linux-kernel - Re: I2C Slave monitor mode support

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Message-ID: <20140617121912.GA2683@katana>
Date:	Tue, 17 Jun 2014 14:19:12 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Jagan Teki <jagannadh.teki@...il.com>
Cc:	linux-i2c@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: I2C Slave monitor mode support


> Few of the I2C interfaces are [operated] with slave monitor mode, when
> there is a requirement for
> a particular slave may need to wait some time to get the ADDR before
> sending an ACK.

Can you describe an existing scenario? Why can't the slave use clock
stretching?

> This feature is an optional and defined in few of the controllers, Can
> anyone tell me is this support is
> added already in kernel, if yes please point to the respective driver
> or code link.

None that I know of. The above questions should help me understand why
it is needed on master driver level at all.


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