hwmon: lis3: pm_runtime support
Add pm_runtime support to lis3 core driver.
Add pm_runtime support to lis3 i2c driver.
spi and hp_accel drivers are not yet supported. Old always
on functionality remains for those.
For sysfs there is 5 second delay before turning off the
chip to avoid long ramp up delay.
Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
diff --git a/drivers/hwmon/lis3lv02d_i2c.c b/drivers/hwmon/lis3lv02d_i2c.c
index c6f3f34..d520956 100644
--- a/drivers/hwmon/lis3lv02d_i2c.c
+++ b/drivers/hwmon/lis3lv02d_i2c.c
@@ -29,6 +29,7 @@
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
#include "lis3lv02d.h"
#define DRV_NAME "lis3lv02d_i2c"
@@ -94,6 +95,7 @@
lis3_dev.write = lis3_i2c_write;
lis3_dev.irq = client->irq;
lis3_dev.ac = lis3lv02d_axis_map;
+ lis3_dev.pm_dev = &client->dev;
i2c_set_clientdata(client, &lis3_dev);
ret = lis3lv02d_init_device(&lis3_dev);
@@ -103,21 +105,20 @@
static int __devexit lis3lv02d_i2c_remove(struct i2c_client *client)
{
- struct lis3lv02d *lis3 = i2c_get_clientdata(client);
struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
if (pdata && pdata->release_resources)
pdata->release_resources();
lis3lv02d_joystick_disable();
- lis3lv02d_poweroff(lis3);
return lis3lv02d_remove_fs(&lis3_dev);
}
#ifdef CONFIG_PM
-static int lis3lv02d_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
+static int lis3lv02d_i2c_suspend(struct device *dev)
{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct lis3lv02d *lis3 = i2c_get_clientdata(client);
if (!lis3->pdata || !lis3->pdata->wakeup_flags)
@@ -125,18 +126,21 @@
return 0;
}
-static int lis3lv02d_i2c_resume(struct i2c_client *client)
+static int lis3lv02d_i2c_resume(struct device *dev)
{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct lis3lv02d *lis3 = i2c_get_clientdata(client);
- if (!lis3->pdata || !lis3->pdata->wakeup_flags)
+ /*
+ * pm_runtime documentation says that devices should always
+ * be powered on at resume. Pm_runtime turns them off after system
+ * wide resume is complete.
+ */
+ if (!lis3->pdata || !lis3->pdata->wakeup_flags ||
+ pm_runtime_suspended(dev))
lis3lv02d_poweron(lis3);
- return 0;
-}
-static void lis3lv02d_i2c_shutdown(struct i2c_client *client)
-{
- lis3lv02d_i2c_suspend(client, PMSG_SUSPEND);
+ return 0;
}
#else
#define lis3lv02d_i2c_suspend NULL
@@ -144,6 +148,24 @@
#define lis3lv02d_i2c_shutdown NULL
#endif
+static int lis3_i2c_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct lis3lv02d *lis3 = i2c_get_clientdata(client);
+
+ lis3lv02d_poweroff(lis3);
+ return 0;
+}
+
+static int lis3_i2c_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct lis3lv02d *lis3 = i2c_get_clientdata(client);
+
+ lis3lv02d_poweron(lis3);
+ return 0;
+}
+
static const struct i2c_device_id lis3lv02d_id[] = {
{"lis3lv02d", 0 },
{}
@@ -151,14 +173,20 @@
MODULE_DEVICE_TABLE(i2c, lis3lv02d_id);
+static const struct dev_pm_ops lis3_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(lis3lv02d_i2c_suspend,
+ lis3lv02d_i2c_resume)
+ SET_RUNTIME_PM_OPS(lis3_i2c_runtime_suspend,
+ lis3_i2c_runtime_resume,
+ NULL)
+};
+
static struct i2c_driver lis3lv02d_i2c_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .pm = &lis3_pm_ops,
},
- .suspend = lis3lv02d_i2c_suspend,
- .shutdown = lis3lv02d_i2c_shutdown,
- .resume = lis3lv02d_i2c_resume,
.probe = lis3lv02d_i2c_probe,
.remove = __devexit_p(lis3lv02d_i2c_remove),
.id_table = lis3lv02d_id,