netdev - Re: [RESEND PATCH net 06/10] net: ethernet: mediatek: fix the loss

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Date:   Mon, 29 Aug 2016 12:27:13 +0800
From:   Sean Wang <sean.wang@...iatek.com>
To:     <andrew@...n.ch>
CC:     <john@...ozen.org>, <davem@...emloft.net>, <nbd@...nwrt.org>,
        <netdev@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
        <keyhaede@...il.com>
Subject: Re: [RESEND PATCH net 06/10] net: ethernet: mediatek: fix the loss

Date: Fri, 26 Aug 2016 16:17:59 +0200, Andrew Lunn wrote:
>> Hi Andrew,
>> 
>> Here pinctrl is used to setup what function the group of the pins is
>> for.
>
>Agreed.
> 
>> The group of the pins could be configured for the function provided 
>> by the SoC, such as general purpose I/O or specific function such as
>> ethernet depending on what products or boards you design for various 
>> customers or vendors. Thanks for device tree introducing, it is easy 
>> to find what resources the board needs including the pins usage is 
>> also defined here.
>
>All clear. However, if the ethernet driver has loaded, it means the
>device tree says the ethernet should be loaded, unless it happens to
>be on some discoverable bus. And so the device tree node for the
>ethernet should also contain the needed pinctrl properties.  The core
>driver code should of seen these properties and already enabled the
>correct pinctrl state before the driver probes.
>
>This is how every other driver works. Like i said, i don't think i've
>seen any other driver do its own pinctrl. So i just need a simple
>description, what is different here, why does this driver need to do
>it, when no other does?
>
>    Andrew
>

You are right
all that I need about pinctrl are all being done with core driver 
as you said, so the patch I did seems the redundant work and i will remove 
it from the patch set.

thanks for your patient and careful reviewing and that also helps me getting 
familiar with based driver with pinctrl more :)

Sean