linux-kernel - Re: [PATCH 2/3] pinctrl: nsp: add pinmux driver support for Broadcom NSP SoC

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Message-ID: <565C81E4.90507@broadcom.com>
Date:	Mon, 30 Nov 2015 09:05:40 -0800
From:	Ray Jui <rjui@...adcom.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	"Yendapally Reddy Dhananjaya Reddy" <yrdreddy@...adcom.com>,
	Stephen Warren <swarren@...dotorg.org>
CC:	Scott Branden <sbranden@...adcom.com>,
	Jon Mason <jonmason@...adcom.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH 2/3] pinctrl: nsp: add pinmux driver support for Broadcom
 NSP SoC

Hi Linus,

On 11/30/2015 4:49 AM, Linus Walleij wrote:
> On Fri, Nov 20, 2015 at 6:57 PM, Yendapally Reddy Dhananjaya Reddy
> <yrdreddy@...adcom.com> wrote:
>
>> This adds the initial support of the Broadcom NSP pinmux driver.
>>
>> Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yrdreddy@...adcom.com>
>
> So what does Ray and Stephen say about this?
>
> Is the hardware unique enough to warrant its own driver?
>
> Or should it utilize/extend one of the existing Broadcom
> drivers?

Currently, the IOMUX configurations in Cygnus, NSP, and NS2 are 
completely different and require a separate driver to each of these 
SoCs. We now realize the shortcomings and have been communicating with 
our ASIC team. We'd like to fix this for the next-gen of our SoC. We are 
driving towards using a register layout that will allow us to use just 
"pinctrl-single" and "pinconf-single."

>
> Yours,
> Linus Walleij
>

Thanks,

Ray
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