linux-kernel - Re: [PATCH] ARM: pxa: let PXA27x select PINCTRL

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Date:	Sun, 24 Jan 2016 22:33:12 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:	Masahiro Yamada <yamada.masahiro@...ionext.com>, arm@...nel.org,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Daniel Mack <daniel@...que.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: pxa: let PXA27x select PINCTRL

On Sunday 24 January 2016 21:39:11 Robert Jarzmik wrote:
> Arnd Bergmann <arnd@...db.de> writes:
> 
> > On Saturday 23 January 2016 23:07:44 Robert Jarzmik wrote:
> >> I have this patch in my local tree for 2 monthes (see [1]). This is the patch
> >> I'd rather have. I had not posted it as I didn't think the pinctrl work was over
> >> yet. I know at least that pxa3xx is ready (as pinctrl-single should be used),
> >> and I had not the time to create the map for pxa25x.
> >
> > Once you are done, does that mean the plat-pxa/mfp.c stuff becomes
> > completely unused on pxa, or will it coexist with pinctrl?
> At first it will coexist.
> The main blocker so far I have are :
>  - the pinconf in platform_data platform to define sleep state pin levels
>    (aka. MFPR_LPM_DRIVE_LOW and MFPR_LPM_DRIVE_HIGH)
>    I have [1], but it's not working yet, ie. upon entering suspend to RAM, the
>    GPIO sleep registers are not programmed as expected.
>  - all the pxa machine code have to be migrated from MFP to pinctrl
> 
> So it will take time.

Ok.

> > I'm asking because it seems that at that point, the entire plat-pxa
> > directory can be removed, with the dma.c and ssp.c files getting
> > moved to mach-pxa, and mfp.c moved to mach-mmp. :-)
> dma.c will die soon enough anyway, ssp.c will move to mach-pxa indeed, and as
> for mfp.c it requires a bit of work.

Sounds good.

	Arnd