summaryrefslogtreecommitdiff
path: root/arch/arm/cpu/armv7/am33xx/ddr.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/cpu/armv7/am33xx/ddr.c')
-rw-r--r--arch/arm/cpu/armv7/am33xx/ddr.c11
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);