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| author | Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2012-11-14 16:59:13 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-11-15 10:06:28 +0100 |
| commit | 37cf6e6fc34e2fca4e7c565697e7cd5c317bc316 (patch) | |
| tree | 8a33a35b0e8cfbc95ac8e7ea79141ef0c05edc1d /drivers/hid | |
| parent | 976bacef40c66443173283cc02b537e37a62c981 (diff) | |
| download | linux-37cf6e6fc34e2fca4e7c565697e7cd5c317bc316.tar.gz linux-37cf6e6fc34e2fca4e7c565697e7cd5c317bc316.tar.bz2 linux-37cf6e6fc34e2fca4e7c565697e7cd5c317bc316.zip | |
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>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-input.c | 9 | ||||
| -rw-r--r-- | drivers/hid/hid-multitouch.c | 1 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index d917c0d53685..d1ec571bdb3b 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 7867d69f0efe..3687f797b731 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -297,6 +297,7 @@ 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, |