From: Robin Murphy Date: Tue, 9 Apr 2024 17:15:17 +0000 (+0100) Subject: perf/arm-cmn: Set PMU device parent X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8f9f5041c64600b01b71f29fb8e2121e45bfb719;p=linux.git perf/arm-cmn: Set PMU device parent Now that perf supports giving the PMU device a parent, we can use our platform device to make the relationship between CMN instances and PMU IDs trivially discoverable, from either nominal direction: root@crazy-taxi:~# ls /sys/devices/platform/ARMHC600:00 | grep cmn arm_cmn_0 root@crazy-taxi:~# realpath /sys/bus/event_source/devices/arm_cmn_0/.. /sys/devices/platform/ARMHC600:00 Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/25d4428df1ddad966c74a3ed60171cd3ca6c8b66.1712682917.git.robin.murphy@arm.com Signed-off-by: Will Deacon --- diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 6bfb0c4a1287e..e26ad1d3ed0bb 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2482,6 +2482,7 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); cmn->pmu = (struct pmu) { .module = THIS_MODULE, + .parent = cmn->dev, .attr_groups = arm_cmn_attr_groups, .capabilities = PERF_PMU_CAP_NO_EXCLUDE, .task_ctx_nr = perf_invalid_context,