linux-kernel - Re: [PATCH 1/3] ARM: davinci: hawk: fix mmc card detect gpio

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Date:   Tue, 22 Nov 2016 15:51:51 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Axel Haslam <ahaslam@...libre.com>
CC:     Kevin Hilman <khilman@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ARM: davinci: hawk: fix mmc card detect gpio

On Tuesday 22 November 2016 03:40 PM, Axel Haslam wrote:
> On Tue, Nov 22, 2016 at 10:53 AM, Sekhar Nori <nsekhar@...com> wrote:
>> On Monday 21 November 2016 09:45 PM, Axel Haslam wrote:
>>> The card detect gpio on the hawk board is gpio4_0 and not gpio3_12
>>>
>>> Signed-off-by: Axel Haslam <ahaslam@...libre.com>
>>
>> The LCDK and HawkBoard are different boards. The HawkBoard schematic
>> from eLinux.org page is broken, but looking for it on the net, I found
>> one and the MMC/SD CD pin in that schematic is indeed connected to GPIO3_12.
>>
>> So I believe the original code is correct.
> 
> mmm, ok, the lcdk is booted using the hawk board file,

I think this is just a coincidence. The LCDK came after the hawkboard as
its replacement, and I guess there was some effort to derive out of
hawkboard design. But they are not 100% software compatible, like you
are discovering now.

> so we should differentiate the two boards?

Yes.

> or should we just live with inconsistencies on the lcdk?

Not sure what you mean by "live with inconsistencies on the lcdk". The
two boards need to be treated as close cousins, but independent boards.

Thanks,
Sekhar