Hi,

On Sun, Sep 18, 2016 at 05:18:14PM -0700, Lawrence Yu wrote:
> Hi.
> 
> I may be doing something wrong, but I noticed on branch sunxi-next after
> commit
> 
> [2c89ce4f4b19561218c1acb97172bd7ba1a6ddc2] ARM: sun8i: Convert the A23 and
> A33 to the CCU
> 
> the I2C bus on an A33 tablet appears to stop working.
> 
> After the commit i2cget responds as follows (with a long timeout)
> 
> # i2cget 0 0x40
> i2cget: WARNING! This program can confuse your I2C bus
> Continue? [y/N] y
> [  110.728256] i2c i2c-0: mv64xxx: I2C bus locked, block: 1, time_left: 0
> i2cget: read failed: Connection timed out
> 
> Before the commit i2cget responds with (returns very quickly)
> 
> # i2cget 0 0x40
> i2cget: WARNING! This program can confuse your I2C bus
> Continue? [y/N] y
> i2cget: read failed: No such device or address
> 
> I confirmed with logic analyzer attached to I2C bus that prior to the
> commit, there was activity on the I2C bus lines with i2cget, but after the
> commit, there is no activity on the I2C bus lines.
> 
> Can anyone else confirm?

Could you test with that patch http://code.bulix.org/jc1200-106165 ?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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