linux-kernel - Re: [RFC PATCH] slimbus: Linux driver framework for SLIMbus.

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Date:	Tue, 16 Aug 2011 11:13:18 -0600
From:	Kenneth Heitke <kheitke@...eaurora.org>
To:	Arnd Bergmann <arnd@...db.de>
CC:	David Brown <davidb@...eaurora.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	bryanh@...eaurora.org, linux-arm-msm@...r.kernel.org,
	Sagar Dharia <sdharia@...eaurora.org>, rdunlap@...otime.net,
	rmk+kernel@....linux.org.uk, john.stultz@...aro.org,
	akpm@...ux-foundation.org, ohad@...ery.com, gregkh@...e.de,
	stefanr@...6.in-berlin.de, lethal@...ux-sh.org,
	linville@...driver.com, zajec5@...il.com,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] slimbus: Linux driver framework for SLIMbus.

On 08/16/2011 08:32 AM, Arnd Bergmann wrote:
> On Tuesday 16 August 2011, David Brown wrote:
>> On Tue, Aug 16, 2011 at 03:37:28PM +0200, Arnd Bergmann wrote:
>
>>> This is theoretically true, but IIRC David mentioned that the bus is
>>> only present on few SoCs and has since been abandoned in favor of standard
>>> busses for new devices.
>>
>> Actually, this is a different one than the one I was mentioning at the
>> Linaro Connect.  I believe SLIMbus is more active
>> http://en.wikipedia.org/wiki/SLIMbus
>>
>> The other bus I was mentioning is called SSBI, which as far as I know
>> is only used to communicate between MSMs and certain Qualcomm
>> peripheral chips.
>
> Thanks for the clarification! I assumed these were the same thing because
> the patches were posted just after we had talked about the other one.
>
>> Kenneth would better be able to clarify how dynamic the SLIMbus is.
>
> That would definitely be helpful. Also, I'd be very interested to hear
> what kind of device probing is available on slimbus. If Mark was
> right about devices being discoverable, we need don't need any board
> description (dts or hardcoded) but instead a way to match the devices
> to drivers based on their HW ID.
>
> 	Arnd
>

SLIMbus is a MIPI standard bus primarily used for digital audio devices. 
  The devices on the bus SLIMbus enumerate themselves by sending an 
IDENTITY message.  I'll let Sagar clarify further.

thanks,
Ken


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