1 files changed, 37 insertions, 75 deletions

diff --git a/drivers/input/touchscreen/tsc200x-core.c b/drivers/input/touchscreen/tsc200x-core.c
index b7059ed8872e..88ea5e1b72ae 100644
--- a/drivers/input/touchscreen/tsc200x-core.c
+++ b/drivers/input/touchscreen/tsc200x-core.c
@@ -27,7 +27,6 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/of.h>
-#include <linux/spi/tsc2005.h>
 #include <linux/regulator/consumer.h>
 #include <linux/regmap.h>
 #include <linux/gpio/consumer.h>
@@ -114,7 +113,6 @@ struct tsc200x {
 	struct regulator	*vio;
 
 	struct gpio_desc	*reset_gpio;
-	void			(*set_reset)(bool enable);
 	int			(*tsc200x_cmd)(struct device *dev, u8 cmd);
 	int			irq;
 };
@@ -227,12 +225,13 @@ static void tsc200x_stop_scan(struct tsc200x *ts)
 	ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP);
 }
 
-static void tsc200x_set_reset(struct tsc200x *ts, bool enable)
+static void tsc200x_reset(struct tsc200x *ts)
 {
-	if (ts->reset_gpio)
-		gpiod_set_value_cansleep(ts->reset_gpio, enable);
-	else if (ts->set_reset)
-		ts->set_reset(enable);
+	if (ts->reset_gpio) {
+		gpiod_set_value_cansleep(ts->reset_gpio, 1);
+		usleep_range(100, 500); /* only 10us required */
+		gpiod_set_value_cansleep(ts->reset_gpio, 0);
+	}
 }
 
 /* must be called with ts->mutex held */
@@ -253,7 +252,7 @@ static void __tsc200x_enable(struct tsc200x *ts)
 {
 	tsc200x_start_scan(ts);
 
-	if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {
+	if (ts->esd_timeout && ts->reset_gpio) {
 		ts->last_valid_interrupt = jiffies;
 		schedule_delayed_work(&ts->esd_work,
 				round_jiffies_relative(
@@ -310,9 +309,7 @@ static ssize_t tsc200x_selftest_show(struct device *dev,
 	}
 
 	/* hardware reset */
-	tsc200x_set_reset(ts, false);
-	usleep_range(100, 500); /* only 10us required */
-	tsc200x_set_reset(ts, true);
+	tsc200x_reset(ts);
 
 	if (!success)
 		goto out;
@@ -354,7 +351,7 @@ static umode_t tsc200x_attr_is_visible(struct kobject *kobj,
 	umode_t mode = attr->mode;
 
 	if (attr == &dev_attr_selftest.attr) {
-		if (!ts->set_reset && !ts->reset_gpio)
+		if (!ts->reset_gpio)
 			mode = 0;
 	}
 
@@ -404,9 +401,7 @@ static void tsc200x_esd_work(struct work_struct *work)
 
 	tsc200x_update_pen_state(ts, 0, 0, 0);
 
-	tsc200x_set_reset(ts, false);
-	usleep_range(100, 500); /* only 10us required */
-	tsc200x_set_reset(ts, true);
+	tsc200x_reset(ts);
 
 	enable_irq(ts->irq);
 	tsc200x_start_scan(ts);
@@ -454,26 +449,12 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 		  struct regmap *regmap,
 		  int (*tsc200x_cmd)(struct device *dev, u8 cmd))
 {
-	const struct tsc2005_platform_data *pdata = dev_get_platdata(dev);
-	struct device_node *np = dev->of_node;
-
 	struct tsc200x *ts;
 	struct input_dev *input_dev;
-	unsigned int max_x = MAX_12BIT;
-	unsigned int max_y = MAX_12BIT;
-	unsigned int max_p = MAX_12BIT;
-	unsigned int fudge_x = TSC200X_DEF_X_FUZZ;
-	unsigned int fudge_y = TSC200X_DEF_Y_FUZZ;
-	unsigned int fudge_p = TSC200X_DEF_P_FUZZ;
-	unsigned int x_plate_ohm = TSC200X_DEF_RESISTOR;
-	unsigned int esd_timeout;
+	u32 x_plate_ohm;
+	u32 esd_timeout;
 	int error;
 
-	if (!np && !pdata) {
-		dev_err(dev, "no platform data\n");
-		return -ENODEV;
-	}
-
 	if (irq <= 0) {
 		dev_err(dev, "no irq\n");
 		return -ENODEV;
@@ -487,23 +468,6 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 		return -ENODEV;
 	}
 
-	if (pdata) {
-		fudge_x	= pdata->ts_x_fudge;
-		fudge_y	= pdata->ts_y_fudge;
-		fudge_p	= pdata->ts_pressure_fudge;
-		max_x	= pdata->ts_x_max;
-		max_y	= pdata->ts_y_max;
-		max_p	= pdata->ts_pressure_max;
-		x_plate_ohm = pdata->ts_x_plate_ohm;
-		esd_timeout = pdata->esd_timeout_ms;
-	} else {
-		x_plate_ohm = TSC200X_DEF_RESISTOR;
-		of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
-		esd_timeout = 0;
-		of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
-								&esd_timeout);
-	}
-
 	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
 	if (!ts)
 		return -ENOMEM;
@@ -517,8 +481,13 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 	ts->idev = input_dev;
 	ts->regmap = regmap;
 	ts->tsc200x_cmd = tsc200x_cmd;
-	ts->x_plate_ohm = x_plate_ohm;
-	ts->esd_timeout = esd_timeout;
+
+	error = device_property_read_u32(dev, "ti,x-plate-ohms", &x_plate_ohm);
+	ts->x_plate_ohm = error ? TSC200X_DEF_RESISTOR : x_plate_ohm;
+
+	error = device_property_read_u32(dev, "ti,esd-recovery-timeout-ms",
+					 &esd_timeout);
+	ts->esd_timeout = error ? 0 : esd_timeout;
 
 	ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(ts->reset_gpio)) {
@@ -527,16 +496,13 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 		return error;
 	}
 
-	ts->vio = devm_regulator_get_optional(dev, "vio");
+	ts->vio = devm_regulator_get(dev, "vio");
 	if (IS_ERR(ts->vio)) {
 		error = PTR_ERR(ts->vio);
-		dev_err(dev, "vio regulator missing (%d)", error);
+		dev_err(dev, "error acquiring vio regulator: %d", error);
 		return error;
 	}
 
-	if (!ts->reset_gpio && pdata)
-		ts->set_reset = pdata->set_reset;
-
 	mutex_init(&ts->mutex);
 
 	spin_lock_init(&ts->lock);
@@ -559,22 +525,23 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 
 	input_dev->phys = ts->phys;
 	input_dev->id = *tsc_id;
-	input_dev->dev.parent = dev;
-	input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
-	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
-	input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
-	input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
-
-	if (np)
-		touchscreen_parse_properties(input_dev, false, NULL);
 
 	input_dev->open = tsc200x_open;
 	input_dev->close = tsc200x_close;
 
 	input_set_drvdata(input_dev, ts);
 
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
+
+	input_set_abs_params(input_dev, ABS_X,
+			     0, MAX_12BIT, TSC200X_DEF_X_FUZZ, 0);
+	input_set_abs_params(input_dev, ABS_Y,
+			     0, MAX_12BIT, TSC200X_DEF_Y_FUZZ, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE,
+			     0, MAX_12BIT, TSC200X_DEF_P_FUZZ, 0);
+
+	touchscreen_parse_properties(input_dev, false, NULL);
+
 	/* Ensure the touchscreen is off */
 	tsc200x_stop_scan(ts);
 
@@ -587,12 +554,9 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 		return error;
 	}
 
-	/* enable regulator for DT */
-	if (ts->vio) {
-		error = regulator_enable(ts->vio);
-		if (error)
-			return error;
-	}
+	error = regulator_enable(ts->vio);
+	if (error)
+		return error;
 
 	dev_set_drvdata(dev, ts);
 	error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group);
@@ -615,8 +579,7 @@ int tsc200x_probe(struct device *dev, int irq, const struct input_id *tsc_id,
 err_remove_sysfs:
 	sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
 disable_regulator:
-	if (ts->vio)
-		regulator_disable(ts->vio);
+	regulator_disable(ts->vio);
 	return error;
 }
 EXPORT_SYMBOL_GPL(tsc200x_probe);
@@ -627,8 +590,7 @@ int tsc200x_remove(struct device *dev)
 
 	sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
 
-	if (ts->vio)
-		regulator_disable(ts->vio);
+	regulator_disable(ts->vio);
 
 	return 0;
 }