[v2] Input: mms114 - drop platform data and use generic APIs

Message ID 20180113020456.12391-1-simon@lineageos.org
State Not Applicable, archived
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  • [v2] Input: mms114 - drop platform data and use generic APIs
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Commit Message

Simon Shields Jan. 13, 2018, 2:04 a.m.
The MMS114 platform data has no in-tree users, so drop it,
and make the driver depend on CONFIG_OF.

Switch to using the standard touchscreen properties via
touchscreen_parse_properties(), and move the old DT parsing code
to use device_property_*() APIs.

Finally, use touchscreen_report_pos to report x/y coordinates
and drop the custom x/y inversion code.

Signed-off-by: Simon Shields <simon@lineageos.org>
---
 .../bindings/input/touchscreen/mms114.txt          |  29 ++--
 drivers/input/touchscreen/Kconfig                  |   1 +
 drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
 include/linux/platform_data/mms114.h               |  24 ----
 4 files changed, 83 insertions(+), 123 deletions(-)
 delete mode 100644 include/linux/platform_data/mms114.h

Comments

Andi Shyti Jan. 16, 2018, 7:56 a.m. | #1
Hi Simon,

On Sat, Jan 13, 2018 at 01:04:56PM +1100, Simon Shields wrote:
> The MMS114 platform data has no in-tree users, so drop it,
> and make the driver depend on CONFIG_OF.
> 
> Switch to using the standard touchscreen properties via
> touchscreen_parse_properties(), and move the old DT parsing code
> to use device_property_*() APIs.
> 
> Finally, use touchscreen_report_pos to report x/y coordinates
> and drop the custom x/y inversion code.
> 
> Signed-off-by: Simon Shields <simon@lineageos.org>
> ---
>  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
>  drivers/input/touchscreen/Kconfig                  |   1 +
>  drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
>  include/linux/platform_data/mms114.h               |  24 ----
>  4 files changed, 83 insertions(+), 123 deletions(-)
>  delete mode 100644 include/linux/platform_data/mms114.h
> 

The patch looks good, but you would also need to update the dtsi
files in this same patch:

./arch/arm/boot/dts/exynos4412-trats2.dts
./arch/arm/boot/dts/exynos4210-trats.dts

and Cc the Samsung-soc mailing list.

For now it's a nack because the touchscreen would not work
anymore with the trats boards.

One more thing, you forgot Rob's ACK.

Andi
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Simon Shields Jan. 16, 2018, 8:52 a.m. | #2
Hi Andi,

Thanks for the review!

On Tue, Jan 16, 2018 at 04:56:11PM +0900, Andi Shyti wrote:
> Hi Simon,
> 
> On Sat, Jan 13, 2018 at 01:04:56PM +1100, Simon Shields wrote:
> > The MMS114 platform data has no in-tree users, so drop it,
> > and make the driver depend on CONFIG_OF.
> > 
> > Switch to using the standard touchscreen properties via
> > touchscreen_parse_properties(), and move the old DT parsing code
> > to use device_property_*() APIs.
> > 
> > Finally, use touchscreen_report_pos to report x/y coordinates
> > and drop the custom x/y inversion code.
> > 
> > Signed-off-by: Simon Shields <simon@lineageos.org>
> > ---
> >  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
> >  drivers/input/touchscreen/Kconfig                  |   1 +
> >  drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
> >  include/linux/platform_data/mms114.h               |  24 ----
> >  4 files changed, 83 insertions(+), 123 deletions(-)
> >  delete mode 100644 include/linux/platform_data/mms114.h
> > 
> 
> The patch looks good, but you would also need to update the dtsi
> files in this same patch:
> 
> ./arch/arm/boot/dts/exynos4412-trats2.dts
> ./arch/arm/boot/dts/exynos4210-trats.dts
> 
> and Cc the Samsung-soc mailing list.
> 
> For now it's a nack because the touchscreen would not work
> anymore with the trats boards.

This patch keeps support for the old bindings. I've verified that both
the old and new bindings work on a GT-I9300 (trats2 with a different
bootloader/partition layout).

> 
> One more thing, you forgot Rob's ACK.

I wasn't sure whether or not to keep the Reviewed-By tag, since
this is a new version of the patch. In the future, I'll keep it.

> 
> Andi

Cheers,
Simon
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Rob Herring Jan. 19, 2018, 6:42 p.m. | #3
On Tue, Jan 16, 2018 at 07:52:06PM +1100, Simon Shields wrote:
> Hi Andi,
> 
> Thanks for the review!
> 
> On Tue, Jan 16, 2018 at 04:56:11PM +0900, Andi Shyti wrote:
> > Hi Simon,
> > 
> > On Sat, Jan 13, 2018 at 01:04:56PM +1100, Simon Shields wrote:
> > > The MMS114 platform data has no in-tree users, so drop it,
> > > and make the driver depend on CONFIG_OF.
> > > 
> > > Switch to using the standard touchscreen properties via
> > > touchscreen_parse_properties(), and move the old DT parsing code
> > > to use device_property_*() APIs.
> > > 
> > > Finally, use touchscreen_report_pos to report x/y coordinates
> > > and drop the custom x/y inversion code.
> > > 
> > > Signed-off-by: Simon Shields <simon@lineageos.org>
> > > ---
> > >  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
> > >  drivers/input/touchscreen/Kconfig                  |   1 +
> > >  drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
> > >  include/linux/platform_data/mms114.h               |  24 ----
> > >  4 files changed, 83 insertions(+), 123 deletions(-)
> > >  delete mode 100644 include/linux/platform_data/mms114.h
> > > 
> > 
> > The patch looks good, but you would also need to update the dtsi
> > files in this same patch:

Yes, but dts updates should be a separate patch. Really, the DT docs are 
supposed to be too, but I let that go if there's no other review 
changes.

> > 
> > ./arch/arm/boot/dts/exynos4412-trats2.dts
> > ./arch/arm/boot/dts/exynos4210-trats.dts
> > 
> > and Cc the Samsung-soc mailing list.
> > 
> > For now it's a nack because the touchscreen would not work
> > anymore with the trats boards.
> 
> This patch keeps support for the old bindings. I've verified that both
> the old and new bindings work on a GT-I9300 (trats2 with a different
> bootloader/partition layout).

The driver needs to support both old and new. The dts files can be 
updated as long as they'd still work the same. Old dtb and new kernel is 
the primary case we care about preserving the ABI.

> 
> > 
> > One more thing, you forgot Rob's ACK.
> 
> I wasn't sure whether or not to keep the Reviewed-By tag, since
> this is a new version of the patch. In the future, I'll keep it.

Yes, you should as long as the binding doesn't change significantly.

Rob
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Andi Shyti Jan. 23, 2018, 11:15 a.m. | #4
Hi Simon,

sorry for the late answer,

On Tue, Jan 16, 2018 at 07:52:06PM +1100, Simon Shields wrote:
> Hi Andi,
> 
> Thanks for the review!
> 
> On Tue, Jan 16, 2018 at 04:56:11PM +0900, Andi Shyti wrote:
> > Hi Simon,
> > 
> > On Sat, Jan 13, 2018 at 01:04:56PM +1100, Simon Shields wrote:
> > > The MMS114 platform data has no in-tree users, so drop it,
> > > and make the driver depend on CONFIG_OF.
> > > 
> > > Switch to using the standard touchscreen properties via
> > > touchscreen_parse_properties(), and move the old DT parsing code
> > > to use device_property_*() APIs.
> > > 
> > > Finally, use touchscreen_report_pos to report x/y coordinates
> > > and drop the custom x/y inversion code.
> > > 
> > > Signed-off-by: Simon Shields <simon@lineageos.org>
> > > ---
> > >  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
> > >  drivers/input/touchscreen/Kconfig                  |   1 +
> > >  drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
> > >  include/linux/platform_data/mms114.h               |  24 ----
> > >  4 files changed, 83 insertions(+), 123 deletions(-)
> > >  delete mode 100644 include/linux/platform_data/mms114.h
> > > 
> > 
> > The patch looks good, but you would also need to update the dtsi
> > files in this same patch:
> > 
> > ./arch/arm/boot/dts/exynos4412-trats2.dts
> > ./arch/arm/boot/dts/exynos4210-trats.dts
> > 
> > and Cc the Samsung-soc mailing list.
> > 
> > For now it's a nack because the touchscreen would not work
> > anymore with the trats boards.
> 
> This patch keeps support for the old bindings. I've verified that both
> the old and new bindings work on a GT-I9300 (trats2 with a different
> bootloader/partition layout).

Oh, yes, I read the patch partially, I didn't see that you
actually kept the back compatibility by doing this:

> +     if (mms114_parse_dt(data) < 0) {
> +             /* No valid legacy binding found, try the common one */
> +             touchscreen_parse_properties(input_dev, true, &data->props);

[...]

Sorry for the confusion, please add:

Reviewed-by: Andi Shyti <andi.shyti@samsung.com>
Tested-by: Andi Shyti <andi.shyti@samsung.com>

And for reference to Dmitry, there is also Rob's ack.

Andi
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Dmitry Torokhov Jan. 24, 2018, 7:37 p.m. | #5
On Sat, Jan 13, 2018 at 01:04:56PM +1100, Simon Shields wrote:
> The MMS114 platform data has no in-tree users, so drop it,
> and make the driver depend on CONFIG_OF.
> 
> Switch to using the standard touchscreen properties via
> touchscreen_parse_properties(), and move the old DT parsing code
> to use device_property_*() APIs.
> 
> Finally, use touchscreen_report_pos to report x/y coordinates
> and drop the custom x/y inversion code.
> 
> Signed-off-by: Simon Shields <simon@lineageos.org>
> ---
>  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
>  drivers/input/touchscreen/Kconfig                  |   1 +
>  drivers/input/touchscreen/mms114.c                 | 152 +++++++++------------
>  include/linux/platform_data/mms114.h               |  24 ----
>  4 files changed, 83 insertions(+), 123 deletions(-)
>  delete mode 100644 include/linux/platform_data/mms114.h
> 
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
> index 89d4c56c5671..8f9f9f38eff4 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
> +++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
> @@ -4,14 +4,18 @@ 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
> +- touchscreen-size-x: See [1]
> +- touchscreen-size-y: See [1]
>  
>  Optional properties:
> -- contact-threshold:
> -- moving-threshold:
> -- x-invert: invert X axis
> -- y-invert: invert Y axis
> +- touchscreen-fuzz-x: See [1]
> +- touchscreen-fuzz-y: See [1]
> +- touchscreen-fuzz-pressure: See [1]
> +- touchscreen-inverted-x: See [1]
> +- touchscreen-inverted-y: See [1]
> +- touchscreen-swapped-x-y: See [1]
> +
> +[1]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
>  
>  Example:
>  
> @@ -22,12 +26,13 @@ Example:
>  			compatible = "melfas,mms114";
>  			reg = <0x48>;
>  			interrupts = <39 0>;
> -			x-size = <720>;
> -			y-size = <1280>;
> -			contact-threshold = <10>;
> -			moving-threshold = <10>;
> -			x-invert;
> -			y-invert;
> +			touchscreen-size-x = <720>;
> +			touchscreen-size-y = <1280>;
> +			touchscreen-fuzz-x = <10>;
> +			touchscreen-fuzz-y = <10>;
> +			touchscreen-fuzz-pressure = <10>;
> +			touchscreen-inverted-x;
> +			touchscreen-inverted-y;
>  		};
>  
>  		/* ... */
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 38a226f9fcbd..f7ea5522ef91 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -524,6 +524,7 @@ config TOUCHSCREEN_MCS5000
>  config TOUCHSCREEN_MMS114
>  	tristate "MELFAS MMS114 touchscreen"
>  	depends on I2C
> +	depends on OF

There is no need for that, with generic device properties we can use it
with ACPI or static board files.

>  	help
>  	  Say Y here if you have the MELFAS MMS114 touchscreen controller
>  	  chip in your system.
> diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
> index e5eeb6311f7d..6276a3387cd4 100644
> --- a/drivers/input/touchscreen/mms114.c
> +++ b/drivers/input/touchscreen/mms114.c
> @@ -12,8 +12,8 @@
>  #include <linux/of.h>
>  #include <linux/i2c.h>
>  #include <linux/input/mt.h>
> +#include <linux/input/touchscreen.h>
>  #include <linux/interrupt.h>
> -#include <linux/platform_data/mms114.h>
>  #include <linux/regulator/consumer.h>
>  #include <linux/slab.h>
>  
> @@ -55,7 +55,9 @@ struct mms114_data {
>  	struct input_dev	*input_dev;
>  	struct regulator	*core_reg;
>  	struct regulator	*io_reg;
> -	const struct mms114_platform_data	*pdata;
> +	struct touchscreen_properties props;
> +	unsigned int contact_threshold;
> +	unsigned int moving_threshold;
>  
>  	/* Use cache data for mode control register(write only) */
>  	u8			cache_mode_control;
> @@ -143,7 +145,6 @@ static int mms114_write_reg(struct mms114_data *data, unsigned int reg,
>  
>  static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch)
>  {
> -	const struct mms114_platform_data *pdata = data->pdata;
>  	struct i2c_client *client = data->client;
>  	struct input_dev *input_dev = data->input_dev;
>  	unsigned int id;
> @@ -163,16 +164,6 @@ static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
>  	id = touch->id - 1;
>  	x = touch->x_lo | touch->x_hi << 8;
>  	y = touch->y_lo | touch->y_hi << 8;
> -	if (x > pdata->x_size || y > pdata->y_size) {
> -		dev_dbg(&client->dev,
> -			"Wrong touch coordinates (%d, %d)\n", x, y);
> -		return;
> -	}
> -
> -	if (pdata->x_invert)
> -		x = pdata->x_size - x;
> -	if (pdata->y_invert)
> -		y = pdata->y_size - y;
>  
>  	dev_dbg(&client->dev,
>  		"id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n",
> @@ -183,9 +174,8 @@ static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
>  	input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed);
>  
>  	if (touch->pressed) {
> +		touchscreen_report_pos(input_dev, &data->props, x, y, true);
>  		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width);
> -		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
> -		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
>  		input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength);
>  	}
>  }
> @@ -263,7 +253,7 @@ static int mms114_get_version(struct mms114_data *data)
>  
>  static int mms114_setup_regs(struct mms114_data *data)
>  {
> -	const struct mms114_platform_data *pdata = data->pdata;
> +	const struct touchscreen_properties *props = &data->props;
>  	int val;
>  	int error;
>  
> @@ -275,32 +265,32 @@ static int mms114_setup_regs(struct mms114_data *data)
>  	if (error < 0)
>  		return error;
>  
> -	val = (pdata->x_size >> 8) & 0xf;
> -	val |= ((pdata->y_size >> 8) & 0xf) << 4;
> +	val = (props->max_x >> 8) & 0xf;
> +	val |= ((props->max_y >> 8) & 0xf) << 4;
>  	error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val);
>  	if (error < 0)
>  		return error;
>  
> -	val = pdata->x_size & 0xff;
> +	val = props->max_x & 0xff;
>  	error = mms114_write_reg(data, MMS114_X_RESOLUTION, val);
>  	if (error < 0)
>  		return error;
>  
> -	val = pdata->y_size & 0xff;
> +	val = props->max_x & 0xff;
>  	error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val);
>  	if (error < 0)
>  		return error;
>  
> -	if (pdata->contact_threshold) {
> +	if (data->contact_threshold) {
>  		error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD,
> -				pdata->contact_threshold);
> +				data->contact_threshold);
>  		if (error < 0)
>  			return error;
>  	}
>  
> -	if (pdata->moving_threshold) {
> +	if (data->moving_threshold) {
>  		error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD,
> -				pdata->moving_threshold);
> +				data->moving_threshold);
>  		if (error < 0)
>  			return error;
>  	}
> @@ -335,9 +325,6 @@ static int mms114_start(struct mms114_data *data)
>  		return error;
>  	}
>  
> -	if (data->pdata->cfg_pin)
> -		data->pdata->cfg_pin(true);
> -
>  	enable_irq(client->irq);
>  
>  	return 0;
> @@ -350,9 +337,6 @@ static void mms114_stop(struct mms114_data *data)
>  
>  	disable_irq(client->irq);
>  
> -	if (data->pdata->cfg_pin)
> -		data->pdata->cfg_pin(false);
> -
>  	error = regulator_disable(data->io_reg);
>  	if (error)
>  		dev_warn(&client->dev, "Failed to disable vdd: %d\n", error);
> @@ -376,67 +360,43 @@ static void mms114_input_close(struct input_dev *dev)
>  	mms114_stop(data);
>  }
>  
> -#ifdef CONFIG_OF
> -static struct mms114_platform_data *mms114_parse_dt(struct device *dev)
> +static int mms114_parse_dt(struct mms114_data *data)
>  {
> -	struct mms114_platform_data *pdata;
> -	struct device_node *np = dev->of_node;
> -
> -	if (!np)
> -		return NULL;
> +	struct device *dev = &data->client->dev;
> +	struct touchscreen_properties *props = &data->props;
>  
> -	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> -	if (!pdata) {
> -		dev_err(dev, "failed to allocate platform data\n");
> -		return NULL;
> +	if (device_property_read_u32(dev, "x-size", &props->max_x)) {
> +		dev_dbg(dev, "failed to get legacy x-size property\n");
> +		return -EINVAL;
>  	}
>  
> -	if (of_property_read_u32(np, "x-size", &pdata->x_size)) {
> -		dev_err(dev, "failed to get x-size property\n");
> -		return NULL;
> +	if (device_property_read_u32(dev, "y-size", &props->max_y)) {
> +		dev_dbg(dev, "failed to get legacy y-size property\n");
> +		return -EINVAL;
>  	}
>  
> -	if (of_property_read_u32(np, "y-size", &pdata->y_size)) {
> -		dev_err(dev, "failed to get y-size property\n");
> -		return NULL;
> -	}
> +	device_property_read_u32(dev, "contact-threshold",
> +				&data->contact_threshold);
> +	device_property_read_u32(dev, "moving-threshold",
> +				&data->moving_threshold);
>  
> -	of_property_read_u32(np, "contact-threshold",
> -				&pdata->contact_threshold);
> -	of_property_read_u32(np, "moving-threshold",
> -				&pdata->moving_threshold);
> +	if (device_property_read_bool(dev, "x-invert"))
> +		props->invert_x = true;
> +	if (device_property_read_bool(dev, "y-invert"))
> +		props->invert_y = true;
>  
> -	if (of_find_property(np, "x-invert", NULL))
> -		pdata->x_invert = true;
> -	if (of_find_property(np, "y-invert", NULL))
> -		pdata->y_invert = true;
> +	props->swap_x_y = false;
>  
> -	return pdata;
> -}
> -#else
> -static inline struct mms114_platform_data *mms114_parse_dt(struct device *dev)
> -{
> -	return NULL;
> +	return 0;
>  }
> -#endif
>  
>  static int 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;
>  
> -	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;
> -	}
> -
>  	if (!i2c_check_functionality(client->adapter,
>  				I2C_FUNC_PROTOCOL_MANGLING)) {
>  		dev_err(&client->dev,
> @@ -453,8 +413,39 @@ static int mms114_probe(struct i2c_client *client,
>  	}
>  
>  	data->client = client;
> +
> +	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_PRESSURE);
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_TOUCH_MAJOR);
> +
> +	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
> +
> +	if (mms114_parse_dt(data) < 0) {
> +		/* No valid legacy binding found, try the common one */
> +		touchscreen_parse_properties(input_dev, true, &data->props);

My preference would be going in the other direction: try the newer
binding first, fall back to legacy.

I have a couple more changes ot the driver, I'll post them and the
updated version of your patch as well.

Thanks.

Patch

diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
index 89d4c56c5671..8f9f9f38eff4 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
@@ -4,14 +4,18 @@  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
+- touchscreen-size-x: See [1]
+- touchscreen-size-y: See [1]
 
 Optional properties:
-- contact-threshold:
-- moving-threshold:
-- x-invert: invert X axis
-- y-invert: invert Y axis
+- touchscreen-fuzz-x: See [1]
+- touchscreen-fuzz-y: See [1]
+- touchscreen-fuzz-pressure: See [1]
+- touchscreen-inverted-x: See [1]
+- touchscreen-inverted-y: See [1]
+- touchscreen-swapped-x-y: See [1]
+
+[1]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
 
 Example:
 
@@ -22,12 +26,13 @@  Example:
 			compatible = "melfas,mms114";
 			reg = <0x48>;
 			interrupts = <39 0>;
-			x-size = <720>;
-			y-size = <1280>;
-			contact-threshold = <10>;
-			moving-threshold = <10>;
-			x-invert;
-			y-invert;
+			touchscreen-size-x = <720>;
+			touchscreen-size-y = <1280>;
+			touchscreen-fuzz-x = <10>;
+			touchscreen-fuzz-y = <10>;
+			touchscreen-fuzz-pressure = <10>;
+			touchscreen-inverted-x;
+			touchscreen-inverted-y;
 		};
 
 		/* ... */
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 38a226f9fcbd..f7ea5522ef91 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -524,6 +524,7 @@  config TOUCHSCREEN_MCS5000
 config TOUCHSCREEN_MMS114
 	tristate "MELFAS MMS114 touchscreen"
 	depends on I2C
+	depends on OF
 	help
 	  Say Y here if you have the MELFAS MMS114 touchscreen controller
 	  chip in your system.
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index e5eeb6311f7d..6276a3387cd4 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -12,8 +12,8 @@ 
 #include <linux/of.h>
 #include <linux/i2c.h>
 #include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
 #include <linux/interrupt.h>
-#include <linux/platform_data/mms114.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 
@@ -55,7 +55,9 @@  struct mms114_data {
 	struct input_dev	*input_dev;
 	struct regulator	*core_reg;
 	struct regulator	*io_reg;
-	const struct mms114_platform_data	*pdata;
+	struct touchscreen_properties props;
+	unsigned int contact_threshold;
+	unsigned int moving_threshold;
 
 	/* Use cache data for mode control register(write only) */
 	u8			cache_mode_control;
@@ -143,7 +145,6 @@  static int mms114_write_reg(struct mms114_data *data, unsigned int reg,
 
 static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch)
 {
-	const struct mms114_platform_data *pdata = data->pdata;
 	struct i2c_client *client = data->client;
 	struct input_dev *input_dev = data->input_dev;
 	unsigned int id;
@@ -163,16 +164,6 @@  static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
 	id = touch->id - 1;
 	x = touch->x_lo | touch->x_hi << 8;
 	y = touch->y_lo | touch->y_hi << 8;
-	if (x > pdata->x_size || y > pdata->y_size) {
-		dev_dbg(&client->dev,
-			"Wrong touch coordinates (%d, %d)\n", x, y);
-		return;
-	}
-
-	if (pdata->x_invert)
-		x = pdata->x_size - x;
-	if (pdata->y_invert)
-		y = pdata->y_size - y;
 
 	dev_dbg(&client->dev,
 		"id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n",
@@ -183,9 +174,8 @@  static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
 	input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed);
 
 	if (touch->pressed) {
+		touchscreen_report_pos(input_dev, &data->props, x, y, true);
 		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width);
-		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
-		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 		input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength);
 	}
 }
@@ -263,7 +253,7 @@  static int mms114_get_version(struct mms114_data *data)
 
 static int mms114_setup_regs(struct mms114_data *data)
 {
-	const struct mms114_platform_data *pdata = data->pdata;
+	const struct touchscreen_properties *props = &data->props;
 	int val;
 	int error;
 
@@ -275,32 +265,32 @@  static int mms114_setup_regs(struct mms114_data *data)
 	if (error < 0)
 		return error;
 
-	val = (pdata->x_size >> 8) & 0xf;
-	val |= ((pdata->y_size >> 8) & 0xf) << 4;
+	val = (props->max_x >> 8) & 0xf;
+	val |= ((props->max_y >> 8) & 0xf) << 4;
 	error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val);
 	if (error < 0)
 		return error;
 
-	val = pdata->x_size & 0xff;
+	val = props->max_x & 0xff;
 	error = mms114_write_reg(data, MMS114_X_RESOLUTION, val);
 	if (error < 0)
 		return error;
 
-	val = pdata->y_size & 0xff;
+	val = props->max_x & 0xff;
 	error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val);
 	if (error < 0)
 		return error;
 
-	if (pdata->contact_threshold) {
+	if (data->contact_threshold) {
 		error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD,
-				pdata->contact_threshold);
+				data->contact_threshold);
 		if (error < 0)
 			return error;
 	}
 
-	if (pdata->moving_threshold) {
+	if (data->moving_threshold) {
 		error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD,
-				pdata->moving_threshold);
+				data->moving_threshold);
 		if (error < 0)
 			return error;
 	}
@@ -335,9 +325,6 @@  static int mms114_start(struct mms114_data *data)
 		return error;
 	}
 
-	if (data->pdata->cfg_pin)
-		data->pdata->cfg_pin(true);
-
 	enable_irq(client->irq);
 
 	return 0;
@@ -350,9 +337,6 @@  static void mms114_stop(struct mms114_data *data)
 
 	disable_irq(client->irq);
 
-	if (data->pdata->cfg_pin)
-		data->pdata->cfg_pin(false);
-
 	error = regulator_disable(data->io_reg);
 	if (error)
 		dev_warn(&client->dev, "Failed to disable vdd: %d\n", error);
@@ -376,67 +360,43 @@  static void mms114_input_close(struct input_dev *dev)
 	mms114_stop(data);
 }
 
-#ifdef CONFIG_OF
-static struct mms114_platform_data *mms114_parse_dt(struct device *dev)
+static int mms114_parse_dt(struct mms114_data *data)
 {
-	struct mms114_platform_data *pdata;
-	struct device_node *np = dev->of_node;
-
-	if (!np)
-		return NULL;
+	struct device *dev = &data->client->dev;
+	struct touchscreen_properties *props = &data->props;
 
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata) {
-		dev_err(dev, "failed to allocate platform data\n");
-		return NULL;
+	if (device_property_read_u32(dev, "x-size", &props->max_x)) {
+		dev_dbg(dev, "failed to get legacy x-size property\n");
+		return -EINVAL;
 	}
 
-	if (of_property_read_u32(np, "x-size", &pdata->x_size)) {
-		dev_err(dev, "failed to get x-size property\n");
-		return NULL;
+	if (device_property_read_u32(dev, "y-size", &props->max_y)) {
+		dev_dbg(dev, "failed to get legacy y-size property\n");
+		return -EINVAL;
 	}
 
-	if (of_property_read_u32(np, "y-size", &pdata->y_size)) {
-		dev_err(dev, "failed to get y-size property\n");
-		return NULL;
-	}
+	device_property_read_u32(dev, "contact-threshold",
+				&data->contact_threshold);
+	device_property_read_u32(dev, "moving-threshold",
+				&data->moving_threshold);
 
-	of_property_read_u32(np, "contact-threshold",
-				&pdata->contact_threshold);
-	of_property_read_u32(np, "moving-threshold",
-				&pdata->moving_threshold);
+	if (device_property_read_bool(dev, "x-invert"))
+		props->invert_x = true;
+	if (device_property_read_bool(dev, "y-invert"))
+		props->invert_y = true;
 
-	if (of_find_property(np, "x-invert", NULL))
-		pdata->x_invert = true;
-	if (of_find_property(np, "y-invert", NULL))
-		pdata->y_invert = true;
+	props->swap_x_y = false;
 
-	return pdata;
-}
-#else
-static inline struct mms114_platform_data *mms114_parse_dt(struct device *dev)
-{
-	return NULL;
+	return 0;
 }
-#endif
 
 static int 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;
 
-	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;
-	}
-
 	if (!i2c_check_functionality(client->adapter,
 				I2C_FUNC_PROTOCOL_MANGLING)) {
 		dev_err(&client->dev,
@@ -453,8 +413,39 @@  static int mms114_probe(struct i2c_client *client,
 	}
 
 	data->client = client;
+
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_PRESSURE);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_TOUCH_MAJOR);
+
+	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+	if (mms114_parse_dt(data) < 0) {
+		/* No valid legacy binding found, try the common one */
+		touchscreen_parse_properties(input_dev, true, &data->props);
+
+		/* The firmware handles movement and pressure fuzz, so
+		 * don't duplicate that in software.
+		 */
+		data->moving_threshold =
+			input_dev->absinfo[ABS_MT_POSITION_X].fuzz;
+		data->contact_threshold =
+			input_dev->absinfo[ABS_MT_PRESSURE].fuzz;
+
+		input_dev->absinfo[ABS_MT_POSITION_X].fuzz = 0;
+		input_dev->absinfo[ABS_MT_POSITION_Y].fuzz = 0;
+		input_dev->absinfo[ABS_MT_PRESSURE].fuzz = 0;
+	} else {
+		input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+				0, data->props.max_x, 0, 0);
+		input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+				0, data->props.max_y, 0, 0);
+
+	}
+
 	data->input_dev = input_dev;
-	data->pdata = pdata;
 
 	input_dev->name = "MELFAS MMS114 Touchscreen";
 	input_dev->id.bustype = BUS_I2C;
@@ -462,21 +453,10 @@  static int mms114_probe(struct i2c_client *client,
 	input_dev->open = mms114_input_open;
 	input_dev->close = mms114_input_close;
 
-	__set_bit(EV_ABS, input_dev->evbit);
-	__set_bit(EV_KEY, input_dev->evbit);
-	__set_bit(BTN_TOUCH, input_dev->keybit);
-	input_set_abs_params(input_dev, ABS_X, 0, data->pdata->x_size, 0, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, data->pdata->y_size, 0, 0);
-
 	/* For multi touch */
 	input_mt_init_slots(input_dev, MMS114_MAX_TOUCH, 0);
 	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
 			     0, MMS114_MAX_AREA, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
-			     0, data->pdata->x_size, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
-			     0, data->pdata->y_size, 0, 0);
-	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
 
 	input_set_drvdata(input_dev, data);
 	i2c_set_clientdata(client, data);
@@ -567,13 +547,11 @@  static const struct i2c_device_id mms114_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mms114_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id mms114_dt_match[] = {
 	{ .compatible = "melfas,mms114" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mms114_dt_match);
-#endif
 
 static struct i2c_driver mms114_driver = {
 	.driver = {
diff --git a/include/linux/platform_data/mms114.h b/include/linux/platform_data/mms114.h
deleted file mode 100644
index 5722ebfb2738..000000000000
--- a/include/linux/platform_data/mms114.h
+++ /dev/null
@@ -1,24 +0,0 @@ 
-/*
- * Copyright (C) 2012 Samsung Electronics Co.Ltd
- * Author: Joonyoung Shim <jy0922.shim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundationr
- */
-
-#ifndef __LINUX_MMS114_H
-#define __LINUX_MMS114_H
-
-struct mms114_platform_data {
-	unsigned int x_size;
-	unsigned int y_size;
-	unsigned int contact_threshold;
-	unsigned int moving_threshold;
-	bool x_invert;
-	bool y_invert;
-
-	void (*cfg_pin)(bool);
-};
-
-#endif	/* __LINUX_MMS114_H */