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| author | Stefan Roese <sr@denx.de> | 2012-04-12 13:05:35 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-13 22:18:23 +0400 |
| commit | b3201b563d36eb799d3f9e14871d5dda2b11f3e8 (patch) | |
| tree | ed564c4124d4be56e44a8e98b987c38d2fec3bea /Documentation/devicetree | |
| parent | 6d59ba2f9676210b4631e9c447ab1c9faf0a9577 (diff) | |
| download | linux-b3201b563d36eb799d3f9e14871d5dda2b11f3e8.tar.xz | |
staging:iio:adc: Add SPEAr ADC driver
This patch implements the basic single data conversion support for
the SPEAr600 SoC ADC. The register layout of SPEAr600 differs a bit
from other SPEAr SoC variants (e.g. SPEAr3xx). These differences are
handled via DT compatible testing. Resulting in a multi-arch binary.
This driver is currently tested only on SPEAr600. Future patches may add
support for other SoC variants (SPEAr3xx) and features like software
buffer or DMA.
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt b/Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt new file mode 100644 index 000000000000..02ea23a63f20 --- /dev/null +++ b/Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt @@ -0,0 +1,26 @@ +* ST SPEAr ADC device driver + +Required properties: +- compatible: Should be "st,spear600-adc" +- reg: Address and length of the register set for the device +- interrupt-parent: Should be the phandle for the interrupt controller + that services interrupts for this device +- interrupts: Should contain the ADC interrupt +- sampling-frequency: Default sampling frequency + +Optional properties: +- vref-external: External voltage reference in milli-volts. If omitted + the internal voltage reference will be used. +- average-samples: Number of samples to generate an average value. If + omitted, single data conversion will be used. + +Examples: + + adc: adc@d8200000 { + compatible = "st,spear600-adc"; + reg = <0xd8200000 0x1000>; + interrupt-parent = <&vic1>; + interrupts = <6>; + sampling-frequency = <5000000>; + vref-external = <2500>; /* 2.5V VRef */ + }; |