[PATCH v3 7/8] Input: elan_i2c - handle physical middle button

Benjamin Tissoires
2019-05-24T13:50:45Z

Some models have a middle button, we should export it as well.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

--

no changes in v3

new in v2

Is it really worth having a separate property, or should we just expose a
middle button whatsoever?
---
drivers/input/mouse/elan_i2c_core.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 53cac610ba33..7ff044c6cd11 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -99,6 +99,7 @@ struct elan_tp_data {
u8 max_baseline;
bool baseline_ready;
u8 clickpad;
+ bool middle_button;
};

static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count,
@@ -420,6 +421,9 @@ static int elan_query_device_parameters(struct elan_tp_data *data)
if (device_property_read_bool(&client->dev, "elan,clickpad"))
data->clickpad = 1;

+ if (device_property_read_bool(&client->dev, "elan,middle-button"))
+ data->middle_button = true;
+
return 0;
}

@@ -958,8 +962,9 @@ static void elan_report_absolute(struct elan_tp_data *data, u8 *packet)
finger_data += ETP_FINGER_DATA_LEN;
}

- input_report_key(input, BTN_LEFT, tp_info & 0x01);
- input_report_key(input, BTN_RIGHT, tp_info & 0x02);
+ input_report_key(input, BTN_LEFT, tp_info & BIT(0));
+ input_report_key(input, BTN_MIDDLE, tp_info & BIT(2));
+ input_report_key(input, BTN_RIGHT, tp_info & BIT(1));
input_report_abs(input, ABS_DISTANCE, hover_event != 0);
input_mt_report_pointer_emulation(input, true);
input_sync(input);
@@ -1091,10 +1096,13 @@ static int elan_setup_input_device(struct elan_tp_data *data)

__set_bit(EV_ABS, input->evbit);
__set_bit(INPUT_PROP_POINTER, input->propbit);
- if (data->clickpad)
+ if (data->clickpad) {
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
- else
+ } else {
__set_bit(BTN_RIGHT, input->keybit);
+ if (data->middle_button)
+ __set_bit(BTN_MIDDLE, input->keybit);
+ }
__set_bit(BTN_LEFT, input->keybit);

/* Set up ST parameters */
--
2.21.0