Re: PCA9564: "bus is not idle" issue

[Yegor Yefremov <yegorslists-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>]

On Sun, Apr 4, 2010 at 5:29 AM, Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> wrote:
>> > > I'm using PCA9564 attached to a ks8695 SoC. During my efforts to get
>> > > 2.6.33/34 running on my system I noticed sporadic problems with RTC:
>> >
>> > [...]
>> >
>> > > static struct i2c_pca9564_pf_platform_data  __initdata pca_data ={
>> > >       .gpio = -1,
>> > >       .i2c_clock_speed = 59000,
>> > >       .timeout = 1,
>> > > };
>> >
>> > Commit 8e99ada8deaa9033600cd2c7d0a9366b0e99ab68 changed the timeout settings to
>> > jiffies. So, one jiffy as timeout will not work. Try 'HZ' here.
>>
>> So this means the bug isn't in the mainline kernel tree and I can
>> ignore it?
>
> A confirmation from Yegor would be nice, but his logs let me believe that
> this is really the cause.
>
>> As a side note, arch/blackfin/mach-bf561/boards/acvilon.c sets timeout
>> to 10000, so the actual timeout depends on the value of HZ, which is
>> probably not desirable. Not to mention that a timeout of over one
>> minute (worst case) doesn't seem too smart ;)
>
> There is also an i2c-gpio-user using non-HZ value. Will prepare patches.

Thank for your solution. I'll try it on Tuesday and confirm ASAP.

Happy Easter!

Best regards,
Yegor