Input: tsc2007 - make use of device properties

Device property API allows to gather device resources from different sources,
such as ACPI. Convert the drivers to unleash the power of device property API.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210314210951.645783-2-andy.shevchenko@gmail.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/tsc2007_core.c

@@ -23,7 +23,8 @@
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
 #include <linux/platform_data/tsc2007.h>
 #include "tsc2007.h"
 
@@ -220,7 +221,6 @@ static void tsc2007_close(struct input_dev *input_dev)
 	tsc2007_stop(ts);
 }
 
-#ifdef CONFIG_OF
 static int tsc2007_get_pendown_state_gpio(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -229,63 +229,50 @@ static int tsc2007_get_pendown_state_gpio(struct device *dev)
 	return gpiod_get_value(ts->gpiod);
 }
 
-static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
+static int tsc2007_probe_properties(struct device *dev, struct tsc2007 *ts)
 {
-	struct device_node *np = client->dev.of_node;
 	u32 val32;
 	u64 val64;
 
-	if (!np) {
-		dev_err(&client->dev, "missing device tree data\n");
-		return -EINVAL;
-	}
-
-	if (!of_property_read_u32(np, "ti,max-rt", &val32))
+	if (!device_property_read_u32(dev, "ti,max-rt", &val32))
 		ts->max_rt = val32;
 	else
 		ts->max_rt = MAX_12BIT;
 
-	if (!of_property_read_u32(np, "ti,fuzzx", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzx", &val32))
 		ts->fuzzx = val32;
 
-	if (!of_property_read_u32(np, "ti,fuzzy", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzy", &val32))
 		ts->fuzzy = val32;
 
-	if (!of_property_read_u32(np, "ti,fuzzz", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzz", &val32))
 		ts->fuzzz = val32;
 
-	if (!of_property_read_u64(np, "ti,poll-period", &val64))
+	if (!device_property_read_u64(dev, "ti,poll-period", &val64))
 		ts->poll_period = msecs_to_jiffies(val64);
 	else
 		ts->poll_period = msecs_to_jiffies(1);
 
-	if (!of_property_read_u32(np, "ti,x-plate-ohms", &val32)) {
+	if (!device_property_read_u32(dev, "ti,x-plate-ohms", &val32)) {
 		ts->x_plate_ohms = val32;
 	} else {
-		dev_err(&client->dev, "missing ti,x-plate-ohms devicetree property.");
+		dev_err(dev, "Missing ti,x-plate-ohms device property\n");
 		return -EINVAL;
 	}
 
-	ts->gpiod = devm_gpiod_get_optional(&client->dev, NULL, GPIOD_IN);
+	ts->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN);
 	if (IS_ERR(ts->gpiod))
 		return PTR_ERR(ts->gpiod);
 
 	if (ts->gpiod)
 		ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
 	else
-		dev_warn(&client->dev, "Pen down GPIO not specified in DT\n");
+		dev_warn(dev, "Pen down GPIO is not specified in properties\n");
 
 	return 0;
 }
-#else
-static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
-{
-	dev_err(&client->dev, "platform data is required!\n");
-	return -EINVAL;
-}
-#endif
 
-static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts,
+static int tsc2007_probe_pdev(struct device *dev, struct tsc2007 *ts,
 			      const struct tsc2007_platform_data *pdata,
 			      const struct i2c_device_id *id)
 {
@@ -300,7 +287,7 @@ static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts,
 	ts->fuzzz             = pdata->fuzzz;
 
 	if (pdata->x_plate_ohms == 0) {
-		dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
+		dev_err(dev, "x_plate_ohms is not set up in platform data\n");
 		return -EINVAL;
 	}
 
@@ -333,9 +320,9 @@ static int tsc2007_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	if (pdata)
-		err = tsc2007_probe_pdev(client, ts, pdata, id);
+		err = tsc2007_probe_pdev(&client->dev, ts, pdata, id);
 	else
-		err = tsc2007_probe_dt(client, ts);
+		err = tsc2007_probe_properties(&client->dev, ts);
 	if (err)
 		return err;
 
@@ -432,18 +419,16 @@ static const struct i2c_device_id tsc2007_idtable[] = {
 
 MODULE_DEVICE_TABLE(i2c, tsc2007_idtable);
 
-#ifdef CONFIG_OF
 static const struct of_device_id tsc2007_of_match[] = {
 	{ .compatible = "ti,tsc2007" },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, tsc2007_of_match);
-#endif
 
 static struct i2c_driver tsc2007_driver = {
 	.driver = {
 		.name	= "tsc2007",
-		.of_match_table = of_match_ptr(tsc2007_of_match),
+		.of_match_table = tsc2007_of_match,
 	},
 	.id_table	= tsc2007_idtable,
 	.probe		= tsc2007_probe,