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path: root/drivers/base/power/clock_ops.c
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Diffstat (limited to 'drivers/base/power/clock_ops.c')
-rw-r--r--drivers/base/power/clock_ops.c127
1 files changed, 59 insertions, 68 deletions
diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index b97294e2d95..5f0f85d5c57 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -10,18 +10,13 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/pm.h>
-#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/err.h>
#ifdef CONFIG_PM
-struct pm_clk_data {
- struct list_head clock_list;
- spinlock_t lock;
-};
-
enum pce_status {
PCE_STATUS_NONE = 0,
PCE_STATUS_ACQUIRED,
@@ -36,11 +31,6 @@ struct pm_clock_entry {
enum pce_status status;
};
-static struct pm_clk_data *__to_pcd(struct device *dev)
-{
- return dev ? dev->power.subsys_data : NULL;
-}
-
/**
* pm_clk_acquire - Acquire a device clock.
* @dev: Device whose clock is to be acquired.
@@ -67,10 +57,10 @@ static void pm_clk_acquire(struct device *dev, struct pm_clock_entry *ce)
*/
int pm_clk_add(struct device *dev, const char *con_id)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
- if (!pcd)
+ if (!psd)
return -EINVAL;
ce = kzalloc(sizeof(*ce), GFP_KERNEL);
@@ -91,9 +81,9 @@ int pm_clk_add(struct device *dev, const char *con_id)
pm_clk_acquire(dev, ce);
- spin_lock_irq(&pcd->lock);
- list_add_tail(&ce->node, &pcd->clock_list);
- spin_unlock_irq(&pcd->lock);
+ spin_lock_irq(&psd->lock);
+ list_add_tail(&ce->node, &psd->clock_list);
+ spin_unlock_irq(&psd->lock);
return 0;
}
@@ -114,9 +104,7 @@ static void __pm_clk_remove(struct pm_clock_entry *ce)
clk_put(ce->clk);
}
- if (ce->con_id)
- kfree(ce->con_id);
-
+ kfree(ce->con_id);
kfree(ce);
}
@@ -130,15 +118,15 @@ static void __pm_clk_remove(struct pm_clock_entry *ce)
*/
void pm_clk_remove(struct device *dev, const char *con_id)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
- if (!pcd)
+ if (!psd)
return;
- spin_lock_irq(&pcd->lock);
+ spin_lock_irq(&psd->lock);
- list_for_each_entry(ce, &pcd->clock_list, node) {
+ list_for_each_entry(ce, &psd->clock_list, node) {
if (!con_id && !ce->con_id)
goto remove;
else if (!con_id || !ce->con_id)
@@ -147,12 +135,12 @@ void pm_clk_remove(struct device *dev, const char *con_id)
goto remove;
}
- spin_unlock_irq(&pcd->lock);
+ spin_unlock_irq(&psd->lock);
return;
remove:
list_del(&ce->node);
- spin_unlock_irq(&pcd->lock);
+ spin_unlock_irq(&psd->lock);
__pm_clk_remove(ce);
}
@@ -161,23 +149,27 @@ void pm_clk_remove(struct device *dev, const char *con_id)
* pm_clk_init - Initialize a device's list of power management clocks.
* @dev: Device to initialize the list of PM clocks for.
*
- * Allocate a struct pm_clk_data object, initialize its lock member and
- * make the @dev's power.subsys_data field point to it.
+ * Initialize the lock and clock_list members of the device's pm_subsys_data
+ * object.
*/
-int pm_clk_init(struct device *dev)
+void pm_clk_init(struct device *dev)
{
- struct pm_clk_data *pcd;
-
- pcd = kzalloc(sizeof(*pcd), GFP_KERNEL);
- if (!pcd) {
- dev_err(dev, "Not enough memory for PM clock data.\n");
- return -ENOMEM;
- }
+ struct pm_subsys_data *psd = dev_to_psd(dev);
+ if (psd)
+ INIT_LIST_HEAD(&psd->clock_list);
+}
- INIT_LIST_HEAD(&pcd->clock_list);
- spin_lock_init(&pcd->lock);
- dev->power.subsys_data = pcd;
- return 0;
+/**
+ * pm_clk_create - Create and initialize a device's list of PM clocks.
+ * @dev: Device to create and initialize the list of PM clocks for.
+ *
+ * Allocate a struct pm_subsys_data object, initialize its lock and clock_list
+ * members and make the @dev's power.subsys_data field point to it.
+ */
+int pm_clk_create(struct device *dev)
+{
+ int ret = dev_pm_get_subsys_data(dev);
+ return ret < 0 ? ret : 0;
}
/**
@@ -185,29 +177,28 @@ int pm_clk_init(struct device *dev)
* @dev: Device to destroy the list of PM clocks for.
*
* Clear the @dev's power.subsys_data field, remove the list of clock entries
- * from the struct pm_clk_data object pointed to by it before and free
+ * from the struct pm_subsys_data object pointed to by it before and free
* that object.
*/
void pm_clk_destroy(struct device *dev)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce, *c;
struct list_head list;
- if (!pcd)
+ if (!psd)
return;
- dev->power.subsys_data = NULL;
INIT_LIST_HEAD(&list);
- spin_lock_irq(&pcd->lock);
+ spin_lock_irq(&psd->lock);
- list_for_each_entry_safe_reverse(ce, c, &pcd->clock_list, node)
+ list_for_each_entry_safe_reverse(ce, c, &psd->clock_list, node)
list_move(&ce->node, &list);
- spin_unlock_irq(&pcd->lock);
+ spin_unlock_irq(&psd->lock);
- kfree(pcd);
+ dev_pm_put_subsys_data(dev);
list_for_each_entry_safe_reverse(ce, c, &list, node) {
list_del(&ce->node);
@@ -225,25 +216,25 @@ void pm_clk_destroy(struct device *dev)
*/
int pm_clk_suspend(struct device *dev)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
unsigned long flags;
dev_dbg(dev, "%s()\n", __func__);
- if (!pcd)
+ if (!psd)
return 0;
- spin_lock_irqsave(&pcd->lock, flags);
+ spin_lock_irqsave(&psd->lock, flags);
- list_for_each_entry_reverse(ce, &pcd->clock_list, node) {
+ list_for_each_entry_reverse(ce, &psd->clock_list, node) {
if (ce->status < PCE_STATUS_ERROR) {
clk_disable(ce->clk);
ce->status = PCE_STATUS_ACQUIRED;
}
}
- spin_unlock_irqrestore(&pcd->lock, flags);
+ spin_unlock_irqrestore(&psd->lock, flags);
return 0;
}
@@ -254,25 +245,25 @@ int pm_clk_suspend(struct device *dev)
*/
int pm_clk_resume(struct device *dev)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
unsigned long flags;
dev_dbg(dev, "%s()\n", __func__);
- if (!pcd)
+ if (!psd)
return 0;
- spin_lock_irqsave(&pcd->lock, flags);
+ spin_lock_irqsave(&psd->lock, flags);
- list_for_each_entry(ce, &pcd->clock_list, node) {
+ list_for_each_entry(ce, &psd->clock_list, node) {
if (ce->status < PCE_STATUS_ERROR) {
clk_enable(ce->clk);
ce->status = PCE_STATUS_ENABLED;
}
}
- spin_unlock_irqrestore(&pcd->lock, flags);
+ spin_unlock_irqrestore(&psd->lock, flags);
return 0;
}
@@ -310,7 +301,7 @@ static int pm_clk_notify(struct notifier_block *nb,
if (dev->pm_domain)
break;
- error = pm_clk_init(dev);
+ error = pm_clk_create(dev);
if (error)
break;
@@ -345,22 +336,22 @@ static int pm_clk_notify(struct notifier_block *nb,
*/
int pm_clk_suspend(struct device *dev)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
unsigned long flags;
dev_dbg(dev, "%s()\n", __func__);
/* If there is no driver, the clocks are already disabled. */
- if (!pcd || !dev->driver)
+ if (!psd || !dev->driver)
return 0;
- spin_lock_irqsave(&pcd->lock, flags);
+ spin_lock_irqsave(&psd->lock, flags);
- list_for_each_entry_reverse(ce, &pcd->clock_list, node)
+ list_for_each_entry_reverse(ce, &psd->clock_list, node)
clk_disable(ce->clk);
- spin_unlock_irqrestore(&pcd->lock, flags);
+ spin_unlock_irqrestore(&psd->lock, flags);
return 0;
}
@@ -371,22 +362,22 @@ int pm_clk_suspend(struct device *dev)
*/
int pm_clk_resume(struct device *dev)
{
- struct pm_clk_data *pcd = __to_pcd(dev);
+ struct pm_subsys_data *psd = dev_to_psd(dev);
struct pm_clock_entry *ce;
unsigned long flags;
dev_dbg(dev, "%s()\n", __func__);
/* If there is no driver, the clocks should remain disabled. */
- if (!pcd || !dev->driver)
+ if (!psd || !dev->driver)
return 0;
- spin_lock_irqsave(&pcd->lock, flags);
+ spin_lock_irqsave(&psd->lock, flags);
- list_for_each_entry(ce, &pcd->clock_list, node)
+ list_for_each_entry(ce, &psd->clock_list, node)
clk_enable(ce->clk);
- spin_unlock_irqrestore(&pcd->lock, flags);
+ spin_unlock_irqrestore(&psd->lock, flags);
return 0;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-21 14:37:09 +0000