From: Heiko Schocher <hs@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] fsl_i2c: increase I2C timeout values and make them configurable
Date: Sun, 06 Sep 2009 11:09:54 +0200 [thread overview]
Message-ID: <4AA37C62.5090504@denx.de> (raw)
In-Reply-To: <1252099715-19255-1-git-send-email-timur@freescale.com>
Hello Timur,
Timur Tabi wrote:
> The value of I2C_TIMEOUT in fsl_i2c.c has several problems. First, it is
> defined as CONFIG_HZ/4, but it is used as a count of microseconds, so it makes
> no sense to derive it from a clock rate. Second, the current value (250) is
> too low for some boards, so it needs to be increased. Third, the timeout
> necessary for multiple-master arbitration is larger than the timeout for basic
> read/write operations, so we shouldn't have a single constant for both timeouts.
> Finally, it would be nice if we could override these values on a per-board
> basis.
>
> Signed-off-by: Timur Tabi <timur@freescale.com>
> ---
> drivers/i2c/fsl_i2c.c | 24 ++++++++++++++++++++----
> 1 files changed, 20 insertions(+), 4 deletions(-)
Applied to u-boot-i2c.git
Thanks for your work,
bye
Heiko
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
prev parent reply other threads:[~2009-09-06 9:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-04 21:28 [U-Boot] [PATCH] fsl_i2c: increase I2C timeout values and make them configurable Timur Tabi
2009-09-04 21:59 ` Wolfgang Denk
2009-09-04 22:57 ` Peter Tyser
2009-09-06 9:09 ` Heiko Schocher [this message]
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