c9aeb249bf
There was a spelling mistake on TSC/ADC binding where "coordinate" was spelled as "coordiante". We can't simply fix the error due to DT being an ABI, the approach taken was to first use correct spelling and if that fails, fall back to miss-spelled version. It's unfortunate that has creeped into the tree. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
44 lines
1.5 KiB
Text
44 lines
1.5 KiB
Text
* TI - TSC ADC (Touschscreen and analog digital converter)
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Required properties:
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- child "tsc"
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ti,wires: Wires refer to application modes i.e. 4/5/8 wire touchscreen
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support on the platform.
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ti,x-plate-resistance: X plate resistance
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ti,coordinate-readouts: The sequencer supports a total of 16
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programmable steps each step is used to
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read a single coordinate. A single
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readout is enough but multiple reads can
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increase the quality.
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A value of 5 means, 5 reads for X, 5 for
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Y and 2 for Z (always). This utilises 12
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of the 16 software steps available. The
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remaining 4 can be used by the ADC.
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ti,wire-config: Different boards could have a different order for
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connecting wires on touchscreen. We need to provide an
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8 bit number where in the 1st four bits represent the
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analog lines and the next 4 bits represent positive/
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negative terminal on that input line. Notations to
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represent the input lines and terminals resoectively
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is as follows:
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AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
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XP = 0, XN = 1, YP = 2, YN = 3.
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- child "adc"
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ti,adc-channels: List of analog inputs available for ADC.
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AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
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Example:
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tscadc: tscadc@44e0d000 {
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compatible = "ti,am3359-tscadc";
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tsc {
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ti,wires = <4>;
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ti,x-plate-resistance = <200>;
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ti,coordiante-readouts = <5>;
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ti,wire-config = <0x00 0x11 0x22 0x33>;
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};
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adc {
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ti,adc-channels = <4 5 6 7>;
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};
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}
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