From: Eddie James <eajames@linux.ibm.com>
Date: Wed, 11 May 2022 20:52:03 +0000 (-0500)
Subject: i2c: ast_i2c: Remove SCL direct drive mode
X-Git-Url: http://git.dujemihanovic.xyz/img/%7B%7B%20%24style.RelPermalink%20%7D%7D?a=commitdiff_plain;h=6ac25538d870685707e7cdebba771c79ada77e80;p=u-boot.git

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 c9ffe2d628..1c1d5566da 100644
--- 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