On 20/06/2016 at 03:16:35 +0000, Yang, Wenyou wrote : > > Sure, what I mean is that you can try to get the regmap for the SFR in every case. > > Depending on whether you were able to get it, you can decide to call > > ohci_at91_port_suspend/resume or not (just test for sfr_regmap != NULL). > > I don't think so. The SFR includes a lot of miscellaneous functions, more than this one. > I know but this is irrelevant to this discussion. If you need to use the SFR from another driver you will simply get it from that other driver. I that case, you will try to get "atmel,sama5d2-sfr". It is only present on sama5d2 so you have enough information to know whether or not you can use it to suspend/resume. -- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- 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