Re: [PATCH v4 1/7] dt-bindings: clock: Add StarFive JH7110 PLL clock generator

[Torsten Duwe]

On Tue, 23 May 2023 10:56:43 +0800
Xingyu Wu <xingyu.wu@xxxxxxxxxxxxxxxx> wrote:

> On 2023/5/19 22:16, Conor Dooley wrote:
> > On Fri, May 19, 2023 at 03:57:33PM +0200, Torsten Duwe wrote:
> >> On Fri, May 12, 2023 at 10:20:30AM +0800, Xingyu Wu wrote:
> >> [...]
> >> >  #ifndef __DT_BINDINGS_CLOCK_STARFIVE_JH7110_CRG_H__
> >> >  #define __DT_BINDINGS_CLOCK_STARFIVE_JH7110_CRG_H__
> >> >  
> >> > +/* PLL clocks */
> >> > +#define JH7110_CLK_PLL0_OUT			0
> >> > +#define JH7110_CLK_PLL1_OUT			1
> >> > +#define JH7110_CLK_PLL2_OUT			2
> >> 
> >> In U-Boot commit 58c9c60b Yanhong Wang added:
> >> 
> >> +
> >> +#define JH7110_SYSCLK_PLL0_OUT                       190
> >> +#define JH7110_SYSCLK_PLL1_OUT                       191
> >> +#define JH7110_SYSCLK_PLL2_OUT                       192
> >> +
> >> +#define JH7110_SYSCLK_END                    193
> >> 
> >> in that respective file.
> >> 
> >> > +#define JH7110_PLLCLK_END			3
> >> > +
> >> >  /* SYSCRG clocks */
> >> >  #define JH7110_SYSCLK_CPU_ROOT			0
> >> 
> >> If the symbolic names referred to the same items, would it be possible
> >> to keep the two files in sync somehow?
> > 
> > Ohh, that's not good.. If you pass the U-Boot dtb to Linux it won't
> > understand the numbering. The headers are part of the dt-binding :/
> 
> Because PLL driver is separated from SYSCRG drivers in Linux,

Can you _please_ point me at that "PLL driver" "in Linux" ?
I seem to be unable to find it. All I can see is a stub in
drivers/clk/starfive/clk-starfive-jh7110-sys.c, which simply
sets the PLLs to 1000, 1066 and 1188 MHz fixed, respectively.

The comment above says

| They will be dropped and registered in the PLL clock driver instead.

and that's the one I'm looking for.

Thanks,

	Torsten