Many thanks, it seems to work. Regards, Willy On Fri, Apr 12, 2019 at 05:12:59PM +0100, Robin Murphy wrote: > On 12/04/2019 17:01, Willy Wolff wrote: > > 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 > > That message looks to come from devm_ioremap_resource(), which implies that > platform_get_resource() is returning NULL in cci_pmu_probe(). Looking at the > DT, you have a thing at offset 0x9000 under a parent "ranges" which is only > 0x6000 long, so I'd guess the OF platform layer probably gave up on creating > the resources when it couldn't translate the address. > > Robin. > > > [ 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 > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > >
