ARM: tegra12: clock: Update emc to cpu rate ratio limits

Original commit: 4d0f63f0082d88a719dd66f3f795d1cf6857be71

Signed-off-by: Bhanu Chetlapalli <bchetlapalli@nvidia.com>
Change-Id: Ie16d81d34e2d8825942ce87b8a0a049ddcecbd8e
Reviewed-on: http://git-master/r/194786
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Chao Xu <cxu@nvidia.com>
Reviewed-on: http://git-master/r/200189
Tested-by: Chao Xu <cxu@nvidia.com>

diff --git a/arch/arm/mach-tegra/tegra12_clocks.c b/arch/arm/mach-tegra/tegra12_clocks.c
index 2cd12305692c57fe32b69803fe7ea380830d5063..4668d056936e0fd1f6dd57c917b0840c3abe5545 100644 (file)
--- a/arch/arm/mach-tegra/tegra12_clocks.c
+++ b/arch/arm/mach-tegra/tegra12_clocks.c
@@ -7040,12 +7040,16 @@ unsigned long tegra_emc_to_cpu_ratio(unsigned long cpu_rate)
 
        /* Vote on memory bus frequency based on cpu frequency;
           cpu rate is in kHz, emc rate is in Hz */
-       if (cpu_rate >= 750000)
-               return emc_max_rate;    /* cpu >= 750 MHz, emc max */
-       else if (cpu_rate >= 450000)
-               return emc_max_rate/2;  /* cpu >= 500 MHz, emc max/2 */
-       else if (cpu_rate >= 250000)
-               return 100000000;       /* cpu >= 250 MHz, emc 100 MHz */
+       if (cpu_rate >= 1300000)
+               return emc_max_rate;    /* cpu >= 1.3GHz, emc max */
+       else if (cpu_rate >= 975000)
+               return 400000000;       /* cpu >= 975 MHz, emc 400 MHz */
+       else if (cpu_rate >= 725000)
+               return  200000000;      /* cpu >= 725 MHz, emc 200 MHz */
+       else if (cpu_rate >= 500000)
+               return  100000000;      /* cpu >= 500 MHz, emc 100 MHz */
+       else if (cpu_rate >= 275000)
+               return  50000000;       /* cpu >= 275 MHz, emc 50 MHz */
        else
                return 0;               /* emc min */
 }