linux-kernel - Re: [PATCH V2 1/6] SLIMbus: Device management on SLIMbus

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Date:	Thu, 18 Jun 2015 22:39:16 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Sagar Dharia <sdharia@...eaurora.org>, gregkh@...uxfoundation.org,
	bp@...e.de, poeschel@...onage.de, treding@...dia.com,
	broonie@...nel.org, gong.chen@...ux.intel.com,
	andreas.noever@...il.com, alan@...ux.intel.com,
	mathieu.poirier@...aro.org, daniel@...ll.ch, oded.gabbay@....com,
	jkosina@...e.cz, sharon.dvir1@...l.huji.ac.il, joe@...ches.com,
	davem@...emloft.net, james.hogan@...tec.com,
	michael.opdenacker@...e-electrons.com, daniel.thompson@...aro.org,
	linux-kernel@...r.kernel.org
CC:	nkaje@...eaurora.org, kheitke@...ience.com, mlocke@...eaurora.org,
	agross@...eaurora.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH V2 1/6] SLIMbus: Device management on SLIMbus



On 17/06/15 02:45, Sagar Dharia wrote:
> SLIMbus (Serial Low Power Interchip Media Bus) is a specification
> developed by MIPI (Mobile Industry Processor Interface) alliance.
> SLIMbus is a 2-wire implementation, which is used to communicate with
> peripheral components like audio-codec.
> SLIMbus uses Time-Division-Multiplexing to accommodate multiple data
> channels, and control channel. Control channel has messages to do
> device-enumeration, messages to send/receive control-data to/from
> slimbus devices, messages for port/channel management, and messages to
> do bandwidth allocation.
> The framework supports multiple instances of the bus (1 controller per
> bus), and multiple slave devices per controller.
>
> This patch does device enumeration, logical address assignment,
> informing device when the device reports present/absent etc.
> Reporting present may need the driver to do the needful (e.g. turning
> on voltage regulators powering the device). So probe is called
> if the device is added to board-info list for a controller.
> Additionally device is probed when it reports present if that device
> doesn't need any such steps mentioned above.
>
> Signed-off-by: Sagar Dharia <sdharia@...eaurora.org>

I think I was not as fast as you sent the v2 :-)
However my comments on v1 patcset mostly still applies to v2 as well.

--srini
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