diff mbox series

[v2,2/9] Input: iqs5xx - optimize axis definition and validation

Message ID 20210313191236.4366-3-jeff@labundy.com (mailing list archive)
State Accepted
Commit c8af9f8d8d6c8efa2c3952dd6d48dd36f9e4033a
Headers show
Series Input: iqs5xx - more enhancements and optimizations | expand

Commit Message

Jeff LaBundy March 13, 2021, 7:12 p.m. UTC 
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 <jeff@labundy.com>
---
Changes in v2:
 - None

 drivers/input/touchscreen/iqs5xx.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

--
2.17.1

Comments

Dmitry Torokhov March 22, 2021, 4:02 a.m. UTC | #1 
On Sat, Mar 13, 2021 at 01:12:29PM -0600, Jeff LaBundy wrote:
> 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 <jeff@labundy.com>

Applied, thank you.
diff mbox series

Patch

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;