diff options
author | Olof Johansson <olof@lixom.net> | 2012-03-10 09:08:09 -0800 |
---|---|---|
committer | Olof Johansson <olof@lixom.net> | 2012-03-10 09:08:09 -0800 |
commit | e65bc8918f75620f1668d321b048bfa336ccc0fa (patch) | |
tree | 72ec2d6e5848d7ce3a2f012daf85bc08df43e49d /arch/arm/mach-omap2/pm.c | |
parent | d60d506e6baaf423148c458df3ece0c1d440dce4 (diff) | |
parent | 00fd72ccc928c1fefc4c9c3b925f82cb71750dfb (diff) |
Merge branch 'cleanup-pm' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup
* 'cleanup-pm' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: PM: share some suspend-related functions across OMAP2, 3, 4
ARM: OMAP2+: omap_device: call all suspend, resume callbacks when OMAP_DEVICE_NO_IDLE_ON_SUSPEND is set
ARM: OMAP: omap_device: remove omap_device_parent
ARM: OMAP2+: PM debug: fix the use of debugfs_create_* API
ARM: OMAP2+: PM: share clkdms_setup() across OMAP2, 3, 4
ARM: OMAP2+: PM: clean up omap_set_pwrdm_state()
ARM: OMAP3: PM: remove superfluous calls to pwrdm_clear_all_prev_pwrst()
ARM: OMAP: convert omap_device_build() and callers to __init
ARM: OMAP2+: Mark omap_hsmmc_init and omap_mux related functions as __init
ARM: OMAP2+: Split omap2_hsmmc_init() to properly support I2C GPIO pins
ARM: OMAP: omap_device: Expose omap_device_{alloc, delete, register}
ARM: OMAP: Fix build error when mmc_omap is built as module
ARM: OMAP: Fix kernel panic with HSMMC when twl4030_gpio is a module
Diffstat (limited to 'arch/arm/mach-omap2/pm.c')
-rw-r--r-- | arch/arm/mach-omap2/pm.c | 115 |
1 files changed, 92 insertions, 23 deletions
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 1881fe915149..28706696a341 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -15,11 +15,13 @@ #include <linux/err.h> #include <linux/opp.h> #include <linux/export.h> +#include <linux/suspend.h> #include <plat/omap-pm.h> #include <plat/omap_device.h> #include "common.h" +#include "prcm-common.h" #include "voltage.h" #include "powerdomain.h" #include "clockdomain.h" @@ -28,7 +30,13 @@ static struct omap_device_pm_latency *pm_lats; -static int _init_omap_device(char *name) +/* + * omap_pm_suspend: points to a function that does the SoC-specific + * suspend work + */ +int (*omap_pm_suspend)(void); + +static int __init _init_omap_device(char *name) { struct omap_hwmod *oh; struct platform_device *pdev; @@ -68,32 +76,41 @@ static void omap2_init_processor_devices(void) #define FORCEWAKEUP_SWITCH 0 #define LOWPOWERSTATE_SWITCH 1 +int __init omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused) +{ + if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO) + clkdm_allow_idle(clkdm); + else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP && + atomic_read(&clkdm->usecount) == 0) + clkdm_sleep(clkdm); + return 0; +} + /* * This sets pwrdm state (other than mpu & core. Currently only ON & * RET are supported. */ -int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) +int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 pwrst) { - u32 cur_state; - int sleep_switch = -1; - int ret = 0; - int hwsup = 0; + u8 curr_pwrst, next_pwrst; + int sleep_switch = -1, ret = 0, hwsup = 0; - if (pwrdm == NULL || IS_ERR(pwrdm)) + if (!pwrdm || IS_ERR(pwrdm)) return -EINVAL; - while (!(pwrdm->pwrsts & (1 << state))) { - if (state == PWRDM_POWER_OFF) + while (!(pwrdm->pwrsts & (1 << pwrst))) { + if (pwrst == PWRDM_POWER_OFF) return ret; - state--; + pwrst--; } - cur_state = pwrdm_read_next_pwrst(pwrdm); - if (cur_state == state) + next_pwrst = pwrdm_read_next_pwrst(pwrdm); + if (next_pwrst == pwrst) return ret; - if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) { - if ((pwrdm_read_pwrst(pwrdm) > state) && + curr_pwrst = pwrdm_read_pwrst(pwrdm); + if (curr_pwrst < PWRDM_POWER_ON) { + if ((curr_pwrst > pwrst) && (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) { sleep_switch = LOWPOWERSTATE_SWITCH; } else { @@ -103,12 +120,10 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) } } - ret = pwrdm_set_next_pwrst(pwrdm, state); - if (ret) { - pr_err("%s: unable to set state of powerdomain: %s\n", + ret = pwrdm_set_next_pwrst(pwrdm, pwrst); + if (ret) + pr_err("%s: unable to set power state of powerdomain: %s\n", __func__, pwrdm->name); - goto err; - } switch (sleep_switch) { case FORCEWAKEUP_SWITCH: @@ -119,16 +134,16 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state) break; case LOWPOWERSTATE_SWITCH: pwrdm_set_lowpwrstchange(pwrdm); + pwrdm_wait_transition(pwrdm); + pwrdm_state_switch(pwrdm); break; - default: - return ret; } - pwrdm_state_switch(pwrdm); -err: return ret; } + + /* * This API is to be called during init to set the various voltage * domains to the voltage as per the opp table. Typically we boot up @@ -196,6 +211,56 @@ exit: return -EINVAL; } +#ifdef CONFIG_SUSPEND +static int omap_pm_enter(suspend_state_t suspend_state) +{ + int ret = 0; + + if (!omap_pm_suspend) + return -ENOENT; /* XXX doublecheck */ + + switch (suspend_state) { + case PM_SUSPEND_STANDBY: + case PM_SUSPEND_MEM: + ret = omap_pm_suspend(); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int omap_pm_begin(suspend_state_t state) +{ + disable_hlt(); + if (cpu_is_omap34xx()) + omap_prcm_irq_prepare(); + return 0; +} + +static void omap_pm_end(void) +{ + enable_hlt(); + return; +} + +static void omap_pm_finish(void) +{ + if (cpu_is_omap34xx()) + omap_prcm_irq_complete(); +} + +static const struct platform_suspend_ops omap_pm_ops = { + .begin = omap_pm_begin, + .end = omap_pm_end, + .enter = omap_pm_enter, + .finish = omap_pm_finish, + .valid = suspend_valid_only_mem, +}; + +#endif /* CONFIG_SUSPEND */ + static void __init omap3_init_voltages(void) { if (!cpu_is_omap34xx()) @@ -238,6 +303,10 @@ static int __init omap2_common_pm_late_init(void) /* Smartreflex device init */ omap_devinit_smartreflex(); +#ifdef CONFIG_SUSPEND + suspend_set_ops(&omap_pm_ops); +#endif + return 0; } late_initcall(omap2_common_pm_late_init); |