Input: cy8ctmg110_ts - rely on platform code to supply interrupt

Instead of using platform data to specify GPIO that is used as interrupt
source, rely on the platform and I2C core to set it up properly.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210603043726.3793876-1-dmitry.torokhov@gmail.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/cy8ctmg110_ts.c

@@ -46,7 +46,6 @@ struct cy8ctmg110 {
 	char phys[32];
 	struct i2c_client *client;
 	int reset_pin;
-	int irq_pin;
 };
 
 /*
@@ -191,7 +190,6 @@ static int cy8ctmg110_probe(struct i2c_client *client,
 	ts->client = client;
 	ts->input = input_dev;
 	ts->reset_pin = pdata->reset_pin;
-	ts->irq_pin = pdata->irq_pin;
 
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input0", dev_name(&client->dev));
@@ -222,38 +220,13 @@ static int cy8ctmg110_probe(struct i2c_client *client,
 	cy8ctmg110_power(ts, true);
 	cy8ctmg110_set_sleepmode(ts, false);
 
-	err = gpio_request(ts->irq_pin, "touch_irq_key");
-	if (err < 0) {
-		dev_err(&client->dev,
-			"Failed to request GPIO %d, error %d\n",
-			ts->irq_pin, err);
-		goto err_shutoff_device;
-	}
-
-	err = gpio_direction_input(ts->irq_pin);
-	if (err < 0) {
-		dev_err(&client->dev,
-			"Failed to configure input direction for GPIO %d, error %d\n",
-			ts->irq_pin, err);
-		goto err_free_irq_gpio;
-	}
-
-	client->irq = gpio_to_irq(ts->irq_pin);
-	if (client->irq < 0) {
-		err = client->irq;
-		dev_err(&client->dev,
-			"Unable to get irq number for GPIO %d, error %d\n",
-			ts->irq_pin, err);
-		goto err_free_irq_gpio;
-	}
-
 	err = request_threaded_irq(client->irq, NULL, cy8ctmg110_irq_thread,
 				   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 				   "touch_reset_key", ts);
 	if (err < 0) {
 		dev_err(&client->dev,
 			"irq %d busy? error %d\n", client->irq, err);
-		goto err_free_irq_gpio;
+		goto err_shutoff_device;
 	}
 
 	err = input_register_device(input_dev);
@@ -266,8 +239,6 @@ static int cy8ctmg110_probe(struct i2c_client *client,
 
 err_free_irq:
 	free_irq(client->irq, ts);
-err_free_irq_gpio:
-	gpio_free(ts->irq_pin);
 err_shutoff_device:
 	cy8ctmg110_set_sleepmode(ts, true);
 	cy8ctmg110_power(ts, false);
@@ -318,7 +289,6 @@ static int cy8ctmg110_remove(struct i2c_client *client)
 
 	free_irq(client->irq, ts);
 	input_unregister_device(ts->input);
-	gpio_free(ts->irq_pin);
 	if (ts->reset_pin)
 		gpio_free(ts->reset_pin);
 	kfree(ts);

include/linux/input/cy8ctmg110_pdata.h

@@ -5,7 +5,6 @@
 struct cy8ctmg110_pdata
 {
 	int reset_pin;		/* Reset pin is wired to this GPIO (optional) */
-	int irq_pin;		/* IRQ pin is wired to this GPIO */
 };
 
 #endif