All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eddie James <eajames@linux.ibm.com>
To: u-boot@lists.denx.de
Cc: hs@denx.de, Eddie James <eajames@linux.ibm.com>
Subject: [PATCH] i2c: ast_i2c: Remove SCL direct drive mode
Date: Wed, 11 May 2022 15:52:03 -0500	[thread overview]
Message-ID: <20220511205203.54982-1-eajames@linux.ibm.com> (raw)

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>
---
 drivers/i2c/ast_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/ast_i2c.c b/drivers/i2c/ast_i2c.c
index 2d3fecaa14..8b24a260c0 100644
--- a/drivers/i2c/ast_i2c.c
+++ b/drivers/i2c/ast_i2c.c
@@ -76,7 +76,7 @@ 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
-- 
2.27.0


             reply	other threads:[~2022-05-11 20:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-11 20:52 Eddie James [this message]
2022-05-12  4:49 ` [PATCH] i2c: ast_i2c: Remove SCL direct drive mode Heiko Schocher
2022-05-19  0:28 ` Joel Stanley
2022-05-19  1:55   ` Ryan Chen
2022-07-19 11:53 ` Heiko Schocher

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220511205203.54982-1-eajames@linux.ibm.com \
    --to=eajames@linux.ibm.com \
    --cc=hs@denx.de \
    --cc=u-boot@lists.denx.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.