[PATCH] i2c_hid: enable i2c-hid devices to suspend/resume asynchronously

From	"Fu, Zhonghui" <zhonghui.fu@linux.intel.com>
Newsgroups	linux.kernel
Subject	[PATCH] i2c_hid: enable i2c-hid devices to suspend/resume asynchronously
Date	2016-05-19 04:50 +0200
Message-ID	<rAmc9-2ff-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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i2c-hid devices' suspend/resume are usually time-consuming process.
For example, the touch controller(i2c-ATML1000:00) on ASUS T100 tablet
takes about 160ms for suspending and 120ms for resuming. This patch
enables i2c-hid devices to suspend/resume asynchronously. This will
take advantage of multicore and speed up system suspend/resume process.

Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
---
 drivers/hid/i2c-hid/i2c-hid.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 2e021ba..cc41e1e 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -1020,6 +1020,7 @@ static int i2c_hid_probe(struct i2c_client *client,
 	pm_runtime_get_noresume(&client->dev);
 	pm_runtime_set_active(&client->dev);
 	pm_runtime_enable(&client->dev);
+	device_enable_async_suspend(&client->dev);
 
 	ret = i2c_hid_fetch_hid_descriptor(ihid);
 	if (ret < 0)
-- 1.7.1

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[PATCH] i2c_hid: enable i2c-hid devices to suspend/resume  asynchronously "Fu, Zhonghui" <zhonghui.fu@linux.intel.com> - 2016-05-19 04:50 +0200
  Re: [PATCH] i2c_hid: enable i2c-hid devices to suspend/resume  asynchronously Mika Westerberg <mika.westerberg@linux.intel.com> - 2016-05-23 10:30 +0200
  Re: [PATCH] i2c_hid: enable i2c-hid devices to suspend/resume  asynchronously Jiri Kosina <jikos@kernel.org> - 2016-05-24 12:30 +0200

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