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authorSimon Shields <simon@lineageos.org>2018-01-22 17:45:09 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2018-01-26 11:27:23 -0800
commit5b0d0033f3f3a3d09178ef0dcdd0d4e1a08666b8 (patch)
tree256d2a9bbb1c670c6802392ef35f6a045ef9ad60 /drivers/input/touchscreen
parent477baf7e9a45538f984216acba371b8bd190d4f3 (diff)
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>
Diffstat (limited to 'drivers/input/touchscreen')
-rw-r--r--drivers/input/touchscreen/mms114.c147
1 files changed, 65 insertions, 82 deletions
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index c3480db5d21e..69e4288bf8aa 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)

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