netdev - Re: [PATCH v6 2/5] net: ethernet: cpsw: add optional third memory region for CONTROL module

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Date:	Tue, 27 Aug 2013 00:19:00 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Daniel Mack <zonque@...il.com>, <netdev@...r.kernel.org>,
	<bcousson@...libre.com>, <nsekhar@...com>,
	<sergei.shtylyov@...entembedded.com>, <davem@...emloft.net>,
	<ujhelyi.m@...il.com>, <vaibhav.bedia@...com>, <d-gerlach@...com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 2/5] net: ethernet: cpsw: add optional third memory
 region for CONTROL module

On Monday 26 August 2013 02:34 PM, Tony Lindgren wrote:
> * Daniel Mack <zonque@...il.com> [130823 12:39]:
>> At least the AM33xx SoC has a control module register to configure
>> details such as the hardware ethernet interface mode.
>>
>> I'm not sure whether all SoCs which feature the cpsw block have such a
>> register, so that third memory region is considered optional for now.
> Assuming you're talking about omap SCM registers here..
>
> This should be in a separate driver module so the control module
> parts can eventually be children of the SCM driver as they are
> really separate devices on the bus. See how the USB PHY parts were done
> for example.
>
> What do these control module registers do? If it's just multiplexing
> and pinconf, then you can use pinctrl-single,bits most likely for it and
> access it using the named modes.
>
> However, if the register also contains comparators and control for
> regulators, you should only use pinctrl-single for the multiplexing
> and pinconf parts.
>
I will take a look into usb control module driver and will try to adopt
the driver here also.

Regards
Mugunthan V N
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