Commit 9c5f7cad authored Aug 08, 2014 by addy ke Committed by Wolfram Sang Aug 08, 2014

i2c: rk3x: fix interrupt handling issue



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>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org

parent 64bdfbfc

drivers/i2c/busses/i2c-rk3x.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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) {