Message-Id: <20190607184621.D5C3F212F5@mail.kernel.org>
Date:   Fri, 07 Jun 2019 11:46:21 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/25] clk: sunxi-ng: clk parent rewrite part 1

Quoting Chen-Yu Tsai (2019-06-03 09:38:22)
> Hi Stephen,
> 
> On Mon, May 20, 2019 at 5:03 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
> >
> > On Mon, May 20, 2019 at 04:03:56PM +0800, Chen-Yu Tsai wrote:
> > > From: Chen-Yu Tsai <wens@...e.org>
> > >
> > > Hi everyone,
> > >
> > > This is series is the first part of a large series (I haven't done the
> > > rest) of patches to rewrite the clk parent relationship handling within
> > > the sunxi-ng clk driver. This is based on Stephen's recent work allowing
> > > clk drivers to specify clk parents using struct clk_hw * or parsing DT
> > > phandles in the clk node.
> > >
> > > This series can be split into a few major parts:
> > >
> > > 1) The first patch is a small fix for clk debugfs representation. This
> > >    was done before commit 1a079560b145 ("clk: Cache core in
> > >    clk_fetch_parent_index() without names") was posted, so it might or
> > >    might not be needed. Found this when checking my work using
> > >    clk_possible_parents.
> > >
> > > 2) A bunch of CLK_HW_INIT_* helper macros are added. These cover the
> > >    situations I encountered, or assume I will encounter, such as single
> > >    internal (struct clk_hw *) parent, single DT (struct clk_parent_data
> > >    .fw_name), multiple internal parents, and multiple mixed (internal +
> > >    DT) parents. A special variant for just an internal single parent is
> > >    added, CLK_HW_INIT_HWS, which lets the driver share the singular
> > >    list, instead of having the compiler create a compound literal every
> > >    time. It might even make sense to only keep this variant.
> > >
> > > 3) A bunch of CLK_FIXED_FACTOR_* helper macros are added. The rationale
> > >    is the same as the single parent CLK_HW_INIT_* helpers.
> > >
> > > 4) Bulk conversion of CLK_FIXED_FACTOR to use local parent references,
> > >    either struct clk_hw * or DT .fw_name types, whichever the hardware
> > >    requires.
> > >
> > > 5) The beginning of SUNXI_CCU_GATE conversion to local parent
> > >    references. This part is not done. They are included as justification
> > >    and examples for the shared list of clk parents case.
> >
> > That series is pretty neat. As far as sunxi is concerned, you can add my
> > Acked-by: Maxime Ripard <maxime.ripard@...tlin.com>
> >
> > > I realize this is going to be many patches every time I convert a clock
> > > type. Going forward would the people involved prefer I send out
> > > individual patches like this series, or squash them all together?
> >
> > For bisection, I guess it would be good to keep the approach you've
> > had in this series. If this is really too much, I guess we can always
> > change oru mind later on.
> 
> Any thoughts on this series and how to proceed?
> 

I have a few minor nitpicks but otherwise the series looks good to me.
I'm perfectly happy to see the individual patches unless you want to
squash them into one big patch. I can review the conversions either way.

Did you need me to apply any patches here? Or can I assume you'll resend
with a pull request so it can be merged into clk-next?

BTW, did you have to update any DT bindings or documentation? I didn't
see anything, so I'm a little surprised that all that stuff was already
in place.

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