Hi Caesar, thanks for keeping this alive :-) Am Freitag, 24. April 2015, 16:07:45 schrieb Caesar Wang: > Add power domain drivers based on generic power domain for > Rockchip platform, and support RK3288. > > Verified on url = > https://chromium.googlesource.com/chromiumos/third_party/kernel. > > At the moment,there are mass of products are using the driver. > I believe the driver can happy work for next kernel. I've taken a look at the driver and here are some global remarks: (1) You provide dt-bindings/power-domain/rk3288.h in patch 3. This breaks bisectability, as the driver itself in patch 2 also includes the header and would thus fail to compile if the later patch 3 is missing. Ideally I think the header addition should be a separate patch itself, so that we can possibly share it between driver and dts branches. So 1: binding doc, 2: binding-header, 3: driver, 4: dts-changes. (2) The dts-changes in patch 3 should also add any necessary power-domain assignment on devices if they're still missing, so that we don't introduce regressions. In my case my work-in-progress edp died because the powerdomain was turned off automatically it seems. (3) more like wondering @Kevin or so, is there some more generic place for a power-domain driver nowadays? (4) As Tomasz remarked previously the dts should represent the hardware and the power-domains are part of the pmu. There is a recent addition from Linus Walleij, called simple-mfd [a] that is supposed to get added real early for kernel 4.2. So I'd think the power-domains should use that and the patchset modified to include the changes shown below [b]? (5) Keven Hilman and Tomasz had reservations about all the device clocks being listed in the power-domains itself in the previous versions. I don't see a comment from them yet changing that view. Their wish was to get the clocks by reading the clocks from the device nodes, though I see a problem on how to handle devices that do not have any bindings at all yet. Kevin, Tomasz any new thoughts? Heiko [a] https://git.kernel.org/cgit/linux/kernel/git/linusw/linux-integrator.git/commit/?h=simple-mfd&id=fcf294c020ff7ee4e3b1e96159e4dc7a17ad59d1 [b] Subject: [PATCH] make power-domains a child of the pmu This should of course be distributed across the original patches and not be a separate patch. --- arch/arm/boot/dts/rk3288.dtsi | 118 ++++++++++++++++++------------------ arch/arm/mach-rockchip/pm_domains.c | 11 +++- 2 files changed, 67 insertions(+), 62 deletions(-) diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi index 9696f51..b9ba79013 100644 --- a/arch/arm/boot/dts/rk3288.dtsi +++ b/arch/arm/boot/dts/rk3288.dtsi @@ -549,8 +549,66 @@ }; pmu: power-management@ff730000 { - compatible = "rockchip,rk3288-pmu", "syscon"; + compatible = "rockchip,rk3288-pmu", "syscon", "simple-mfd"; reg = <0xff730000 0x100>; + + power: power-controller { + compatible = "rockchip,rk3288-power-controller"; + #power-domain-cells = <1>; + rockchip,pmu = <&pmu>; + #address-cells = <1>; + #size-cells = <0>; + + pd_gpu { + reg = <RK3288_PD_GPU>; + clocks = <&cru ACLK_GPU>; + }; + + pd_hevc { + reg = <RK3288_PD_HEVC>; + clocks = <&cru ACLK_HEVC>, + <&cru SCLK_HEVC_CABAC>, + <&cru SCLK_HEVC_CORE>, + <&cru HCLK_HEVC>; + }; + + pd_vio { + reg = <RK3288_PD_VIO>; + clocks = <&cru ACLK_IEP>, + <&cru ACLK_ISP>, + <&cru ACLK_RGA>, + <&cru ACLK_VIP>, + <&cru ACLK_VOP0>, + <&cru ACLK_VOP1>, + <&cru DCLK_VOP0>, + <&cru DCLK_VOP1>, + <&cru HCLK_IEP>, + <&cru HCLK_ISP>, + <&cru HCLK_RGA>, + <&cru HCLK_VIP>, + <&cru HCLK_VOP0>, + <&cru HCLK_VOP1>, + <&cru PCLK_EDP_CTRL>, + <&cru PCLK_HDMI_CTRL>, + <&cru PCLK_LVDS_PHY>, + <&cru PCLK_MIPI_CSI>, + <&cru PCLK_MIPI_DSI0>, + <&cru PCLK_MIPI_DSI1>, + <&cru SCLK_EDP_24M>, + <&cru SCLK_EDP>, + <&cru SCLK_HDMI_CEC>, + <&cru SCLK_HDMI_HDCP>, + <&cru SCLK_ISP_JPE>, + <&cru SCLK_ISP>, + <&cru SCLK_RGA>; + }; + + pd_video { + reg = <RK3288_PD_VIDEO>; + clocks = <&cru ACLK_VCODEC>, + <&cru HCLK_VCODEC>; + }; + }; }; sgrf: syscon@ff740000 { @@ -1316,62 +1374,4 @@ }; }; }; - - power: power-controller { - compatible = "rockchip,rk3288-power-controller"; - #power-domain-cells = <1>; - rockchip,pmu = <&pmu>; - #address-cells = <1>; - #size-cells = <0>; - - pd_gpu { - reg = <RK3288_PD_GPU>; - clocks = <&cru ACLK_GPU>; - }; - - pd_hevc { - reg = <RK3288_PD_HEVC>; - clocks = <&cru ACLK_HEVC>, - <&cru SCLK_HEVC_CABAC>, - <&cru SCLK_HEVC_CORE>, - <&cru HCLK_HEVC>; - }; - - pd_vio { - reg = <RK3288_PD_VIO>; - clocks = <&cru ACLK_IEP>, - <&cru ACLK_ISP>, - <&cru ACLK_RGA>, - <&cru ACLK_VIP>, - <&cru ACLK_VOP0>, - <&cru ACLK_VOP1>, - <&cru DCLK_VOP0>, - <&cru DCLK_VOP1>, - <&cru HCLK_IEP>, - <&cru HCLK_ISP>, - <&cru HCLK_RGA>, - <&cru HCLK_VIP>, - <&cru HCLK_VOP0>, - <&cru HCLK_VOP1>, - <&cru PCLK_EDP_CTRL>, - <&cru PCLK_HDMI_CTRL>, - <&cru PCLK_LVDS_PHY>, - <&cru PCLK_MIPI_CSI>, - <&cru PCLK_MIPI_DSI0>, - <&cru PCLK_MIPI_DSI1>, - <&cru SCLK_EDP_24M>, - <&cru SCLK_EDP>, - <&cru SCLK_HDMI_CEC>, - <&cru SCLK_HDMI_HDCP>, - <&cru SCLK_ISP_JPE>, - <&cru SCLK_ISP>, - <&cru SCLK_RGA>; - }; - - pd_video { - reg = <RK3288_PD_VIDEO>; - clocks = <&cru ACLK_VCODEC>, - <&cru HCLK_VCODEC>; - }; - }; }; diff --git a/arch/arm/mach-rockchip/pm_domains.c b/arch/arm/mach-rockchip/pm_domains.c index 92d2569..f3d87c21 100644 --- a/arch/arm/mach-rockchip/pm_domains.c +++ b/arch/arm/mach-rockchip/pm_domains.c @@ -377,6 +377,7 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct device_node *node; + struct device *parent; struct rockchip_pmu *pmu; const struct of_device_id *match; const struct rockchip_pmu_info *pmu_info; @@ -410,9 +411,13 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev) pmu->genpd_data.domains = pmu->domains; pmu->genpd_data.num_domains = pmu_info->num_domains; - node = of_parse_phandle(np, "rockchip,pmu", 0); - pmu->regmap = syscon_node_to_regmap(node); - of_node_put(node); + parent = dev->parent; + if (!parent) { + dev_err(dev, "no parent for syscon LED\n"); + return -ENODEV; + } + + pmu->regmap = syscon_node_to_regmap(parent->of_node); if (IS_ERR(pmu->regmap)) { error = PTR_ERR(pmu->regmap); dev_err(dev, "failed to get PMU regmap: %d\n", error); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
