Hi all, Dne sreda, 21. marec 2018 ob 03:18:13 CET je Icenowy Zheng napisal(a): > 于 2018年3月21日 GMT+08:00 上午2:46:46, Maxime Ripard <maxime.ripard@xxxxxxxxxxx> 写到: > >On Sat, Mar 17, 2018 at 01:53:49AM +0800, Icenowy Zheng wrote: > >> All the sub-blocks of Allwinner A64 DE2 needs the SRAM C on A64 SoC > > > >to > > > >> be claimed, otherwise the whole DE2 space is inaccessible. > >> > >> Add a device tree binding of the DE2 part as a sub-bus. > > > >Where did you get the info that it was a bus? > > There's no direct evidence, just some guess. > > The DE2 is a whole part that is just allocated a memory > space at the user manual, and the SRAM controls the > access to all modules in the DE2. > > So it might be a bus. > > Implement it as a bus is a clear representation on A64. Since there is already syscon for same mmio region, we migh as well use it when loading ccu-sun8i-de2 driver on A64. Other options, like SRAM driver or bus driver, might better represent HW, but then we would have two DT nodes covering same mmio region, which I think is not really acceptable. Any suggestions? BTW, H6 has same design in this regard. Best regards, Jernej -- 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
