[PATCH 1/3] input: touchscreen: of: Use input_set_abs_params

[Maxime Ripard <maxime.ripard@free-electrons.com>]

Drivers are still required to call input_set_abs_params for their axes, as if
they only use the touchscreen_parse_of_params function, the axis bit in absbit
won't be set.

Switch to using input_set_abs_params to fully setup each and every available
axis so that drivers will be able to solely use this function.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 drivers/input/touchscreen/of_touchscreen.c | 33 +++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/input/touchscreen/of_touchscreen.c b/drivers/input/touchscreen/of_touchscreen.c
index f8f9b84230b1..74d6b0eb50ac 100644
--- a/drivers/input/touchscreen/of_touchscreen.c
+++ b/drivers/input/touchscreen/of_touchscreen.c
@@ -13,6 +13,16 @@
 #include <linux/input.h>
 #include <linux/input/touchscreen.h>
 
+static u32 of_get_optional_u32(struct device_node *np,
+			       const char *property)
+{
+	u32 val = 0;
+
+	of_property_read_u32(np, property, &val);
+
+	return val;
+}
+
 /**
  * touchscreen_parse_of_params - parse common touchscreen DT properties
  * @dev: device that should be parsed
@@ -24,22 +34,25 @@
 void touchscreen_parse_of_params(struct input_dev *dev)
 {
 	struct device_node *np = dev->dev.parent->of_node;
-	struct input_absinfo *absinfo;
+	u32 maximum, fuzz;
 
 	input_alloc_absinfo(dev);
 	if (!dev->absinfo)
 		return;
 
-	absinfo = &dev->absinfo[ABS_X];
-	of_property_read_u32(np, "touchscreen-size-x", &absinfo->maximum);
-	of_property_read_u32(np, "touchscreen-fuzz-x", &absinfo->fuzz);
+	maximum = of_get_optional_u32(np, "touchscreen-size-x");
+	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-x");
+	if (maximum || fuzz)
+		input_set_abs_params(dev, ABS_X, 0, maximum, fuzz, 0);
 
-	absinfo = &dev->absinfo[ABS_Y];
-	of_property_read_u32(np, "touchscreen-size-y", &absinfo->maximum);
-	of_property_read_u32(np, "touchscreen-fuzz-y", &absinfo->fuzz);
+	maximum = of_get_optional_u32(np, "touchscreen-size-y");
+	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-y");
+	if (maximum || fuzz)
+		input_set_abs_params(dev, ABS_Y, 0, maximum, fuzz, 0);
 
-	absinfo = &dev->absinfo[ABS_PRESSURE];
-	of_property_read_u32(np, "touchscreen-max-pressure", &absinfo->maximum);
-	of_property_read_u32(np, "touchscreen-fuzz-pressure", &absinfo->fuzz);
+	maximum = of_get_optional_u32(np, "touchscreen-max-pressure");
+	fuzz = of_get_optional_u32(np, "touchscreen-fuzz-pressure");
+	if (maximum || fuzz)
+		input_set_abs_params(dev, ABS_PRESSURE, 0, maximum, fuzz, 0);
 }
 EXPORT_SYMBOL(touchscreen_parse_of_params);
-- 
2.1.1