[PATCH v3 3/6] clk: imx: imx8mp: Add audiomix block control

[Peng Fan]

> Subject: Re: [PATCH v3 3/6] clk: imx: imx8mp: Add audiomix block control
> 
> On 6/28/22 09:44, Abel Vesa wrote:
> > On 22-06-27 18:23:33, Marek Vasut wrote:
> >> On 6/27/22 17:35, Abel Vesa wrote:
> >>> On 22-06-25 03:32:32, Marek Vasut wrote:
> >>>> Unlike the other block control IPs in i.MX8M, the audiomix is
> >>>> mostly a series of clock gates and muxes. Model it as a large
> >>>> static table of gates and muxes with one exception, which is the
> >>>> PLL14xx . The PLL14xx SAI PLL has to be registered separately.
> >>>>
> >>>
> >>> Again, there is a chance that the blk-ctrl driver might disable the
> >>> PD from under this.
> >>
> >> Can you elaborate a bit more on this ? How/why do you think so ?
> >
> > At some point, the PDs from the Audiomix IP block will be added to the
> > drivers/soc/imx/imx8mp-blk-ctrl.c. Then, you'll have 2 drivers with
> > the same address range and the imx8mp-blk-ctrl also has runtime PM
> enabled.
> 
> Why would the PDs be added into the block control driver?
> 
> The audiomix is purely a clock mux driver, not really a block control driver
> providing PDs of its own.

I recalled that with with blk-ctrl working as clock provider, there is dead lock
issue, if the blk-ctrl node has a power-domain entry. Not very sure.

Regards,
Peng.