Re: [PATCH v2] arm: omap: hwmod: make *phy_48m* as the main_clk ofocp2scp

[Paul Walmsley]

On Thu, 13 Sep 2012, Benoit Cousson wrote:

> In this case, the ocp2scp IP is just the *bus controller* to access the
> real USB_UTMI_PHY IP.
> 
> The TRM diagram does not show that level of detail unfortunately. You
> can check the PRCM spec (Figure 78 : CD_L3_INIT_USB clock scheme) to see
> the two modules.
> 
> So considering phy_48m as the main clock is still correct for the
> ocp2scp IP.
> 
> The INIT_960M_FCLK will be a fck associated with the child of the
> ocp2scp nodes which is the usb_phy.
> 
> Upgrading the opt_clk to fck does make sense as soon as we don't have
> any other functional clock and as soon as this clock is *mandatory*. The
> optional aspect in that case is just a wrong PRCM naming for a clock
> that is mandatory. It is similar to the DSS case that does have only
> optional clocks that are mandatory.
> 
> I do agree that we must stick to the HW definition as far as we can. But
> the optional attribute is something that is wrong/inaccurate for a
> couple of IPs. HW folks agreed on that point and will fix that in the
> future.

Okay so is this an Acked-by for this patch? :-)

If so I'll take it.


- Paul
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