From: hecanyang <hcy@ubuntu-fs.(none)>
Date: Sat, 28 Apr 2012 07:18:14 +0000 (+0800)
Subject:   DDR3 ODT reduce from 120ohm to 60ohm
X-Git-Tag: firefly_0821_release~9285
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4d2fbd0f746ee92bd63aaaf7bacfdd21b917981d;p=firefly-linux-kernel-4.4.55.git

  DDR3 ODT reduce from 120ohm to 60ohm
---

diff --git a/arch/arm/mach-rk30/ddr.c b/arch/arm/mach-rk30/ddr.c
index bbbd6b27bb7f..9945246f3958 100755
--- a/arch/arm/mach-rk30/ddr.c
+++ b/arch/arm/mach-rk30/ddr.c
@@ -1284,6 +1284,9 @@ static __sramfunc void ddr_adjust_config(uint32_t dram_type)
     idle_port();
     move_to_Config_state();
 
+    //extend capability for debug
+    pGRF_Reg->GRF_SOC_CON[2] = rank_to_row15_en;
+
     //set data training address
     pPHY_Reg->DTAR = value;
 
@@ -1293,7 +1296,7 @@ static __sramfunc void ddr_adjust_config(uint32_t dram_type)
     //adjust DRV and ODT
     if(dram_type == DDR3)
     {
-        pPHY_Reg->ZQ0CR[1] = 0x1B;  //DS=40ohm,ODT=120ohm
+        pPHY_Reg->ZQ0CR[1] = 0x5B;  //DS=40ohm,ODT=60ohm
         pPHY_Reg->ZQ0CR[0] |= (1<<30);  //trigger
     }
     if (dram_type == DDR2)