[OpenWrt-Devel] Howto/advice: Patch for variant of hardware platform?

Dana Myers k6jq at comcast.net
Wed Feb 22 20:00:26 EST 2017


On 2/22/2017 4:27 PM, L. D. Pinney wrote:
> Are you using https://github.com/OnionIoT/source onion-omega2 branch ?
>

I am not; I'm using https://github.com/lede-project/source (master branch)

However, I don't believe it makes any difference - spi-mt7621.c appears
to be identical in both and the same patch applies; and this isn't an
Omega2-specific issue. All MT7688-based systems have this issue; MediaTek
Labs patched their LinkIt repo for this. A fix really belongs upstream.

Thanks -
Dana


> On Wed, Feb 22, 2017 at 2:30 PM, Dana Myers <k6jq at comcast.net <mailto:k6jq at comcast.net>> wrote:
>
>
>     I'm working with the Onion Omega2, which is based on an MT7688 SoC.
>     The MT7688 SoC is a variant of the MT76xx family; in particular, it
>     shares the same SPI peripheral. Support for SPI is in ..../drivers/spi/mt7621.c
>
>     However, there's  bugs with the SPI in the MT7688 which require a patch
>     to spi-mt7621.c - and I don't know if the same bugs are present in the
>     other MT76xx family members. It is possible the other MT76xx SoCs have
>     the same hardware issue (I'd be surprised if not) but I can only test
>     the MT7688 I have.
>
>     I think I want to patch the source file only when building only the MT7688
>     target, but I'm not sure how to do that or if it's supported.
>
>     So I'm looking for advice on how I might incorporate this patch so
>     that it is only applied when building ramips/mt7688.
>
>     Thanks,
>     Dana K6JQ
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