On Thursday, May 31, 2018 12:59:54 PM CEST Ulf Hansson wrote: > Changes in v3: > - Drop patch 1->4 as they have already been applied. > - Collected tags, for tests and reviews. > - Minor update to function descriptions in patch 4 (earlier 8) and 5 > (earlier9). > - Note, because of the minor changes, no history is provided per patch. > > Changes in v2: > - Addressed comments from Geert around DT doc. > - Addressed comments from Jon around clarification of how to use this > and changes to returned error codes. > - Fixed build error in case CONFIG_PM was unset. > > There are devices that are partitioned across multiple PM domains. Currently > these can't be supported well by the available PM infrastructures we have in > the kernel. This series is an attempt to address this. > > One existing case where devices are partitioned across multiple PM domains, is > the Nvida Tegra 124/210 X-USB subsystem. A while ago Jon Hunter (Nvidia) sent a > series, trying to address these issues, however this is a new approach, while > it re-uses the same concepts from DT point of view. > > The Tegra 124/210 X-USB subsystem contains of a host controller and a device > controller. Each controller have its own independent PM domain, but are being > partitioned across another shared PM domain for the USB super-speed logic. > > Currently to make the drivers work, either the related PM domains needs to stay > powered on always or the PM domain topology needs to be in-correctly modelled > through sub-domains. In both cases PM domains may be powered on while they > don't need to be, so in the end this means - wasting power -. > > As stated above, this series intends to address these problem from a PM > infrastructure point of view. More details are available in each changelog. > > Kind regards > Ulf Hansson > > Ulf Hansson (5): > PM / Domains: dt: Allow power-domain property to be a list of > specifiers > PM / Domains: Don't attach devices in genpd with multi PM domains > PM / Domains: Split genpd_dev_pm_attach() > PM / Domains: Add support for multi PM domains per device to genpd > PM / Domains: Add dev_pm_domain_attach_by_id() to manage multi PM > domains > > .../bindings/power/power_domain.txt | 19 ++- > drivers/base/power/common.c | 43 +++++- > drivers/base/power/domain.c | 134 +++++++++++++++--- > include/linux/pm_domain.h | 15 ++ > 4 files changed, 183 insertions(+), 28 deletions(-) > > Applied, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
