[...] > > > > I'm creating platform device for the clocks that require DVFS. These > > clocks don't use regulator, they are attached to the CORE domain. > > GENPD framework manages the performance state, aggregating perf votes > > from each device, i.e. from each clock individually. > > > > You want to reinvent another layer of aggregation on top of GENPD. > > This doesn't worth the effort, we won't get anything from it, it > > should be a lot of extra complexity for nothing. We will also lose > > from it because pm_genpd_summary won't show you a per-device info. > > > > domain status children performance > > /device runtime status > > ---------------------------------------------------------------------------------------------- > > heg on 1000000 > > /devices/soc0/50000000.host1x active 1000000 > > /devices/soc0/50000000.host1x/54140000.gr2d suspended 0 > > mpe off-0 0 > > vdec off-0 0 > > /devices/soc0/6001a000.vde suspended 0 > > venc off-0 0 > > 3d1 off-0 0 > > /devices/genpd:1:54180000.gr3d suspended 0 > > 3d0 off-0 0 > > /devices/genpd:0:54180000.gr3d suspended 0 > > core-domain on 1000000 > > 3d0, 3d1, venc, vdec, mpe, heg > > /devices/soc0/7d000000.usb active 1000000 > > /devices/soc0/78000400.mmc active 950000 > > /devices/soc0/7000f400.memory-controller unsupported 1000000 > > /devices/soc0/7000a000.pwm active 1000000 > > /devices/soc0/60006000.clock/tegra_clk_pll_c active 1000000 > > /devices/soc0/60006000.clock/tegra_clk_pll_e suspended 0 > > /devices/soc0/60006000.clock/tegra_clk_pll_m active 1000000 > > /devices/soc0/60006000.clock/tegra_clk_sclk active 1000000 > > > > I suppose if there's really no good way of doing this other than > providing a struct device, then so be it. I think the cleaned up sysfs > shown in the summary above looks much better than what the original > would've looked like. > > Perhaps an additional tweak to that would be to not create platform > devices. Instead, just create struct device. Those really have > everything you need (.of_node, and can be used with RPM and GENPD). As I > mentioned earlier, platform device implies a CPU-memory-mapped bus, > which this clearly isn't. It's kind of a separate "bus" if you want, so > just using struct device directly seems more appropriate. Just a heads up. If you don't use a platform device or have a driver associated with it for probing, you need to manage the attachment to genpd yourself. That means calling one of the dev_pm_domain_attach*() APIs, but that's perfectly fine, ofcourse. > > We did something similar for XUSB pads, see drivers/phy/tegra/xusb.[ch] > for an example of how that was done. I think you can do something > similar here. > > Thierry Kind regards Uffe
