linux-kernel - Re: [PATCH 1/7] clk: mmp: stop using platform headers

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Date:	Wed, 25 Nov 2015 22:57:33 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Eric Miao <eric.y.miao@...il.com>,
	Michael Turquette <mturquette@...libre.com>,
	linux-kernel@...r.kernel.org,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Chao Xie <chao.xie@...vell.com>,
	Mike Turquette <mturquette@...aro.org>,
	linux-clk@...r.kernel.org
Subject: Re: [PATCH 1/7] clk: mmp: stop using platform headers

On Wednesday 25 November 2015 13:32:22 Stephen Boyd wrote:
> On 11/25, Arnd Bergmann wrote:
> > On Wednesday 25 November 2015 11:21:14 Stephen Boyd wrote:
> > > On 11/25, Arnd Bergmann wrote:
> > > > diff --git a/drivers/clk/mmp/clk-mmp2.c b/drivers/clk/mmp/clk-mmp2.c
> > > > index 09d2832fbd78..38931dbd1eff 100644
> > > > --- a/drivers/clk/mmp/clk-mmp2.c
> > > > +++ b/drivers/clk/mmp/clk-mmp2.c
> > > > @@ -9,6 +9,7 @@
> > > >   * warranty of any kind, whether express or implied.
> > > >   */
> > > >  
> > > > +#include <linux/clk.h>
> > > 
> > > Why are we adding this include? I don't see any clk consumer API
> > > usage being added.
> > 
> > drivers/clk/mmp/clk-pxa910.c: In function 'pxa910_clk_init':
> > drivers/clk/mmp/clk-pxa910.c:166:2: error: implicit declaration of function 'clk_set_rate' [-Werror=implicit-function-declaration]
> >   clk_set_rate(uart_pll, 14745600);
> >   ^
> > drivers/clk/mmp/clk-pxa910.c:209:2: error: implicit declaration of function 'clk_set_parent' [-Werror=implicit-function-declaration]
> >   clk_set_parent(clk, uart_pll);
> >   ^
> > 
> > Is there anything I need to change here?
> > 
> 
> Hmph. I seems this broke when we removed the clk.h include from
> clk-provider.h, but nobody has noticed for months. Can you make a
> different commit to add the header? Otherwise we're sneaking in
> that include to get this file to compile again.

Ok, I hadn't noticed at all that it was broken in mainline already,
as the three mmp defconfigs do not use drivers/clk/ at all but instead
rely on arch/arm/mach-mmp/clock*.c instead, which has a separate
implementation.

With the move to multiplatform, the choice goes away and we use the
common clock implementation unconditionally.

	Arnd
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