From 40c3efdc0b77d3f5298c9ce4fcb029da30f887e5 Mon Sep 17 00:00:00 2001 From: Jeff LaBundy Date: Sun, 21 Mar 2021 21:01:35 -0700 Subject: Input: iqs5xx - optimize axis definition and validation Set the maximum ABS_MT_PRESSURE value and use the existing U16_MAX definition instead of a magic number to validate ABS_MT_POSITION_X and ABS_MT_POSITION_Y. Also use input_set_abs_params() rather than input_abs_set_max() to avoid having to call input_set_capability() separately. Signed-off-by: Jeff LaBundy Link: https://lore.kernel.org/r/20210313191236.4366-3-jeff@labundy.com Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/iqs5xx.c | 30 ++++++++++++++---------------- 1 file changed, 14 insertions(+), 16 deletions(-) (limited to 'drivers/input') diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c index 403e251a5e7d..2a4e048f1400 100644 --- a/drivers/input/touchscreen/iqs5xx.c +++ b/drivers/input/touchscreen/iqs5xx.c @@ -32,7 +32,6 @@ #define IQS5XX_NUM_RETRIES 10 #define IQS5XX_NUM_CONTACTS 5 #define IQS5XX_WR_BYTES_MAX 2 -#define IQS5XX_XY_RES_MAX 0xFFFE #define IQS5XX_PROD_NUM_IQS550 40 #define IQS5XX_PROD_NUM_IQS572 58 @@ -504,10 +503,6 @@ static int iqs5xx_axis_init(struct i2c_client *client) input->open = iqs5xx_open; input->close = iqs5xx_close; - input_set_capability(input, EV_ABS, ABS_MT_POSITION_X); - input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y); - input_set_capability(input, EV_ABS, ABS_MT_PRESSURE); - input_set_drvdata(input, iqs5xx); iqs5xx->input = input; } @@ -520,26 +515,29 @@ static int iqs5xx_axis_init(struct i2c_client *client) if (error) return error; - input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_X, max_x); - input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_Y, max_y); + input_set_abs_params(iqs5xx->input, ABS_MT_POSITION_X, 0, max_x, 0, 0); + input_set_abs_params(iqs5xx->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0); + input_set_abs_params(iqs5xx->input, ABS_MT_PRESSURE, 0, U16_MAX, 0, 0); touchscreen_parse_properties(iqs5xx->input, true, prop); - if (prop->max_x > IQS5XX_XY_RES_MAX) { - dev_err(&client->dev, "Invalid maximum x-coordinate: %u > %u\n", - prop->max_x, IQS5XX_XY_RES_MAX); + /* + * The device reserves 0xFFFF for coordinates that correspond to slots + * which are not in a state of touch. + */ + if (prop->max_x >= U16_MAX || prop->max_y >= U16_MAX) { + dev_err(&client->dev, "Invalid touchscreen size: %u*%u\n", + prop->max_x, prop->max_y); return -EINVAL; - } else if (prop->max_x != max_x) { + } + + if (prop->max_x != max_x) { error = iqs5xx_write_word(client, IQS5XX_X_RES, prop->max_x); if (error) return error; } - if (prop->max_y > IQS5XX_XY_RES_MAX) { - dev_err(&client->dev, "Invalid maximum y-coordinate: %u > %u\n", - prop->max_y, IQS5XX_XY_RES_MAX); - return -EINVAL; - } else if (prop->max_y != max_y) { + if (prop->max_y != max_y) { error = iqs5xx_write_word(client, IQS5XX_Y_RES, prop->max_y); if (error) return error; -- cgit v1.2.3