iio: adc: add support for mcp3911 | expand |
On Wed, 8 Aug 2018 10:09:16 +0200 Marcus Folkesson <marcus.folkesson@gmail.com> wrote: > MCP3911 is a dual channel Analog Front End (AFE) containing two > synchronous sampling delta-sigma Analog-to-Digital Converters (ADC). > > Co-Developed-by: Kent Gustavsson <kent@minoris.se> > Signed-off-by: Kent Gustavsson <kent@minoris.se> > Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> > Reviewed-by: Rob Herring <robh@kernel.org> Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it. thanks, Jonathan > --- > > Notes: > v4: > - remove reference to Documentation/.../interrupts.txt > - add Kent as co-developer > v3: > - add bindings for interrupt > - prefix device-addr with `microchip` > - drop `clock-names` > v2: > - drop channel width > - drop `external_vref` > - replace `external-clock` with proper clock bindings > > .../devicetree/bindings/iio/adc/mcp3911.txt | 30 ++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/adc/mcp3911.txt > > diff --git a/Documentation/devicetree/bindings/iio/adc/mcp3911.txt b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt > new file mode 100644 > index 000000000000..3071f48fb30b > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt > @@ -0,0 +1,30 @@ > +* Microchip MCP3911 Dual channel analog front end (ADC) > + > +Required properties: > + - compatible: Should be "microchip,mcp3911" > + - reg: SPI chip select number for the device > + > +Recommended properties: > + - spi-max-frequency: Definition as per > + Documentation/devicetree/bindings/spi/spi-bus.txt. > + Max frequency for this chip is 20MHz. > + > +Optional properties: > + - clocks: Phandle and clock identifier for sampling clock > + - interrupt-parent: Phandle to the parent interrupt controller > + - interrupts: IRQ line for the ADC > + - microchip,device-addr: Device address when multiple MCP3911 chips are present on the > + same SPI bus. Valid values are 0-3. Defaults to 0. > + - vref-supply: Phandle to the external reference voltage supply. > + > +Example: > +adc@0 { > + compatible = "microchip,mcp3911"; > + reg = <0>; > + interrupt-parent = <&gpio5>; > + interrupts = <15 IRQ_TYPE_EDGE_RISING>; > + spi-max-frequency = <20000000>; > + microchip,device-addr = <0>; > + vref-supply = <&vref_reg>; > + clocks = <&xtal>; > +};
diff --git a/Documentation/devicetree/bindings/iio/adc/mcp3911.txt b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt new file mode 100644 index 000000000000..3071f48fb30b --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt @@ -0,0 +1,30 @@ +* Microchip MCP3911 Dual channel analog front end (ADC) + +Required properties: + - compatible: Should be "microchip,mcp3911" + - reg: SPI chip select number for the device + +Recommended properties: + - spi-max-frequency: Definition as per + Documentation/devicetree/bindings/spi/spi-bus.txt. + Max frequency for this chip is 20MHz. + +Optional properties: + - clocks: Phandle and clock identifier for sampling clock + - interrupt-parent: Phandle to the parent interrupt controller + - interrupts: IRQ line for the ADC + - microchip,device-addr: Device address when multiple MCP3911 chips are present on the + same SPI bus. Valid values are 0-3. Defaults to 0. + - vref-supply: Phandle to the external reference voltage supply. + +Example: +adc@0 { + compatible = "microchip,mcp3911"; + reg = <0>; + interrupt-parent = <&gpio5>; + interrupts = <15 IRQ_TYPE_EDGE_RISING>; + spi-max-frequency = <20000000>; + microchip,device-addr = <0>; + vref-supply = <&vref_reg>; + clocks = <&xtal>; +};