Commit ad5396ee authored by Tomasz Figa's avatar Tomasz Figa Committed by Dmitry Torokhov
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Input: mms114 - add device tree bindings 



Add device tree bindings for mms114 touchscreen.

[Dmitry Torokhov: added #ifdef CONFIG_OF guards]

Signed-off-by: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent dae6ba4a

Documentation/devicetree/bindings/input/touchscreen/mms114.txt

0 → 100644
+34 −0
Original line number Diff line number Diff line 
* MELFAS MMS114 touchscreen controller



Required properties:

- compatible: must be "melfas,mms114"

- reg: I2C address of the chip

- interrupts: interrupt to which the chip is connected

- x-size: horizontal resolution of touchscreen

- y-size: vertical resolution of touchscreen



Optional properties:

- contact-threshold:

- moving-threshold:

- x-invert: invert X axis

- y-invert: invert Y axis



Example:



	i2c@00000000 {

		/* ... */



		touchscreen@48 {

			compatible = "melfas,mms114";

			reg = <0x48>;

			interrupts = <39 0>;

			x-size = <720>;

			y-size = <1280>;

			contact-threshold = <10>;

			moving-threshold = <10>;

			x-invert;

			y-invert;

		};



		/* ... */

	};

drivers/input/touchscreen/mms114.c

+60 −2
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include <linux/module.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/of.h>

#include <linux/i2c.h>

#include <linux/i2c/mms114.h>

#include <linux/input/mt.h>
@@ -360,14 +361,63 @@ static void mms114_input_close(struct input_dev *dev) 
	mms114_stop(data);

}



#ifdef CONFIG_OF

static struct mms114_platform_data * __devinit mms114_parse_dt(struct device *dev)

{

	struct mms114_platform_data *pdata;

	struct device_node *np = dev->of_node;



	if (!np)

		return NULL;



	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata) {

		dev_err(dev, "failed to allocate platform data\n");

		return NULL;

	}



	if (of_property_read_u32(np, "x-size", &pdata->x_size)) {

		dev_err(dev, "failed to get x-size property\n");

		return NULL;

	};



	if (of_property_read_u32(np, "y-size", &pdata->y_size)) {

		dev_err(dev, "failed to get y-size property\n");

		return NULL;

	};



	of_property_read_u32(np, "contact-threshold",

				&pdata->contact_threshold);

	of_property_read_u32(np, "moving-threshold",

				&pdata->moving_threshold);



	if (of_find_property(np, "x-invert", NULL))

		pdata->x_invert = true;

	if (of_find_property(np, "y-invert", NULL))

		pdata->y_invert = true;



	return pdata;

}

#else

static inline struct mms114_platform_data *mms114_parse_dt(struct device *dev)

{

	return NULL;

}

#endif



static int __devinit mms114_probe(struct i2c_client *client,

				  const struct i2c_device_id *id)

{

	const struct mms114_platform_data *pdata;

	struct mms114_data *data;

	struct input_dev *input_dev;

	int error;



	if (!client->dev.platform_data) {

	pdata = dev_get_platdata(&client->dev);

	if (!pdata)

		pdata = mms114_parse_dt(&client->dev);



	if (!pdata) {

		dev_err(&client->dev, "Need platform data\n");

		return -EINVAL;

	}
@@ -389,7 +439,7 @@ static int __devinit mms114_probe(struct i2c_client *client, 


	data->client = client;

	data->input_dev = input_dev;

	data->pdata = client->dev.platform_data;

	data->pdata = pdata;



	input_dev->name = "MELPAS MMS114 Touchscreen";

	input_dev->id.bustype = BUS_I2C;
@@ -525,11 +575,19 @@ static const struct i2c_device_id mms114_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, mms114_id);



#ifdef CONFIG_OF

static struct of_device_id __devinitdata mms114_dt_match[] = {

	{ .compatible = "melfas,mms114" },

	{ }

};

#endif



static struct i2c_driver mms114_driver = {

	.driver = {

		.name	= "mms114",

		.owner	= THIS_MODULE,

		.pm	= &mms114_pm_ops,

		.of_match_table = of_match_ptr(mms114_dt_match),

	},

	.probe		= mms114_probe,

	.remove		= __devexit_p(mms114_remove),