On Mon, Sep 19, 2016 at 1:33 AM, Maxime Ripard < [email protected]> wrote:
> 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 ? > > The I2C bus appears to work properly with the patch and latest sunxi-next on a ga10h-v1.1 A33 tablet. I see activity on the bus and get a response using i2cget from devices on the bus. Thanks! > Thanks, > Maxime > > -- > Maxime Ripard, Free Electrons > Embedded Linux and Kernel engineering > http://free-electrons.com > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
