On Mon, Mar 06, 2017 at 03:20:51PM -0500, Chris Brandt wrote:
> While modifying the driver to use the STOP interrupt, the completion of the
> intermediate transfers need to wake the driver back up in order to initiate
> the next transfer (restart condition). Otherwise you get never ending
> interrupts and only the first transfer sent.
>
> Fixes: 71ccea095ea1 ("i2c: riic: correctly finish transfers")
> Reported-by: Simon Horman <[email protected]>
> Signed-off-by: Chris Brandt <[email protected]>
Thanks Chris,
with this patch applied on top of v4.11-rc1 Genmai once again boots
to userspace with shmobile_defconfig.
Tested-by: Simon Horman <[email protected]>
> ---
> drivers/i2c/busses/i2c-riic.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-riic.c b/drivers/i2c/busses/i2c-riic.c
> index 8f11d34..c811af4 100644
> --- a/drivers/i2c/busses/i2c-riic.c
> +++ b/drivers/i2c/busses/i2c-riic.c
> @@ -218,8 +218,12 @@ static irqreturn_t riic_tend_isr(int irq, void *data)
> }
>
> if (riic->is_last || riic->err) {
> - riic_clear_set_bit(riic, 0, ICIER_SPIE, RIIC_ICIER);
> + riic_clear_set_bit(riic, ICIER_TEIE, ICIER_SPIE, RIIC_ICIER);
> writeb(ICCR2_SP, riic->base + RIIC_ICCR2);
> + } else {
> + /* Transfer is complete, but do not send STOP */
> + riic_clear_set_bit(riic, ICIER_TEIE, 0, RIIC_ICIER);
> + complete(&riic->msg_done);
> }
>
> return IRQ_HANDLED;
> --
> 2.10.1
>
>
