linux-kernel - Re: [PATCH v7 0/9] Generic PHY Framework

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Date:	Mon, 17 Jun 2013 12:16:35 +0200
From:	Sylwester Nawrocki <s.nawrocki@...sung.com>
To:	Kishon Vijay Abraham I <kishon@...com>
Cc:	grant.likely@...aro.org, tony@...mide.com, balbi@...com,
	arnd@...db.de, swarren@...dia.com, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-usb@...r.kernel.org, gregkh@...uxfoundation.org,
	akpm@...ux-foundation.org, rob.herring@...xeda.com,
	rob@...dley.net, b-cousson@...com, linux@....linux.org.uk,
	benoit.cousson@...aro.org, mchehab@...hat.com, cesarb@...arb.net,
	davem@...emloft.net, rnayak@...com, shawn.guo@...aro.org,
	santosh.shilimkar@...com, devicetree-discuss@...ts.ozlabs.org,
	linux-doc@...r.kernel.org, nsekhar@...com
Subject: Re: [PATCH v7 0/9] Generic PHY Framework

Hi,

On 06/13/2013 10:43 AM, Kishon Vijay Abraham I wrote:
> Added a generic PHY framework that provides a set of APIs for the PHY drivers
> to create/destroy a PHY and APIs for the PHY users to obtain a reference to
> the PHY with or without using phandle.
> 
> This framework will be of use only to devices that uses external PHY (PHY
> functionality is not embedded within the controller).
> 
> The intention of creating this framework is to bring the phy drivers spread
> all over the Linux kernel to drivers/phy to increase code re-use and to
> increase code maintainability.
> 
> Comments to make PHY as bus wasn't done because PHY devices can be part of
> other bus and making a same device attached to multiple bus leads to bad
> design.
> 
> If the PHY driver has to send notification on connect/disconnect, the PHY
> driver should make use of the extcon framework. Using this susbsystem 
> to use extcon framwork will have to be analysed.
> 
> Making omap-usb2 and twl4030 to use this framework is provided as a sample.
> 
> This patch series is developed on linux mainline tree.
> 
> Changes from v6
> * corrected few typos in Documentation
> * Changed PHY Subsystem to *bool* in Kconfig (to avoid compilation errors when
>   PHY Subsystem is kept as module and the dependent modules are built-in)
> * Added if pm_runtime_enabled check before runtime pm calls.

Looks good, feel free to add:

Reviewed-by: Sylwester Nawrocki <s.nawrocki@...sung.com> for patches
1...3/9, 5...7/9

and Tested-by: Sylwester Nawrocki <s.nawrocki@...sung.com> for patch 1/9

Hopefully we can gather more Acks and merge it for 3.11.

I have already used this API for our MIPI CSI-2/DSIM DPHYs driver,
the RFC patch series can be found at [1].

Thanks,
Sylwester

[1] http://www.spinics.net/lists/arm-kernel/msg251666.html
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