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[PATCH 18/19] HID: Add an input configured notification callback

 

 

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rydberg at euromail

Aug 12, 2012, 2:42 PM

Post #1 of 1 (81 views)
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[PATCH 18/19] HID: Add an input configured notification callback

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.

Signed-off-by: Henrik Rydberg <rydberg [at] euromail>
---
drivers/hid/hid-input.c | 11 +++++++++--
include/linux/hid.h | 3 +++
2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index ad5cbcf..49141db 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1150,6 +1150,7 @@ 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;
@@ -1224,6 +1225,8 @@ 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;
@@ -1231,8 +1234,12 @@ 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;

diff --git a/include/linux/hid.h b/include/linux/hid.h
index 42970de..f37da28 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -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);
--
1.7.11.4

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