perf/arm-ccn: Assign parents for event_source device

Currently the PMU device appears directly under /sys/devices/
Only root busses should appear there, so instead assign the pmu->dev
parent to be the platform device.

Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240412161057.14099-20-Jonathan.Cameron@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index 641471bd5eff4010e2124e28ff8a7b4f628fed98..f4495ff6525f65ba213e5b8a754437859fd4561a 100644 (file)
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -1265,6 +1265,7 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
        /* Perf driver registration */
        ccn->dt.pmu = (struct pmu) {
                .module = THIS_MODULE,
+               .parent = ccn->dev,
                .attr_groups = arm_ccn_pmu_attr_groups,
                .task_ctx_nr = perf_invalid_context,
                .event_init = arm_ccn_pmu_event_init,