[PATCH v3 1/3] usb: fsl-mxc-udc: replace cpu_is_xxx() with platform_device_id
balbi at ti.com
Tue Jan 15 04:57:24 EST 2013
On Mon, Jan 14, 2013 at 06:54:22PM +0100, Marc Kleine-Budde wrote:
> On 01/14/2013 06:40 PM, Felipe Balbi wrote:
> > Hi,
> > On Mon, Jan 14, 2013 at 08:56:33PM +0800, Peter Chen wrote:
> > <snip>
> >>>> Usually there isn't any Changelog between IP cores used in the different
> >>>> fsl processors (at least available outside of fsl), that makes it quite
> >>>> difficult to say if something found on one imx is really the same as on
> >>>> the other one. And they (usually) don't provide any versioning
> >>>> information in a register or the documentation.
> >>>> just my 2¢
> >>> $SUBJECT is trying to differentiate a single feature (or maybe two) to
> >>> replace cpu_is_xxx(), then expose that on driver_data without creating
> >>> one enum value for each release from fsl.
> >> Felipe, every one or two SoCs may have their special operations for
> >> integrate PHY interface, clk operation, or workaround for IC
> >> limitation.
> > the particular PHY and clk used should be hidden by phy layer and clk
> > API respectively. Workarounds, fair enough, we need to handle them; but
> > ideally those should be based on runtime revision detection, not some
> > hackery using driver_data.
> If this is actually possible, I'd love to do this. But IP vendor don't
> include a version register in their cores. :(
then fair enough, driver_data or platform_data is the way to go, still
my point (a) below is valid.
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