linux-kernel - Re: [PATCH 2/2] clk: cs2000: add AUX

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Date:   Tue, 11 Apr 2017 09:22:26 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
CC:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 2/2] clk: cs2000: add AUX_OUT pin select support


Hi Geert

Thank you for your feedback

> > +- auxoutsrc:           select AUX_OUT source from these.
> > +                               refclk:         Timing Reference Clock
> > +                               clk_in:         Frequency Reference Clock
> > +                               pllclkout:      PLL Clock Output
> > +                               push-pull:      PLL Lock/Unlock Indication
> > +                               open-drain:     PLL Lock/Unlock Indication
> 
> AUX_OUT is an output pin?
> Hence, isn't this software configuration instead of hardware description?
> 
> Selection of refclk vs. clk_in vs. pllclkout can be implemented as a mux clock
> driver with three parents.
> 
> PLL Lock/Unlock Indication and its pinctrl are something different.
> How to support that?

I think mux clock is nice idea.
I will use this idea.

Best regards
---
Kuninori Morimoto