[U-Boot] [PATCH] ARM: DRA7: emif: Fix DDR init sequence during warm reset

[U-Boot] [PATCH] ARM: DRA7: emif: Fix DDR init sequence during warm reset

[Lokesh Vutla]

Unlike OMAP5, EMIF PHY used in DRA7 will be left in unknown state after
warm reset, emif needs to be configured to bring it back to a known
state. So configure EMIF during warm reset.

Reported-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 arch/arm/cpu/armv7/omap-common/emif-common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index ca22c00..f5b22f6 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -1170,7 +1170,7 @@ static void do_sdram_init(u32 base)
 	 * Changing the timing registers in EMIF can happen(going from one
 	 * OPP to another)
 	 */
-	if (!(in_sdram || warm_reset())) {
+	if (!in_sdram && (!warm_reset() || is_dra7xx())) {
 		if (emif_sdram_type(regs->sdram_config) ==
 		    EMIF_SDRAM_TYPE_LPDDR2)
 			lpddr2_init(base, regs);
@@ -1178,7 +1178,7 @@ static void do_sdram_init(u32 base)
 			ddr3_init(base, regs);
 	}
 	if (warm_reset() && (emif_sdram_type(regs->sdram_config) ==
-	    EMIF_SDRAM_TYPE_DDR3)) {
+	    EMIF_SDRAM_TYPE_DDR3) && !is_dra7xx()) {
 		set_lpmode_selfrefresh(base);
 		emif_reset_phy(base);
 		omap5_ddr3_leveling(base, regs);
-- 
1.9.1

[U-Boot] ARM: DRA7: emif: Fix DDR init sequence during warm reset

[Tom Rini]

On Thu, Jun 04, 2015 at 10:08:50AM +0530, Lokesh Vutla wrote:

> Unlike OMAP5, EMIF PHY used in DRA7 will be left in unknown state after
> warm reset, emif needs to be configured to bring it back to a known
> state. So configure EMIF during warm reset.
> 
> Reported-by: Roger Quadros <rogerq@ti.com>
> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

Applied to u-boot/master, thanks!

-- 
Tom
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