[PATCH 0/4] MMS114 touchscreen patches

[PATCH 0/4] MMS114 touchscreen patches

[Dmitry Torokhov]

Hi,

This is a combination of couple of my patches + Simons patches dropping
support for platform data and adding support for mms152, slightly reworked.

Andi, because patches changed a bit I did not add your reviewed-by or
tested-by, please take another look.

Thanks!

Dmitry Torokhov (2):
  Input: mms114 - do not clobber interrupt trigger
  Input: mms114 - mark as direct input device

Simon Shields (2):
  Input: mms114 - drop platform data and use generic APIs
  Input: mms114 - add support for mms152

 .../bindings/input/touchscreen/mms114.txt          |  35 ++--
 drivers/input/touchscreen/mms114.c                 | 229 ++++++++++++---------
 include/linux/platform_data/mms114.h               |  24 ---
 3 files changed, 151 insertions(+), 137 deletions(-)
 delete mode 100644 include/linux/platform_data/mms114.h

-- 
Dmitry

[PATCH 1/4] Input: mms114 - do not clobber interrupt trigger

[Dmitry Torokhov]

Rely on the platform (device tree, ACPI, etc) to properly configure
interrupt trigger/polarity instead of hardcoding the falling edge.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/mms114.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index e5eeb6311f7de..92f2e9da351f1 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -497,9 +497,9 @@ static int mms114_probe(struct i2c_client *client,
 		return error;
 	}
 
-	error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
-			mms114_interrupt, IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-			dev_name(&client->dev), data);
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, mms114_interrupt, IRQF_ONESHOT,
+					  dev_name(&client->dev), data);
 	if (error) {
 		dev_err(&client->dev, "Failed to register interrupt\n");
 		return error;
-- 
2.16.0.rc1.238.g530d649a79-goog

Re: [PATCH 1/4] Input: mms114 - do not clobber interrupt trigger

[Andi Shyti]

Hi Dmitry,

On Wed, Jan 24, 2018 at 11:38:01AM -0800, Dmitry Torokhov wrote:
> Rely on the platform (device tree, ACPI, etc) to properly configure
> interrupt trigger/polarity instead of hardcoding the falling edge.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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

Thanks,
Andi

[PATCH 2/4] Input: mms114 - mark as direct input device

[Dmitry Torokhov]

mms14 is a touchscreen and thus a direct input device; let's mark it
as such. This also allows us to drop some initialization code as
input_init_mt_slots() will do that for us.

Also add error handling for input_mt_init_slots().

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/mms114.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 92f2e9da351f1..c3480db5d21ed 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -462,14 +462,6 @@ 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,
@@ -478,6 +470,11 @@ static int mms114_probe(struct i2c_client *client,
 			     0, data->pdata->y_size, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
 
+	error = input_mt_init_slots(input_dev, MMS114_MAX_TOUCH,
+				    INPUT_MT_DIRECT);
+	if (error)
+		return error;
+
 	input_set_drvdata(input_dev, data);
 	i2c_set_clientdata(client, data);
 
-- 
2.16.0.rc1.238.g530d649a79-goog

Re: [PATCH 2/4] Input: mms114 - mark as direct input device

[Andi Shyti]

Hi Dmitry,

On Wed, Jan 24, 2018 at 11:38:02AM -0800, Dmitry Torokhov wrote:
> mms14 is a touchscreen and thus a direct input device; let's mark it
> as such. This also allows us to drop some initialization code as
> input_init_mt_slots() will do that for us.
> 
> Also add error handling for input_mt_init_slots().
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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

Thanks,
Andi

[PATCH 3/4] Input: mms114 - drop platform data and use generic APIs

[Dmitry Torokhov]

From: Simon Shields <simon@lineageos.org>

The MMS114 platform data has no in-tree users, so drop it.

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>
Reviewed-by: Rob Herring <robh@kernel.org>
Patchwork-Id: 10162101
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 .../bindings/input/touchscreen/mms114.txt          |  29 ++--
 drivers/input/touchscreen/mms114.c                 | 147 +++++++++------------
 include/linux/platform_data/mms114.h               |  24 ----
 3 files changed, 82 insertions(+), 118 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 89d4c56c56711..8f9f9f38eff4a 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/mms114.c b/drivers/input/touchscreen/mms114.c
index c3480db5d21ed..69e4288bf8aa3 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_legacy_bindings(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,
@@ -454,7 +414,38 @@ static int mms114_probe(struct i2c_client *client,
 
 	data->client = client;
 	data->input_dev = input_dev;
-	data->pdata = pdata;
+
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+			     0, MMS114_MAX_AREA, 0, 0);
+
+	touchscreen_parse_properties(input_dev, true, &data->props);
+	if (!data->props.max_x || !data->props.max_y) {
+		dev_dbg(&client->dev,
+			"missing X/Y size properties, trying legacy bindings\n");
+		error = mms114_parse_legacy_bindings(data);
+		if (error)
+			return error;
+
+		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);
+	}
+
+	/*
+	 * The firmware handles movement and pressure fuzz, so
+	 * don't duplicate that in software.
+	 */
+	data->moving_threshold = input_abs_get_fuzz(input_dev,
+						    ABS_MT_POSITION_X);
+	data->contact_threshold = input_abs_get_fuzz(input_dev,
+						     ABS_MT_PRESSURE);
+	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
+	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
+	input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
 
 	input_dev->name = "MELFAS MMS114 Touchscreen";
 	input_dev->id.bustype = BUS_I2C;
@@ -462,14 +453,6 @@ static int mms114_probe(struct i2c_client *client,
 	input_dev->open = mms114_input_open;
 	input_dev->close = mms114_input_close;
 
-	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);
-
 	error = input_mt_init_slots(input_dev, MMS114_MAX_TOUCH,
 				    INPUT_MT_DIRECT);
 	if (error)
diff --git a/include/linux/platform_data/mms114.h b/include/linux/platform_data/mms114.h
deleted file mode 100644
index 5722ebfb27382..0000000000000
--- 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 */
-- 
2.16.0.rc1.238.g530d649a79-goog

Re: [PATCH 3/4] Input: mms114 - drop platform data and use generic APIs

[Andi Shyti]

Hi Simon and Dmitry,

On Wed, Jan 24, 2018 at 11:38:03AM -0800, Dmitry Torokhov wrote:
> From: Simon Shields <simon@lineageos.org>
> 
> The MMS114 platform data has no in-tree users, so drop it.
> 
> 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>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Patchwork-Id: 10162101
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

yes, looks better. I'm happy you dropped the
(mms114_parse_dt(data) < 0).

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

Thanks,
Andi

> ---
>  .../bindings/input/touchscreen/mms114.txt          |  29 ++--
>  drivers/input/touchscreen/mms114.c                 | 147 +++++++++------------
>  include/linux/platform_data/mms114.h               |  24 ----
>  3 files changed, 82 insertions(+), 118 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 89d4c56c56711..8f9f9f38eff4a 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/mms114.c b/drivers/input/touchscreen/mms114.c
> index c3480db5d21ed..69e4288bf8aa3 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_legacy_bindings(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,
> @@ -454,7 +414,38 @@ static int mms114_probe(struct i2c_client *client,
>  
>  	data->client = client;
>  	data->input_dev = input_dev;
> -	data->pdata = pdata;
> +
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
> +	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
> +	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
> +	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
> +			     0, MMS114_MAX_AREA, 0, 0);
> +
> +	touchscreen_parse_properties(input_dev, true, &data->props);
> +	if (!data->props.max_x || !data->props.max_y) {
> +		dev_dbg(&client->dev,
> +			"missing X/Y size properties, trying legacy bindings\n");
> +		error = mms114_parse_legacy_bindings(data);
> +		if (error)
> +			return error;
> +
> +		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);
> +	}
> +
> +	/*
> +	 * The firmware handles movement and pressure fuzz, so
> +	 * don't duplicate that in software.
> +	 */
> +	data->moving_threshold = input_abs_get_fuzz(input_dev,
> +						    ABS_MT_POSITION_X);
> +	data->contact_threshold = input_abs_get_fuzz(input_dev,
> +						     ABS_MT_PRESSURE);
> +	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
> +	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
> +	input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
>  
>  	input_dev->name = "MELFAS MMS114 Touchscreen";
>  	input_dev->id.bustype = BUS_I2C;
> @@ -462,14 +453,6 @@ static int mms114_probe(struct i2c_client *client,
>  	input_dev->open = mms114_input_open;
>  	input_dev->close = mms114_input_close;
>  
> -	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);
> -
>  	error = input_mt_init_slots(input_dev, MMS114_MAX_TOUCH,
>  				    INPUT_MT_DIRECT);
>  	if (error)
> diff --git a/include/linux/platform_data/mms114.h b/include/linux/platform_data/mms114.h
> deleted file mode 100644
> index 5722ebfb27382..0000000000000
> --- 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 */
> -- 
> 2.16.0.rc1.238.g530d649a79-goog
> 
> 

[PATCH 4/4] Input: mms114 - add support for mms152

[Dmitry Torokhov]

From: Simon Shields <simon@lineageos.org>

MMS152 has no configuration registers, but the packet format used in
interrupts is identical to mms114.

Signed-off-by: Simon Shields <simon@lineageos.org>
Patchwork-Id: 10125841
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 .../bindings/input/touchscreen/mms114.txt          |  6 +-
 drivers/input/touchscreen/mms114.c                 | 89 +++++++++++++++++-----
 2 files changed, 74 insertions(+), 21 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
index 8f9f9f38eff4a..2cd954051d299 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
@@ -1,7 +1,9 @@
-* MELFAS MMS114 touchscreen controller
+* MELFAS MMS114/MMS152 touchscreen controller
 
 Required properties:
-- compatible: must be "melfas,mms114"
+- compatible: should be one of:
+	- "melfas,mms114"
+	- "melfas,mms152"
 - reg: I2C address of the chip
 - interrupts: interrupt to which the chip is connected
 - touchscreen-size-x: See [1]
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 69e4288bf8aa3..06d4ce9a3e547 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/i2c.h>
 #include <linux/input/mt.h>
 #include <linux/input/touchscreen.h>
@@ -33,6 +34,9 @@
 #define MMS114_INFOMATION		0x10
 #define MMS114_TSP_REV			0xF0
 
+#define MMS152_FW_REV			0xE1
+#define MMS152_COMPAT_GROUP		0xF2
+
 /* Minimum delay time is 50us between stop and start signal of i2c */
 #define MMS114_I2C_DELAY		50
 
@@ -50,12 +54,18 @@
 #define MMS114_TYPE_TOUCHSCREEN		1
 #define MMS114_TYPE_TOUCHKEY		2
 
+enum mms_type {
+	TYPE_MMS114	= 114,
+	TYPE_MMS152	= 152,
+};
+
 struct mms114_data {
 	struct i2c_client	*client;
 	struct input_dev	*input_dev;
 	struct regulator	*core_reg;
 	struct regulator	*io_reg;
 	struct touchscreen_properties props;
+	enum mms_type		type;
 	unsigned int		contact_threshold;
 	unsigned int		moving_threshold;
 
@@ -241,12 +251,28 @@ static int mms114_get_version(struct mms114_data *data)
 	u8 buf[6];
 	int error;
 
-	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
-	if (error < 0)
-		return error;
+	switch (data->type) {
+	case TYPE_MMS152:
+		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
+		if (error)
+			return error;
+		buf[3] = i2c_smbus_read_byte_data(data->client,
+						  MMS152_COMPAT_GROUP);
+		if (buf[3] < 0)
+			return buf[3];
+		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
+			 buf[0], buf[1], buf[2], buf[3]);
+		break;
+
+	case TYPE_MMS114:
+		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
+		if (error)
+			return error;
 
-	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
-		 buf[0], buf[1], buf[3]);
+		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
+			 buf[0], buf[1], buf[3]);
+		break;
+	}
 
 	return 0;
 }
@@ -261,6 +287,10 @@ static int mms114_setup_regs(struct mms114_data *data)
 	if (error < 0)
 		return error;
 
+	/* MMS152 has no configuration or power on registers */
+	if (data->type == TYPE_MMS152)
+		return 0;
+
 	error = mms114_set_active(data, true);
 	if (error < 0)
 		return error;
@@ -395,6 +425,7 @@ static int mms114_probe(struct i2c_client *client,
 {
 	struct mms114_data *data;
 	struct input_dev *input_dev;
+	const void *match_data;
 	int error;
 
 	if (!i2c_check_functionality(client->adapter,
@@ -415,6 +446,13 @@ static int mms114_probe(struct i2c_client *client,
 	data->client = client;
 	data->input_dev = input_dev;
 
+	/* FIXME: switch to device_get_match_data() when available */
+	match_data = of_device_get_match_data(&client->dev);
+	if (!match_data)
+		return -EINVAL;
+
+	data->type = (enum mms_type)match_data;
+
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
 	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
@@ -435,19 +473,26 @@ static int mms114_probe(struct i2c_client *client,
 				     0, data->props.max_y, 0, 0);
 	}
 
-	/*
-	 * The firmware handles movement and pressure fuzz, so
-	 * don't duplicate that in software.
-	 */
-	data->moving_threshold = input_abs_get_fuzz(input_dev,
-						    ABS_MT_POSITION_X);
-	data->contact_threshold = input_abs_get_fuzz(input_dev,
-						     ABS_MT_PRESSURE);
-	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
-	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
-	input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
-
-	input_dev->name = "MELFAS MMS114 Touchscreen";
+	if (data->type == TYPE_MMS114) {
+		/*
+		 * The firmware handles movement and pressure fuzz, so
+		 * don't duplicate that in software.
+		 */
+		data->moving_threshold = input_abs_get_fuzz(input_dev,
+							    ABS_MT_POSITION_X);
+		data->contact_threshold = input_abs_get_fuzz(input_dev,
+							     ABS_MT_PRESSURE);
+		input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
+		input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
+		input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
+	}
+
+	input_dev->name = devm_kasprintf(&client->dev, GFP_KERNEL,
+					 "MELFAS MMS%d Touchscreen",
+					 data->type);
+	if (!input_dev->name)
+		return -ENOMEM;
+
 	input_dev->id.bustype = BUS_I2C;
 	input_dev->dev.parent = &client->dev;
 	input_dev->open = mms114_input_open;
@@ -549,7 +594,13 @@ MODULE_DEVICE_TABLE(i2c, mms114_id);
 
 #ifdef CONFIG_OF
 static const struct of_device_id mms114_dt_match[] = {
-	{ .compatible = "melfas,mms114" },
+	{
+		.compatible = "melfas,mms114",
+		.data = (void *)TYPE_MMS114,
+	}, {
+		.compatible = "melfas,mms152",
+		.data = (void *)TYPE_MMS152,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mms114_dt_match);
-- 
2.16.0.rc1.238.g530d649a79-goog

Re: [PATCH 4/4] Input: mms114 - add support for mms152

[Marcus Folkesson]

[-- Attachment #1: Type: text/plain, Size: 1371 bytes --]

Hello Dmitry,

On Wed, Jan 24, 2018 at 11:38:04AM -0800, Dmitry Torokhov wrote:
> From: Simon Shields <simon@lineageos.org>
> 
> @@ -241,12 +251,28 @@ static int mms114_get_version(struct mms114_data *data)
>  	u8 buf[6];
>  	int error;
>  
> -	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> -	if (error < 0)
> -		return error;
> +	switch (data->type) {
> +	case TYPE_MMS152:
> +		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
> +		if (error)
> +			return error;
> +		buf[3] = i2c_smbus_read_byte_data(data->client,
> +						  MMS152_COMPAT_GROUP);
> +		if (buf[3] < 0)
> +			return buf[3];

buf is unsigned.

Maybe
		error = i2c_smbus_read_byte_data(data->client,
						  MMS152_COMPAT_GROUP);
		if (error < 0)
			return error;
Instead?


> +		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
> +			 buf[0], buf[1], buf[2], buf[3]);
> +		break;
> +
> +	case TYPE_MMS114:
> +		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> +		if (error)
> +			return error;
>  
> -	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> -		 buf[0], buf[1], buf[3]);
> +		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> +			 buf[0], buf[1], buf[3]);
> +		break;
> +	}
>  
>  	return 0;
>  }


Best regards
Marcus Folkesson

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Re: [PATCH 4/4] Input: mms114 - add support for mms152

[Dmitry Torokhov]

On Wed, Jan 24, 2018 at 09:04:08PM +0100, Marcus Folkesson wrote:
> Hello Dmitry,
> 
> On Wed, Jan 24, 2018 at 11:38:04AM -0800, Dmitry Torokhov wrote:
> > From: Simon Shields <simon@lineageos.org>
> > 
> > @@ -241,12 +251,28 @@ static int mms114_get_version(struct mms114_data *data)
> >  	u8 buf[6];
> >  	int error;
> >  
> > -	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> > -	if (error < 0)
> > -		return error;
> > +	switch (data->type) {
> > +	case TYPE_MMS152:
> > +		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
> > +		if (error)
> > +			return error;
> > +		buf[3] = i2c_smbus_read_byte_data(data->client,
> > +						  MMS152_COMPAT_GROUP);
> > +		if (buf[3] < 0)
> > +			return buf[3];
> 
> buf is unsigned.
> 
> Maybe
> 		error = i2c_smbus_read_byte_data(data->client,
> 						  MMS152_COMPAT_GROUP);
> 		if (error < 0)
> 			return error;
> Instead?

Good catch. I think I'd rather have a separate variable "group" for
this.

Thank you.

> 
> 
> > +		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
> > +			 buf[0], buf[1], buf[2], buf[3]);
> > +		break;
> > +
> > +	case TYPE_MMS114:
> > +		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> > +		if (error)
> > +			return error;
> >  
> > -	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> > -		 buf[0], buf[1], buf[3]);
> > +		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> > +			 buf[0], buf[1], buf[3]);
> > +		break;
> > +	}
> >  
> >  	return 0;
> >  }
> 
> 
> Best regards
> Marcus Folkesson



-- 
Dmitry

[PATCH 4/4 v2] Input: mms114 - add support for mms152

[Dmitry Torokhov]

From: Simon Shields <simon@lineageos.org>

MMS152 has no configuration registers, but the packet format used in
interrupts is identical to mms114.

Signed-off-by: Simon Shields <simon@lineageos.org>
Patchwork-Id: 10125841
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

V2: Fixed issue pointed by Marcus Folkesson. 

 .../bindings/input/touchscreen/mms114.txt          |    6 +
 drivers/input/touchscreen/mms114.c                 |   92 ++++++++++++++++----
 2 files changed, 77 insertions(+), 21 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
index 8f9f9f38eff4a..2cd954051d299 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt
@@ -1,7 +1,9 @@
-* MELFAS MMS114 touchscreen controller
+* MELFAS MMS114/MMS152 touchscreen controller
 
 Required properties:
-- compatible: must be "melfas,mms114"
+- compatible: should be one of:
+	- "melfas,mms114"
+	- "melfas,mms152"
 - reg: I2C address of the chip
 - interrupts: interrupt to which the chip is connected
 - touchscreen-size-x: See [1]
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 69e4288bf8aa3..c54f4afe11037 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/i2c.h>
 #include <linux/input/mt.h>
 #include <linux/input/touchscreen.h>
@@ -33,6 +34,9 @@
 #define MMS114_INFOMATION		0x10
 #define MMS114_TSP_REV			0xF0
 
+#define MMS152_FW_REV			0xE1
+#define MMS152_COMPAT_GROUP		0xF2
+
 /* Minimum delay time is 50us between stop and start signal of i2c */
 #define MMS114_I2C_DELAY		50
 
@@ -50,12 +54,18 @@
 #define MMS114_TYPE_TOUCHSCREEN		1
 #define MMS114_TYPE_TOUCHKEY		2
 
+enum mms_type {
+	TYPE_MMS114	= 114,
+	TYPE_MMS152	= 152,
+};
+
 struct mms114_data {
 	struct i2c_client	*client;
 	struct input_dev	*input_dev;
 	struct regulator	*core_reg;
 	struct regulator	*io_reg;
 	struct touchscreen_properties props;
+	enum mms_type		type;
 	unsigned int		contact_threshold;
 	unsigned int		moving_threshold;
 
@@ -239,14 +249,33 @@ static int mms114_get_version(struct mms114_data *data)
 {
 	struct device *dev = &data->client->dev;
 	u8 buf[6];
+	int group;
 	int error;
 
-	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
-	if (error < 0)
-		return error;
+	switch (data->type) {
+	case TYPE_MMS152:
+		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
+		if (error)
+			return error;
+
+		group = i2c_smbus_read_byte_data(data->client,
+						  MMS152_COMPAT_GROUP);
+		if (group < 0)
+			return group;
+
+		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
+			 buf[0], buf[1], buf[2], group);
+		break;
+
+	case TYPE_MMS114:
+		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
+		if (error)
+			return error;
 
-	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
-		 buf[0], buf[1], buf[3]);
+		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
+			 buf[0], buf[1], buf[3]);
+		break;
+	}
 
 	return 0;
 }
@@ -261,6 +290,10 @@ static int mms114_setup_regs(struct mms114_data *data)
 	if (error < 0)
 		return error;
 
+	/* MMS152 has no configuration or power on registers */
+	if (data->type == TYPE_MMS152)
+		return 0;
+
 	error = mms114_set_active(data, true);
 	if (error < 0)
 		return error;
@@ -395,6 +428,7 @@ static int mms114_probe(struct i2c_client *client,
 {
 	struct mms114_data *data;
 	struct input_dev *input_dev;
+	const void *match_data;
 	int error;
 
 	if (!i2c_check_functionality(client->adapter,
@@ -415,6 +449,13 @@ static int mms114_probe(struct i2c_client *client,
 	data->client = client;
 	data->input_dev = input_dev;
 
+	/* FIXME: switch to device_get_match_data() when available */
+	match_data = of_device_get_match_data(&client->dev);
+	if (!match_data)
+		return -EINVAL;
+
+	data->type = (enum mms_type)match_data;
+
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
 	input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
@@ -435,19 +476,26 @@ static int mms114_probe(struct i2c_client *client,
 				     0, data->props.max_y, 0, 0);
 	}
 
-	/*
-	 * The firmware handles movement and pressure fuzz, so
-	 * don't duplicate that in software.
-	 */
-	data->moving_threshold = input_abs_get_fuzz(input_dev,
-						    ABS_MT_POSITION_X);
-	data->contact_threshold = input_abs_get_fuzz(input_dev,
-						     ABS_MT_PRESSURE);
-	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
-	input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
-	input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
-
-	input_dev->name = "MELFAS MMS114 Touchscreen";
+	if (data->type == TYPE_MMS114) {
+		/*
+		 * The firmware handles movement and pressure fuzz, so
+		 * don't duplicate that in software.
+		 */
+		data->moving_threshold = input_abs_get_fuzz(input_dev,
+							    ABS_MT_POSITION_X);
+		data->contact_threshold = input_abs_get_fuzz(input_dev,
+							     ABS_MT_PRESSURE);
+		input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0);
+		input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0);
+		input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0);
+	}
+
+	input_dev->name = devm_kasprintf(&client->dev, GFP_KERNEL,
+					 "MELFAS MMS%d Touchscreen",
+					 data->type);
+	if (!input_dev->name)
+		return -ENOMEM;
+
 	input_dev->id.bustype = BUS_I2C;
 	input_dev->dev.parent = &client->dev;
 	input_dev->open = mms114_input_open;
@@ -549,7 +597,13 @@ MODULE_DEVICE_TABLE(i2c, mms114_id);
 
 #ifdef CONFIG_OF
 static const struct of_device_id mms114_dt_match[] = {
-	{ .compatible = "melfas,mms114" },
+	{
+		.compatible = "melfas,mms114",
+		.data = (void *)TYPE_MMS114,
+	}, {
+		.compatible = "melfas,mms152",
+		.data = (void *)TYPE_MMS152,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mms114_dt_match);

Re: [PATCH 4/4 v2] Input: mms114 - add support for mms152

[Andi Shyti]

Hi Simon and Dmitry,

On Wed, Jan 24, 2018 at 01:32:01PM -0800, Dmitry Torokhov wrote:
> From: Simon Shields <simon@lineageos.org>
> 
> MMS152 has no configuration registers, but the packet format used in
> interrupts is identical to mms114.
> 
> Signed-off-by: Simon Shields <simon@lineageos.org>
> Patchwork-Id: 10125841
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

also here

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

one small nitpick:

> @@ -239,14 +249,33 @@ static int mms114_get_version(struct mms114_data *data)
>  {
>  	struct device *dev = &data->client->dev;
>  	u8 buf[6];
> +	int group;
>  	int error;

do we really need to define a new 'group' variable?

Andi

> -	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> -	if (error < 0)
> -		return error;
> +	switch (data->type) {
> +	case TYPE_MMS152:
> +		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
> +		if (error)
> +			return error;
> +
> +		group = i2c_smbus_read_byte_data(data->client,
> +						  MMS152_COMPAT_GROUP);
> +		if (group < 0)
> +			return group;
> +
> +		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
> +			 buf[0], buf[1], buf[2], group);
> +		break;
> +
> +	case TYPE_MMS114:
> +		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> +		if (error)
> +			return error;
>  
> -	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> -		 buf[0], buf[1], buf[3]);
> +		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> +			 buf[0], buf[1], buf[3]);
> +		break;
> +	}
>  
>  	return 0;
>  }

Re: [PATCH 4/4 v2] Input: mms114 - add support for mms152

[Dmitry Torokhov]

On Fri, Jan 26, 2018 at 02:14:38PM +0900, Andi Shyti wrote:
> Hi Simon and Dmitry,
> 
> On Wed, Jan 24, 2018 at 01:32:01PM -0800, Dmitry Torokhov wrote:
> > From: Simon Shields <simon@lineageos.org>
> > 
> > MMS152 has no configuration registers, but the packet format used in
> > interrupts is identical to mms114.
> > 
> > Signed-off-by: Simon Shields <simon@lineageos.org>
> > Patchwork-Id: 10125841
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> also here
> 
> Reviewed-by: Andi Shyti <andi.shyti@samsung.com>
> Tested-by: Andi Shyti <andi.shyti@samsung.com>
> 
> one small nitpick:
> 
> > @@ -239,14 +249,33 @@ static int mms114_get_version(struct mms114_data *data)
> >  {
> >  	struct device *dev = &data->client->dev;
> >  	u8 buf[6];
> > +	int group;
> >  	int error;
> 
> do we really need to define a new 'group' variable?

I like it, that's why I added it ;)

As Marcus mentioned, we cant use 'buf' to store the value as buf is
unsigned and i2c_smbus_read_byte_data() may return negative error code.
And I do not want to use 'error' variable because logically we are
trying to get group value, not error. Hence a dedicated variable. It's
gonna be optimized away anyway.

Thanks.

> 
> Andi
> 
> > -	error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> > -	if (error < 0)
> > -		return error;
> > +	switch (data->type) {
> > +	case TYPE_MMS152:
> > +		error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf);
> > +		if (error)
> > +			return error;
> > +
> > +		group = i2c_smbus_read_byte_data(data->client,
> > +						  MMS152_COMPAT_GROUP);
> > +		if (group < 0)
> > +			return group;
> > +
> > +		dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n",
> > +			 buf[0], buf[1], buf[2], group);
> > +		break;
> > +
> > +	case TYPE_MMS114:
> > +		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
> > +		if (error)
> > +			return error;
> >  
> > -	dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> > -		 buf[0], buf[1], buf[3]);
> > +		dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
> > +			 buf[0], buf[1], buf[3]);
> > +		break;
> > +	}
> >  
> >  	return 0;
> >  }

-- 
Dmitry

Re: [PATCH 0/4] MMS114 touchscreen patches

[Simon Shields]

Hi Dmitry,

Thanks for the extra fixes!

On Wed, Jan 24, 2018 at 11:38:00AM -0800, Dmitry Torokhov wrote:
> Hi,
> 
> This is a combination of couple of my patches + Simons patches dropping
> support for platform data and adding support for mms152, slightly reworked.
> 
> Andi, because patches changed a bit I did not add your reviewed-by or
> tested-by, please take another look.
> 
> Thanks!
> 
> Dmitry Torokhov (2):
>   Input: mms114 - do not clobber interrupt trigger
>   Input: mms114 - mark as direct input device
> 
> Simon Shields (2):
>   Input: mms114 - drop platform data and use generic APIs
>   Input: mms114 - add support for mms152
> 
>  .../bindings/input/touchscreen/mms114.txt          |  35 ++--
>  drivers/input/touchscreen/mms114.c                 | 229 ++++++++++++---------
>  include/linux/platform_data/mms114.h               |  24 ---
>  3 files changed, 151 insertions(+), 137 deletions(-)
>  delete mode 100644 include/linux/platform_data/mms114.h
> 
> -- 
> Dmitry
> 

All looks good to me. Tested on MMS114 and MMS152.

Reviewed-by: Simon Shields <simon@lineageos.org>
Tested-by: Simon Shields <simon@lineageos.org>

Cheers,
Simon