On Mon, Aug 18, 2014 at 05:00:59PM +0800, Peter Chen wrote: > On Sat, Aug 16, 2014 at 05:38:30PM +0200, Philippe Reynes wrote: > > Hi all, > > > > i.MX27's usb needs three clocks (usb_ipg_gate, usb_ahb_gate and usb_div) > > but the current chipidea driver implementation, and devicetree, provides > > only ipg and ahb. Consequently, if the bootloader don't enable the last > > one, the kernel will crash. > > > > Our approach/idea is to add a second, optionnal, clock in ci_hdrc_imx.c > > with 'per' name in devicetree and to add clock name 'main_clk' for > > mandatory clock. > > This approach it correct? Or an other approach seems better? > > Thank you very much for your point of view. > > > > It is ok for me to have ipg, ahb and per clocks at driver, but how can you > maintain > DT consistent?
Adding new clock as optional one will just maintain the DT compatibility. > Can you accept open ipg and per always on at clock.c? No, usb driver should manage its clocks. Shawn -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
