Hi Arnd, On 19/03/12 22:30, Arnd Bergmann wrote: > There is already a driver for the isp1301 otg part in the kernel, I don't > think we want to add another one. > > From what I can tell, this shares a common ancestry with the omap version > but has diverged quite a bit. The best solution would really be to > bring the two back together and let them share a common base driver, > with the lpc32xx and omap specific bits in another file. Yes, it's a good idea to share code where possible and consolidate into one driver. Please consider: The LPC32xx driver is actually using only 3 functions via isp1301: isp1301_udc_configure() isp1301_set_powerstate() isp1301_pullup_set() The first of those is LPC32xx specific. The power setting function is also done differently in isp1301_omap's power_up()/power_down() ("board specific"). For the pullups, there is not (yet?) a dedicated API in the OMAP driver, but it's really only two small I2C commands. Are you still sure it's worth it to use a common driver when there is hardly shared code? Maybe the right thing is a common low-level isp1301 interface defining all the registers and providing low-level (I2C) access functions, leaving all the "higher level"/"board specific" functions up to the existing drivers? (I guess you meant drivers/usb/otg/isp1301_omap.c ?) Thanks in advance, Roland -- 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