diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/ddr.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c index b3fb0c47ab..888cf1f732 100644 --- a/arch/arm/cpu/armv7/am33xx/ddr.c +++ b/arch/arm/cpu/armv7/am33xx/ddr.c @@ -164,6 +164,13 @@ void config_sdram(const struct emif_regs *regs, int nr) writel(regs->zq_config, &emif_reg[nr]->emif_zq_config); writel(regs->sdram_config, &cstat->secure_emif_sdram_config); writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config); + + /* Trigger initialization */ + writel(0x00003100, &emif_reg[nr]->emif_sdram_ref_ctrl); + /* Wait 1ms because of L3 timeout error */ + udelay(1000); + + /* Write proper sdram_ref_cref_ctrl value */ writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl); writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw); } @@ -292,7 +299,9 @@ void config_ddr_phy(const struct emif_regs *regs, int nr) EMIF_REG_INITREF_DIS_MASK); #endif if (regs->zq_config) - writel(0x80003100, &emif_reg[nr]->emif_sdram_ref_ctrl); + /* Set time between rising edge of DDR_RESET to rising + * edge of DDR_CKE to > 500us per memory spec. */ + writel(0x00003100, &emif_reg[nr]->emif_sdram_ref_ctrl); writel(regs->emif_ddr_phy_ctlr_1, &emif_reg[nr]->emif_ddr_phy_ctrl_1); |