i2c: designware: Fix RX FIFO depth define on Wangxun 10Gb NIC

[ Upstream commit c94612a72ac87b0337a0d85b9263266776ed4190 ]

I believe RX FIFO depth define 0 is incorrect on Wangxun 10Gb NIC. It
must be at least 1 since code is able to read received data from the
DW_IC_DATA_CMD register.

For now this define is irrelevant since the txgbe_i2c_dw_xfer_quirk()
doesn't use the rx_fifo_depth member variable of struct dw_i2c_dev but
is needed when converting code into generic polling mode implementation.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index a7f6f3eafad7dd72241f57a2a356219d36bfaf56..ae835000fd32ae85de2d97ea85324798243c00e0 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -318,7 +318,7 @@ struct dw_i2c_dev {
 #define AMD_UCSI_INTR_EN                       0xd
 
 #define TXGBE_TX_FIFO_DEPTH                    4
-#define TXGBE_RX_FIFO_DEPTH                    0
+#define TXGBE_RX_FIFO_DEPTH                    1
 
 struct i2c_dw_semaphore_callbacks {
        int     (*probe)(struct dw_i2c_dev *dev);