1.Call i2c controller reset when the i2c transfer timeout occurred.
The rest of interrupts and device should be reset avoid unperdicted
controller behavior occurred.
Signed-off-by: Tommy Huang <tommy_huang@xxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-aspeed.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 2e5acfeb76c8..1900954deb55 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -699,12 +699,16 @@ static int aspeed_i2c_master_xfer(struct i2c_adapter *adap,
if (time_left == 0) {
/*
* If timed out and bus is still busy in a multi master
- * environment, attempt recovery at here.
+ * environment, attempt recovery at here. Even the bus is
+ * idle, we still need reset i2c controller avoid rest of
+ * interrupts.
*/
if (bus->multi_master &&
(readl(bus->base + ASPEED_I2C_CMD_REG) &
ASPEED_I2CD_BUS_BUSY_STS))
aspeed_i2c_recover_bus(bus);
+ else
+ aspeed_i2c_reset(bus);
/*
* If timed out and the state is still pending, drop the pending
--
2.25.1
