diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 64 |
1 files changed, 54 insertions, 10 deletions
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index b88da1bcb66c..05ee05f012ad 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -49,7 +49,10 @@ static LIST_HEAD(pwrst_list); static void (*_omap_sram_idle)(u32 *addr, int save_state); -static struct powerdomain *mpu_pwrdm; +static struct powerdomain *mpu_pwrdm, *neon_pwrdm; +static struct powerdomain *core_pwrdm, *per_pwrdm; + +static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state); /* * PRCM Interrupt Handler Helper Function @@ -169,13 +172,22 @@ static void omap_sram_idle(void) /* save_state = 1 => Only L1 and logic lost */ /* save_state = 2 => Only L2 lost */ /* save_state = 3 => L1, L2 and logic lost */ - int save_state = 0, mpu_next_state; + int save_state = 0; + int mpu_next_state = PWRDM_POWER_ON; + int per_next_state = PWRDM_POWER_ON; + int core_next_state = PWRDM_POWER_ON; if (!_omap_sram_idle) return; + pwrdm_clear_all_prev_pwrst(mpu_pwrdm); + pwrdm_clear_all_prev_pwrst(neon_pwrdm); + pwrdm_clear_all_prev_pwrst(core_pwrdm); + pwrdm_clear_all_prev_pwrst(per_pwrdm); + mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm); switch (mpu_next_state) { + case PWRDM_POWER_ON: case PWRDM_POWER_RET: /* No need to save context */ save_state = 0; @@ -187,18 +199,37 @@ static void omap_sram_idle(void) } pwrdm_pre_transition(); - omap2_gpio_prepare_for_retention(); - omap_uart_prepare_idle(0); - omap_uart_prepare_idle(1); - omap_uart_prepare_idle(2); + /* NEON control */ + if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON) + set_pwrdm_state(neon_pwrdm, mpu_next_state); + + /* CORE & PER */ + core_next_state = pwrdm_read_next_pwrst(core_pwrdm); + if (core_next_state < PWRDM_POWER_ON) { + omap2_gpio_prepare_for_retention(); + omap_uart_prepare_idle(0); + omap_uart_prepare_idle(1); + /* PER changes only with core */ + per_next_state = pwrdm_read_next_pwrst(per_pwrdm); + if (per_next_state < PWRDM_POWER_ON) + omap_uart_prepare_idle(2); + /* Enable IO-PAD wakeup */ + prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN); + } _omap_sram_idle(NULL, save_state); cpu_init(); - omap_uart_resume_idle(2); - omap_uart_resume_idle(1); - omap_uart_resume_idle(0); - omap2_gpio_resume_after_retention(); + if (core_next_state < PWRDM_POWER_ON) { + if (per_next_state < PWRDM_POWER_ON) + omap_uart_resume_idle(2); + omap_uart_resume_idle(1); + omap_uart_resume_idle(0); + + /* Disable IO-PAD wakeup */ + prm_clear_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN); + omap2_gpio_resume_after_retention(); + } pwrdm_post_transition(); @@ -792,6 +823,10 @@ static int __init omap3_pm_init(void) goto err2; } + neon_pwrdm = pwrdm_lookup("neon_pwrdm"); + per_pwrdm = pwrdm_lookup("per_pwrdm"); + core_pwrdm = pwrdm_lookup("core_pwrdm"); + omap_push_sram_idle(); #ifdef CONFIG_SUSPEND suspend_set_ops(&omap_pm_ops); @@ -799,6 +834,15 @@ static int __init omap3_pm_init(void) pm_idle = omap3_pm_idle; + pwrdm_add_wkdep(neon_pwrdm, mpu_pwrdm); + /* + * REVISIT: This wkdep is only necessary when GPIO2-6 are enabled for + * IO-pad wakeup. Otherwise it will unnecessarily waste power + * waking up PER with every CORE wakeup - see + * http://marc.info/?l=linux-omap&m=121852150710062&w=2 + */ + pwrdm_add_wkdep(per_pwrdm, core_pwrdm); + err1: return ret; err2: |
