Re: [PATCH, RFC] usb: add devicetree helpers for determining dr_mode and phy_type

[Marc Kleine-Budde <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>]

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On 01/29/2013 06:11 PM, Stephen Warren wrote:
> On 01/29/2013 04:22 AM, Sascha Hauer wrote:
>> From: Michael Grzeschik <m.grzeschik-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
>>
>> This adds two little devicetree helper functions for determining the
>> dr_mode (host, peripheral, otg) and phy_type (utmi, ulpi,...) from
>> the devicetree.
>>
>> Signed-off-by: Michael Grzeschik <m.grzeschik-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
>> Signed-off-by: Marc Kleine-Budde <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
>> ---
>>
>> The properties and their values have been taken from the fsl-mph-dr driver.
>> This binding is also documented (though currently not used) for the tegra
>> ehci driver (Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt).
>> This is a first attempt to parse these bindings at a common place so that
>> others can make use of it.
>>
>> Basically I want to know whether this binding is recommended for new drivers
>> since normally the devicetree uses '-' instead of '_', and maybe there are
>> other problems with it.
> 
> It's certainly typical to use - not _ for freshly defined properties.
> However, since this property already exists and is in-use, I don't think
> there's any choice but to maintain its current definition.
> 
> The code looked fine to me.

The code for phy_type is lifted from the ethernet guys and adopted to
the usb phy types.

"dr_mode" is, as Sascha pointed out, only used in
drivers/usb/host/fsl-mph-dr-of.c

Marc

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