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ARM: 6758/1: amba: support pm ops
Support pm_ops in the AMBA bus, required to allow drivers to use runtime pm. The implementation of AMBA bus pm ops is based on the platform bus implementation. Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rabin Vincent
Russell King
parent
2d00880fa8
commit
ba74ec7f6b
@ -13,12 +13,13 @@
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/amba/bus.h>
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#include <asm/irq.h>
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#include <asm/sizes.h>
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#define to_amba_device(d) container_of(d, struct amba_device, dev)
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#define to_amba_driver(d) container_of(d, struct amba_driver, drv)
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static const struct amba_id *
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@ -57,26 +58,6 @@ static int amba_uevent(struct device *dev, struct kobj_uevent_env *env)
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#define amba_uevent NULL
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#endif
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static int amba_suspend(struct device *dev, pm_message_t state)
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{
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struct amba_driver *drv = to_amba_driver(dev->driver);
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int ret = 0;
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if (dev->driver && drv->suspend)
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ret = drv->suspend(to_amba_device(dev), state);
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return ret;
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}
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static int amba_resume(struct device *dev)
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{
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struct amba_driver *drv = to_amba_driver(dev->driver);
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int ret = 0;
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if (dev->driver && drv->resume)
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ret = drv->resume(to_amba_device(dev));
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return ret;
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}
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#define amba_attr_func(name,fmt,arg...) \
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static ssize_t name##_show(struct device *_dev, \
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struct device_attribute *attr, char *buf) \
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@ -102,6 +83,320 @@ static struct device_attribute amba_dev_attrs[] = {
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__ATTR_NULL,
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};
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#ifdef CONFIG_PM_SLEEP
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static int amba_legacy_suspend(struct device *dev, pm_message_t mesg)
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{
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struct amba_driver *adrv = to_amba_driver(dev->driver);
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struct amba_device *adev = to_amba_device(dev);
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int ret = 0;
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if (dev->driver && adrv->suspend)
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ret = adrv->suspend(adev, mesg);
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return ret;
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}
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static int amba_legacy_resume(struct device *dev)
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{
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struct amba_driver *adrv = to_amba_driver(dev->driver);
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struct amba_device *adev = to_amba_device(dev);
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int ret = 0;
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if (dev->driver && adrv->resume)
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ret = adrv->resume(adev);
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return ret;
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}
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static int amba_pm_prepare(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (drv && drv->pm && drv->pm->prepare)
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ret = drv->pm->prepare(dev);
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return ret;
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}
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static void amba_pm_complete(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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if (drv && drv->pm && drv->pm->complete)
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drv->pm->complete(dev);
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}
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#else /* !CONFIG_PM_SLEEP */
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#define amba_pm_prepare NULL
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#define amba_pm_complete NULL
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#endif /* !CONFIG_PM_SLEEP */
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#ifdef CONFIG_SUSPEND
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static int amba_pm_suspend(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->suspend)
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ret = drv->pm->suspend(dev);
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} else {
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ret = amba_legacy_suspend(dev, PMSG_SUSPEND);
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}
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return ret;
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}
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static int amba_pm_suspend_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->suspend_noirq)
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ret = drv->pm->suspend_noirq(dev);
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}
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return ret;
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}
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static int amba_pm_resume(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->resume)
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ret = drv->pm->resume(dev);
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} else {
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ret = amba_legacy_resume(dev);
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}
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return ret;
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}
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static int amba_pm_resume_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->resume_noirq)
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ret = drv->pm->resume_noirq(dev);
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}
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return ret;
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}
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#else /* !CONFIG_SUSPEND */
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#define amba_pm_suspend NULL
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#define amba_pm_resume NULL
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#define amba_pm_suspend_noirq NULL
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#define amba_pm_resume_noirq NULL
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#endif /* !CONFIG_SUSPEND */
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#ifdef CONFIG_HIBERNATION
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static int amba_pm_freeze(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->freeze)
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ret = drv->pm->freeze(dev);
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} else {
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ret = amba_legacy_suspend(dev, PMSG_FREEZE);
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}
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return ret;
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}
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static int amba_pm_freeze_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->freeze_noirq)
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ret = drv->pm->freeze_noirq(dev);
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}
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return ret;
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}
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static int amba_pm_thaw(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->thaw)
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ret = drv->pm->thaw(dev);
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} else {
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ret = amba_legacy_resume(dev);
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}
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return ret;
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}
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static int amba_pm_thaw_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->thaw_noirq)
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ret = drv->pm->thaw_noirq(dev);
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}
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return ret;
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}
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static int amba_pm_poweroff(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->poweroff)
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ret = drv->pm->poweroff(dev);
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} else {
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ret = amba_legacy_suspend(dev, PMSG_HIBERNATE);
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}
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return ret;
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}
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static int amba_pm_poweroff_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->poweroff_noirq)
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ret = drv->pm->poweroff_noirq(dev);
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}
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return ret;
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}
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static int amba_pm_restore(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->restore)
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ret = drv->pm->restore(dev);
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} else {
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ret = amba_legacy_resume(dev);
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}
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return ret;
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}
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static int amba_pm_restore_noirq(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int ret = 0;
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if (!drv)
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return 0;
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if (drv->pm) {
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if (drv->pm->restore_noirq)
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ret = drv->pm->restore_noirq(dev);
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}
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return ret;
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}
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#else /* !CONFIG_HIBERNATION */
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#define amba_pm_freeze NULL
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#define amba_pm_thaw NULL
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#define amba_pm_poweroff NULL
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#define amba_pm_restore NULL
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#define amba_pm_freeze_noirq NULL
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#define amba_pm_thaw_noirq NULL
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#define amba_pm_poweroff_noirq NULL
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#define amba_pm_restore_noirq NULL
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#endif /* !CONFIG_HIBERNATION */
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#ifdef CONFIG_PM
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static const struct dev_pm_ops amba_pm = {
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.prepare = amba_pm_prepare,
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.complete = amba_pm_complete,
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.suspend = amba_pm_suspend,
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.resume = amba_pm_resume,
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.freeze = amba_pm_freeze,
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.thaw = amba_pm_thaw,
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.poweroff = amba_pm_poweroff,
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.restore = amba_pm_restore,
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.suspend_noirq = amba_pm_suspend_noirq,
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.resume_noirq = amba_pm_resume_noirq,
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.freeze_noirq = amba_pm_freeze_noirq,
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.thaw_noirq = amba_pm_thaw_noirq,
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.poweroff_noirq = amba_pm_poweroff_noirq,
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.restore_noirq = amba_pm_restore_noirq,
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SET_RUNTIME_PM_OPS(
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pm_generic_runtime_suspend,
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pm_generic_runtime_resume,
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pm_generic_runtime_idle
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)
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};
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#define AMBA_PM (&amba_pm)
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#else /* !CONFIG_PM */
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#define AMBA_PM NULL
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#endif /* !CONFIG_PM */
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/*
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* Primecells are part of the Advanced Microcontroller Bus Architecture,
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* so we call the bus "amba".
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@ -111,8 +406,7 @@ struct bus_type amba_bustype = {
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.dev_attrs = amba_dev_attrs,
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.match = amba_match,
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.uevent = amba_uevent,
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.suspend = amba_suspend,
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.resume = amba_resume,
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.pm = AMBA_PM,
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};
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static int __init amba_init(void)
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@ -58,6 +58,8 @@ enum amba_vendor {
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extern struct bus_type amba_bustype;
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#define to_amba_device(d) container_of(d, struct amba_device, dev)
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#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
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#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
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