On Wed, 25 Aug 2021 17:24:43 +0200
Miquel Raynal <miquel.raynal@xxxxxxxxxxx> wrote:
> Now that the three hardware peaces described in this file have been
> translated in yaml in 3 dedicated files (MFD, touchscreen controller and
> ADC) it is time to remove this text file.
>
> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Acked-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Nice to have another one of these go away :)
> ---
> .../bindings/input/touchscreen/ti-tsc-adc.txt | 91 -------------------
> 1 file changed, 91 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt b/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
> deleted file mode 100644
> index aad5e34965eb..000000000000
> --- a/Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
> +++ /dev/null
> @@ -1,91 +0,0 @@
> -* TI - TSC ADC (Touschscreen and analog digital converter)
> -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> -
> -Required properties:
> -- mfd
> - compatible: Should be
> - "ti,am3359-tscadc" for AM335x/AM437x SoCs
> - "ti,am654-tscadc", "ti,am3359-tscadc" for AM654 SoCs
> -- child "tsc"
> - compatible: Should be "ti,am3359-tsc".
> - ti,wires: Wires refer to application modes i.e. 4/5/8 wire touchscreen
> - support on the platform.
> - ti,x-plate-resistance: X plate resistance
> - ti,coordinate-readouts: The sequencer supports a total of 16
> - programmable steps each step is used to
> - read a single coordinate. A single
> - readout is enough but multiple reads can
> - increase the quality.
> - A value of 5 means, 5 reads for X, 5 for
> - Y and 2 for Z (always). This utilises 12
> - of the 16 software steps available. The
> - remaining 4 can be used by the ADC.
> - ti,wire-config: Different boards could have a different order for
> - connecting wires on touchscreen. We need to provide an
> - 8 bit number where in the 1st four bits represent the
> - analog lines and the next 4 bits represent positive/
> - negative terminal on that input line. Notations to
> - represent the input lines and terminals resoectively
> - is as follows:
> - AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
> - XP = 0, XN = 1, YP = 2, YN = 3.
> -- child "adc"
> - compatible: Should be
> - "ti,am3359-adc" for AM335x/AM437x SoCs
> - "ti,am654-adc", "ti,am3359-adc" for AM654 SoCs
> - ti,adc-channels: List of analog inputs available for ADC.
> - AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
> -
> -Optional properties:
> -- child "tsc"
> - ti,charge-delay: Length of touch screen charge delay step in terms of
> - ADC clock cycles. Charge delay value should be large
> - in order to avoid false pen-up events. This value
> - effects the overall sampling speed, hence need to be
> - kept as low as possible, while avoiding false pen-up
> - event. Start from a lower value, say 0x400, and
> - increase value until false pen-up events are avoided.
> - The pen-up detection happens immediately after the
> - charge step, so this does in fact function as a
> - hardware knob for adjusting the amount of "settling
> - time".
> -
> -- child "adc"
> - ti,chan-step-opendelay: List of open delays for each channel of
> - ADC in the order of ti,adc-channels. The
> - value corresponds to the number of ADC
> - clock cycles to wait after applying the
> - step configuration registers and before
> - sending the start of ADC conversion.
> - Maximum value is 0x3FFFF.
> - ti,chan-step-sampledelay: List of sample delays for each channel
> - of ADC in the order of ti,adc-channels.
> - The value corresponds to the number of
> - ADC clock cycles to sample (to hold
> - start of conversion high).
> - Maximum value is 0xFF.
> - ti,chan-step-avg: Number of averages to be performed for each
> - channel of ADC. If average is 16 then input
> - is sampled 16 times and averaged to get more
> - accurate value. This increases the time taken
> - by ADC to generate a sample. Valid range is 0
> - average to 16 averages. Maximum value is 16.
> -
> -Example:
> - tscadc: tscadc@44e0d000 {
> - compatible = "ti,am3359-tscadc";
> - tsc {
> - ti,wires = <4>;
> - ti,x-plate-resistance = <200>;
> - ti,coordiante-readouts = <5>;
> - ti,wire-config = <0x00 0x11 0x22 0x33>;
> - ti,charge-delay = <0x400>;
> - };
> -
> - adc {
> - ti,adc-channels = <4 5 6 7>;
> - ti,chan-step-opendelay = <0x098 0x3ffff 0x098 0x0>;
> - ti,chan-step-sampledelay = <0xff 0x0 0xf 0x0>;
> - ti,chan-step-avg = <16 2 4 8>;
> - };
> - }
