ARM: DRA7/OMAP5: EMIF: Add workaround for bug 0039

When core power domain hits oswr, then DDR3 memories does not come back
while resuming. This is because when EMIF registers are lost, then the
controller takes care of copying the values from the shadow registers.
If the shadow registers are not updated with the right values, then this
results in incorrect settings while resuming. So updating the shadow registers
with the corresponding status registers here during the boot.

Signed-off-by: Sricharan R <r.sricharan@ti.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h
index c12beea0ca..d9d521a515 100644
--- a/arch/arm/include/asm/emif.h
+++ b/arch/arm/include/asm/emif.h
@@ -640,7 +640,9 @@ struct emif_reg_struct {
 	u32 emif_ddr_phy_ctrl_2;
 	u32 padding7[12];
 	u32 emif_rd_wr_exec_thresh;
-	u32 padding8[55];
+	u32 padding8[7];
+	u32 emif_ddr_phy_status[21];
+	u32 padding9[27];
 	u32 emif_ddr_ext_phy_ctrl_1;
 	u32 emif_ddr_ext_phy_ctrl_1_shdw;
 	u32 emif_ddr_ext_phy_ctrl_2;
@@ -1141,6 +1143,11 @@ struct lpddr2_mr_regs {
 	s8 mr16;
 };
 
+struct read_write_regs {
+	u32 read_reg;
+	u32 write_reg;
+};
+
 /* assert macros */
 #if defined(DEBUG)
 #define emif_assert(c)	({ if (!(c)) for (;;); })
@@ -1169,4 +1176,5 @@ extern u32 *const T_den;
 
 void config_data_eye_leveling_samples(u32 emif_base);
 u32 emif_sdram_type(void);
+const struct read_write_regs *get_bug_regs(u32 *iterations);
 #endif