From: "Pali Rohár" <pali@kernel.org>
To: u-boot@lists.denx.de
Subject: [PATCH] Nokia RX-51: Decrease i2c speed to 100000
Date: Sat, 21 Nov 2020 23:30:11 +0100 [thread overview]
Message-ID: <20201121223011.14262-1-pali@kernel.org> (raw)
It looks like that i2c bus lot of times timeout on some units. Prior
migration to CONFIG_DM_I2C i2c speed was set to CONFIG_SYS_OMAP24_I2C_SPEED
value which was 100000. Lower speed fixes timeout problems, so change speed
back to its previous value.
Signed-off-by: Pali Roh?r <pali@kernel.org>
Fixes: 8d8c18170325 ("Nokia RX-51: Convert to CONFIG_DM_I2C")
---
Please include this patch into U-Boot master branch for 2020.01 release
to have i2c bus working.
---
board/nokia/rx51/rx51.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/board/nokia/rx51/rx51.c b/board/nokia/rx51/rx51.c
index 3d62b5d9ad..2dd41604c9 100644
--- a/board/nokia/rx51/rx51.c
+++ b/board/nokia/rx51/rx51.c
@@ -704,9 +704,9 @@ void board_mmc_power_init(void)
}
static const struct omap_i2c_platdata rx51_i2c[] = {
- { I2C_BASE1, 2200000, OMAP_I2C_REV_V1 },
+ { I2C_BASE1, 100000, OMAP_I2C_REV_V1 },
{ I2C_BASE2, 100000, OMAP_I2C_REV_V1 },
- { I2C_BASE3, 400000, OMAP_I2C_REV_V1 },
+ { I2C_BASE3, 100000, OMAP_I2C_REV_V1 },
};
U_BOOT_DEVICES(rx51_i2c) = {
--
2.20.1
next reply other threads:[~2020-11-21 22:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-21 22:30 Pali Rohár [this message]
2020-11-28 12:29 ` [PATCH] Nokia RX-51: Decrease i2c speed to 100000 Pali Rohár
2020-11-28 12:48 ` Michael Nazzareno Trimarchi
2020-11-28 12:59 ` Pali Rohár
2020-11-28 13:02 ` Michael Nazzareno Trimarchi
2020-11-28 13:04 ` Pali Rohár
2020-11-29 17:37 ` [maemo-leste] " Pavel Machek
2021-01-05 6:21 ` Lokesh Vutla
2021-01-05 10:39 ` Pali Rohár
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=20201121223011.14262-1-pali@kernel.org \
--to=pali@kernel.org \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox