gpu: nvgpu: support for clk.measure_freq for igpu

Add support for the measure_freq clock op for igpu:
  - add nvgpu_clk_measure_freq(), which in turn calls
    the get_rate() clock op.
  - Initialize the measure_freq clock op to nvgpu_clk_measure_freq()
    for native linux and vgpu.

JIRA ESRM-398

Change-Id: I8a3b2ee79e29e3491a16f55281494f05cd841b07
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1850585
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Nirav Patel <nipatel@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/clk.c b/drivers/gpu/nvgpu/os/linux/clk.c
index e76720ac..36c13577 100644
--- a/drivers/gpu/nvgpu/os/linux/clk.c
+++ b/drivers/gpu/nvgpu/os/linux/clk.c
@@ -26,6 +26,7 @@
 #include "platform_gk20a.h"
 
 #include <nvgpu/gk20a.h>
+#include <nvgpu/clk_arb.h>
 
 #define HZ_TO_MHZ(x) ((x) / 1000000)
 
@@ -280,4 +281,5 @@ void nvgpu_linux_init_clk_support(struct gk20a *g)
         g->ops.clk.clk_domain_get_f_points = nvgpu_linux_clk_get_f_points;
         g->ops.clk.get_clk_range = nvgpu_clk_get_range;
         g->ops.clk.clk_get_round_rate = nvgpu_clk_get_round_rate;
+        g->ops.clk.measure_freq = nvgpu_clk_measure_freq;
 }