[U-Boot] [PATCH v3] OMAP: I2C: New read, write and probe functions

[Lubomir Popov]

Hi Tom,

> On Thu, May 30, 2013 at 10:37:42AM -0400, Tom Rini wrote:
>> On Thu, May 30, 2013 at 01:24:42AM +0300, Lubomir Popov wrote:
>>
>> > Tested on OMAP4/5 only, but should work on older OMAPs and
>> > derivatives as well.
>> >
>> > - Rewritten i2c_read to operate correctly with all types of chips
>> >   (old function could not read consistent data from some I2C slaves).
>> > - Optimised i2c_write.
>> > - New i2c_probe, optionally selectable via CONFIG_I2C_PROBE_WRITE,
>> >   performs write access vs read. The old probe could hang the system
>> >   under certain conditions (e.g. unconfigured pads).
>> > - The read/write/probe functions try to identify unconfigured bus.
>> > - Status functions now read irqstatus_raw as per TRM guidelines
>> >   (except for OMAP243X and OMAP34XX).
>> > - Driver now supports up to I2C5 (OMAP5).
>> >
>> > Signed-off-by: Lubomir Popov <lpopov at mm-sol.com>
>>
>> With CONFIG_I2C_PROBE_WRITE set:
>> Tested-by: Tom Rini <trini at ti.com> on Beagleboard / Beagleboard xM
>
> But, crap, breaks am335x_evm (and probably beaglebones, etc).  I'll
> dig into this more to see if I can spot something obvious tomorrow.
>
OK, holding off. And thanks for testing.
>
> --
> Tom
>
-- 
Lubo