On Tue, Nov 5, 2013 at 11:06 AM, Vivek Gautam <gautamvivek1987@xxxxxxxxx> wrote: > Hi Tomasz, Sorry my mail client had some problem, so forwarding this again. > > On Nov 4, 2013 5:59 PM, "Tomasz Figa" <t.figa@xxxxxxxxxxx> wrote: >> >> Hi Kishon, >> >> On Monday 04 of November 2013 12:24:42 Kishon Vijay Abraham I wrote: >> > Hi Vivek, >> > >> > On Thursday 31 October 2013 01:15 PM, Vivek Gautam wrote: >> > > Add a new driver for the USB 3.0 PHY on Exynos5 series of SoCs. >> > > The new driver uses the generic PHY framework and will interact >> > > with DWC3 controller present on Exynos5 series of SoCs. >> > >> > In Exynos, you have a single IP that supports both USB3 and USB2 PHY >> > right? I think that needs to be mentioned here. >> >> Nope. There are two separate, different IPs. > > AFAICS the dwc3 controller (aka usb 3.0 drd controller, as mentioned in > exynos5 UM) uses a combo of usb 2 (utmi+) and usb 3 (pipe 3) phy (with base > address starting 0x12100000), thereby giving the driver only freedom to > control them as one. The entire set of registers with base 0x12100000 for > exynos5250 and later 0x12500000 for exynos5420 are being programmed by this > driver. That's the reason i structured the driver this way, and thereby it > makes the dwc3 controller to just use only single phy. > Please correct me if i am wrong. > >> >> > Do you have separate registers that should be used for >> > initializing/powerin_on/powering_off etc.. for usb2 phy and usb3 phy? If >> > so, then you should model this driver as a single driver that supports >> > two PHYs similar to what Sylwester has done before? >> >> Sylwester's MIPI PHY uses such model because it has a single register >> that controls both PHYs. >> >> Best regards, >> Tomasz >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ -- Best Regards Vivek Gautam Samsung R&D Institute, Bangalore India -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
