Date: Tue, 25 Aug 2020 13:33:13 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Andriy Gapon <avg@FreeBSD.org> Cc: freebsd-arm@freebsd.org Subject: Re: Kmod driver at iicbus. attach() and config_intrhook(9) Message-ID: <20200825203313.GJ4213@funkthat.com> In-Reply-To: <6be8abd0-185c-dbbb-5964-1e2ad92ad213@FreeBSD.org> References: <7fabb65d99aaa74775c1daa91bffb873@mh.net.ru> <3249fa7e-554a-83ef-57b2-7c38aa0b4591@FreeBSD.org> <20200819072409.GA59949@bluezbox.com> <05145b71692af74b103bb226a2e93a15e1e851cb.camel@freebsd.org> <d603cf3b852d5e18fa5faa9066f643a3@mh.net.ru> <20200820223918.GC4213@funkthat.com> <d709ba1d3473f5d4353dc1109c198f8acb8ffa28.camel@freebsd.org> <496ed13afb2327d6416664b4dacfc346@mh.net.ru> <20200824204708.GH4213@funkthat.com> <6be8abd0-185c-dbbb-5964-1e2ad92ad213@FreeBSD.org>
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Andriy Gapon wrote this message on Tue, Aug 25, 2020 at 10:21 +0300:
> On 24/08/2020 23:47, John-Mark Gurney wrote:
> > What driver is used for i2c on the Orange? I've tried to firgure it
> > out from dts + source, but it isn't clear.
>
> a10_twsi
Thanks. And this explains why I couldn't find it in arm/allwinner.. :)
Yeah, this is using bus_generic_attach...
But it looks like it supports interruptless operation. Is there a flag
for when interrupts are enabled?
Because the check in sys/dev/iicbus/twsi/twsi.c:twsi_transfer could be
changed from:
if (sc->have_intr == false)
to:
if (sc->have_intr == false || interrupts_not_enabled)
And that could fix things.
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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