commit 80230c6d6e97f6150b9a7b62206a0017f7ce57d0
author Lokesh Vutla <lokeshvutla@ti.com> Thu Jun 04 10:08:50 2015 +0530
committer Tom Rini <trini@konsulko.com> Mon Jun 15 10:57:27 2015 -0400
tree fa43c37a6848a8b6067694d3d62f246ee15a72e1
parent 843fabde2fbfd4429e5447c551cae9f0c8b18419

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

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

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 @@
 	 * 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 @@
 			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);