Hi, On 08.05.2014 14:49, Tomasz Figa wrote: > Up till now there was no single generic method to bind devices to their > power domains using Device Tree. Each platform has been doing this using > its own way, example of which are Exynos power domain bindings [1] and > look-up code [2]. > > This series is intended to change this and provide generic DT bindings for > power domain specification and generic code performing look-up of power > domains and binding them to devices. > > First two patches are the most important part of this series, as they > introduce $subject. Patch 3 converts mach-exynos to use the new generic > method. Further patches are adding one more user of the new code, > mach-s3c64xx, with first 3 patches (4-6) required to clean-up its power > domain driver a bit and last 3 patches (9-11) adding display support for > Mini6410 board, including a node for display controller (FIMD) which is > a power domain consumer. > > The design of DT bindings and provider code is heavily inspired by > implementation of clock providers in Common Clock Framework, while > the code binding devices to power domains by my Exynos power domain > implementation (now removed by this series ;)). > > Successfully tested on Exynos4210-based Trats and Exynos4412-based Trats2 > boards using MFC, > > [1] Documentation/devicetree/bindings/arm/exynos/power_domain.txt > [2] arch/arm/mach-exynos/pm_domains.c > > Changes since v3: > (http://thread.gmane.org/gmane.linux.power-management.general/44571) > - rebased onto current Rafael's linux-pm bleeding-edge branch (0a112bf), > - renamed "power-domain" property to "power-domains" to facilitate further > extension to support multiple power domains per device in future. > > Changes since v2: > (http://thread.gmane.org/gmane.linux.kernel/1658926) > - rebased onto current Rafael's linux-pm bleeding-edge branch, > - dropped patches for s3c64xx for now. I will send them in separate series, > - do not call pm_genpd_dev_need_restore(true) in genpd_bind_domain(), > - fixed various stylistic issues reported in review comments. > > Changes since v1 (RFC): > [https://lkml.org/lkml/2014/1/11/141] > - rebased onto current Rafael's linux-pm bleeding-edge branch, > - reordered the patches a bit (to have the generic ones first), > - dropped renaming of S3C64xx power domains (as suggested by Mark Brown), > - added support for deferred probing (as suggested by Stephen Boyd), > - fixed several minor issues pointed by Stephen Boyd, > - replaced notifiers with direct hooks in driver core to make power domain > support independent from specific bus type and allow error handling. > > Tomasz Figa (3): > base: power: Add generic OF-based power domain look-up > drivercore: Bind/unbind power domain on probe/remove > ARM: exynos: Move to generic power domain bindings > > .../bindings/arm/exynos/power_domain.txt | 12 +- > .../devicetree/bindings/power/power_domain.txt | 51 ++++ > arch/arm/mach-exynos/pm_domains.c | 81 +----- > drivers/base/dd.c | 9 +- > drivers/base/power/domain.c | 283 +++++++++++++++++++++ > include/linux/pm_domain.h | 46 ++++ > kernel/power/Kconfig | 4 + > 7 files changed, 398 insertions(+), 88 deletions(-) > create mode 100644 Documentation/devicetree/bindings/power/power_domain.txt > Rob, Mark, could we have your ACK (or NAK if you find some issues) for DT bindings introduced by this series? Rafael, I wonder if we could still have this series applied for 3.16. I know it is a bit late already, but the series isn't too invasive, as it mostly generalizes what was being done on per-platform basis and makes the code generic. Also I have already seen at least two other series depending on this one, so they would benefit from this being merged. Best regards, Tomasz -- 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
