diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2016-08-28 23:52:49 +0900 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-08-31 18:10:36 +0100 |
| commit | 50a6edb1b6e08643442386e8f81acc8123d17931 (patch) | |
| tree | 14984c981bfd00276fbd2a806938ef1315acb2ea /Documentation | |
| parent | 2d6d840a5a93c9493554d36cacabac797b441972 (diff) | |
iio: adc: add ADC12130/ADC12132/ADC12138 ADC driver
This adds Texas Instruments' ADC12130/ADC12132/ADC12138 12-bit plus
sign ADC driver. I have tested with the ADC12138. The ADC12130 and
ADC12132 are not tested but these are similar to ADC12138 except that
the mode programming instruction is a bit different.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/ti-adc12138.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/ti-adc12138.txt b/Documentation/devicetree/bindings/iio/adc/ti-adc12138.txt new file mode 100644 index 000000000000..049a1d36f013 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti-adc12138.txt @@ -0,0 +1,37 @@ +* Texas Instruments' ADC12130/ADC12132/ADC12138 + +Required properties: + - compatible: Should be one of + * "ti,adc12130" + * "ti,adc12132" + * "ti,adc12138" + - reg: SPI chip select number for the device + - interrupts: Should contain interrupt for EOC (end of conversion) + - clocks: phandle to conversion clock input + - spi-max-frequency: Definision as per + Documentation/devicetree/bindings/spi/spi-bus.txt + - vref-p-supply: The regulator supply for positive analog voltage reference + +Optional properties: + - vref-n-supply: The regulator supply for negative analog voltage reference + (Note that this must not go below GND or exceed vref-p) + If not specified, this is assumed to be analog ground. + - ti,acquisition-time: The number of conversion clock periods for the S/H's + acquisition time. Should be one of 6, 10, 18, 34. If not specified, + default value of 10 is used. + For high source impedances, this value can be increased to 18 or 34. + For less ADC accuracy and/or slower CCLK frequencies this value may be + decreased to 6. See section 6.0 INPUT SOURCE RESISTANCE in the + datasheet for details. + +Example: +adc@0 { + compatible = "ti,adc12138"; + reg = <0>; + interrupts = <28 IRQ_TYPE_EDGE_RISING>; + interrupt-parent = <&gpio1>; + clocks = <&cclk>; + vref-p-supply = <&ldo4_reg>; + spi-max-frequency = <5000000>; + ti,acquisition-time = <6>; +}; |