The current wait time of 1 ms is apparently too short in some
circumstances leading to following error when communicating
with a KSZ switch with 100 kHz from an i.MX8MN I2C controller:
ERROR: ksz9477-i2c ksz85630: error detecting KSZ9477: I/O error
Increasing the poll time to 5ms resolved this issue:
ksz9477-i2c ksz85630: Found KSZ9893
ksz9477-i2c ksz85630: chip id: 0x00989360
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-imx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index c0af446bcc25..28bd0072addf 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -201,7 +201,7 @@ static int i2c_fsl_trx_complete(struct i2c_adapter *adapter)
static int i2c_fsl_acked(struct i2c_adapter *adapter)
{
- return i2c_fsl_poll_status(adapter, 1, 0, I2SR_RXAK);
+ return i2c_fsl_poll_status(adapter, 5, 0, I2SR_RXAK);
}
static int i2c_fsl_start(struct i2c_adapter *adapter)
--
2.30.2
