diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/emif-common.c')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/emif-common.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c index edc63fa9cb..64427e61da 100644 --- a/arch/arm/cpu/armv7/omap-common/emif-common.c +++ b/arch/arm/cpu/armv7/omap-common/emif-common.c @@ -32,6 +32,27 @@ #include <asm/omap_common.h> #include <asm/utils.h> +void set_lpmode_selfrefresh(u32 base) +{ + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + u32 reg; + + reg = readl(&emif->emif_pwr_mgmt_ctrl); + reg &= ~EMIF_REG_LP_MODE_MASK; + reg |= LP_MODE_SELF_REFRESH << EMIF_REG_LP_MODE_SHIFT; + reg &= ~EMIF_REG_SR_TIM_MASK; + writel(reg, &emif->emif_pwr_mgmt_ctrl); + + /* dummy read for the new SR_TIM to be loaded */ + readl(&emif->emif_pwr_mgmt_ctrl); +} + +void force_emif_self_refresh() +{ + set_lpmode_selfrefresh(EMIF1_BASE); + set_lpmode_selfrefresh(EMIF2_BASE); +} + inline u32 emif_num(u32 base) { if (base == EMIF1_BASE) |
