Commit da652606 authored by addy ke's avatar addy ke Committed by Greg Kroah-Hartman

i2c: rk3x: fix interrupt handling issue

commit 9c5f7cad upstream.

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: default avatarAddy Ke <addy.ke@rock-chips.com>
Reviewed-by: default avatarHeiko Stuebner <heiko@sntech.de>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent eec28d8e
...@@ -399,7 +399,7 @@ static irqreturn_t rk3x_i2c_irq(int irqno, void *dev_id) ...@@ -399,7 +399,7 @@ static irqreturn_t rk3x_i2c_irq(int irqno, void *dev_id)
} }
/* is there anything left to handle? */ /* is there anything left to handle? */
if (unlikely(ipd == 0)) if (unlikely((ipd & REG_INT_ALL) == 0))
goto out; goto out;
switch (i2c->state) { switch (i2c->state) {
......
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