Re: [RESEND PATCH 0/1] add multiple clock handling for dwc2 driver

[Frank Wang]

Sorry to reformat the graph.

On 2017/2/6 9:40, Frank Wang wrote:
> Hi Heiko,
>
> On 2017/2/5 17:41, Heiko Stuebner wrote:
> > Hi Frank,
> >
> > Am Sonntag, 5. Februar 2017, 10:51:00 CET schrieb Frank Wang:
> > > The original posting on Jan 19th have not received any responses, so I
> > > resend them.
> > >
> > > The Current default dwc2 just handle one clock named otg, however,
> > > it may
> > > have two or more clock need to manage for some new SoCs(such as
> > > RK3328), so
> > > this adds change clk to clk's array of dwc2_hsotg to handle more clocks
> > > operation.
> > can you please give a bit more detail on the specific layout.
> >
> > I guess you're talking about hclk_otg_pmu, right? What component does it
> > supply, because I didn't find anything in the partial TRM in the PMU
> > section
> > relating to the "otg".
>
> Yes, it is hclk_otg_pmu.
>
> The rock-chip hclk_otg_pmu is an input clock for dwc2 PMU module which
> named pmu_hclk in chapter 2.4 of dwc otg databook v3.10.
> Please refer to the following simple clock tree from CRU part of
> rk3328 TRM.
>                      _ _ _ ...
>                     |
>                     |--> G19_8 --- hclk_otg ------->
> hclk_peri_pre -->    |
>                     |--> G19_9 --- hclk_otg_pmu --->
>                     |_ _ _ ...
>
>
> BR.
> Frank
>
> > This meant to make sure, you're actually controlling some part of the
> > dwc2
> > with that second/third/... clock and not some separate component.
> >
> >
> > Heiko