Input: pixcir_i2c_ts - remove platform data

Previous change moved platform data definition into the driver, making it
unusable for users. Given that we want to move away from custom platform
data structures, and always use device properties (DT, ACPI or static) to
configure devices, let's complete the removal.

Tested-by: Fabio Estevam <[e-mail]>
Tested-by: Michal Vokáč <[e-mail]>
Reviewed-by: Roger Quadros <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/pixcir_i2c_ts.c

···
 #define PIXCIR_INT_POL_HIGH	(1UL << 2)
 
 /**
- * struct pixcir_irc_chip_data - chip related data
+ * struct pixcir_i2c_chip_data - chip related data
  * @max_fingers:	Max number of fingers reported simultaneously by h/w
  * @has_hw_ids:		Hardware supports finger tracking IDs
  *
···
 struct pixcir_i2c_chip_data {
 	u8 max_fingers;
 	bool has_hw_ids;
-};
-
-struct pixcir_ts_platform_data {
-	int x_max;
-	int y_max;
-	struct pixcir_i2c_chip_data chip;
 };
 
 struct pixcir_i2c_ts_data {
···
 	struct gpio_desc *gpio_wake;
 	const struct pixcir_i2c_chip_data *chip;
 	struct touchscreen_properties prop;
-	int max_fingers;	/* Max fingers supported in this instance */
 	bool running;
 };
 
···
 	memset(report, 0, sizeof(struct pixcir_report_data));
 
 	i = chip->has_hw_ids ? 1 : 0;
-	readsize = 2 + tsdata->max_fingers * (4 + i);
+	readsize = 2 + tsdata->chip->max_fingers * (4 + i);
 	if (readsize > sizeof(rdbuf))
 		readsize = sizeof(rdbuf);
 
···
 	}
 
 	touch = rdbuf[0] & 0x7;
-	if (touch > tsdata->max_fingers)
-		touch = tsdata->max_fingers;
+	if (touch > tsdata->chip->max_fingers)
+		touch = tsdata->chip->max_fingers;
 
 	report->num_touches = touch;
 	bufptr = &rdbuf[2];
···
 static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
 			 pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
 
-#ifdef CONFIG_OF
-static const struct of_device_id pixcir_of_match[];
-
-static int pixcir_parse_dt(struct device *dev,
-			   struct pixcir_i2c_ts_data *tsdata)
-{
-	tsdata->chip = of_device_get_match_data(dev);
-	if (!tsdata->chip)
-		return -EINVAL;
-
-	return 0;
-}
-#else
-static int pixcir_parse_dt(struct device *dev,
-			   struct pixcir_i2c_ts_data *tsdata)
-{
-	return -EINVAL;
-}
-#endif
-
 static int pixcir_i2c_ts_probe(struct i2c_client *client,
 			       const struct i2c_device_id *id)
 {
-	const struct pixcir_ts_platform_data *pdata =
-			dev_get_platdata(&client->dev);
 	struct device *dev = &client->dev;
 	struct pixcir_i2c_ts_data *tsdata;
 	struct input_dev *input;
···
 	if (!tsdata)
 		return -ENOMEM;
 
-	if (pdata) {
-		tsdata->chip = &pdata->chip;
-	} else if (dev->of_node) {
-		error = pixcir_parse_dt(dev, tsdata);
-		if (error)
-			return error;
-	} else {
-		dev_err(dev, "platform data not defined\n");
-		return -EINVAL;
-	}
-
-	if (!tsdata->chip->max_fingers) {
-		dev_err(dev, "Invalid max_fingers in chip data\n");
+	tsdata->chip = device_get_match_data(dev);
+	if (!tsdata->chip && id)
+		tsdata->chip = (const void *)id->driver_data;
+	if (!tsdata->chip) {
+		dev_err(dev, "can't locate chip data\n");
 		return -EINVAL;
 	}
 
···
 	input->id.bustype = BUS_I2C;
 	input->open = pixcir_input_open;
 	input->close = pixcir_input_close;
-	input->dev.parent = dev;
 
-	if (pdata) {
-		input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
-		input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);
-	} else {
-		input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
-		input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
-		touchscreen_parse_properties(input, true, &tsdata->prop);
-		if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
-		    !input_abs_get_max(input, ABS_MT_POSITION_Y)) {
-			dev_err(dev, "Touchscreen size is not specified\n");
-			return -EINVAL;
-		}
+	input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
+	touchscreen_parse_properties(input, true, &tsdata->prop);
+	if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
+	    !input_abs_get_max(input, ABS_MT_POSITION_Y)) {
+		dev_err(dev, "Touchscreen size is not specified\n");
+		return -EINVAL;
 	}
 
-	tsdata->max_fingers = tsdata->chip->max_fingers;
-	if (tsdata->max_fingers > PIXCIR_MAX_SLOTS) {
-		tsdata->max_fingers = PIXCIR_MAX_SLOTS;
-		dev_info(dev, "Limiting maximum fingers to %d\n",
-			 tsdata->max_fingers);
-	}
-
-	error = input_mt_init_slots(input, tsdata->max_fingers,
+	error = input_mt_init_slots(input, tsdata->chip->max_fingers,
 				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
 	if (error) {
 		dev_err(dev, "Error initializing Multi-Touch slots\n");
···
 	return 0;
 }
 
-static const struct i2c_device_id pixcir_i2c_ts_id[] = {
-	{ "pixcir_ts", 0 },
-	{ "pixcir_tangoc", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
-
-#ifdef CONFIG_OF
 static const struct pixcir_i2c_chip_data pixcir_ts_data = {
 	.max_fingers = 2,
 	/* no hw id support */
···
 	.has_hw_ids = true,
 };
 
+static const struct i2c_device_id pixcir_i2c_ts_id[] = {
+	{ "pixcir_ts", (unsigned long) &pixcir_ts_data },
+	{ "pixcir_tangoc", (unsigned long) &pixcir_tangoc_data },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
+
+#ifdef CONFIG_OF
 static const struct of_device_id pixcir_of_match[] = {
 	{ .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data },
 	{ .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data },