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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2009-06-16 10:30:36 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-16 10:31:15 +0200
commit524dbcdad7a84a054b4458aa94e152ffb2bfabbd (patch)
tree1d61eab2c2ba632b01f254904adfcd1a71c761ab /arch/s390/appldata
parent58872d5f367876a81dcda82465381d80d321a81d (diff)
downloadlinux-linaro-android-524dbcdad7a84a054b4458aa94e152ffb2bfabbd.tar.gz
[S390] pm: appldata power management callbacks
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/appldata')
-rw-r--r--arch/s390/appldata/appldata_base.c119
1 files changed, 115 insertions, 4 deletions
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 1dfc7100c7e..264528e4f58 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -5,7 +5,7 @@
* Exports appldata_register_ops() and appldata_unregister_ops() for the
* data gathering modules.
*
- * Copyright IBM Corp. 2003, 2008
+ * Copyright IBM Corp. 2003, 2009
*
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
@@ -26,6 +26,8 @@
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/workqueue.h>
+#include <linux/suspend.h>
+#include <linux/platform_device.h>
#include <asm/appldata.h>
#include <asm/timer.h>
#include <asm/uaccess.h>
@@ -41,6 +43,9 @@
#define TOD_MICRO 0x01000 /* nr. of TOD clock units
for 1 microsecond */
+
+static struct platform_device *appldata_pdev;
+
/*
* /proc entries (sysctl)
*/
@@ -86,6 +91,7 @@ static atomic_t appldata_expire_count = ATOMIC_INIT(0);
static DEFINE_SPINLOCK(appldata_timer_lock);
static int appldata_interval = APPLDATA_CPU_INTERVAL;
static int appldata_timer_active;
+static int appldata_timer_suspended = 0;
/*
* Work queue
@@ -475,6 +481,93 @@ void appldata_unregister_ops(struct appldata_ops *ops)
/********************** module-ops management <END> **************************/
+/**************************** suspend / resume *******************************/
+static int appldata_freeze(struct device *dev)
+{
+ struct appldata_ops *ops;
+ int rc;
+ struct list_head *lh;
+
+ get_online_cpus();
+ spin_lock(&appldata_timer_lock);
+ if (appldata_timer_active) {
+ __appldata_vtimer_setup(APPLDATA_DEL_TIMER);
+ appldata_timer_suspended = 1;
+ }
+ spin_unlock(&appldata_timer_lock);
+ put_online_cpus();
+
+ mutex_lock(&appldata_ops_mutex);
+ list_for_each(lh, &appldata_ops_list) {
+ ops = list_entry(lh, struct appldata_ops, list);
+ if (ops->active == 1) {
+ rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
+ (unsigned long) ops->data, ops->size,
+ ops->mod_lvl);
+ if (rc != 0)
+ pr_err("Stopping the data collection for %s "
+ "failed with rc=%d\n", ops->name, rc);
+ }
+ }
+ mutex_unlock(&appldata_ops_mutex);
+ return 0;
+}
+
+static int appldata_restore(struct device *dev)
+{
+ struct appldata_ops *ops;
+ int rc;
+ struct list_head *lh;
+
+ get_online_cpus();
+ spin_lock(&appldata_timer_lock);
+ if (appldata_timer_suspended) {
+ __appldata_vtimer_setup(APPLDATA_ADD_TIMER);
+ appldata_timer_suspended = 0;
+ }
+ spin_unlock(&appldata_timer_lock);
+ put_online_cpus();
+
+ mutex_lock(&appldata_ops_mutex);
+ list_for_each(lh, &appldata_ops_list) {
+ ops = list_entry(lh, struct appldata_ops, list);
+ if (ops->active == 1) {
+ ops->callback(ops->data); // init record
+ rc = appldata_diag(ops->record_nr,
+ APPLDATA_START_INTERVAL_REC,
+ (unsigned long) ops->data, ops->size,
+ ops->mod_lvl);
+ if (rc != 0) {
+ pr_err("Starting the data collection for %s "
+ "failed with rc=%d\n", ops->name, rc);
+ }
+ }
+ }
+ mutex_unlock(&appldata_ops_mutex);
+ return 0;
+}
+
+static int appldata_thaw(struct device *dev)
+{
+ return appldata_restore(dev);
+}
+
+static struct dev_pm_ops appldata_pm_ops = {
+ .freeze = appldata_freeze,
+ .thaw = appldata_thaw,
+ .restore = appldata_restore,
+};
+
+static struct platform_driver appldata_pdrv = {
+ .driver = {
+ .name = "appldata",
+ .owner = THIS_MODULE,
+ .pm = &appldata_pm_ops,
+ },
+};
+/************************* suspend / resume <END> ****************************/
+
+
/******************************* init / exit *********************************/
static void __cpuinit appldata_online_cpu(int cpu)
@@ -531,11 +624,23 @@ static struct notifier_block __cpuinitdata appldata_nb = {
*/
static int __init appldata_init(void)
{
- int i;
+ int i, rc;
+
+ rc = platform_driver_register(&appldata_pdrv);
+ if (rc)
+ return rc;
+ appldata_pdev = platform_device_register_simple("appldata", -1, NULL,
+ 0);
+ if (IS_ERR(appldata_pdev)) {
+ rc = PTR_ERR(appldata_pdev);
+ goto out_driver;
+ }
appldata_wq = create_singlethread_workqueue("appldata");
- if (!appldata_wq)
- return -ENOMEM;
+ if (!appldata_wq) {
+ rc = -ENOMEM;
+ goto out_device;
+ }
get_online_cpus();
for_each_online_cpu(i)
@@ -547,6 +652,12 @@ static int __init appldata_init(void)
appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
return 0;
+
+out_device:
+ platform_device_unregister(appldata_pdev);
+out_driver:
+ platform_driver_unregister(&appldata_pdrv);
+ return rc;
}
__initcall(appldata_init);