Re: [PATCH] i2c: designware: use enable on resume instead initialization

christian.ruppert
2015-06-24T07:34:57Z

Dear Lucas,

Lucas De Marchi <lucas.de.marchi@gmail.com> wrote on 23.06.2015 19:02:03:
> On Tue, Jun 23, 2015 at 1:45 PM, <christian.ruppert@alitech.com> wrote:
> > Hello,
> >
> > Christian Ruppert/ALi_GVA/ALi wrote on 10.06.2015 17:05:16:
> [...]
> > The result is not very encouraging: Out of five (identical) designware
i2c
> > controllers we have on my test SOC, the first one initialises properly
but
> > the second one gets stuck in the famous irq loop right away when the
> > module is enabled in i2c_dw_init. The system never gets around to try
>
> Are you using the pci or platform driver? I noticed yesterday the pci
> version is failing here with a NULL pointer dereference.

The test was performed with the platform driver (instantiated through
device tree).
I just re-checked and the ultimate problem which hangs/kills the system in
my case is the IRQ loop.
I haven't observed any NULL pointer dereferences on the road.

Greetings,
Christian