* Archit Taneja <archit@xxxxxx> [140420 22:16]: > Hi, > > On Friday 18 April 2014 10:48 PM, Tony Lindgren wrote: > >* Archit Taneja <archit@xxxxxx> [140416 06:20]: > >>Add DT node for the ctrl-core sub module of the DRA7 control module. We map the > >>CTRL_MODULE_CORE address region up to 0x4a002d60, this region contains register > >>fields which configure clocks. The remainder of the registers are related to > >>pad configurations or cross-bar configurations, and therefore aren't mapped. > > > >Can you please check if this can just use the existing > >regmap syscon mapping: > > > >syscon = <&dra7_ctrl_general>; > > > >See how the drivers/regulator/pbias-regulator.c is using the > >syscon to initialize a regulator and then omap_hsmmc.c just does > >the standard regulator calls. > > The thing is that this bit needs to be set before the the DSS hwmods are > reset, and that happens very early. If we don't do this, DSS won't reset > properly, and not get back to an idle state. > > I am not sure where I can configure the syscon register early enough that it > happens before the hwmods are reset. With a syscon mapping, I guess we would > access the register when the DSS driver is probed. But that's too late for > us. > > Ideally, it would be much better to have a syscon mapping. Do you have any > suggestions how this can be achieved very early in boot? It's best to move the reset and initialization of DSS happen later. I believe we already are resetting only some of the hwmods early on. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
