bmwgr: t186: Add API for EMC to DRAM conversion factor

Based on DRAM type, we decide the ratio between dram
and memory controller frequency.
For LP4:
EMC Freq MHz = 0.5 * DRAM Freq MHz
For LP3/DDR3:
EMC Freq MHz = DRAM Freq MHz

Bug 1801042
Bug 1764786

Change-Id: Icc8468f9debdc67029a112a49d91fb94883e6440
Signed-off-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-on: http://git-master/r/1205361
Reviewed-by: Krishna Sitaraman <ksitaraman@nvidia.com>
Reviewed-by: Ayoosh Bansal <ayooshb@nvidia.com>
Reviewed-by: Alexander Van Brunt <avanbrunt@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/platform/tegra/bwmgr_mc.h b/include/linux/platform/tegra/bwmgr_mc.h
index 35f641f22..e6b81a7f0 100644
--- a/include/linux/platform/tegra/bwmgr_mc.h
+++ b/include/linux/platform/tegra/bwmgr_mc.h
@@ -28,5 +28,5 @@ unsigned long bwmgr_bw_to_freq(unsigned long bw);
 
 u32 bwmgr_dvfs_latency(u32 ufreq);
 int bwmgr_iso_bw_percentage_max(void);
-
+int bwmgr_get_emc_to_dram_freq_factor(void);
 #endif /* __BWMGR_MC_H */