Hi Felipe,

On 10/22/2012 11:46 AM, Felipe Balbi wrote:

on OMAP4+ we want to read IRQSTATUS_RAW register,
instead of IRQSTATUS. The reason being that IRQSTATUS
will only contain the bits which were enabled on
IRQENABLE_SET and that will break when we need to
poll for a certain bit which wasn't enabled as an
IRQ source.

One such case is after we finish converting to
deferred stop bit, we will have to poll for ARDY
bit before returning control for the client driver
in order to prevent us from trying to start a
transfer on a bus which is already busy.

Note, however, that omap-i2c.c needs a big rework
on register definition and register access. Such
work will be done in a separate series of patches.

Do you need OMAP_I2C_IP_VERSION_3 for OMAP4?

OMAP_I2C_IP_VERSION_2 was already introduced to detect OMAP3630 vs
omap4430 because they were sharing the same IP version..

/* I2C controller revisions present on specific hardware */
#define OMAP_I2C_REV_ON_2430            0x36
#define OMAP_I2C_REV_ON_3430_3530       0x3C
#define OMAP_I2C_REV_ON_3630_4430       0x40

So in theory you should not need an extra version.

Regards,
Benoit