From: Eric Anholt <eric@anholt.net>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Stephen Warren <swarren@wwwdotorg.org>,
Lee Jones <lee@kernel.org>,
linux-i2c@vger.kernel.org
Subject: Re: [PATCH] i2c: bcm2835: Set up the clock stretching timeout at boot.
Date: Sun, 03 Jul 2016 18:02:32 -0700 [thread overview]
Message-ID: <87lh1ip653.fsf@eliezer.anholt.net> (raw)
In-Reply-To: <20160704003118.GA1381@tetsubishi>
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Wolfram Sang <wsa@the-dreams.de> writes:
>> + /*
>> + * SMBUS says "Devices participating in a transfer will
>> + * timeout when any clock low exceeds the value of
>> + * T_TIMEOUT,MIN of 25 ms."
>> + */
>
> SMBus has that timeout, but I2C doesn't. How about disabling the timeout
> simply? Or using the max value if you want to keep the timeout
> detection?
Disabling the timeout seems fine to me. We still have a 1-second
timeout around the entire transfer. I'll be back on my DSI branch this
week and test it out then.
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next prev parent reply other threads:[~2016-07-04 1:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-01 22:07 Eric Anholt
2016-06-02 16:35 ` Stefan Wahren
[not found] ` <25336b03-76d1-2466-fbc0-9f363d3e7638@i2se.com>
2016-06-02 18:02 ` Eric Anholt
2016-07-04 0:31 ` Wolfram Sang
2016-07-04 1:02 ` Eric Anholt [this message]
2016-07-22 7:27 ` Wolfram Sang
2016-10-03 19:50 ` Eric Anholt
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