linux-kernel - Re: [PATCH v2 0/7] ARM: berlin: add pinctrl support

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Date:	Thu, 24 Apr 2014 14:52:20 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Antoine Ténart <antoine.tenart@...e-electrons.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	zhiming Xu <zmxu@...vell.com>,
	Jisheng Zhang <jszhang@...vell.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/7] ARM: berlin: add pinctrl support

On Wed, Apr 23, 2014 at 5:51 PM, Antoine Ténart
<antoine.tenart@...e-electrons.com> wrote:

> This series adds support for the Marvell Berlin pin-controller, allowing
> to configure the pin muxing from the device tree.
>
> The Berlin pin-controller support is divided into 3 drivers, each
> driving one Berlin SoC. These drivers use a Berlin common part.
>
> This series applies on top of patches introducing the Marvell Berlin
> BG2Q you can find on Sebastian's berlin/for-next branch[1] and the patch
> allowing not to define the get_group_pins() function[2].
>
> Tested on the Berlin BG2Q.

So now I need some advice from the mvebu pinctrl maintainers
(Thomas, Sebastian etc):

- Is this a totally different pin controller so that drivers/pinctrl/mvebu
 can not be used?

- Really?

- OK can you help me review this thing?

- Should the base folder really be named "berlin" or is this going to
  be part of a bigger family of pin controllers so a more neutral name
  should be sought?

- Why do hardware engineers seek to reinvent wheels like pin
  controllers, GPIO and DMA engines all the time :-/

Yours,
Linus Walleij
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