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Date:      Fri, 13 May 2011 17:26:28 +0200
From:      Henrik Brix Andersen <brix@FreeBSD.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-drivers@freebsd.org
Subject:   Re: Allocating resources to isab children
Message-ID:  <501C355E-0107-4185-8B47-C6D55ED71CB2@FreeBSD.org>
In-Reply-To: <4DCC8C27.2010605@FreeBSD.org>
References:  <3550EA55-ADDE-40AC-9C22-1FAC441A0BC8@freebsd.org> <0A707516-C7D1-4441-B17B-1273B6C256B0@FreeBSD.org> <A5AEBC94-8E50-49E0-A72E-9B9E8A73E7F6@FreeBSD.org> <201103141028.57324.jhb@freebsd.org> <87F8ACF6-822B-41E3-B832-890F7F68ABA2@FreeBSD.org> <4DCC8C27.2010605@FreeBSD.org>

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On May 13, 2011, at 03:40, John Baldwin wrote:
> On 5/12/11 5:45 PM, Henrik Brix Andersen wrote:
>>=20
>> Having completed the driver for the I2C host bus controller, I have =
revised the patch a little.
>> The updated patch is available at =
http://people.freebsd.org/~brix/src-patches/isa_pci.c.diff
>=20
> A few cosmetic nits:
>=20
> - I would use 'isab_pci_*' rather than 'isa_pci_*' as it is an ISA =
bridge rather than an ISA bus device.
> - You can probably leave out the blank line in isa[b]_pci_attach() =
between bus_generic_probe() and isab_attach().
>=20
> Other than that, you are fine to commit this with a reviewed by from =
me.

Thank you, committed with the changes suggested above.

>> I would appreciate it if you could find the time to review this and - =
if possible - approve a commit of this patch.
>>=20
>> The patch for the glxiic(4) I2C host bus driver is available at =
http://people.freebsd.org/~brix/src-patches/glxiic.diff - if somebody =
could find the time to review this as well, I would be very grateful. =
Since I do not have a commit bit for src, I will eventually need an =
approval for this to enter the tree as well.
>=20
> This mostly looks good to me.  I can't evaluate the actual driver =
logic, but the new-bus, etc. bits look fine.  One thing is that since =
you use callout_init_mtx(), I don't think you need any of the callout =
stuff at the start of your timeout routine =
(callout_pending/active/deactivate). With callout_init_mtx() your =
callout will only be called if it is active.  That is the only nit that =
I saw however.

Ah, right - thanks. I have updated the patch and retested without =
issues.

Since it seems we lack an official iicbus(4) maintainer (?), perhaps I =
should post this patch on the freebsd-embedded@ mailing list for review =
(as the CS5536 and I2C are often found in combination on SBCs such as =
the Alix boards from PC Engines). Hopefully somebody will be able to =
review the actual driver logic and provide approval.

Regards,
Brix
--=20
Henrik Brix Andersen <brix@FreeBSD.org>




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