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5de17f758a
Add support to select initial operating mode (GPIO or TIMER) through DT property "nvpps-event-mode-init". This allows users to specify which mode the driver should start in rather than always defaulting to GPIO mode if gpios property is specified in DT. Key changes: - Add DT property parsing for initial event mode - Add validation to ensure selected mode is supported - If this property is not specified, default mode selection happens based on if nvpps-gpios property is defined or not - Add informative debug messages about selected mode - Add error handling for invalid configurations(eg: init mode is GPIO but gpios property is not defined). If validation fails, probe returns error instead of defaulting to TIMER mode. bug 5253938 Change-Id: I64c2a6565eeb46d6b07cf266cd4189fba9f0fba3 Signed-off-by: Sheetal Tigadoli <stigadoli@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3352704 (cherry picked from commit 091bb3ff50972e8dc3d7b941d850b4c1457b2a9e) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3361726 GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com> Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>