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i2c: riic: fix restart condition 

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: 71ccea095e ("i2c: riic: correctly finish transfers")
Reported-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Tested-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Chris Brandt 2017-03-06 15:20:51 -05:00 committed by Wolfram Sang
parent c1ae3cfa0e
commit 2501c1bb05
1 changed files with 5 additions and 1 deletions
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6
drivers/i2c/busses/i2c-riic.c
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@ -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;