From: Nishanth Menon <n...@ti.com>
If EMIF is idle for certain amount of DDR cycles, EMIF will put the
DDR in self refresh mode to save power if EMIF_PWR_MGMT_CTRL register
is programmed. And also before entering suspend-resume ddr needs to
be put in self-refresh. Linux kernel does not program this register
before entering suspend and relies on u-boot setting.
So configuring it in u-boot.
Signed-off-by: Nishanth Menon <n...@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvu...@ti.com>
---
arch/arm/include/asm/emif.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h
index 3183130..b00dece 100644
--- a/arch/arm/include/asm/emif.h
+++ b/arch/arm/include/asm/emif.h
@@ -914,8 +914,8 @@ struct dmm_lisa_map_regs {
/* Maximum delay before Low Power Modes */
#define REG_CS_TIM 0x0
-#define REG_SR_TIM 0x0
-#define REG_PD_TIM 0x0
+#define REG_SR_TIM 0xF
+#define REG_PD_TIM 0xF
/* EMIF_PWR_MGMT_CTRL register */
@@ -923,7 +923,7 @@ struct dmm_lisa_map_regs {
((REG_CS_TIM << EMIF_REG_CS_TIM_SHIFT) & EMIF_REG_CS_TIM_MASK)|\
((REG_SR_TIM << EMIF_REG_SR_TIM_SHIFT) & EMIF_REG_SR_TIM_MASK)|\
((REG_PD_TIM << EMIF_REG_PD_TIM_SHIFT) & EMIF_REG_PD_TIM_MASK)|\
- ((LP_MODE_DISABLE << EMIF_REG_LP_MODE_SHIFT)\
+ ((LP_MODE_SELF_REFRESH << EMIF_REG_LP_MODE_SHIFT)\
& EMIF_REG_LP_MODE_MASK) |\
((DPD_DISABLE << EMIF_REG_DPD_EN_SHIFT)\
& EMIF_REG_DPD_EN_MASK))\
--
2.1.4
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