linux-kernel - Re: [RFC PATCH 01/21] mfd: uniphier: add UniPhier MFD driver

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Date:	Wed, 11 May 2016 08:38:55 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Arnd Bergmann <arnd@...db.de>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Guenter Roeck <linux@...ck-us.net>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Jiri Slaby <jslaby@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-clk@...r.kernel.org, Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [RFC PATCH 01/21] mfd: uniphier: add UniPhier MFD driver

On Wed, 11 May 2016, Masahiro Yamada wrote:

> Hi Lee,
> 
> 2016-05-10 20:26 GMT+09:00 Lee Jones <lee.jones@...aro.org>:
> >> +};
> >> +MODULE_DEVICE_TABLE(of, uniphier_mfd_match);
> >
> > NACK.  Please do not mix MFD and DT registration.
> 
> OK, thanks for review.
> 
> 
> My basic thought was:
> 
>   - Add an MFD node to my DTS only once.
>     If I need to expand it in the future, I will just
>     need to modify drivers/mtd/uniphier-mfd.c.
>     It is just kernel-internal modification, so it does not
>     bother DT binding at all.
> 
>   - Simplify the node topology of DTS.

Just describe the hardware in DT.  If you do so accurately, there
should be no requirement to change it (in theory).

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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