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HID: Add an input configured notification callback

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A hid device may create several input devices, and a driver may need
to prepare or finalize the configuration per input device. Currently,
there is no sane way for a driver to know when a device has been
configured. This patch adds a callback providing that information.

Reviewed-and-tested-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: Ping Cheng <pingc@wacom.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
This commit is contained in:
Henrik Rydberg 2012-07-30 13:28:18 +02:00
parent 2273929340
commit 9ebf3d7687
2 changed files with 12 additions and 2 deletions
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11
drivers/hid/hid-input.c
View File

@ -1154,6 +1154,7 @@ static void report_features(struct hid_device *hid)
int hidinput_connect(struct hid_device *hid, unsigned int force)
{
struct hid_driver *drv = hid->driver;
struct hid_report *report;
struct hid_input *hidinput = NULL;
struct input_dev *input_dev;
@ -1228,6 +1229,8 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
* UGCI) cram a lot of unrelated inputs into the
* same interface. */
hidinput->report = report;
if (drv->input_configured)
drv->input_configured(hid, hidinput);
if (input_register_device(hidinput->input))
goto out_cleanup;
hidinput = NULL;
@ -1235,8 +1238,12 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
}
}
if (hidinput && input_register_device(hidinput->input))
goto out_cleanup;
if (hidinput) {
if (drv->input_configured)
drv->input_configured(hid, hidinput);
if (input_register_device(hidinput->input))
goto out_cleanup;
}
return 0;

3
include/linux/hid.h
View File

@ -626,6 +626,7 @@ struct hid_usage_id {
* @report_fixup: called before report descriptor parsing (NULL means nop)
* @input_mapping: invoked on input registering before mapping an usage
* @input_mapped: invoked on input registering after mapping an usage
* @input_configured: invoked just before the device is registered
* @feature_mapping: invoked on feature registering
* @suspend: invoked on suspend (NULL means nop)
* @resume: invoked on resume if device was not reset (NULL means nop)
@ -670,6 +671,8 @@ struct hid_driver {
int (*input_mapped)(struct hid_device *hdev,
struct hid_input *hidinput, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max);
void (*input_configured)(struct hid_device *hdev,
struct hid_input *hidinput);
void (*feature_mapping)(struct hid_device *hdev,
struct hid_field *field,
struct hid_usage *usage);