From: Arjan van de Ven <arjan@infradead.org>
To: Corey Minyard <minyard@acm.org>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] I2C patch 5 - Add a non-blocking interface to the I2C core (again)
Date: Fri, 25 Feb 2005 15:36:07 +0100 [thread overview]
Message-ID: <1109342168.6290.59.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <421F35AB.2040305@acm.org>
> +/* Another note: This interface is extremely sensitive to timing and
> + failure handling. If you don't wait at least one jiffie after
> + starting the transaction before checking things, you will screw it
> + up. If you don't wait a jiffie after the final check, you will
> + screw it up. If you screw it up by these manners or by abandoning
> + an operation in progress, the I2C bus is likely stuck and won't
> + work any more. Gotta love this hardware. */
this sounds scary. Your "jiffie" in the comment, for which value of HZ
is that taken? Would you consider changing this to absolute time
instead?
next prev parent reply other threads:[~2005-02-25 14:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-25 14:26 Corey Minyard
2005-02-25 14:36 ` Arjan van de Ven [this message]
2005-02-25 15:01 ` [PATCH] I2C patch 5 - Add a non-blocking interface to the I2C core (one more time) Corey Minyard
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