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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2013-10-01 18:22:00 +0200
committerJonathan Cameron <jic23@kernel.org>2013-10-01 23:06:15 +0200
commit476b9547e872c709c07a45bd47301ce7236f3dc1 (patch)
treed5e3bc0c92e9653becc6ff794c229abda6bdd6af /drivers/rtc
parentStaging/iio: add TODO reminder (diff)
downloadlinux-476b9547e872c709c07a45bd47301ce7236f3dc1.tar.xz
linux-476b9547e872c709c07a45bd47301ce7236f3dc1.zip
HID RTC: Open sensor hub open close
Open sensor hub when module is loaded and close when module is removed. This helps saving power by opening HID transport only when there is an user. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-hid-sensor-time.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c
index 4e2a81854f51..45560ffb038d 100644
--- a/drivers/rtc/rtc-hid-sensor-time.c
+++ b/drivers/rtc/rtc-hid-sensor-time.c
@@ -275,6 +275,12 @@ static int hid_time_probe(struct platform_device *pdev)
return ret;
}
+ ret = sensor_hub_device_open(hsdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to open sensor hub device!\n");
+ goto err_open;
+ }
+
time_state->rtc = devm_rtc_device_register(&pdev->dev,
"hid-sensor-time", &hid_time_rtc_ops,
THIS_MODULE);
@@ -282,17 +288,24 @@ static int hid_time_probe(struct platform_device *pdev)
if (IS_ERR_OR_NULL(time_state->rtc)) {
ret = time_state->rtc ? PTR_ERR(time_state->rtc) : -ENODEV;
time_state->rtc = NULL;
- sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
dev_err(&pdev->dev, "rtc device register failed!\n");
+ goto err_rtc;
}
return ret;
+
+err_rtc:
+ sensor_hub_device_close(hsdev);
+err_open:
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
+ return ret;
}
static int hid_time_remove(struct platform_device *pdev)
{
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ sensor_hub_device_close(hsdev);
sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
return 0;