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increase LPDDR2 die DS from 48ohm to 34ohm, then LPDDR2 operate frequency can reach 400MHz

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hecanyang
2012-05-05 10:46:21 +08:00
parent 35e84c84d8
commit e49241ff5f
1 changed files with 3 additions and 3 deletions
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6
arch/arm/mach-rk30/ddr.c
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@@ -1735,7 +1735,7 @@ static uint32_t ddr_get_parameter(uint32_t nMHz)
cwl = 4;
p_ddr_timing->phy_timing.mr[2] = LPDDR2_RL8_WL4;
}
p_ddr_timing->phy_timing.mr[3] = LPDDR2_DS_48;
p_ddr_timing->phy_timing.mr[3] = LPDDR2_DS_34;
p_ddr_timing->phy_timing.mr[0] = 0;
/**************************************************
* PCTL Timing
@@ -2548,7 +2548,7 @@ static uint32_t __sramlocalfunc ddr_update_timing(void)
pDDR_Reg->DFITRDDATAEN = pDDR_Reg->TCL-2;
pDDR_Reg->DFITPHYWRLAT = pDDR_Reg->TCWL-1;
}
if(mem_type == LPDDR2)
else if(mem_type == LPDDR2)
{
if(ddr_freq>=200)
{
@@ -2802,7 +2802,7 @@ int ddr_init(uint32_t dram_type, uint32_t freq)
uint32_t cs;
uint32_t gsr,dqstr;
ddr_print("version 1.00 20120424 \n");
ddr_print("version 1.00 20120505 \n");
mem_type = pPHY_Reg->DCR.b.DDRMD;
ddr_type = dram_type;