| Message ID | 20180531105959.14843-1-ulf.hansson@linaro.org |
|---|---|
| Headers | show |
| Series | PM / Domains: Add support for multi PM domains per device | expand |
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!
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(-) -- 2.17.0