diff options
| author | Guohua Zhong <ghzhong@yifangdigital.com> | 2016-06-21 12:27:45 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2016-06-21 13:07:15 +0200 |
| commit | d9f448e3d71f3a703977196fa73be533b4b85adc (patch) | |
| tree | 5a55492073415a2be8c1984b9518f8a39822279f /drivers/hid | |
| parent | HID: i2c_hid: enable i2c-hid devices to suspend/resume asynchronously (diff) | |
| download | linux-d9f448e3d71f3a703977196fa73be533b4b85adc.tar.xz linux-d9f448e3d71f3a703977196fa73be533b4b85adc.zip | |
HID: i2c-hid: set power sleep before shutdown
Add i2c_hid_shutdown for i2c-hid driver to send suspend cmd & free
irq before device shutdown.
Some HW design (i.e. Umaro, a chromebook model) is that the power to
i2c hid device won't down after device shutdown. Also the i2c-hid driver
do not send suspend cmd to the hid i2c device and free its irq before
shutdown.So if We touch the touchscreen or some other i2c hid device,
the power consumtion will be go up even when the device is in shutdown
state.
Though the root cause maybe a HW issue. But it seems that it is a
good pratice to set power sleep for i2c-hid device before shutdown.
Signed-off-by: Guohua Zhong <ghzhong@yifangdigital.com>
Acked-By: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index cc41e1ef8255..b3ec4f2de875 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -1107,6 +1107,14 @@ static int i2c_hid_remove(struct i2c_client *client) return 0; } +static void i2c_hid_shutdown(struct i2c_client *client) +{ + struct i2c_hid *ihid = i2c_get_clientdata(client); + + i2c_hid_set_power(client, I2C_HID_PWR_SLEEP); + free_irq(client->irq, ihid); +} + #ifdef CONFIG_PM_SLEEP static int i2c_hid_suspend(struct device *dev) { @@ -1231,7 +1239,7 @@ static struct i2c_driver i2c_hid_driver = { .probe = i2c_hid_probe, .remove = i2c_hid_remove, - + .shutdown = i2c_hid_shutdown, .id_table = i2c_hid_id_table, }; |