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greybus: vibrator: integrate runtime pm 

Integrate greybus drivers with the Linux Kernel RuntimePM framework
for vibrator driver.

Testing Done: AP side (kernel) can control the vibrator driver with
suspend and resume.

Signed-off-by: Ann Chen <chen_ann@projectara.com>
Reviewed-by: David Lin <dtwlin@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Ann Chen 2016-07-22 15:33:55 +08:00 committed by Greg Kroah-Hartman
parent 553cba82b1
commit 633e45eaac
1 changed files with 34 additions and 4 deletions
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38
drivers/staging/greybus/vibrator.c
View File

@ -13,6 +13,8 @@
#include <linux/device.h>
#include <linux/kdev_t.h>
#include <linux/idr.h>
#include <linux/pm_runtime.h>
#include "greybus.h"
struct gb_vibrator_device {
@ -32,16 +34,37 @@ struct gb_vibrator_on_request {
static int turn_on(struct gb_vibrator_device *vib, u16 timeout_ms)
{
struct gb_vibrator_on_request request;
struct gb_bundle *bundle = vib->connection->bundle;
int ret;
ret = gb_pm_runtime_get_sync(bundle);
if (ret)
return ret;
request.timeout_ms = cpu_to_le16(timeout_ms);
return gb_operation_sync(vib->connection, GB_VIBRATOR_TYPE_ON,
&request, sizeof(request), NULL, 0);
ret = gb_operation_sync(vib->connection, GB_VIBRATOR_TYPE_ON,
&request, sizeof(request), NULL, 0);
gb_pm_runtime_put_autosuspend(bundle);
return ret;
}
static int turn_off(struct gb_vibrator_device *vib)
{
return gb_operation_sync(vib->connection, GB_VIBRATOR_TYPE_OFF,
NULL, 0, NULL, 0);
struct gb_bundle *bundle = vib->connection->bundle;
int ret;
ret = gb_pm_runtime_get_sync(bundle);
if (ret)
return ret;
ret = gb_operation_sync(vib->connection, GB_VIBRATOR_TYPE_OFF,
NULL, 0, NULL, 0);
gb_pm_runtime_put_autosuspend(bundle);
return ret;
}
static ssize_t timeout_store(struct device *dev, struct device_attribute *attr,
@ -151,6 +174,8 @@ static int gb_vibrator_probe(struct gb_bundle *bundle,
}
#endif
gb_pm_runtime_put_autosuspend(bundle);
return 0;
err_ida_remove:
@ -168,6 +193,11 @@ err_free_vib:
static void gb_vibrator_disconnect(struct gb_bundle *bundle)
{
struct gb_vibrator_device *vib = greybus_get_drvdata(bundle);
int ret;
ret = gb_pm_runtime_get_sync(bundle);
if (ret)
gb_pm_runtime_get_noresume(bundle);
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3,11,0)
sysfs_remove_group(&vib->dev->kobj, vibrator_groups[0]);