Re: [PATCH/RFC 1/9] clk: shmobile: r8a7795: Add FCP clocks

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Morimoto-san,

On Thursday 03 March 2016 08:37:02 Kuninori Morimoto wrote:
> Hi Laurent
> 
> >>>>  - s2d2 (for 200MHz)
> >>>>  - s2d1 (for 400MHz)
> >>>
> >>> Thank you for the information. Do you mean that different FCP instances
> >>> use different clocks ? If so, could you tell us which clock is used by
> >>> each instance in th H3 ES1 ?
> >> 
> >> Sorry for my confusable mail.
> >> All FCP on H3 ES1 is using above,
> >> but, M3 or E3 will use different clock.
> >> 
> >> Is this more clear ?
> > 
> > Does it mean that every FCP instance uses both the S2D2 and the S2D1
> > clocks as functional clocks on H3 ES1 ?
> 
>  - s2d2 (200MHz) is for APB-IF,
>  - s2d1 (400MHz) is for AXI-IF, and internal
> 
> Is this clear answer ?

It is, thank you very much for putting up with my slow mind ;-)

Geert, deciding what clock to use as a parent for the MSTP clock becomes 
interesting, As S2D2 clocks the control interface I propose picking it. This 
shows the limits of the MSTP clock model though, MSTP is really a module stop 
bit, not a clock.

-- 
Regards,

Laurent Pinchart