diff options
| author | Nishanth Menon <[email protected]> | 2016-03-09 17:39:56 +0530 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2016-03-15 21:30:19 -0400 |
| commit | 3eb80d10c7715d427808908b259646f1df781264 (patch) | |
| tree | e0263281b1ee8411779699cbff668af16521e927 | |
| parent | d28a86c07adc4b0288b86084db074c327cde2731 (diff) | |
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 <[email protected]>
Signed-off-by: Lokesh Vutla <[email protected]>
Tested-by: Tom Rini <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
| -rw-r--r-- | arch/arm/include/asm/emif.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h index 31831302aaf..b00decec6d4 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))\ |