Messages in this thread Patch in this message | | | From | Addy Ke <> | Subject | [PATCH] i2c: rk3x: fix interrupt handling issue | Date | Fri, 8 Aug 2014 17:41:40 +0800 |
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If slave holds scl, I2C_IPD[7] will be set 1 by controller for debugging. Driver must ignore it.
[ 5.752391] rk3x-i2c ff160000.i2c: unexpected irq in WRITE: 0x80 [ 5.939027] rk3x-i2c ff160000.i2c: timeout, ipd: 0x80, state: 4
Signed-off-by: Addy Ke <addy.ke@rock-chips.com> --- drivers/i2c/busses/i2c-rk3x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c index 9e3084c..eab49e6 100644 --- a/drivers/i2c/busses/i2c-rk3x.c +++ b/drivers/i2c/busses/i2c-rk3x.c @@ -399,7 +399,7 @@ static irqreturn_t rk3x_i2c_irq(int irqno, void *dev_id) } /* is there anything left to handle? */ - if (unlikely(ipd == 0)) + if (unlikely((ipd & REG_INT_ALL) == 0)) goto out; switch (i2c->state) { -- 1.8.3.2
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