linux-kernel - RE: [EXT] Re: [v1 1/3] clk: ls1028a: Add clock driver for Display output interface

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Date:   Wed, 14 Aug 2019 10:27:11 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-devel@...ux.nxdi.nxp.com" <linux-devel@...ux.nxdi.nxp.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "liviu.dudau@....com" <liviu.dudau@....com>,
        Leo Li <leoyang.li@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Wen He <wen.he_1@....com>
Subject: RE: [EXT] Re: [v1 1/3] clk: ls1028a: Add clock driver for Display output interface

Quoting Wen He (2019-08-14 02:38:21)
> 
> 
> > -----Original Message-----
> > From: Stephen Boyd <sboyd@...nel.org>
> > Sent: 2019年8月14日 2:25
> > To: Michael Turquette <mturquette@...libre.com>; Wen He
> > <wen.he_1@....com>; Leo Li <leoyang.li@....com>;
> > linux-clk@...r.kernel.org; linux-devel@...ux.nxdi.nxp.com;
> > linux-kernel@...r.kernel.org; liviu.dudau@....com
> > Cc: Wen He <wen.he_1@....com>
> > Subject: [EXT] Re: [v1 1/3] clk: ls1028a: Add clock driver for Display output
> > interface
> > 
> > 
> > Quoting Wen He (2019-08-12 03:01:03)
> > > diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index
> > > 801fa1cd0321..0e6c7027d637 100644
> > > --- a/drivers/clk/Kconfig
> > > +++ b/drivers/clk/Kconfig
> > > @@ -223,6 +223,15 @@ config CLK_QORIQ
> > >           This adds the clock driver support for Freescale QorIQ platforms
> > >           using common clock framework.
> > >
> > > +config CLK_PLLDIG
> > > +        bool "Clock driver for LS1028A Display output"
> > > +        depends on ARCH_LAYERSCAPE && OF
> > 
> > Does it actually depend on either of these to build? Probabl not, so maybe just
> > default ARCH_LAYERSCAPE && OF? Also, can your Kconfig variable be named
> > something more specific like CLK_LS1028A_PLLDIG?
> 
> Actually it also depends Display modules, but we allow building display drivers as modules, 
> so is here whether need add Display modules depend and also allow clock driver building
> to a module? 
> Would it be better to reduce the number of the modules insert, I think the clock driver
> should be long available for the system.

I'm asking if it actually requires ARCH_LAYERSCAPE or OF to successfully
compile the file. Is that true? I don't see any asm/ includes or
anything that's going to fail if either of these configs aren't enabled.
So it seems safe to change this to 

	depends on ARCH_LAYERSCAPE || COMPILE_TEST
	default ARCH_LAYERSCAPE

so that it's compiled by default on this architecture and is available
to be compile tested by various test builders.

> 
> looks like great if named Kconfig variable to 'CLK_LS1028A_PLLDIG'.
> 
> >