From 3eb80d10c7715d427808908b259646f1df781264 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Wed, 9 Mar 2016 17:39:56 +0530 Subject: [PATCH] ARM: DRA7: DDR: Enable SR in Power Management Control 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 Signed-off-by: Lokesh Vutla Tested-by: Tom Rini Reviewed-by: Tom Rini --- 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 31831302aa..b00decec6d 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))\ -- 2.30.2