From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Peter Korsgaard <jacmet-OfajU3CKLf1/SzgSGea1oA@public.gmane.org>
Cc: ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Michael Lawnick <ml.lawnick-Mmb7MZpHnFY@public.gmane.org>
Subject: Re: [PATCH] i2c: add generic I2C multiplexer using gpio api
Date: Tue, 20 Jul 2010 11:50:05 +0200 [thread overview]
Message-ID: <20100720115005.3b3fa865@hyperion.delvare> (raw)
In-Reply-To: <87fwzejz1v.fsf-uXGAPMMVk8amE9MCos8gUmSdvHPH+/yF@public.gmane.org>
On Tue, 20 Jul 2010 11:13:48 +0200, Peter Korsgaard wrote:
> >>>>> "Peter" == Peter Korsgaard <peter.korsgaard-ob4gmnvZ1/cAvxtiuMwx3w@public.gmane.org> writes:
>
> Peter> Add an i2c bus driver providing virtual i2c busses using a hardware
> Peter> MUX sitting on a master bus and controlled through gpio pins.
>
> Peter> E.G. something like:
>
> Peter> ---------- ---------- Virtual bus 1 - - - - -
> Peter> | | SCL/SDA | |-------------- | |
> Peter> | |------------| |
> Peter> | | | | Virtual bus 2 | |
> Peter> | Linux | GPIO 1..N | MUX |--------------- Devices
> Peter> | |------------| | | |
> Peter> | | | | Virtual bus M
> Peter> | | | |---------------| |
> Peter> ---------- ---------- - - - - -
>
> Peter> SCL/SDA of the master I2C bus is multiplexed to virtual bus 1..M
> Peter> according to the settings of the GPIO pins 1..N.
>
> Peter> Signed-off-by: Peter Korsgaard <peter.korsgaard-ob4gmnvZ1/cAvxtiuMwx3w@public.gmane.org>
>
> Comments?
Michael and myself are in the process of adding core support for bus
multiplexing to the i2c subsystem. There is no point in reviewing more
specific implementations until the core part is merged (which is
scheduled to happen in kernel 2.6.36.)
--
Jean Delvare
next prev parent reply other threads:[~2010-07-20 9:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-04 23:19 [PATCH] i2c: add generic I2C multiplexer using gpio api Peter Korsgaard
[not found] ` <1278285584-13632-1-git-send-email-peter.korsgaard-ob4gmnvZ1/cAvxtiuMwx3w@public.gmane.org>
2010-07-20 9:13 ` Peter Korsgaard
[not found] ` <87fwzejz1v.fsf-uXGAPMMVk8amE9MCos8gUmSdvHPH+/yF@public.gmane.org>
2010-07-20 9:50 ` Jean Delvare [this message]
[not found] ` <20100720115005.3b3fa865-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2010-07-20 9:58 ` Peter Korsgaard
[not found] ` <87bpa2jwzy.fsf-uXGAPMMVk8amE9MCos8gUmSdvHPH+/yF@public.gmane.org>
2010-07-20 11:04 ` Jean Delvare
[not found] ` <20100720130417.5be0bb51-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2010-07-20 11:27 ` Peter Korsgaard
2010-07-20 11:09 ` Michael Lawnick
[not found] ` <4C4583F3.8080807-Mmb7MZpHnFY@public.gmane.org>
2010-07-20 11:29 ` Peter Korsgaard
[not found] ` <87y6d6ie7q.fsf-uXGAPMMVk8amE9MCos8gUmSdvHPH+/yF@public.gmane.org>
2010-07-20 11:51 ` Michael Lawnick
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