Vedashree Vidwans 5c8a07022f tegra: hwpm: add dt property, update devnode perm ...

HWPM is a profiling device. Device node property support-soc-tools
indicates if soc profiling tools should be enabled or disabled.
Add logic to HWPM probe to read device node and probe HWPM device only
if support-soc-tools property is present.

Implement devnode API to disclose device node permissions for HWPM.
Set HWPM device node permissions to allow access for root and group.

Bug 3435136
Bug 3583956

Change-Id: I988de3b21cd00ef9402ca03408d2b0141e7155d8
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2717982
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
GVS: Gerrit_Virtual_Submit

2022-06-03 20:10:38 -07:00

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