linux-kernel - Re: [PATCH 1/6] usb: dwc3-omap: use of_platform API to create dwc3 core pdev

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Date:	Mon, 1 Oct 2012 11:50:52 +0300
From:	Felipe Balbi <balbi@...com>
To:	"ABRAHAM, KISHON VIJAY" <kishon@...com>
Cc:	balbi@...com, grant.likely@...retlab.ca, rob.herring@...xeda.com,
	rob@...dley.net, linux-usb@...r.kernel.org,
	linux-omap@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, gregkh@...uxfoundation.org
Subject: Re: [PATCH 1/6] usb: dwc3-omap: use of_platform API to create dwc3
 core pdev

Hi,

On Fri, Sep 28, 2012 at 07:01:04PM +0530, ABRAHAM, KISHON VIJAY wrote:
> Hi,
> 
> On Fri, Sep 28, 2012 at 6:27 PM, Felipe Balbi <balbi@...com> wrote:
> > Hi,
> >
> > On Fri, Sep 28, 2012 at 06:23:10PM +0530, Kishon Vijay Abraham I wrote:
> >> Used of_platform_populate() to populate dwc3 core platform_device
> >> from device tree data. Since now the allocation of unique device id is
> >> handled be of_*, removed the call to dwc3_get_device_id.
> >>
> >> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> >
> > I think it's best if you split the use of device_for_each_child() from
> > this patch. So first do the device_for_each_child() part, then later use
> > of_platform_populate().
> 
> I think it's better to have it both together as of_platform_populate
> will create the device and the device_for_each_child() part will
> delete it on error conditions and during driver removal.
> In this patch the first device_for_each_child() comes in error
> condition and it is not needed if we have not created the device using
> of_platform_populate.

We are already parent of a device and we already handle child removal
manually. You can change the current implementation to use
device_for_each_child() and on a later patch introduce
of_platform_populate().

-- 
balbi

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