Date: Wed, 29 May 2019 15:12:51 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Niclas Zeising <zeising@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r348355 - head/sys/dev/iicbus Message-ID: <def030c0-80a5-84ca-bb48-7009aa34e69c@FreeBSD.org> In-Reply-To: <c3f1c60b-24b2-6098-501a-8cb81ef66d57@freebsd.org> References: <201905290908.x4T98L89066643@repo.freebsd.org> <c3f1c60b-24b2-6098-501a-8cb81ef66d57@freebsd.org>
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On 29/05/2019 14:54, Niclas Zeising wrote: > On 2019-05-29 11:08, Andriy Gapon wrote: >> Author: avg >> Date: Wed May 29 09:08:20 2019 >> New Revision: 348355 >> URL: https://svnweb.freebsd.org/changeset/base/348355 >> >> Log: >> revert r273728 and parts of r306589, iicbus no-stop by default feature >> Since drm2 removal, there has not been any consumer of the feature in the >> tree. I am also unaware of any out-of-tree consumer. >> More importantly, the feature has been broken from the very start, both >> before and after r306589, because the ivar was set on a device that does >> not support it and it was read from another device that also does not >> support it. >> A bus-wide no-stop flag cannot be implemented as an ivar as iicbus >> attaches as a child of various drivers. Implementing the ivar in each >> and every I2C driver is just impractical. >> If we ever want to implement this feature properly, then probably the >> easiest way to do it would be via a flag in the softc of iicbus. >> In fact, we might have to do that in the stable branches if we want to >> fix the code for them. >> Reported by: ian (long time ago) >> MFC after: 1 month (maybe) >> X-MFC-note: cannot just merge the change, must keep drm2 happy >> > > Hi! > Just a note, be aware that drm2 lives on in ports as drm-legacy-kmod. I haven't > tested, but, from the description above I worry that it will affect the port. > What do you think? Oh, I forgot about that one... I think that it could be affected if it still uses FreeBSD iic code. I guess I might have to revert the change. -- Andriy Gapon
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