Input: ili210x - use one common reset implementation

Rename ili251x_hardware_reset() to ili210x_hardware_reset(), change its
parameter from struct device * to struct gpio_desc *, and use it as one
single consistent reset implementation all over the driver. Also increase
the minimum reset duration to 12ms, to make sure the reset is really
within the spec.

Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20220518210423.106555-1-marex@denx.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: Marek Vasut

drivers/input/touchscreen/ili210x.c

@@ -756,15 +756,12 @@ static int ili251x_firmware_reset(struct i2c_client *client)
 	return ili251x_firmware_busy(client);
 }
 
-static void ili251x_hardware_reset(struct device *dev)
+static void ili210x_hardware_reset(struct gpio_desc *reset_gpio)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct ili210x *priv = i2c_get_clientdata(client);
-
 	/* Reset the controller */
-	gpiod_set_value_cansleep(priv->reset_gpio, 1);
-	usleep_range(10000, 15000);
-	gpiod_set_value_cansleep(priv->reset_gpio, 0);
+	gpiod_set_value_cansleep(reset_gpio, 1);
+	usleep_range(12000, 15000);
+	gpiod_set_value_cansleep(reset_gpio, 0);
 	msleep(300);
 }
 
@@ -773,6 +770,7 @@ static ssize_t ili210x_firmware_update_store(struct device *dev,
 					     const char *buf, size_t count)
 {
 	struct i2c_client *client = to_i2c_client(dev);
+	struct ili210x *priv = i2c_get_clientdata(client);
 	const char *fwname = ILI251X_FW_FILENAME;
 	const struct firmware *fw;
 	u16 ac_end, df_end;
@@ -803,7 +801,7 @@ static ssize_t ili210x_firmware_update_store(struct device *dev,
 
 	dev_dbg(dev, "Firmware update started, firmware=%s\n", fwname);
 
-	ili251x_hardware_reset(dev);
+	ili210x_hardware_reset(priv->reset_gpio);
 
 	error = ili251x_firmware_reset(client);
 	if (error)
@@ -858,7 +856,7 @@ static ssize_t ili210x_firmware_update_store(struct device *dev,
 	error = count;
 
 exit:
-	ili251x_hardware_reset(dev);
+	ili210x_hardware_reset(priv->reset_gpio);
 	dev_dbg(dev, "Firmware update ended, error=%i\n", error);
 	enable_irq(client->irq);
 	kfree(fwbuf);
@@ -951,9 +949,7 @@ static int ili210x_i2c_probe(struct i2c_client *client,
 		if (error)
 			return error;
 
-		usleep_range(12000, 15000);
-		gpiod_set_value_cansleep(reset_gpio, 0);
-		msleep(160);
+		ili210x_hardware_reset(reset_gpio);
 	}
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);