Re: [PATCH v2] arm64: dts: imx8mp: use correct clock for eqos timestamping counter

[Johannes Zink]

Hi everyone,

On 7/22/23 03:49, Fabio Estevam wrote:
> On Fri, Jul 21, 2023 at 12:51 AM Johannes Zink <j.zink@xxxxxxxxxxxxxx> wrote:
> > The i.MX8MP Reference Manual rev 1 06/2021, section 11.7.2.5 "Timestamp
> > Support" indicates the PTP timestamp clock expects a typical frequency
> > of 125MHz.
> >
> > As this also improves the precision of the measured timestamps: assign
> > appropriate 125MHz Clock parent. As no one except the timestamping
> > counter uses this clock, there are no side-effects of this change in
> > other peripherals.
> >
> > Signed-off-by: Johannes Zink <j.zink@xxxxxxxxxxxxxx>
>
> Reviewed-by: Fabio Estevam <festevam@xxxxxxxxx>

please scratch this patch, the PTP Timestamping clock cannot be supplied with a 
125MHz clock, there is no 125MHz source in the MUX input and I misinterpreted 
the clocksummary when testing this patch.

Sorry for the noise,
Johannes


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