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| author | Jason Gerecke <killertofu@gmail.com> | 2015-03-06 11:47:40 -0800 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-03-11 11:46:12 -0400 |
| commit | fce9957d8f618346b76c63066e146fc76ed975ce (patch) | |
| tree | 95dfe85fa6a0ab13fef04a01c4b020f6d000cf23 /drivers/hid | |
| parent | 953f2c5f716305a5c2ebea935f410ee7aa439159 (diff) | |
| download | op-kernel-dev-fce9957d8f618346b76c63066e146fc76ed975ce.zip op-kernel-dev-fce9957d8f618346b76c63066e146fc76ed975ce.tar.gz | |
HID: wacom: Allow dynamic battery creation/destruction
Tablets like the Intuos, Intuos Pro, and Bamboo have a connector for an
optional wireless module that can be connected on the fly. The presence
(or absence) of this module is indicated in a status report recieved
from the tablet. This patch adds a workqueue function that will create
or destroy a power_supply object at runtime to match the current state
of the WACOM_QUIRK_BATTERY flag.
Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/wacom.h | 1 | ||||
| -rw-r--r-- | drivers/hid/wacom_sys.c | 17 |
2 files changed, 16 insertions, 2 deletions
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h index b8344b1..ad7318d 100644 --- a/drivers/hid/wacom.h +++ b/drivers/hid/wacom.h @@ -142,4 +142,5 @@ void wacom_wac_usage_mapping(struct hid_device *hdev, int wacom_wac_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value); void wacom_wac_report(struct hid_device *hdev, struct hid_report *report); +void wacom_battery_work(struct work_struct *work); #endif diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 957699f..dfa4be7 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -1057,8 +1057,7 @@ static int wacom_initialize_battery(struct wacom *wacom) static void wacom_destroy_battery(struct wacom *wacom) { - if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && - wacom->battery.dev) { + if (wacom->battery.dev) { power_supply_unregister(&wacom->battery); wacom->battery.dev = NULL; power_supply_unregister(&wacom->ac); @@ -1329,6 +1328,20 @@ fail: return; } +void wacom_battery_work(struct work_struct *work) +{ + struct wacom *wacom = container_of(work, struct wacom, work); + + if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && + !wacom->battery.dev) { + wacom_initialize_battery(wacom); + } + else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && + wacom->battery.dev) { + wacom_destroy_battery(wacom); + } +} + /* * Not all devices report physical dimensions from HID. * Compute the default from hardcoded logical dimension |
