On Tue, Jul 5, 2011 at 17:01, Kevin Hilman <khil...@ti.com> wrote:
>
> Shubhrajyoti D <shubhrajy...@ti.com> writes:
>
> > Currently the fifo depth is set to zero for OMAP4 which disables
> > the FIFO usage. This patch enables the FIFO usage for I2C transactions
> > on OMAP4 also.
> >
> > Tested on omap4430 and 3430.
> >
> > Reported-By: Nishanth Menon <n...@ti.com>
> > Signed-off-by: Shubhrajyoti D <shubhrajy...@ti.com>
> > ---
> > Rebased on top of the series by Andy Green
> > http://www.spinics.net/lists/linux-i2c/msg05632.html
>
> Thanks.
>
> This is v3.1 material, but would be nice to see a couple tested-by or
> acked-by tags from folks that are more actively using the I2C driver
> before merging
For what it is worth: tested on SDP4460/4430 with 255 multi-byte i2c
read operation on twl6030.
Tested-by: Nishanth Menon <n...@ti.com>
Regards,
Nishanth Menon
>
> Kevin
>
>
> > drivers/i2c/busses/i2c-omap.c | 11 ++++++-----
> > 1 files changed, 6 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
> > index d53cd61..8f87a37 100644
> > --- a/drivers/i2c/busses/i2c-omap.c
> > +++ b/drivers/i2c/busses/i2c-omap.c
> > @@ -1068,13 +1068,14 @@ omap_i2c_probe(struct platform_device *pdev)
> > * size. This is to ensure that we can handle the status on
> > int
> > * call back latencies.
> > */
> > - if (dev->rev >= OMAP_I2C_REV_ON_3530_4430) {
> > - dev->fifo_size = 0;
> > +
> > + dev->fifo_size = (dev->fifo_size / 2);
> > +
> > + if (dev->rev >= OMAP_I2C_REV_ON_3530_4430)
> > dev->b_hw = 0; /* Disable hardware fixes */
> > - } else {
> > - dev->fifo_size = (dev->fifo_size / 2);
> > + else
> > dev->b_hw = 1; /* Enable hardware fixes */
> > - }
> > +
> > /* calculate wakeup latency constraint for MPU */
> > if (dev->set_mpu_wkup_lat != NULL)
> > dev->latency = (1000000 * dev->fifo_size) /
> --
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