On Monday 13 January 2014, Feng Kan wrote: > FKAN: I could remove this dts node and create another dts node that > describe the range of registers on the SCU and use that node in this driver. > I am not sure which subsystem I can use to handle this case, I do see a reset > subsystem in the kernel but more used for ip resets. Please kindly let > me know. Thanks for the great feedback. Is this related to the standard ARM SCU that manages multiprocessor systems, or a different unit that uses the same name? Since this is a global register range with a variety of things in it, the best candidate IMHO would be to use the "syscon" driver. You can mark the device node as 'compatible="apm,xgene-scu","syscon"' to let it get picked up by the drivers/mfd/syscon driver, which creates a "regmap" structure for it. The reset driver then uses a DT reference with a phandle to the SCU node and calls syscon_regmap_lookup_by_phandle() to get the regmap. It can get the register number inside the regmap from DT as well and use the regmap API to perform the reset. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
