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ARM: DRA7: emif: Fix DDR init sequence during warm reset

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Commit (20fae0a - ARM: DRA7: DDR: Enable SR in Power Management Control)
enables Self refresh mode by default and during warm reset the EMIF
contents are preserved. After warm reset EMIF sees that it is idle and
puts DDR in self-refresh. When in SR, leveling operations cannot be done
as DDR can only accept SR exit command, so its hanging during warm reset.
In order to fix this reset the power management control register before
EMIF initialization if it is a warm reset.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Lokesh Vutla 2016-03-05 17:32:29 +05:30 committed by Tom Rini
parent de09547478
commit 4571c519b4
1 changed files with 3 additions and 1 deletions
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4
arch/arm/cpu/armv7/omap-common/emif-common.c
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@ -327,8 +327,10 @@ static void dra7_ddr3_init(u32 base, const struct emif_regs *regs)
{
struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
if (warm_reset())
if (warm_reset()) {
emif_reset_phy(base);
writel(0x0, &emif->emif_pwr_mgmt_ctrl);
}
do_ext_phy_settings(base, regs);
writel(regs->ref_ctrl | EMIF_REG_INITREF_DIS_MASK,