Add power domain drivers based on generic power domain for Rockchip platform, and support RK3288 SoCs. Verified on url = https://chromium.googlesource.com/chromiumos/third_party/kernel/+/v3.14 localhost / # cat /sys/kernel/debug/pm_genpd/pm_genpd_summary domain status slaves /device runtime status ---------------------------------------------------------------------- pd_video off /devices/ff9a0800.iommu suspended /devices/ff9a0000.video-codec suspended pd_vio on /devices/ff930300.iommu suspended /devices/ff940300.iommu suspended /devices/ff930000.vop suspended /devices/ff940000.vop suspended /devices/ff980000.hdmi unsupported /devices/rockchip-edp unsupported pd_hevc off pd_gpu off /devices/ffa30000.gpu suspended The following is the easy example. vopb: vop@ff930000 { compatible = "rockchip,rk3288-vop"; ... iommus = <&vopb_mmu>; power-domains = <&power RK3288_PD_VIO>; status = "disabled"; ... }; vopb_mmu: iommu@ff930300 { compatible = "rockchip,iommu"; ... interrupt-names = "vopb_mmu"; power-domains = <&power RK3288_PD_VIO>; #iommu-cells = <0>; status = "disabled"; ... }; vopl: vop@ff940000 { compatible = "rockchip,rk3288-vop"; reg = <0xff940000 0x19c>; ... iommus = <&vopl_mmu>; power-domains = <&power RK3288_PD_VIO>; status = "disabled"; ... }; vopl_mmu: iommu@ff940300 { compatible = "rockchip,iommu"; ... interrupt-names = "vopl_mmu"; power-domains = <&power RK3288_PD_VIO>; #iommu-cells = <0>; status = "disabled"; }; Others, we can verify this driver for the EDP. We can apply the following these patchs. 6967631 New [v2,1/8] drm: exynos/dp: fix code style 6967741 New [v2,2/8] drm: exynos/dp: convert to drm bridge mode 6967801 New [v2,3/8] drm: bridge: analogix_dp: split exynos dp driver to bridge dir 6967791 New [v2,4/8] drm: rockchip/dp: add rockchip platform dp driver 6968031 New [v2,5/8] drm: bridge/analogix_dp: add platform device type support 6968141 New [v2,6/8] drm: bridge: analogix_dp: add some rk3288 special registers setting 6967941 New [v2,7/8] drm: bridge: analogix_dp: try force hpd after plug in lookup failed 6967971 New [v2,8/8] drm: bridge/analogix_dp: expand the delay time for hpd detect There is a recent addition from Linus Walleij, called simple-mfd [a] that is supposed to get added real early for kernel 4.2 [a]: https://git.kernel.org/cgit/linux/kernel/git/linusw/linux-integrator.git/commit/?id=fcf294c020ff7ee4e3b1e96159e4dc7a17ad5 Here is my branch, Tested by chromeos-3.14 and next-kernel. 2b82899 ARM: dts: add RK3288 power-domain node 69d0b5b soc: rockchip: power-domain: support power domain driver for RK3288 SoCs 66f8758 ARM: power-domain: rockchip: add all the domain type on RK3288 SoCs c5f12a3 dt-bindings: add document of Rockchip power domain 7a834ba Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 0be0171 HID: wacom: Report correct device resolution when using the wireless adapater 2b9bea0 Merge tag 'mfd-fixes-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 016a9f5 Merge tag 'ntb-4.2-rc7' of git://github.com/jonmason/ntb a3ca013 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ...... Changes in v16: - remove the pmu node. - Add more domain decription. - the driver type from tristate to bool. - Letter misspelled. - As Ulf suggestion, remove #include <linux/clk-provider.h>, use "%pC" as the formatting string for the dev_dbg(). - As the Ulf suggestion, set the genpd->flags to assign the ->stop|start() callbacks. - Manually copy the problem in patch v15. - rebase the description. Changes in v15: - change the comment. - As the kevin suggestion, put the power-domain driver into driver/soc/vendor. - As Heiko suggestion, Patch 1: binding doc, 2: binding-header, 3: driver, 4: dts-changes. - return -ENXIO --> return -ENODEV. - As Tomasz remarked previously the dts should represent the hardware and the power-domains are part of the pmu. Changes in v14: - does not need to set an owner,remove the "THIS_MODULE". - Remove essential clocks from rk3288 PD_VIO domain, Some clocks are essential for the system health and should not be turned down. However there is no owner for them so if they listed as belonging to power domain we'll try toggling them up and down during power domain transition. As a result we either fail to suspend or resume the system. Changes in v13: - Remove essential clocks from rk3288 PD_VIO domain Some clocks are essential for the system health and should not be turned down. However there is no owner for them so if they listed as belonging to power domain we'll try toggling them up and down during power domain. - Device drivers expect their devices to be powered on before their probing code is invoked. To achieve that we should start with power domains powered on (we may turn them off later once all devices enable runtime powermanagment and go idle). - This change switches Rockchip power domain driver to use updated device_attach and device_detach API. - set the gpu/core power domain power delay time. - fix enumerating PM clocks for devices. - fix use after free We can't use clk after we did clk_put(clk). Changes in v12: - fix the title doamin->domain. - updated device_attach and device_detach API,otherwise it will compile fail on next kernel. Changes in v11: - fix pm_genpd_init(&pd->genpd, NULL, false). Changes in v10: - this switches over domain infos to use masks instead of recomputing them each time and also gets rid of custom domain translator and uses standard onecell on. - fix missing the #include <dt-bindings/power-domain/rk3288.h>. - remove the notes. Changes in v9: - add document decription. - fix v8 changes as follows: - This reconciles the v2 and v7 code so that we power domain have lists of clocks they trigger on and off during power transitions and independently from power domains clocks. We attach clocks to devices comprising power domain and prepare them so they are turn on and off by runtime PM. - add rockchip_pm_add_one_domain() to control domains. - add pd_start/pd_stop interface to control clocks. - add decription for power-doamin node. Changes in v8: - document go back to v2. - This reconciles the v2 and v7 code so that we power domain have lists of clocks they toggle on and off during power transitions and independently from power domains clocks we attach clocks to devices comprising power domain and prepare them so they are turn on and off by runtime PM. - DTS go back to v2. Changes in v7: - Delete unused variables Changes in v6: - delete pmu_lock. - modify dev_lock using mutex. - pm_clk_resume(pd->dev) change to pm_clk_resume(ed->dev). - pm_clk_suspend(pd->dev) change to pm_clk_suspend(ed->dev). - add devm_kfree(pd->dev, de) in rockchip_pm_domain_detach_dev. Changes in v5: - delete idle_lock. - add timeout in rockchip_pmu_set_idle_request(). Changes in v4: - use list storage dev. Changes in v3: - DT structure has changed. - change use pm_clk_resume() and pm_clk_suspend(). - Decomposition power-controller, changed to multiple controller (gpu-power-controller, hevc-power-controller). Changes in v2: - move clocks to "optional". - remove the "pd->pd.of_node = np". - make pd_vio clocks all one entry per line and alphabetize. - power: power-controller move back to pinctrl: pinctrl. Caesar Wang (4): dt-bindings: add document of Rockchip power domain ARM: power-domain: rockchip: add all the domain type on RK3288 SoCs soc: rockchip: power-domain: Add power domain driver ARM: dts: add the support power-domain node on RK3288 SoCs .../bindings/soc/rockchip/power_domain.txt | 46 ++ arch/arm/boot/dts/rk3288.dtsi | 60 ++- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/rockchip/Kconfig | 13 + drivers/soc/rockchip/Makefile | 4 + drivers/soc/rockchip/pm_domains.c | 485 +++++++++++++++++++++ include/dt-bindings/power-domain/rk3288.h | 31 ++ 8 files changed, 640 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/soc/rockchip/power_domain.txt create mode 100644 drivers/soc/rockchip/Kconfig create mode 100644 drivers/soc/rockchip/Makefile create mode 100644 drivers/soc/rockchip/pm_domains.c create mode 100644 include/dt-bindings/power-domain/rk3288.h -- 1.9.1 -- 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