gpu: nvgpu: use platform data for ptimer source rate

Instead of depending on clock frame-work, use platform data
for ptimer source rate. Removed ptimerscaling10x platform
data, and use ptimer source frequency to calculate
ptimerscaling factor.

Reviewed-on: http://git-master/r/819030
(cherry picked from commit dd291334d54dab80cab7eb1656dffc48a59610b4)

Change-Id: I7638ce9875a6e440bbfc2ba2da0d0b094b2700ff
Signed-off-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/827300
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index e106c479..58c8e9ad 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -50,6 +50,10 @@ struct acr_gm20b;
 #include "cde_gk20a.h"
 #include "debug_gk20a.h"
 
+/* PTIMER_REF_FREQ_HZ corresponds to a period of 32 nanoseconds.
+    32 ns is the resolution of ptimer. */
+#define PTIMER_REF_FREQ_HZ                      31250000
+
 struct cooling_device_gk20a {
         struct thermal_cooling_device *gk20a_cooling_dev;
         unsigned int gk20a_freq_state;
@@ -901,6 +905,10 @@ void gk20a_user_deinit(struct platform_device *dev);
 
 extern void gk20a_debug_dump_device(struct platform_device *pdev);
 
+static inline u32 ptimer_scalingfactor10x(u32 ptimer_src_freq)
+{
+        return (u32)(((u64)(PTIMER_REF_FREQ_HZ * 10)) / ptimer_src_freq);
+}
 static inline u32 scale_ptimer(u32 timeout , u32 scale10x)
 {
         if (((timeout*10) % scale10x) >= (scale10x/2))