gpu: nvgpu: Use 1kHz resolution for GPCPLL programming

Used 1kHz resolution (instead of 1 MHz) for GPCPLL programming:
limits specifications, calculating GPCPLL settings, storing target
frequency values, and proving output from debug monitor. Updated
comments in clock header to properly reflect frequency units.

Bug 1450787

Change-Id: Ica58f794b82522288f2883c40626d82dbd794902
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/437943
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>

1 files changed, 10 insertions, 10 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/clk_gk20a.h b/drivers/gpu/nvgpu/gk20a/clk_gk20a.h
index d2665259..533e6d1e 100644
--- a/drivers/gpu/nvgpu/gk20a/clk_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/clk_gk20a.h
@@ -31,18 +31,18 @@ enum {
 
 struct pll {
         u32 id;
-        u32 clk_in;     /* MHz */
+        u32 clk_in;     /* KHz */
         u32 M;
         u32 N;
         u32 PL;
-        u32 freq;       /* MHz */
+        u32 freq;       /* KHz */
         bool enabled;
 };
 
 struct pll_parms {
-        u32 min_freq, max_freq; /* MHz */
-        u32 min_vco, max_vco;   /* MHz */
-        u32 min_u,   max_u;     /* MHz */
+        u32 min_freq, max_freq; /* KHz */
+        u32 min_vco, max_vco;   /* KHz */
+        u32 min_u,   max_u;     /* KHz */
         u32 min_M,   max_M;
         u32 min_N,   max_N;
         u32 min_PL,  max_PL;
@@ -60,7 +60,7 @@ struct clk_gk20a {
 
 struct gpufreq_table_data {
         unsigned int index;
-        unsigned int frequency; /* MHz */
+        unsigned int frequency; /* Hz */
 };
 
 struct gpufreq_table_data *tegra_gpufreq_table_get(void);
@@ -82,13 +82,13 @@ extern struct pll_parms gpc_pll_params;
 
 static inline unsigned long rate_gpc2clk_to_gpu(unsigned long rate)
 {
-        /* convert the MHz gpc2clk frequency to Hz gpcpll frequency */
-        return (rate * MHZ) / 2;
+        /* convert the kHz gpc2clk frequency to Hz gpcpll frequency */
+        return (rate * KHZ) / 2;
 }
 static inline unsigned long rate_gpu_to_gpc2clk(unsigned long rate)
 {
-        /* convert the Hz gpcpll frequency to MHz gpc2clk frequency */
-        return (rate * 2) / MHZ;
+        /* convert the Hz gpcpll frequency to kHz gpc2clk frequency */
+        return (rate * 2) / KHZ;
 }
 
 #endif /* _NVHOST_CLK_GK20A_H_ */