Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (23 commits)
  at_hdmac: Rework suspend_late()/resume_early()
  PM: Reset transition_started at dpm_resume_noirq
  PM: Update kerneldoc comments in drivers/base/power/main.c
  PM: Add convenience macro to make switching to dev_pm_ops less error-prone
  hp-wmi: Switch driver to dev_pm_ops
  floppy: Switch driver to dev_pm_ops
  PM: Trivial fixes
  PM / Hibernate / Memory hotplug: Always use for_each_populated_zone()
  PM/Hibernate: Do not try to allocate too much memory too hard (rev. 2)
  PM/Hibernate: Do not release preallocated memory unnecessarily (rev. 2)
  PM/Hibernate: Rework shrinking of memory
  PM: Fix typo in label name s/Platofrm_finish/Platform_finish/
  PM: Run-time PM platform device bus support
  PM: Introduce core framework for run-time PM of I/O devices (rev. 17)
  Driver Core: Make PM operations a const pointer
  PM: Remove platform device suspend_late()/resume_early() V2
  USB: Rework musb suspend()/resume_early()
  I2C: Rework i2c-s3c2410 suspend_late()/resume() V2
  I2C: Rework i2c-pxa suspend_late()/resume_early()
  DMA: Rework txx9dmac suspend_late()/resume_early()
  ...

Fix trivial conflict in drivers/base/platform.c (due to same
constification patch being merged in both sides, along with some other
PM work in the PM branch)

arch/arm/include/asm/device.h

@@ -12,4 +12,7 @@ struct dev_archdata {
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif

arch/arm/plat-omap/debug-leds.c

@@ -281,24 +281,27 @@ static int /* __init */ fpga_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int fpga_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+static int fpga_suspend_noirq(struct device *dev)
 {
 	__raw_writew(~0, &fpga->leds);
 	return 0;
 }
 
-static int fpga_resume_early(struct platform_device *pdev)
+static int fpga_resume_noirq(struct device *dev)
 {
 	__raw_writew(~hw_led_state, &fpga->leds);
 	return 0;
 }
 
+static struct dev_pm_ops fpga_dev_pm_ops = {
+	.suspend_noirq = fpga_suspend_noirq,
+	.resume_noirq = fpga_resume_noirq,
+};
 
 static struct platform_driver led_driver = {
 	.driver.name	= "omap_dbg_led",
+	.driver.pm	= &fpga_dev_pm_ops,
 	.probe		= fpga_probe,
-	.suspend_late	= fpga_suspend_late,
-	.resume_early	= fpga_resume_early,
 };
 
 static int __init fpga_init(void)

arch/arm/plat-omap/gpio.c

@@ -1418,8 +1418,9 @@ static struct irq_chip mpuio_irq_chip = {
 
 #include <linux/platform_device.h>
 
-static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+static int omap_mpuio_suspend_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct gpio_bank	*bank = platform_get_drvdata(pdev);
 	void __iomem		*mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
 	unsigned long		flags;
@@ -1432,8 +1433,9 @@ static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t me
 	return 0;
 }
 
-static int omap_mpuio_resume_early(struct platform_device *pdev)
+static int omap_mpuio_resume_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct gpio_bank	*bank = platform_get_drvdata(pdev);
 	void __iomem		*mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
 	unsigned long		flags;
@@ -1445,14 +1447,18 @@ static int omap_mpuio_resume_early(struct platform_device *pdev)
 	return 0;
 }
 
+static struct dev_pm_ops omap_mpuio_dev_pm_ops = {
+	.suspend_noirq = omap_mpuio_suspend_noirq,
+	.resume_noirq = omap_mpuio_resume_noirq,
+};
+
 /* use platform_driver for this, now that there's no longer any
  * point to sys_device (other than not disturbing old code).
  */
 static struct platform_driver omap_mpuio_driver = {
-	.suspend_late	= omap_mpuio_suspend_late,
-	.resume_early	= omap_mpuio_resume_early,
 	.driver		= {
 		.name	= "mpuio",
+		.pm	= &omap_mpuio_dev_pm_ops,
 	},
 };
 

arch/ia64/include/asm/device.h

@@ -15,4 +15,7 @@ struct dev_archdata {
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_IA64_DEVICE_H */

arch/microblaze/include/asm/device.h

@@ -16,6 +16,9 @@ struct dev_archdata {
 	struct device_node	*of_node;
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_MICROBLAZE_DEVICE_H */
 
 

arch/powerpc/include/asm/device.h

@@ -30,4 +30,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)
 	return ad->of_node;
 }
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_POWERPC_DEVICE_H */

arch/sparc/include/asm/device.h

@@ -32,4 +32,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)
 	return ad->prom_node;
 }
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_SPARC_DEVICE_H */

arch/x86/include/asm/device.h

@@ -13,4 +13,7 @@ struct dma_map_ops *dma_ops;
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_X86_DEVICE_H */

drivers/base/dd.c

@@ -23,6 +23,7 @@
 #include <linux/kthread.h>
 #include <linux/wait.h>
 #include <linux/async.h>
+#include <linux/pm_runtime.h>
 
 #include "base.h"
 #include "power/power.h"
@@ -202,7 +203,10 @@ int driver_probe_device(struct device_driver *drv, struct device *dev)
 	pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
 		 drv->bus->name, __func__, dev_name(dev), drv->name);
 
+	pm_runtime_get_noresume(dev);
+	pm_runtime_barrier(dev);
 	ret = really_probe(dev, drv);
+	pm_runtime_put_sync(dev);
 
 	return ret;
 }
@@ -245,7 +249,9 @@ int device_attach(struct device *dev)
 			ret = 0;
 		}
 	} else {
+		pm_runtime_get_noresume(dev);
 		ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
+		pm_runtime_put_sync(dev);
 	}
 	up(&dev->sem);
 	return ret;
@@ -306,6 +312,9 @@ static void __device_release_driver(struct device *dev)
 
 	drv = dev->driver;
 	if (drv) {
+		pm_runtime_get_noresume(dev);
+		pm_runtime_barrier(dev);
+
 		driver_sysfs_remove(dev);
 
 		if (dev->bus)
@@ -324,6 +333,8 @@ static void __device_release_driver(struct device *dev)
 			blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
 						     BUS_NOTIFY_UNBOUND_DRIVER,
 						     dev);
+
+		pm_runtime_put_sync(dev);
 	}
 }
 

drivers/base/platform.c

@@ -17,6 +17,7 @@
 #include <linux/bootmem.h>
 #include <linux/err.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 
 #include "base.h"
 
@@ -625,30 +626,6 @@ static int platform_legacy_suspend(struct device *dev, pm_message_t mesg)
 	return ret;
 }
 
-static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg)
-{
-	struct platform_driver *pdrv = to_platform_driver(dev->driver);
-	struct platform_device *pdev = to_platform_device(dev);
-	int ret = 0;
-
-	if (dev->driver && pdrv->suspend_late)
-		ret = pdrv->suspend_late(pdev, mesg);
-
-	return ret;
-}
-
-static int platform_legacy_resume_early(struct device *dev)
-{
-	struct platform_driver *pdrv = to_platform_driver(dev->driver);
-	struct platform_device *pdev = to_platform_device(dev);
-	int ret = 0;
-
-	if (dev->driver && pdrv->resume_early)
-		ret = pdrv->resume_early(pdev);
-
-	return ret;
-}
-
 static int platform_legacy_resume(struct device *dev)
 {
 	struct platform_driver *pdrv = to_platform_driver(dev->driver);
@@ -680,6 +657,13 @@ static void platform_pm_complete(struct device *dev)
 		drv->pm->complete(dev);
 }
 
+#else /* !CONFIG_PM_SLEEP */
+
+#define platform_pm_prepare		NULL
+#define platform_pm_complete		NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
 #ifdef CONFIG_SUSPEND
 
 static int platform_pm_suspend(struct device *dev)
@@ -711,8 +695,6 @@ static int platform_pm_suspend_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->suspend_noirq)
 			ret = drv->pm->suspend_noirq(dev);
-	} else {
-		ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND);
 	}
 
 	return ret;
@@ -747,8 +729,6 @@ static int platform_pm_resume_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->resume_noirq)
 			ret = drv->pm->resume_noirq(dev);
-	} else {
-		ret = platform_legacy_resume_early(dev);
 	}
 
 	return ret;
@@ -794,8 +774,6 @@ static int platform_pm_freeze_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->freeze_noirq)
 			ret = drv->pm->freeze_noirq(dev);
-	} else {
-		ret = platform_legacy_suspend_late(dev, PMSG_FREEZE);
 	}
 
 	return ret;
@@ -830,8 +808,6 @@ static int platform_pm_thaw_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->thaw_noirq)
 			ret = drv->pm->thaw_noirq(dev);
-	} else {
-		ret = platform_legacy_resume_early(dev);
 	}
 
 	return ret;
@@ -866,8 +842,6 @@ static int platform_pm_poweroff_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->poweroff_noirq)
 			ret = drv->pm->poweroff_noirq(dev);
-	} else {
-		ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE);
 	}
 
 	return ret;
@@ -902,8 +876,6 @@ static int platform_pm_restore_noirq(struct device *dev)
 	if (drv->pm) {
 		if (drv->pm->restore_noirq)
 			ret = drv->pm->restore_noirq(dev);
-	} else {
-		ret = platform_legacy_resume_early(dev);
 	}
 
 	return ret;
@@ -922,6 +894,31 @@ static int platform_pm_restore_noirq(struct device *dev)
 
 #endif /* !CONFIG_HIBERNATION */
 
+#ifdef CONFIG_PM_RUNTIME
+
+int __weak platform_pm_runtime_suspend(struct device *dev)
+{
+	return -ENOSYS;
+};
+
+int __weak platform_pm_runtime_resume(struct device *dev)
+{
+	return -ENOSYS;
+};
+
+int __weak platform_pm_runtime_idle(struct device *dev)
+{
+	return -ENOSYS;
+};
+
+#else /* !CONFIG_PM_RUNTIME */
+
+#define platform_pm_runtime_suspend NULL
+#define platform_pm_runtime_resume NULL
+#define platform_pm_runtime_idle NULL
+
+#endif /* !CONFIG_PM_RUNTIME */
+
 static const struct dev_pm_ops platform_dev_pm_ops = {
 	.prepare = platform_pm_prepare,
 	.complete = platform_pm_complete,
@@ -937,22 +934,17 @@ static const struct dev_pm_ops platform_dev_pm_ops = {
 	.thaw_noirq = platform_pm_thaw_noirq,
 	.poweroff_noirq = platform_pm_poweroff_noirq,
 	.restore_noirq = platform_pm_restore_noirq,
+	.runtime_suspend = platform_pm_runtime_suspend,
+	.runtime_resume = platform_pm_runtime_resume,
+	.runtime_idle = platform_pm_runtime_idle,
 };
 
-#define PLATFORM_PM_OPS_PTR	(&platform_dev_pm_ops)
-
-#else /* !CONFIG_PM_SLEEP */
-
-#define PLATFORM_PM_OPS_PTR	NULL
-
-#endif /* !CONFIG_PM_SLEEP */
-
 struct bus_type platform_bus_type = {
 	.name		= "platform",
 	.dev_attrs	= platform_dev_attrs,
 	.match		= platform_match,
 	.uevent		= platform_uevent,
-	.pm		= PLATFORM_PM_OPS_PTR,
+	.pm		= &platform_dev_pm_ops,
 };
 EXPORT_SYMBOL_GPL(platform_bus_type);
 

drivers/base/power/Makefile

 obj-$(CONFIG_PM)	+= sysfs.o
 obj-$(CONFIG_PM_SLEEP)	+= main.o
+obj-$(CONFIG_PM_RUNTIME)	+= runtime.o
 obj-$(CONFIG_PM_TRACE_RTC)	+= trace.o
 
 ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG

drivers/base/power/power.h

-static inline void device_pm_init(struct device *dev)
-{
-	dev->power.status = DPM_ON;
-}
+#ifdef CONFIG_PM_RUNTIME
+
+extern void pm_runtime_init(struct device *dev);
+extern void pm_runtime_remove(struct device *dev);
+
+#else /* !CONFIG_PM_RUNTIME */
+
+static inline void pm_runtime_init(struct device *dev) {}
+static inline void pm_runtime_remove(struct device *dev) {}
+
+#endif /* !CONFIG_PM_RUNTIME */
 
 #ifdef CONFIG_PM_SLEEP
 
@@ -16,23 +23,33 @@ static inline struct device *to_device(struct list_head *entry)
 	return container_of(entry, struct device, power.entry);
 }
 
+extern void device_pm_init(struct device *dev);
 extern void device_pm_add(struct device *);
 extern void device_pm_remove(struct device *);
 extern void device_pm_move_before(struct device *, struct device *);
 extern void device_pm_move_after(struct device *, struct device *);
 extern void device_pm_move_last(struct device *);
 
-#else /* CONFIG_PM_SLEEP */
+#else /* !CONFIG_PM_SLEEP */
+
+static inline void device_pm_init(struct device *dev)
+{
+	pm_runtime_init(dev);
+}
+
+static inline void device_pm_remove(struct device *dev)
+{
+	pm_runtime_remove(dev);
+}
 
 static inline void device_pm_add(struct device *dev) {}
-static inline void device_pm_remove(struct device *dev) {}
 static inline void device_pm_move_before(struct device *deva,
 					 struct device *devb) {}
 static inline void device_pm_move_after(struct device *deva,
 					struct device *devb) {}
 static inline void device_pm_move_last(struct device *dev) {}
 
-#endif
+#endif /* !CONFIG_PM_SLEEP */
 
 #ifdef CONFIG_PM
 

drivers/block/floppy.c

@@ -4151,7 +4151,7 @@ static void floppy_device_release(struct device *dev)
 {
 }
 
-static int floppy_resume(struct platform_device *dev)
+static int floppy_resume(struct device *dev)
 {
 	int fdc;
 
@@ -4162,10 +4162,15 @@ static int floppy_resume(struct platform_device *dev)
 	return 0;
 }
 
-static struct platform_driver floppy_driver = {
+static struct dev_pm_ops floppy_pm_ops = {
 	.resume = floppy_resume,
+	.restore = floppy_resume,
+};
+
+static struct platform_driver floppy_driver = {
 	.driver = {
 		.name = "floppy",
+		.pm = &floppy_pm_ops,
 	},
 };
 

drivers/dma/at_hdmac.c

@@ -1166,32 +1166,37 @@ static void at_dma_shutdown(struct platform_device *pdev)
 	clk_disable(atdma->clk);
 }
 
-static int at_dma_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+static int at_dma_suspend_noirq(struct device *dev)
 {
-	struct at_dma	*atdma = platform_get_drvdata(pdev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct at_dma *atdma = platform_get_drvdata(pdev);
 
 	at_dma_off(platform_get_drvdata(pdev));
 	clk_disable(atdma->clk);
 	return 0;
 }
 
-static int at_dma_resume_early(struct platform_device *pdev)
+static int at_dma_resume_noirq(struct device *dev)
 {
-	struct at_dma	*atdma = platform_get_drvdata(pdev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct at_dma *atdma = platform_get_drvdata(pdev);
 
 	clk_enable(atdma->clk);
 	dma_writel(atdma, EN, AT_DMA_ENABLE);
 	return 0;
-
 }
 
+static struct dev_pm_ops at_dma_dev_pm_ops = {
+	.suspend_noirq = at_dma_suspend_noirq,
+	.resume_noirq = at_dma_resume_noirq,
+};
+
 static struct platform_driver at_dma_driver = {
 	.remove		= __exit_p(at_dma_remove),
 	.shutdown	= at_dma_shutdown,
-	.suspend_late	= at_dma_suspend_late,
-	.resume_early	= at_dma_resume_early,
 	.driver = {
 		.name	= "at_hdmac",
+		.pm	= &at_dma_dev_pm_ops,
 	},
 };
 

drivers/dma/dw_dmac.c

@@ -1399,8 +1399,9 @@ static void dw_shutdown(struct platform_device *pdev)
 	clk_disable(dw->clk);
 }
 
-static int dw_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+static int dw_suspend_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct dw_dma	*dw = platform_get_drvdata(pdev);
 
 	dw_dma_off(platform_get_drvdata(pdev));
@@ -1408,23 +1409,27 @@ static int dw_suspend_late(struct platform_device *pdev, pm_message_t mesg)
 	return 0;
 }
 
-static int dw_resume_early(struct platform_device *pdev)
+static int dw_resume_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct dw_dma	*dw = platform_get_drvdata(pdev);
 
 	clk_enable(dw->clk);
 	dma_writel(dw, CFG, DW_CFG_DMA_EN);
 	return 0;
-
 }
 
+static struct dev_pm_ops dw_dev_pm_ops = {
+	.suspend_noirq = dw_suspend_noirq,
+	.resume_noirq = dw_resume_noirq,
+};
+
 static struct platform_driver dw_driver = {
 	.remove		= __exit_p(dw_remove),
 	.shutdown	= dw_shutdown,
-	.suspend_late	= dw_suspend_late,
-	.resume_early	= dw_resume_early,
 	.driver = {
 		.name	= "dw_dmac",
+		.pm	= &dw_dev_pm_ops,
 	},
 };
 

drivers/dma/txx9dmac.c

@@ -1291,17 +1291,18 @@ static void txx9dmac_shutdown(struct platform_device *pdev)
 	txx9dmac_off(ddev);
 }
 
-static int txx9dmac_suspend_late(struct platform_device *pdev,
-				 pm_message_t mesg)
+static int txx9dmac_suspend_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct txx9dmac_dev *ddev = platform_get_drvdata(pdev);
 
 	txx9dmac_off(ddev);
 	return 0;
 }
 
-static int txx9dmac_resume_early(struct platform_device *pdev)
+static int txx9dmac_resume_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct txx9dmac_dev *ddev = platform_get_drvdata(pdev);
 	struct txx9dmac_platform_data *pdata = pdev->dev.platform_data;
 	u32 mcr;
@@ -1314,6 +1315,11 @@ static int txx9dmac_resume_early(struct platform_device *pdev)
 
 }
 
+static struct dev_pm_ops txx9dmac_dev_pm_ops = {
+	.suspend_noirq = txx9dmac_suspend_noirq,
+	.resume_noirq = txx9dmac_resume_noirq,
+};
+
 static struct platform_driver txx9dmac_chan_driver = {
 	.remove		= __exit_p(txx9dmac_chan_remove),
 	.driver = {
@@ -1324,10 +1330,9 @@ static struct platform_driver txx9dmac_chan_driver = {
 static struct platform_driver txx9dmac_driver = {
 	.remove		= __exit_p(txx9dmac_remove),
 	.shutdown	= txx9dmac_shutdown,
-	.suspend_late	= txx9dmac_suspend_late,
-	.resume_early	= txx9dmac_resume_early,
 	.driver = {
 		.name	= "txx9dmac",
+		.pm	= &txx9dmac_dev_pm_ops,
 	},
 };
 

drivers/i2c/busses/i2c-pxa.c

@@ -1134,35 +1134,44 @@ static int __exit i2c_pxa_remove(struct platform_device *dev)
 }
 
 #ifdef CONFIG_PM
-static int i2c_pxa_suspend_late(struct platform_device *dev, pm_message_t state)
+static int i2c_pxa_suspend_noirq(struct device *dev)
 {
-	struct pxa_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct pxa_i2c *i2c = platform_get_drvdata(pdev);
+
 	clk_disable(i2c->clk);
+
 	return 0;
 }
 
-static int i2c_pxa_resume_early(struct platform_device *dev)
+static int i2c_pxa_resume_noirq(struct device *dev)
 {
-	struct pxa_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct pxa_i2c *i2c = platform_get_drvdata(pdev);
 
 	clk_enable(i2c->clk);
 	i2c_pxa_reset(i2c);
 
 	return 0;
 }
+
+static struct dev_pm_ops i2c_pxa_dev_pm_ops = {
+	.suspend_noirq = i2c_pxa_suspend_noirq,
+	.resume_noirq = i2c_pxa_resume_noirq,
+};
+
+#define I2C_PXA_DEV_PM_OPS (&i2c_pxa_dev_pm_ops)
 #else
-#define i2c_pxa_suspend_late NULL
-#define i2c_pxa_resume_early NULL
+#define I2C_PXA_DEV_PM_OPS NULL
 #endif
 
 static struct platform_driver i2c_pxa_driver = {
 	.probe		= i2c_pxa_probe,
 	.remove		= __exit_p(i2c_pxa_remove),
-	.suspend_late	= i2c_pxa_suspend_late,
-	.resume_early	= i2c_pxa_resume_early,
 	.driver		= {
 		.name	= "pxa2xx-i2c",
 		.owner	= THIS_MODULE,
+		.pm	= I2C_PXA_DEV_PM_OPS,
 	},
 	.id_table	= i2c_pxa_id_table,
 };

drivers/i2c/busses/i2c-s3c2410.c

@@ -946,17 +946,20 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM
-static int s3c24xx_i2c_suspend_late(struct platform_device *dev,
-				    pm_message_t msg)
+static int s3c24xx_i2c_suspend_noirq(struct device *dev)
 {
-	struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev);
+
 	i2c->suspended = 1;
+
 	return 0;
 }
 
-static int s3c24xx_i2c_resume(struct platform_device *dev)
+static int s3c24xx_i2c_resume(struct device *dev)
 {
-	struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev);
 
 	i2c->suspended = 0;
 	s3c24xx_i2c_init(i2c);
@@ -964,9 +967,14 @@ static int s3c24xx_i2c_resume(struct platform_device *dev)
 	return 0;
 }
 
+static struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = {
+	.suspend_noirq = s3c24xx_i2c_suspend_noirq,
+	.resume = s3c24xx_i2c_resume,
+};
+
+#define S3C24XX_DEV_PM_OPS (&s3c24xx_i2c_dev_pm_ops)
 #else
-#define s3c24xx_i2c_suspend_late NULL
-#define s3c24xx_i2c_resume NULL
+#define S3C24XX_DEV_PM_OPS NULL
 #endif
 
 /* device driver for platform bus bits */
@@ -985,12 +993,11 @@ MODULE_DEVICE_TABLE(platform, s3c24xx_driver_ids);
 static struct platform_driver s3c24xx_i2c_driver = {
 	.probe		= s3c24xx_i2c_probe,
 	.remove		= s3c24xx_i2c_remove,
-	.suspend_late	= s3c24xx_i2c_suspend_late,
-	.resume		= s3c24xx_i2c_resume,
 	.id_table	= s3c24xx_driver_ids,
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "s3c-i2c",
+		.pm	= S3C24XX_DEV_PM_OPS,
 	},
 };
 

drivers/platform/x86/hp-wmi.c

@@ -53,7 +53,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
 
 static int __init hp_wmi_bios_setup(struct platform_device *device);
 static int __exit hp_wmi_bios_remove(struct platform_device *device);
-static int hp_wmi_resume_handler(struct platform_device *device);
+static int hp_wmi_resume_handler(struct device *device);
 
 struct bios_args {
 	u32 signature;
@@ -94,14 +94,19 @@ static struct rfkill *wifi_rfkill;
 static struct rfkill *bluetooth_rfkill;
 static struct rfkill *wwan_rfkill;
 
+static struct dev_pm_ops hp_wmi_pm_ops = {
+	.resume  = hp_wmi_resume_handler,
+	.restore  = hp_wmi_resume_handler,
+};
+
 static struct platform_driver hp_wmi_driver = {
 	.driver = {
-		   .name = "hp-wmi",
-		   .owner = THIS_MODULE,
+		.name = "hp-wmi",
+		.owner = THIS_MODULE,
+		.pm = &hp_wmi_pm_ops,
 	},
 	.probe = hp_wmi_bios_setup,
 	.remove = hp_wmi_bios_remove,
-	.resume = hp_wmi_resume_handler,
 };
 
 static int hp_wmi_perform_query(int query, int write, int value)
@@ -512,7 +517,7 @@ static int __exit hp_wmi_bios_remove(struct platform_device *device)
 	return 0;
 }
 
-static int hp_wmi_resume_handler(struct platform_device *device)
+static int hp_wmi_resume_handler(struct device *device)
 {
 	/*
 	 * Hardware state may have changed while suspended, so trigger

drivers/usb/musb/musb_core.c

@@ -2167,8 +2167,9 @@ static int __devexit musb_remove(struct platform_device *pdev)
 
 #ifdef	CONFIG_PM
 
-static int musb_suspend(struct platform_device *pdev, pm_message_t message)
+static int musb_suspend(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	unsigned long	flags;
 	struct musb	*musb = dev_to_musb(&pdev->dev);
 
@@ -2195,8 +2196,9 @@ static int musb_suspend(struct platform_device *pdev, pm_message_t message)
 	return 0;
 }
 
-static int musb_resume_early(struct platform_device *pdev)
+static int musb_resume_noirq(struct device *dev)
 {
+	struct platform_device *pdev = to_platform_device(dev);
 	struct musb	*musb = dev_to_musb(&pdev->dev);
 
 	if (!musb->clock)
@@ -2214,9 +2216,14 @@ static int musb_resume_early(struct platform_device *pdev)
 	return 0;
 }
 
+static struct dev_pm_ops musb_dev_pm_ops = {
+	.suspend	= musb_suspend,
+	.resume_noirq	= musb_resume_noirq,
+};
+
+#define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
 #else
-#define	musb_suspend	NULL
-#define	musb_resume_early	NULL
+#define	MUSB_DEV_PM_OPS	NULL
 #endif
 
 static struct platform_driver musb_driver = {
@@ -2224,11 +2231,10 @@ static struct platform_driver musb_driver = {
 		.name		= (char *)musb_driver_name,
 		.bus		= &platform_bus_type,
 		.owner		= THIS_MODULE,
+		.pm		= MUSB_DEV_PM_OPS,
 	},
 	.remove		= __devexit_p(musb_remove),
 	.shutdown	= musb_shutdown,
-	.suspend	= musb_suspend,
-	.resume_early	= musb_resume_early,
 };
 
 /*-------------------------------------------------------------------------*/

include/asm-generic/device.h

@@ -9,4 +9,7 @@
 struct dev_archdata {
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_GENERIC_DEVICE_H */

include/linux/platform_device.h

@@ -22,6 +22,9 @@ struct platform_device {
 	struct resource	* resource;
 
 	struct platform_device_id	*id_entry;
+
+	/* arch specific additions */
+	struct pdev_archdata	archdata;
 };
 
 #define platform_get_device_id(pdev)	((pdev)->id_entry)
@@ -57,8 +60,6 @@ struct platform_driver {
 	int (*remove)(struct platform_device *);
 	void (*shutdown)(struct platform_device *);
 	int (*suspend)(struct platform_device *, pm_message_t state);
-	int (*suspend_late)(struct platform_device *, pm_message_t state);
-	int (*resume_early)(struct platform_device *);
 	int (*resume)(struct platform_device *);
 	struct device_driver driver;
 	struct platform_device_id *id_table;

include/linux/pm.h

@@ -22,6 +22,10 @@
 #define _LINUX_PM_H
 
 #include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/timer.h>
 
 /*
  * Callbacks for platform drivers to implement.
@@ -165,6 +169,28 @@ typedef struct pm_message {
  * It is allowed to unregister devices while the above callbacks are being
  * executed.  However, it is not allowed to unregister a device from within any
  * of its own callbacks.
+ *
+ * There also are the following callbacks related to run-time power management
+ * of devices:
+ *
+ * @runtime_suspend: Prepare the device for a condition in which it won't be
+ *	able to communicate with the CPU(s) and RAM due to power management.
+ *	This need not mean that the device should be put into a low power state.
+ *	For example, if the device is behind a link which is about to be turned
+ *	off, the device may remain at full power.  If the device does go to low
+ *	power and if device_may_wakeup(dev) is true, remote wake-up (i.e., a
+ *	hardware mechanism allowing the device to request a change of its power
+ *	state, such as PCI PME) should be enabled for it.
+ *
+ * @runtime_resume: Put the device into the fully active state in response to a
+ *	wake-up event generated by hardware or at the request of software.  If
+ *	necessary, put the device into the full power state and restore its
+ *	registers, so that it is fully operational.
+ *
+ * @runtime_idle: Device appears to be inactive and it might be put into a low
+ *	power state if all of the necessary conditions are satisfied.  Check
+ *	these conditions and handle the device as appropriate, possibly queueing
+ *	a suspend request for it.  The return value is ignored by the PM core.
  */
 
 struct dev_pm_ops {
@@ -182,8 +208,25 @@ struct dev_pm_ops {
 	int (*thaw_noirq)(struct device *dev);
 	int (*poweroff_noirq)(struct device *dev);
 	int (*restore_noirq)(struct device *dev);
+	int (*runtime_suspend)(struct device *dev);
+	int (*runtime_resume)(struct device *dev);
+	int (*runtime_idle)(struct device *dev);
 };
 
+/*
+ * Use this if you want to use the same suspend and resume callbacks for suspend
+ * to RAM and hibernation.
+ */
+#define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
+struct dev_pm_ops name = { \
+	.suspend = suspend_fn, \
+	.resume = resume_fn, \
+	.freeze = suspend_fn, \
+	.thaw = resume_fn, \
+	.poweroff = suspend_fn, \
+	.restore = resume_fn, \
+}
+
 /**
  * PM_EVENT_ messages
  *
@@ -315,14 +358,80 @@ enum dpm_state {
 	DPM_OFF_IRQ,
 };
 
+/**
+ * Device run-time power management status.
+ *
+ * These status labels are used internally by the PM core to indicate the
+ * current status of a device with respect to the PM core operations.  They do
+ * not reflect the actual power state of the device or its status as seen by the
+ * driver.
+ *
+ * RPM_ACTIVE		Device is fully operational.  Indicates that the device
+ *			bus type's ->runtime_resume() callback has completed
+ *			successfully.
+ *
+ * RPM_SUSPENDED	Device bus type's ->runtime_suspend() callback has
+ *			completed successfully.  The device is regarded as
+ *			suspended.
+ *
+ * RPM_RESUMING		Device bus type's ->runtime_resume() callback is being
+ *			executed.
+ *
+ * RPM_SUSPENDING	Device bus type's ->runtime_suspend() callback is being
+ *			executed.
+ */
+
+enum rpm_status {
+	RPM_ACTIVE = 0,
+	RPM_RESUMING,
+	RPM_SUSPENDED,
+	RPM_SUSPENDING,
+};
+
+/**
+ * Device run-time power management request types.
+ *
+ * RPM_REQ_NONE		Do nothing.
+ *
+ * RPM_REQ_IDLE		Run the device bus type's ->runtime_idle() callback
+ *
+ * RPM_REQ_SUSPEND	Run the device bus type's ->runtime_suspend() callback
+ *
+ * RPM_REQ_RESUME	Run the device bus type's ->runtime_resume() callback
+ */
+
+enum rpm_request {
+	RPM_REQ_NONE = 0,
+	RPM_REQ_IDLE,
+	RPM_REQ_SUSPEND,
+	RPM_REQ_RESUME,
+};
+
 struct dev_pm_info {
 	pm_message_t		power_state;
-	unsigned		can_wakeup:1;
-	unsigned		should_wakeup:1;
+	unsigned int		can_wakeup:1;
+	unsigned int		should_wakeup:1;
 	enum dpm_state		status;		/* Owned by the PM core */
-#ifdef	CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_SLEEP
 	struct list_head	entry;
 #endif
+#ifdef CONFIG_PM_RUNTIME
+	struct timer_list	suspend_timer;
+	unsigned long		timer_expires;
+	struct work_struct	work;
+	wait_queue_head_t	wait_queue;
+	spinlock_t		lock;
+	atomic_t		usage_count;
+	atomic_t		child_count;
+	unsigned int		disable_depth:3;
+	unsigned int		ignore_children:1;
+	unsigned int		idle_notification:1;
+	unsigned int		request_pending:1;
+	unsigned int		deferred_resume:1;
+	enum rpm_request	request;
+	enum rpm_status		runtime_status;
+	int			runtime_error;
+#endif
 };
 
 /*

include/linux/pm_runtime.h

+/*
+ * pm_runtime.h - Device run-time power management helper functions.
+ *
+ * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef _LINUX_PM_RUNTIME_H
+#define _LINUX_PM_RUNTIME_H
+
+#include <linux/device.h>
+#include <linux/pm.h>
+
+#ifdef CONFIG_PM_RUNTIME
+
+extern struct workqueue_struct *pm_wq;
+
+extern int pm_runtime_idle(struct device *dev);
+extern int pm_runtime_suspend(struct device *dev);
+extern int pm_runtime_resume(struct device *dev);
+extern int pm_request_idle(struct device *dev);
+extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
+extern int pm_request_resume(struct device *dev);
+extern int __pm_runtime_get(struct device *dev, bool sync);
+extern int __pm_runtime_put(struct device *dev, bool sync);
+extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
+extern int pm_runtime_barrier(struct device *dev);
+extern void pm_runtime_enable(struct device *dev);
+extern void __pm_runtime_disable(struct device *dev, bool check_resume);
+
+static inline bool pm_children_suspended(struct device *dev)
+{
+	return dev->power.ignore_children
+		|| !atomic_read(&dev->power.child_count);
+}
+
+static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
+{
+	dev->power.ignore_children = enable;
+}
+
+static inline void pm_runtime_get_noresume(struct device *dev)
+{
+	atomic_inc(&dev->power.usage_count);
+}
+
+static inline void pm_runtime_put_noidle(struct device *dev)
+{
+	atomic_add_unless(&dev->power.usage_count, -1, 0);
+}
+
+#else /* !CONFIG_PM_RUNTIME */
+
+static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; }
+static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; }
+static inline int pm_runtime_resume(struct device *dev) { return 0; }
+static inline int pm_request_idle(struct device *dev) { return -ENOSYS; }
+static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
+{
+	return -ENOSYS;
+}
+static inline int pm_request_resume(struct device *dev) { return 0; }
+static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; }
+static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; }
+static inline int __pm_runtime_set_status(struct device *dev,
+					    unsigned int status) { return 0; }
+static inline int pm_runtime_barrier(struct device *dev) { return 0; }
+static inline void pm_runtime_enable(struct device *dev) {}
+static inline void __pm_runtime_disable(struct device *dev, bool c) {}
+
+static inline bool pm_children_suspended(struct device *dev) { return false; }
+static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
+static inline void pm_runtime_get_noresume(struct device *dev) {}
+static inline void pm_runtime_put_noidle(struct device *dev) {}
+
+#endif /* !CONFIG_PM_RUNTIME */
+
+static inline int pm_runtime_get(struct device *dev)
+{
+	return __pm_runtime_get(dev, false);
+}
+
+static inline int pm_runtime_get_sync(struct device *dev)
+{
+	return __pm_runtime_get(dev, true);
+}
+
+static inline int pm_runtime_put(struct device *dev)
+{
+	return __pm_runtime_put(dev, false);
+}
+
+static inline int pm_runtime_put_sync(struct device *dev)
+{
+	return __pm_runtime_put(dev, true);
+}
+
+static inline int pm_runtime_set_active(struct device *dev)
+{
+	return __pm_runtime_set_status(dev, RPM_ACTIVE);
+}
+
+static inline void pm_runtime_set_suspended(struct device *dev)
+{
+	__pm_runtime_set_status(dev, RPM_SUSPENDED);
+}
+
+static inline void pm_runtime_disable(struct device *dev)
+{
+	__pm_runtime_disable(dev, true);
+}
+
+#endif

kernel/power/Kconfig

@@ -208,3 +208,17 @@ config APM_EMULATION
 	  random kernel OOPSes or reboots that don't seem to be related to
 	  anything, try disabling/enabling this option (or disabling/enabling
 	  APM in your BIOS).
+
+config PM_RUNTIME
+	bool "Run-time PM core functionality"
+	depends on PM
+	---help---
+	  Enable functionality allowing I/O devices to be put into energy-saving
+	  (low power) states at run time (or autosuspended) after a specified
+	  period of inactivity and woken up in response to a hardware-generated
+	  wake-up event or a driver's request.
+
+	  Hardware support is generally required for this functionality to work
+	  and the bus type drivers of the buses the devices are on are
+	  responsible for the actual handling of the autosuspend requests and
+	  wake-up events.

kernel/power/hibernate.c

@@ -298,8 +298,8 @@ int hibernation_snapshot(int platform_mode)
 	if (error)
 		return error;
 
-	/* Free memory before shutting down devices. */
-	error = swsusp_shrink_memory();
+	/* Preallocate image memory before shutting down devices. */
+	error = hibernate_preallocate_memory();
 	if (error)
 		goto Close;
 
@@ -315,6 +315,10 @@ int hibernation_snapshot(int platform_mode)
 	/* Control returns here after successful restore */
 
  Resume_devices:
+	/* We may need to release the preallocated image pages here. */
+	if (error || !in_suspend)
+		swsusp_free();
+
 	dpm_resume_end(in_suspend ?
 		(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
 	resume_console();
@@ -460,11 +464,11 @@ int hibernation_platform_enter(void)
 
 	error = hibernation_ops->prepare();
 	if (error)
-		goto Platofrm_finish;
+		goto Platform_finish;
 
 	error = disable_nonboot_cpus();
 	if (error)
-		goto Platofrm_finish;
+		goto Platform_finish;
 
 	local_irq_disable();
 	sysdev_suspend(PMSG_HIBERNATE);
@@ -476,7 +480,7 @@ int hibernation_platform_enter(void)
 	 * We don't need to reenable the nonboot CPUs or resume consoles, since
 	 * the system is going to be halted anyway.
 	 */
- Platofrm_finish:
+ Platform_finish:
 	hibernation_ops->finish();
 
 	dpm_suspend_noirq(PMSG_RESTORE);
@@ -578,7 +582,10 @@ int hibernate(void)
 		goto Thaw;
 
 	error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
-	if (in_suspend && !error) {
+	if (error)
+		goto Thaw;
+
+	if (in_suspend) {
 		unsigned int flags = 0;
 
 		if (hibernation_mode == HIBERNATION_PLATFORM)
@@ -590,8 +597,8 @@ int hibernate(void)
 			power_down();
 	} else {
 		pr_debug("PM: Image restored successfully.\n");
-		swsusp_free();
 	}
+
  Thaw:
 	thaw_processes();
  Finish:

kernel/power/main.c

@@ -11,6 +11,7 @@
 #include <linux/kobject.h>
 #include <linux/string.h>
 #include <linux/resume-trace.h>
+#include <linux/workqueue.h>
 
 #include "power.h"
 
@@ -217,8 +218,24 @@ static struct attribute_group attr_group = {
 	.attrs = g,
 };
 
+#ifdef CONFIG_PM_RUNTIME
+struct workqueue_struct *pm_wq;
+
+static int __init pm_start_workqueue(void)
+{
+	pm_wq = create_freezeable_workqueue("pm");
+
+	return pm_wq ? 0 : -ENOMEM;
+}
+#else
+static inline int pm_start_workqueue(void) { return 0; }
+#endif
+
 static int __init pm_init(void)
 {
+	int error = pm_start_workqueue();
+	if (error)
+		return error;
 	power_kobj = kobject_create_and_add("power", NULL);
 	if (!power_kobj)
 		return -ENOMEM;

kernel/power/power.h

@@ -74,7 +74,7 @@ extern asmlinkage int swsusp_arch_resume(void);
 
 extern int create_basic_memory_bitmaps(void);
 extern void free_basic_memory_bitmaps(void);
-extern int swsusp_shrink_memory(void);
+extern int hibernate_preallocate_memory(void);
 
 /**
  *	Auxiliary structure used for reading the snapshot image data and