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path: root/drivers/amba/bus.c
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Diffstat (limited to 'drivers/amba/bus.c')
-rw-r--r--drivers/amba/bus.c213
1 files changed, 17 insertions, 196 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index c4876ac9151a..9e6029105607 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -83,162 +83,6 @@ 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;
-}
-
-#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_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;
-}
-
-#else /* !CONFIG_SUSPEND */
-
-#define amba_pm_suspend NULL
-#define amba_pm_resume NULL
-
-#endif /* !CONFIG_SUSPEND */
-
-#ifdef CONFIG_HIBERNATE_CALLBACKS
-
-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_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_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_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;
-}
-
-#else /* !CONFIG_HIBERNATE_CALLBACKS */
-
-#define amba_pm_freeze NULL
-#define amba_pm_thaw NULL
-#define amba_pm_poweroff NULL
-#define amba_pm_restore NULL
-
-#endif /* !CONFIG_HIBERNATE_CALLBACKS */
-
#ifdef CONFIG_PM_RUNTIME
/*
* Hooks to provide runtime PM of the pclk (bus clock). It is safe to
@@ -251,7 +95,7 @@ static int amba_pm_runtime_suspend(struct device *dev)
int ret = pm_generic_runtime_suspend(dev);
if (ret == 0 && dev->driver)
- clk_disable(pcdev->pclk);
+ clk_disable_unprepare(pcdev->pclk);
return ret;
}
@@ -262,7 +106,7 @@ static int amba_pm_runtime_resume(struct device *dev)
int ret;
if (dev->driver) {
- ret = clk_enable(pcdev->pclk);
+ ret = clk_prepare_enable(pcdev->pclk);
/* Failure is probably fatal to the system, but... */
if (ret)
return ret;
@@ -272,15 +116,13 @@ static int amba_pm_runtime_resume(struct device *dev)
}
#endif
-#ifdef CONFIG_PM
-
static const struct dev_pm_ops amba_pm = {
- .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 = pm_generic_suspend,
+ .resume = pm_generic_resume,
+ .freeze = pm_generic_freeze,
+ .thaw = pm_generic_thaw,
+ .poweroff = pm_generic_poweroff,
+ .restore = pm_generic_restore,
SET_RUNTIME_PM_OPS(
amba_pm_runtime_suspend,
amba_pm_runtime_resume,
@@ -288,14 +130,6 @@ static const struct dev_pm_ops amba_pm = {
)
};
-#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".
@@ -305,7 +139,7 @@ struct bus_type amba_bustype = {
.dev_attrs = amba_dev_attrs,
.match = amba_match,
.uevent = amba_uevent,
- .pm = AMBA_PM,
+ .pm = &amba_pm,
};
static int __init amba_init(void)
@@ -317,36 +151,23 @@ postcore_initcall(amba_init);
static int amba_get_enable_pclk(struct amba_device *pcdev)
{
- struct clk *pclk = clk_get(&pcdev->dev, "apb_pclk");
int ret;
- pcdev->pclk = pclk;
-
- if (IS_ERR(pclk))
- return PTR_ERR(pclk);
+ pcdev->pclk = clk_get(&pcdev->dev, "apb_pclk");
+ if (IS_ERR(pcdev->pclk))
+ return PTR_ERR(pcdev->pclk);
- ret = clk_prepare(pclk);
- if (ret) {
- clk_put(pclk);
- return ret;
- }
-
- ret = clk_enable(pclk);
- if (ret) {
- clk_unprepare(pclk);
- clk_put(pclk);
- }
+ ret = clk_prepare_enable(pcdev->pclk);
+ if (ret)
+ clk_put(pcdev->pclk);
return ret;
}
static void amba_put_disable_pclk(struct amba_device *pcdev)
{
- struct clk *pclk = pcdev->pclk;
-
- clk_disable(pclk);
- clk_unprepare(pclk);
- clk_put(pclk);
+ clk_disable_unprepare(pcdev->pclk);
+ clk_put(pcdev->pclk);
}
/*