Hi Wolfram,
On Wed, Nov 15, 2017 at 03:32:21PM +0100, Wolfram Sang wrote:
> The datasheet was a bit vague, but after consultation with HW designers,
> we came to the conclusion that we should set the SCP bit always when
> dealing only with the ICE bit. A set SCP bit is ignored, and thus fine,
> a cleared one may trigger STOP on the bus.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> ---
>
> Jacopo: another to test, please. On top of all the other patches. Thank you!
and for this one as well, on Migo-R no visible regressions. I2c sensor
probes properly, and I can capture images.
Tested-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
Thanks
j
>
> drivers/i2c/busses/i2c-sh_mobile.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
> index 9012d5f8fb38b8..c2841a4f5807c0 100644
> --- a/drivers/i2c/busses/i2c-sh_mobile.c
> +++ b/drivers/i2c/busses/i2c-sh_mobile.c
> @@ -604,10 +604,10 @@ static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg,
>
> if (do_init) {
> /* Initialize channel registers */
> - iic_wr(pd, ICCR, 0);
> + iic_wr(pd, ICCR, ICCR_SCP);
>
> /* Enable channel and configure rx ack */
> - iic_wr(pd, ICCR, ICCR_ICE);
> + iic_wr(pd, ICCR, ICCR_ICE | ICCR_SCP);
>
> /* Set the clock */
> iic_wr(pd, ICCL, pd->iccl & 0xff);
> @@ -723,7 +723,7 @@ static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter,
> }
>
> /* Disable channel */
> - iic_wr(pd, ICCR, 0);
> + iic_wr(pd, ICCR, ICCR_SCP);
>
> /* Disable clock and mark device as idle */
> pm_runtime_put_sync(pd->dev);
> --
> 2.11.0
>
