On Thu, 21 Apr 2016 22:24:09 +0200 Heiko Stübner <heiko@xxxxxxxxx> wrote: > Am Donnerstag, 21. April 2016, 12:30:18 schrieb Marc Zyngier: > > On Thu, 21 Apr 2016 18:47:20 +0800 > > > > "Huang, Tao" <huangtao@xxxxxxxxxxxxxx> wrote: > > > Hi, Mark: > > > > > > On 2016年04月21日 18:19, Mark Rutland wrote: > > > > On Thu, Apr 21, 2016 at 11:58:12AM +0800, Jianqun Xu wrote: > > > >> + cpu_l0: cpu@0 { > > > >> + device_type = "cpu"; > > > >> + compatible = "arm,cortex-a53", "arm,armv8"; > > > >> + reg = <0x0 0x0>; > > > >> + enable-method = "psci"; > > > >> + #cooling-cells = <2>; /* min followed by max */ > > > >> + clocks = <&cru ARMCLKL>; > > > >> + }; > > > >> + cpu_b0: cpu@100 { > > > >> + device_type = "cpu"; > > > >> + compatible = "arm,cortex-a72", "arm,armv8"; > > > >> + reg = <0x0 0x100>; > > > >> + enable-method = "psci"; > > > >> + #cooling-cells = <2>; /* min followed by max */ > > > >> + clocks = <&cru ARMCLKB>; > > > >> + }; > > > >> + > > > >> + arm-pmu { > > > >> + compatible = "arm,armv8-pmuv3"; > > > >> + interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>; > > > >> + }; > > > > > > > > This is wrong, and must go. There should be a separate node for the PMU > > > > of each microarchitecture, with the appropriate compatible string to > > > > represent that (see the juno dts). > > > > > > You are right. The first version we wrote is: > > > pmu_a53 { > > > > > > compatible = "arm,cortex-a53-pmu"; > > > interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>; > > > interrupt-affinity = <&cpu_l0>, > > > > > > <&cpu_l1>, > > > <&cpu_l2>, > > > <&cpu_l3>; > > > > > > }; > > > > > > pmu_a72 { > > > > > > compatible = "arm,cortex-a72-pmu"; > > > interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>; > > > interrupt-affinity = <&cpu_b0>, > > > > > > <&cpu_b1>; > > > > > > }; > > > > > > but unfortunately, the arm pmu driver do not support PPI in two cluster > > > well, > > > so we have to replace with this implementation. > > > > > > > In this case things are messier as the same PPI number is being used > > > > across clusters. Marc (Cc'd) has been working on PPI partitions, which > > > > should allow us to support that. > > > > > > Great! So what we can do right now? Wait this feature, and delete > > > arm-pmu node? > > > > I'd rather you have a look at the patches, test them with your HW, > > and comment on what doesn't work! > > I would think we could do it in two tracks, testing and fixing but also letting > the rk3399 devicetrees move forward without the pmu at first :-) . Where would the fun be then? ;-) M. -- Jazz is not dead. It just smells funny. -- 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