linux-kernel - Re: I2C Slave monitor mode support

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Message-ID: <20140718123517.GB2731@katana>
Date:	Fri, 18 Jul 2014 14:35:17 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Suneel G <suneelgarapati@...il.com>
Cc:	Jagan Teki <jagannadh.teki@...il.com>, linux-i2c@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: I2C Slave monitor mode support

> Currently, one would have to put a loop on the address transfer waiting an ack
> is received in user space.

This is what most i2c master drivers would need to do anyhow. I have
never heard of hardware support for that. Do you know an IP core which
does that? And how are timeouts defined/handled?

> This helps the app or the user software to not busy wait considering the slow
> clk of i2c.

Currently, this is not supported in Linux I2C. It probably could be
using another I2C_M_* flag, but a number of details need to be designed
and implemented first. Would you be interested?

Kind regards,

   Wolfram

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