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platform_kernel-5.15
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HID: alps: fix stick device not working after resume 

The stick device does not work after resume, add U1_SP_ABS_MODE flag can
make the device work after resume.

This has been discovered by pure guesswork, based on how the existing code uses
U1_TP_ABS_MODE flag on both initialization and resume.

I also tested the the patch on an ALPS touchpad without stick device, did not
notice any side effect on suspend/resume, so I made the U1_SP_ABS_MODE flag
mandatory.

[jkosina@suse.cz: made changelog more verbose]
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Kai-Heng Feng 2016-09-19 15:41:39 +08:00 committed by Jiri Kosina
parent 7ee2eaa364
commit 04fd4cb0b0
1 changed files with 2 additions and 2 deletions
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4
drivers/hid/hid-alps.c
View File

@ -245,13 +245,13 @@ static int alps_raw_event(struct hid_device *hdev,
static int alps_post_reset(struct hid_device *hdev)
{
return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, U1_TP_ABS_MODE, false);
NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
}
static int alps_post_resume(struct hid_device *hdev)
{
return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, U1_TP_ABS_MODE, false);
NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
}
#endif /* CONFIG_PM */