Hi, I'm trying to add pmu support for CCI400 on an Odroid-XU3/4. Following https://www.kernel.org/doc/Documentation/devicetree/bindings/arm/cci.txt, and other dtsi, I end up with this patch: diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi index f4e8c5823bc2..8432f01fb463 100644 --- a/arch/arm/boot/dts/exynos5420.dtsi +++ b/arch/arm/boot/dts/exynos5420.dtsi @@ -170,6 +170,16 @@ interface-type = "ace"; reg = <0x5000 0x1000>; }; + + pmu@9000 { + compatible = "arm,cci-400-pmu,r0"; + reg = <0x9000 0x5000>; + interrupts = <0 105 4>, + <0 101 4>, + <0 102 4>, + <0 103 4>, + <0 104 4>; + }; }; clock: clock-controller@10010000 { Saddly, I got: [ 5.375913] ARM-CCI PMU 10d20000.cci:pmu@9000: invalid resource [ 5.389595] ARM-CCI PMU: probe of 10d20000.cci:pmu@9000 failed with error -12 By pluging some printk here and there in arm-cci.c in init and probe functions, all return 0. I assume that the driver initialisation is succesful. I trace a bit more in really_probe function, however, I can't find the real cause of this error. $ dmesg | grep cci [ 0.070299] drivers/bus/arm-cci.c:569:cci_init() [ 0.071484] drivers/bus/arm-cci.c:580:cci_init() cci_init_status = 0 [ 0.071610] drivers/bus/arm-cci.c:595:cci_probed() cci_init_status = 0 [ 0.113575] drivers/bus/arm-cci.c:569:cci_init() [ 0.113684] drivers/bus/arm-cci.c:572:cci_init() cci_init_status = 0 [ 0.770287] drivers/bus/arm-cci.c:94:cci_platform_init() 0 [ 0.811655] drivers/base/dd.c:516:really_probe() ARM-CCI 10d20000.cci try probe drv = c1058908, drv->probe = c0593498, dev = e8b2f010 [ 0.811788] drivers/bus/arm-cci.c:72:cci_platform_probe() [ 0.811866] drivers/bus/arm-cci.c:569:cci_init() [ 0.811937] drivers/bus/arm-cci.c:572:cci_init() cci_init_status = 0 [ 0.812023] drivers/bus/arm-cci.c:595:cci_probed() cci_init_status = 0 [ 0.814718] drivers/bus/arm-cci.c:79:cci_platform_probe() 0 [ 6.738502] drivers/base/dd.c:516:really_probe() ARM-CCI PMU 10d20000.cci:pmu@9000 try probe drv = c10859f4, drv->probe = c0593498, dev = e8b2fc10 [ 6.747909] ARM-CCI PMU 10d20000.cci:pmu@9000: invalid resource [ 6.753711] drivers/base/dd.c:522:really_probe() ARM-CCI PMU 10d20000.cci:pmu@9000 fail probe [ 6.762416] drivers/base/dd.c:561:really_probe() ARM-CCI PMU 10d20000.cci:pmu@9000 probe_failed [ 6.770940] ARM-CCI PMU: probe of 10d20000.cci:pmu@9000 failed with error -12 I don't know if the provided values for dtsi is correct either. I would be very happy to have some help to make these pmu working. Many thanks in advance. Best Regards, Willy
