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 S3C6410-based Mini6410 board. [1] Documentation/devicetree/bindings/arm/exynos/power_domain.txt [2] arch/arm/mach-exynos/pm_domains.c 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 (11): 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 ARM: s3c64xx: pm: Use name field of generic_pm_domain ARM: s3c64xx: pm: Add always_on field to s3c64xx_pm_domain struct ARM: s3c64xx: pm: Add pwr_stat bit for domain G ARM: s3c64xx: pm: Add device tree based power domain instantiation ARM: s3c64xx: dt: Enable SoC-level power management ARM: dts: s3c64xx: Add nodes for power domains ARM: dts: s3c64xx: Add node for display controller ARM: dts: s3c6410-mini6410: Add support for LCD screen .../bindings/arm/exynos/power_domain.txt | 12 +- .../devicetree/bindings/power/power_domain.txt | 51 ++++ arch/arm/boot/dts/s3c6400.dtsi | 1 + arch/arm/boot/dts/s3c6410-mini6410.dts | 33 +++ arch/arm/boot/dts/s3c6410.dtsi | 1 + arch/arm/boot/dts/s3c64xx.dtsi | 13 + arch/arm/mach-exynos/pm_domains.c | 80 +----- arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c | 8 + arch/arm/mach-s3c64xx/pm.c | 106 ++++++-- drivers/base/dd.c | 9 +- drivers/base/power/domain.c | 298 +++++++++++++++++++++ include/dt-bindings/arm/s3c64xx-power-domains.h | 26 ++ include/linux/pm_domain.h | 46 ++++ kernel/power/Kconfig | 4 + 14 files changed, 576 insertions(+), 112 deletions(-) create mode 100644 Documentation/devicetree/bindings/power/power_domain.txt create mode 100644 include/dt-bindings/arm/s3c64xx-power-domains.h -- 1.9.0 -- 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
