linux-kernel - Re: [PATCH RFC 3/3] spi: HiSilicon v3xx: Use DMI quirk to set controller buswidth override bits

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Message-ID: <a3b1711b-ed70-59d0-3326-991f1531db2b@huawei.com>
Date:   Fri, 28 Feb 2020 17:17:18 +0000
From:   John Garry <john.garry@...wei.com>
To:     Mark Brown <broonie@...nel.org>
CC:     <linuxarm@...wei.com>, <andriy.shevchenko@...ux.intel.com>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-spi@...r.kernel.org>
Subject: Re: [PATCH RFC 3/3] spi: HiSilicon v3xx: Use DMI quirk to set
 controller buswidth override bits

On 28/02/2020 16:20, Mark Brown wrote:
> On Fri, Feb 28, 2020 at 11:18:51PM +0800, John Garry wrote:
>> The Huawei D06 board (and variants) can support Quad mode of operation.
>>
>> Since we have no current method in ACPI SPI bus device resource description
>> to describe this information, use DMI to detect the board, and set the
>> controller buswidth override bits.
> 
> Hopefully this is something that the ACPI people will be looking to
> address going forwards :/
> 

Yeah, well I did mention the bugzilla [0] I raised for this in the cover 
letter; but I think that the new process workflows to raise feature 
requests in this way still needs to be formalized, so this may be 
blocked for now [1].

And unfortunately I can't actively participate in relevant standards WGs 
either, so if anyone else would like to assist, then that would great...

BTW, I think that it might also be good to request a generic 
jedec-compatible SPI NOR part ACPI HID/CID here also.

Thanks,
John

[0] https://bugzilla.tianocore.org/show_bug.cgi?id=2557
[1] https://edk2.groups.io/g/devel/message/53420

> 
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