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. :( >> Maybe, it will add more future or SoCs (maybe not for this driver) in >> the future, using enum is easier than string comparison for expanding >> something. > > a) I never told you to *not* use enum. I said that creating DEVICE_A, > DEVICE_B, DEVICE_C, DEVICE_D and DEVICE_E values when DEVICE_B, > DEVICE_C and DEVICE_E behave exactly the same is unnecessary. > > b) you can't be expecting to add future SoCs support to fsl udc, I have > already said and will repeat for the last time: move to chipidea ASAP. > > New SoCs cannot be added to fsl udc, you *must* use chipidea for > anything new and move the legacy to chipidea eventually. I will wait for > a full year for you to do that, but after that I will have to start > deleting drivers for the sake of avoid duplication of effort. +1 Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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