diff options
Diffstat (limited to 'drivers/amba')
| -rw-r--r-- | drivers/amba/bus.c | 340 |
1 files changed, 317 insertions, 23 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 43088996a07a..6d2bb2524b6e 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -13,12 +13,13 @@ #include <linux/string.h> #include <linux/slab.h> #include <linux/io.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> #include <linux/amba/bus.h> #include <asm/irq.h> #include <asm/sizes.h> -#define to_amba_device(d) container_of(d, struct amba_device, dev) #define to_amba_driver(d) container_of(d, struct amba_driver, drv) static const struct amba_id * @@ -57,26 +58,6 @@ static int amba_uevent(struct device *dev, struct kobj_uevent_env *env) #define amba_uevent NULL #endif -static int amba_suspend(struct device *dev, pm_message_t state) -{ - struct amba_driver *drv = to_amba_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->suspend) - ret = drv->suspend(to_amba_device(dev), state); - return ret; -} - -static int amba_resume(struct device *dev) -{ - struct amba_driver *drv = to_amba_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->resume) - ret = drv->resume(to_amba_device(dev)); - return ret; -} - #define amba_attr_func(name,fmt,arg...) \ static ssize_t name##_show(struct device *_dev, \ struct device_attribute *attr, char *buf) \ @@ -102,6 +83,320 @@ static struct device_attribute amba_dev_attrs[] = { __ATTR_NULL, }; +#ifdef CONFIG_PM_SLEEP + +static int amba_legacy_suspend(struct device *dev, pm_message_t mesg) +{ + struct amba_driver *adrv = to_amba_driver(dev->driver); + struct amba_device *adev = to_amba_device(dev); + int ret = 0; + + if (dev->driver && adrv->suspend) + ret = adrv->suspend(adev, mesg); + + return ret; +} + +static int amba_legacy_resume(struct device *dev) +{ + struct amba_driver *adrv = to_amba_driver(dev->driver); + struct amba_device *adev = to_amba_device(dev); + int ret = 0; + + if (dev->driver && adrv->resume) + ret = adrv->resume(adev); + + return ret; +} + +static int amba_pm_prepare(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (drv && drv->pm && drv->pm->prepare) + ret = drv->pm->prepare(dev); + + return ret; +} + +static void amba_pm_complete(struct device *dev) +{ + struct device_driver *drv = dev->driver; + + if (drv && drv->pm && drv->pm->complete) + drv->pm->complete(dev); +} + +#else /* !CONFIG_PM_SLEEP */ + +#define amba_pm_prepare NULL +#define amba_pm_complete NULL + +#endif /* !CONFIG_PM_SLEEP */ + +#ifdef CONFIG_SUSPEND + +static int amba_pm_suspend(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->suspend) + ret = drv->pm->suspend(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_SUSPEND); + } + + return ret; +} + +static int amba_pm_suspend_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->suspend_noirq) + ret = drv->pm->suspend_noirq(dev); + } + + return ret; +} + +static int amba_pm_resume(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->resume) + ret = drv->pm->resume(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_resume_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->resume_noirq) + ret = drv->pm->resume_noirq(dev); + } + + return ret; +} + +#else /* !CONFIG_SUSPEND */ + +#define amba_pm_suspend NULL +#define amba_pm_resume NULL +#define amba_pm_suspend_noirq NULL +#define amba_pm_resume_noirq NULL + +#endif /* !CONFIG_SUSPEND */ + +#ifdef CONFIG_HIBERNATION + +static int amba_pm_freeze(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->freeze) + ret = drv->pm->freeze(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_FREEZE); + } + + return ret; +} + +static int amba_pm_freeze_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->freeze_noirq) + ret = drv->pm->freeze_noirq(dev); + } + + return ret; +} + +static int amba_pm_thaw(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->thaw) + ret = drv->pm->thaw(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_thaw_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->thaw_noirq) + ret = drv->pm->thaw_noirq(dev); + } + + return ret; +} + +static int amba_pm_poweroff(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->poweroff) + ret = drv->pm->poweroff(dev); + } else { + ret = amba_legacy_suspend(dev, PMSG_HIBERNATE); + } + + return ret; +} + +static int amba_pm_poweroff_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->poweroff_noirq) + ret = drv->pm->poweroff_noirq(dev); + } + + return ret; +} + +static int amba_pm_restore(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->restore) + ret = drv->pm->restore(dev); + } else { + ret = amba_legacy_resume(dev); + } + + return ret; +} + +static int amba_pm_restore_noirq(struct device *dev) +{ + struct device_driver *drv = dev->driver; + int ret = 0; + + if (!drv) + return 0; + + if (drv->pm) { + if (drv->pm->restore_noirq) + ret = drv->pm->restore_noirq(dev); + } + + return ret; +} + +#else /* !CONFIG_HIBERNATION */ + +#define amba_pm_freeze NULL +#define amba_pm_thaw NULL +#define amba_pm_poweroff NULL +#define amba_pm_restore NULL +#define amba_pm_freeze_noirq NULL +#define amba_pm_thaw_noirq NULL +#define amba_pm_poweroff_noirq NULL +#define amba_pm_restore_noirq NULL + +#endif /* !CONFIG_HIBERNATION */ + +#ifdef CONFIG_PM + +static const struct dev_pm_ops amba_pm = { + .prepare = amba_pm_prepare, + .complete = amba_pm_complete, + .suspend = amba_pm_suspend, + .resume = amba_pm_resume, + .freeze = amba_pm_freeze, + .thaw = amba_pm_thaw, + .poweroff = amba_pm_poweroff, + .restore = amba_pm_restore, + .suspend_noirq = amba_pm_suspend_noirq, + .resume_noirq = amba_pm_resume_noirq, + .freeze_noirq = amba_pm_freeze_noirq, + .thaw_noirq = amba_pm_thaw_noirq, + .poweroff_noirq = amba_pm_poweroff_noirq, + .restore_noirq = amba_pm_restore_noirq, + SET_RUNTIME_PM_OPS( + pm_generic_runtime_suspend, + pm_generic_runtime_resume, + pm_generic_runtime_idle + ) +}; + +#define AMBA_PM (&amba_pm) + +#else /* !CONFIG_PM */ + +#define AMBA_PM NULL + +#endif /* !CONFIG_PM */ + /* * Primecells are part of the Advanced Microcontroller Bus Architecture, * so we call the bus "amba". @@ -111,8 +406,7 @@ struct bus_type amba_bustype = { .dev_attrs = amba_dev_attrs, .match = amba_match, .uevent = amba_uevent, - .suspend = amba_suspend, - .resume = amba_resume, + .pm = AMBA_PM, }; static int __init amba_init(void) |