On 16/01/2023 10:55, Siddharth Vadapalli wrote:
> From: Grygorii Strashko <grygorii.strashko@xxxxxx>
>
> CPTS doesn't have HW support for PPS ("pulse per second”) signal
> generation, but it can be modeled by using Time Sync Router and routing
> GenFx (periodic signal generator) output to CPTS_HWy_TS_PUSH (hardware time
> stamp) input, and configuring GenFx to generate 1sec pulses.
>
> +------------------------+
> | CPTS |
> | |
> +--->CPTS_HW4_PUSH GENFx+---+
> | | | |
> | +------------------------+ |
> | |
> +--------------------------------+
>
> Add corresponding support to am65-cpts driver. The DT property "ti,pps"
> has to be used to enable PPS support and configure pair
> [CPTS_HWy_TS_PUSH, GenFx].
>
> Once enabled, PPS can be tested using ppstest tool:
> # ./ppstest /dev/pps0
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
Reviewed-by: Roger Quadros <rogerq@xxxxxxxxxx>
