[PATCH] fix-i2c-s3c2410-resume-race.patch

[Tim Niemeyer]

Hallo,

* Andy Green <andy at openmoko.com> [25-02-08 13:19]:
> This is the cause of the timeouts and broken behaviour on resume for the
> I2C busses, and is doubtless the same cause of the BZ#79 reports of
On my configuration the I2C bus isn't suspended and this Patch breaks
the wakeup.
I build a patch (attached) that the bus will suspend.

> "cannot get bus (error -110)"
> 
> The patch rejects pre I2C resume accessess, leading to immediate resume and
> 
> [   17.310000] timer tcon=00500000, tcnt a2c1, tcfg 00000200,00000000,
> usec 00001eb8
> [   17.310000] s3c2440-i2c s3c2440-i2c: Hey I am still asleep, retry later
> [   17.310000] s3c2440-i2c s3c2440-i2c: Retrying transmission (0)
> [   17.310000] s3c2440-i2c s3c2440-i2c: Hey I am still asleep, retry later
> [   17.310000] s3c2440-i2c s3c2440-i2c: Retrying transmission (1)
> [   17.310000] pcf50633_work: Oh crap PMU IRQ register read failed -1
> [   17.310000] pcf50633_work: INT1=0x00 INT2=0x00 INT3=0x00 INT4=0x00
> INT5=0x00
> ...
> [   17.310000] s3c2440-i2c s3c2440-i2c: resuming


Tim Niemeyer
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