From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcus Folkesson Subject: [PATCH v2 2/3] dt-bindings: iio: adc: add bindings for mcp3911 Date: Tue, 24 Jul 2018 20:30:03 +0200 Message-ID: <20180724183004.20279-2-marcus.folkesson@gmail.com> References: <20180724183004.20279-1-marcus.folkesson@gmail.com> Return-path: In-Reply-To: <20180724183004.20279-1-marcus.folkesson@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Marcus Folkesson , Kent Gustavsson , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Rob Herring , Mark Rutland Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown List-Id: devicetree@vger.kernel.org MCP3911 is a dual channel Analog Front End (AFE) containing two synchronous sampling delta-sigma Analog-to-Digital Converters (ADC). Signed-off-by: Marcus Folkesson Signed-off-by: Kent Gustavsson --- Notes: v2: - drop channel width - drop `external_vref` - replace `external-clock` with proper clock bindings .../devicetree/bindings/iio/adc/mcp3911.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 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..af5472f51a84 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt @@ -0,0 +1,28 @@ +* 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: + - 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. + - clocks: Phandle and clock identifier (see clock-names) + - clock-names: "adc_clk" for the ADC (sampling) clock + +Example: +adc@0 { + compatible = "microchip,mcp3911"; + reg = <0>; + spi-max-frequency = <20000000>; + device-addr = <0>; + vref-supply = <&vref_reg>; + clocks = <&xtal>; + clock-names = "adc_clk"; +}; -- 2.11.0.rc2