On Wed, Aug 07, 2013 at 02:28:20PM +0200, Michael Grzeschik wrote: > Hi Peter, > > On Wed, Aug 07, 2013 at 05:24:45PM +0800, Peter Chen wrote: > > On Wed, Aug 07, 2013 at 12:05:07PM +0200, Sascha Hauer wrote: > > > > > > > > We need to know controller number, like pdev->id in the past. > > > > The registers at non core register is messy, the specific bit > > > > is for specific controller. > > > > > > The controller number is present in the old binding: > > > > > > fsl,usbmisc = <&usbmisc 1>; > > > ^^^ > > > > > > Merging the usbmisc stuff into the imx driver shouldn't be a reason to > > > change this binding. > > > > > > Please get used to the fact that dt bindings cannot be changed easily > > > just because the newer binding looks nicer. They define an ABI and > > > breaking this ABI causes pain. > > > > > > > But current situation is the device node of "usbmisc" will not be needed. > > The usbmisc will not be a driver. We only need usbmisc to supply kinds > > of SoC specific implementations, as well as filling the content of the data > > at struct of_device_id (imx-usb's). > > > > > > > > > > > > - When usbmisc_imx is a device, the register maps only one time. > > > > > > But ci_hdrc_imx will be several devices, the non-core register > > > > > > will be mapped several times, we have to use syscon to visit one register > > > > > > region among several devices. > > > > > > > > > > Converting the imx-usb misc driver to regmap is fine, but I see no > > > > > reason to not make this a separate patch. This would make this much > > > > > easier to read. > > > > > > > > You mean delete "reg" entry at usbmisc dts, and using noncore phandle > > > > at usbmisc_imx.c as the first patch, then, convert driver as separate > > > > file. > > > > > > I mean: create a patch which converts the usbmisc driver to regmap and > > > base your other stuff on this patch. > > > > > > > This is what I mean. We can't request one region twice, so we need to > > delete devm_ioremap_resource at probe first. > > Please try to reply with your answers in direct context to the questions. > Otherwise this thread will not end and probably produce more confusion than > answers. What we need is a clearly seperated series of independent changes; > Just like Sascha already mentioned: > > On Wed, Aug 07, 2013 at 10:15:22AM +0200, Sascha Hauer wrote: > > This patch does far too many things at once. > > > > - Convert imx-usb-misc from a driver into something which is called > > directly > > - add aliases > > - change devicetree bindings (which causes pain and it's not explained why > > this is necessary at all) > > - converts the misc stuff to regmap > > > > Please split this up so that it can be reviewed. > > Your work needs the clean seperation before we can discuss the changes more in > detail. Please try that first! > Thanks, Michael. I will do that. But discussion is needed, it can let us understand the problem deeply. For you, what the real problem, for me, how to do it properly. -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
