See the previous patch for a long explanation. TL;DR: the P52 and the t480s from Lenovo can't rely on I2C to fetch the information, so we need it from PS/2.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1628715 Signed-off-by: Benjamin Tissoires <[email protected]> --- drivers/input/mouse/elan_i2c_core.c | 49 +++++++++++++++++++++++++++---------- 1 file changed, 36 insertions(+), 13 deletions(-) diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c index f5ae24865355..5e7ba383f95c 100644 --- a/drivers/input/mouse/elan_i2c_core.c +++ b/drivers/input/mouse/elan_i2c_core.c @@ -366,27 +366,50 @@ static unsigned int elan_convert_resolution(u8 val) static int elan_query_device_parameters(struct elan_tp_data *data) { + struct i2c_client *client = data->client; unsigned int x_traces, y_traces; u8 hw_x_res, hw_y_res; int error; - error = data->ops->get_max(data->client, &data->max_x, &data->max_y); - if (error) - return error; + if (device_property_read_u32(&client->dev, + "elan,max_x", &data->max_x) || + device_property_read_u32(&client->dev, + "elan,max_y", &data->max_y)) { + error = data->ops->get_max(data->client, + &data->max_x, + &data->max_y); + if (error) + return error; + } - error = data->ops->get_num_traces(data->client, &x_traces, &y_traces); - if (error) - return error; + if (device_property_read_u32(&client->dev, + "elan,width", &data->width_x)) { + error = data->ops->get_num_traces(data->client, + &x_traces, &y_traces); + if (error) + return error; - data->width_x = data->max_x / x_traces; - data->width_y = data->max_y / y_traces; + data->width_x = data->max_x / x_traces; + data->width_y = data->max_y / y_traces; + } else { + data->width_y = data->width_x; + } - error = data->ops->get_resolution(data->client, &hw_x_res, &hw_y_res); - if (error) - return error; + if (device_property_read_u32(&client->dev, + "elan,x_res", &data->x_res) || + device_property_read_u32(&client->dev, + "elan,y_res", &data->y_res)) { + error = data->ops->get_resolution(data->client, + &hw_x_res, &hw_y_res); + if (error) + return error; + + data->x_res = elan_convert_resolution(hw_x_res); + data->y_res = elan_convert_resolution(hw_y_res); + } - data->x_res = elan_convert_resolution(hw_x_res); - data->y_res = elan_convert_resolution(hw_y_res); + if (device_property_read_bool(&client->dev, "elan,clickpad")) + data->clickpad = 1; return 0; } -- 2.14.3
