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Input: mms114 - drop platform data and use generic APIs 

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>
Reviewed-by: Andi Shyti <andi.shyti@samsung.com>
Tested-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Simon Shields 2018-01-22 17:45:09 -08:00 committed by Dmitry Torokhov
parent 477baf7e9a
commit 5b0d0033f3
3 changed files with 82 additions and 118 deletions
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29
Documentation/devicetree/bindings/input/touchscreen/mms114.txt
View File

@ -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;
};
/* ... */

147
drivers/input/touchscreen/mms114.c
View File

@ -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;
struct device *dev = &data->client->dev;
struct touchscreen_properties *props = &data->props;
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 (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;
return 0;
}
#else
static inline struct mms114_platform_data *mms114_parse_dt(struct device *dev)
{
return NULL;
}
#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)

24
include/linux/platform_data/mms114.h
View File

@ -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 */