diff options
| author | Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2012-11-14 16:59:13 +0100 |
|---|---|---|
| committer | Mandar Padmawar <mpadmawar@nvidia.com> | 2014-06-25 00:49:26 -0700 |
| commit | e394d7c715114de81e12c94f2cf92ce671d77c96 (patch) | |
| tree | 4d08304c27192136f1aab9bcf8eae2ba04dfeb02 | |
| parent | f0061e4e1298cc1d6ba1f28dae7b068bd2905d96 (diff) | |
HID: export hidinput_calc_abs_res
Exporting the function allows us to calculate the resolution in third
party drivers like hid-multitouch.
This patch also complete the function with additional valid axes.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
(cherry picked from commit 37cf6e6fc34e2fca4e7c565697e7cd5c317bc316)
Change-Id: I526e9fad8ee4369b4a52f6325234a6ef22fb2bb7
Reviewed-on: http://git-master/r/427996
Reviewed-by: Jean Huang <jeanh@nvidia.com>
Tested-by: Jean Huang <jeanh@nvidia.com>
GVS: Gerrit_Virtual_Submit
| -rw-r--r-- | drivers/hid/hid-input.c | 9 | ||||
| -rw-r--r-- | drivers/hid/hid-multitouch.c | 1 | ||||
| -rw-r--r-- | include/linux/hid.h | 1 |
3 files changed, 10 insertions, 1 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index f5ff26fd1e31..5edd4e979a25 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -208,7 +208,7 @@ static int hidinput_setkeycode(struct input_dev *dev, * Only exponent 1 length units are processed. Centimeters and inches are * converted to millimeters. Degrees are converted to radians. */ -static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) +__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) { __s32 unit_exponent = field->unit_exponent; __s32 logical_extents = field->logical_maximum - @@ -229,6 +229,12 @@ static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) case ABS_X: case ABS_Y: case ABS_Z: + case ABS_MT_POSITION_X: + case ABS_MT_POSITION_Y: + case ABS_MT_TOOL_X: + case ABS_MT_TOOL_Y: + case ABS_MT_TOUCH_MAJOR: + case ABS_MT_TOUCH_MINOR: if (field->unit == 0x11) { /* If centimeters */ /* Convert to millimeters */ unit_exponent += 1; @@ -283,6 +289,7 @@ static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) /* Calculate resolution */ return logical_extents / physical_extents; } +EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); #ifdef CONFIG_HID_BATTERY_STRENGTH static enum power_supply_property hidinput_battery_props[] = { diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 7a180b998962..d324c62ed19e 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -280,6 +280,7 @@ static void set_abs(struct input_dev *input, unsigned int code, int fmax = field->logical_maximum; int fuzz = snratio ? (fmax - fmin) / snratio : 0; input_set_abs_params(input, code, fmin, fmax, fuzz, 0); + input_abs_set_res(input, code, hidinput_calc_abs_res(field, code)); } static void mt_store_field(struct hid_usage *usage, struct mt_device *td, diff --git a/include/linux/hid.h b/include/linux/hid.h index 45c97479a317..00e502953589 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -745,6 +745,7 @@ int hid_input_report(struct hid_device *, int type, u8 *, int, int); int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field); struct hid_field *hidinput_get_led_field(struct hid_device *hid); unsigned int hidinput_count_leds(struct hid_device *hid); +__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code); void hid_output_report(struct hid_report *report, __u8 *data); struct hid_device *hid_allocate_device(void); struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id); |