i2c: ast_i2c: Remove SCL direct drive mode

SCL direct drive mode prevents communication with devices that
do clock stretching, so disable. The Linux driver doesn't use
this mode, and the engine can handle clock stretching.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: ryan_chen <ryan_chen@aspeedtech.com>

diff --git a/drivers/i2c/ast_i2c.c b/drivers/i2c/ast_i2c.c
index c9ffe2d62820a8527cc22209f88e9608cdb24d33..1c1d5566dad41365044e51f30736665afd8dad72 100644 (file)
--- a/drivers/i2c/ast_i2c.c
+++ b/drivers/i2c/ast_i2c.c
@@ -77,7 +77,7 @@ static void ast_i2c_init_bus(struct udevice *dev)
        /* Enable Master Mode. Assuming single-master */
        writel(I2CD_MASTER_EN
               | I2CD_M_SDA_LOCK_EN
-              | I2CD_MULTI_MASTER_DIS | I2CD_M_SCL_DRIVE_EN,
+              | I2CD_MULTI_MASTER_DIS,
               &priv->regs->fcr);
        /* Enable Interrupts */
        writel(I2CD_INTR_TX_ACK