From: Petr Hodina <petr.hodina@protonmail.com>
Introduce basic FTS5 support.
FTS support SLPI and AP mode, introduce mode-switch GPIO to switch between
those two. Currently we can handle only full power AP mode, so we just
keep the AP on.
Useful for devices like Pixel 3 (blueline) and many others.
Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
Co-developed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
drivers/input/touchscreen/stmfts.c | 481 +++++++++++++++++++++++++++++++++++--
1 file changed, 460 insertions(+), 21 deletions(-)
diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c
index 04110006f54a0..e0fa1c4af1987 100644
--- a/drivers/input/touchscreen/stmfts.c
+++ b/drivers/input/touchscreen/stmfts.c
@@ -1,8 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
-// STMicroelectronics FTS Touchscreen device driver
-//
-// Copyright (c) 2017 Samsung Electronics Co., Ltd.
-// Copyright (c) 2017 Andi Shyti <andi@etezian.org>
+/* STMicroelectronics FTS Touchscreen device driver
+ *
+ * Copyright 2017 Samsung Electronics Co., Ltd.
+ * Copyright 2017 Andi Shyti <andi@etezian.org>
+ * Copyright David Heidelberg <david@ixit.cz>
+ * Copyright Petr Hodina <petr.hodina@protonmail.com>
+ */
#include <linux/delay.h>
#include <linux/i2c.h>
@@ -12,6 +15,7 @@
#include <linux/irq.h>
#include <linux/leds.h>
#include <linux/module.h>
+#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
@@ -34,6 +38,7 @@
#define STMFTS_FULL_FORCE_CALIBRATION 0xa2
#define STMFTS_MS_CX_TUNING 0xa3
#define STMFTS_SS_CX_TUNING 0xa4
+#define STMFTS5_SET_SCAN_MODE 0xa0
/* events */
#define STMFTS_EV_NO_EVENT 0x00
@@ -51,12 +56,32 @@
#define STMFTS_EV_STATUS 0x16
#define STMFTS_EV_DEBUG 0xdb
+/* events FTS5 */
+#define STMFTS5_EV_CONTROLLER_READY 0x03
+/* FTM5 event IDs (full byte, not masked) */
+#define STMFTS5_EV_MULTI_TOUCH_ENTER 0x13
+#define STMFTS5_EV_MULTI_TOUCH_MOTION 0x23
+#define STMFTS5_EV_MULTI_TOUCH_LEAVE 0x33
+#define STMFTS5_EV_STATUS_UPDATE 0x43
+#define STMFTS5_EV_USER_REPORT 0x53
+#define STMFTS5_EV_DEBUG 0xe3
+#define STMFTS5_EV_ERROR 0xf3
+
/* multi touch related event masks */
#define STMFTS_MASK_EVENT_ID 0x0f
#define STMFTS_MASK_TOUCH_ID 0xf0
#define STMFTS_MASK_LEFT_EVENT 0x0f
#define STMFTS_MASK_X_MSB 0x0f
#define STMFTS_MASK_Y_LSB 0xf0
+#define STMFTS5_MASK_TOUCH_TYPE 0x0f
+
+/* touch type classifications */
+#define STMFTS_TOUCH_TYPE_INVALID 0x00
+#define STMFTS_TOUCH_TYPE_FINGER 0x01
+#define STMFTS_TOUCH_TYPE_GLOVE 0x02
+#define STMFTS_TOUCH_TYPE_STYLUS 0x03
+#define STMFTS_TOUCH_TYPE_PALM 0x04
+#define STMFTS_TOUCH_TYPE_HOVER 0x05
/* key related event masks */
#define STMFTS_MASK_KEY_NO_TOUCH 0x00
@@ -75,9 +100,12 @@ static const struct regulator_bulk_data stmfts_supplies[] = {
};
struct stmfts_data {
+ const struct stmfts_chip_ops *ops;
+
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
+ struct gpio_desc *mode_switch_gpio;
struct led_classdev led_cdev;
struct mutex mutex;
@@ -101,12 +129,24 @@ struct stmfts_data {
struct completion cmd_done;
+ unsigned long touch_id;
+ unsigned long stylus_id;
+
+ bool is_fts5;
bool use_key;
bool led_status;
bool hover_enabled;
+ bool stylus_enabled;
bool running;
};
+struct stmfts_chip_ops {
+ int (*power_on)(struct stmfts_data *sdata);
+ int (*input_open)(struct input_dev *dev);
+ void (*input_close)(struct input_dev *dev);
+ void (*parse_events)(struct stmfts_data *sdata);
+};
+
static int stmfts_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
@@ -169,6 +209,7 @@ static int stmfts_read_events(struct stmfts_data *sdata)
return ret == ARRAY_SIZE(msgs) ? 0 : -EIO;
}
+/* FTS4 event handling functions */
static void stmfts_report_contact_event(struct stmfts_data *sdata,
const u8 event[])
{
@@ -204,6 +245,157 @@ static void stmfts_report_contact_release(struct stmfts_data *sdata,
input_sync(sdata->input);
}
+/* FTS5 event handling functions */
+static void stmfts5_report_contact_event(struct stmfts_data *sdata,
+ const u8 event[])
+{
+ u8 area;
+ u8 maj;
+ u8 min;
+ /* FTM5 event format:
+ * event[0] = event ID (0x13/0x23)
+ * event[1] = touch type (low 4 bits) | touch ID (high 4 bits)
+ * event[2] = X LSB
+ * event[3] = X MSB (low 4 bits) | Y MSB (high 4 bits)
+ * event[4] = Y LSB
+ * event[5] = pressure
+ * event[6] = major (low 4 bits) | minor (high 4 bits)
+ * event[7] = minor (high 2 bits)
+ */
+ u8 touch_id = (event[1] & STMFTS_MASK_TOUCH_ID) >> 4;
+ u8 touch_type = event[1] & STMFTS5_MASK_TOUCH_TYPE;
+ int x, y, distance;
+ unsigned int tool = MT_TOOL_FINGER;
+ bool touch_condition = true;
+
+ /* Parse coordinates with better precision */
+ x = (((int)event[3] & STMFTS_MASK_X_MSB) << 8) | event[2];
+ y = ((int)event[4] << 4) | ((event[3] & STMFTS_MASK_Y_LSB) >> 4);
+
+ /* Parse pressure - ensure non-zero for active touch */
+ area = event[5];
+ if (area <= 0 && touch_type != STMFTS_TOUCH_TYPE_HOVER) {
+ /* Should not happen for contact events. Set minimum pressure
+ * to prevent touch from being dropped
+ */
+ dev_warn_once(&sdata->client->dev,
+ "zero pressure on contact event, slot %d\n", touch_id);
+ area = 1;
+ }
+
+ /* Parse touch area with improved bit extraction */
+ maj = (((event[0] & 0x0C) << 2) | ((event[6] & 0xF0) >> 4));
+ min = (((event[7] & 0xC0) >> 2) | (event[6] & 0x0F));
+
+ /* Distance is 0 for touching, max for hovering */
+ distance = 0;
+
+ /* Classify touch type and set appropriate tool and parameters */
+ switch (touch_type) {
+ case STMFTS_TOUCH_TYPE_STYLUS:
+ if (sdata->stylus_enabled) {
+ tool = MT_TOOL_PEN;
+ __set_bit(touch_id, &sdata->stylus_id);
+ __clear_bit(touch_id, &sdata->touch_id);
+ break;
+ }
+ fallthrough; /* Report as finger if stylus not enabled */
+
+ case STMFTS_TOUCH_TYPE_FINGER:
+ case STMFTS_TOUCH_TYPE_GLOVE:
+ tool = MT_TOOL_FINGER;
+ __set_bit(touch_id, &sdata->touch_id);
+ __clear_bit(touch_id, &sdata->stylus_id);
+ break;
+
+ case STMFTS_TOUCH_TYPE_PALM:
+ /* Palm touch - report but can be filtered by userspace */
+ tool = MT_TOOL_PALM;
+ __set_bit(touch_id, &sdata->touch_id);
+ __clear_bit(touch_id, &sdata->stylus_id);
+ break;
+
+ case STMFTS_TOUCH_TYPE_HOVER:
+ tool = MT_TOOL_FINGER;
+ touch_condition = false;
+ area = 0;
+ distance = 255;
+ __set_bit(touch_id, &sdata->touch_id);
+ __clear_bit(touch_id, &sdata->stylus_id);
+ break;
+
+ case STMFTS_TOUCH_TYPE_INVALID:
+ default:
+ dev_warn(&sdata->client->dev,
+ "invalid touch type %d for slot %d\n",
+ touch_type, touch_id);
+ return;
+ }
+
+ /* Boundary check - some devices report max value, adjust */
+ if (x >= sdata->prop.max_x)
+ x = sdata->prop.max_x - 1;
+ if (y >= sdata->prop.max_y)
+ y = sdata->prop.max_y - 1;
+
+ input_mt_slot(sdata->input, touch_id);
+ input_report_key(sdata->input, BTN_TOUCH, touch_condition);
+ input_mt_report_slot_state(sdata->input, tool, true);
+
+ input_report_abs(sdata->input, ABS_MT_POSITION_X, x);
+ input_report_abs(sdata->input, ABS_MT_POSITION_Y, y);
+ input_report_abs(sdata->input, ABS_MT_TOUCH_MAJOR, maj);
+ input_report_abs(sdata->input, ABS_MT_TOUCH_MINOR, min);
+ input_report_abs(sdata->input, ABS_MT_PRESSURE, area);
+ input_report_abs(sdata->input, ABS_MT_DISTANCE, distance);
+
+ input_sync(sdata->input);
+}
+
+static void stmfts5_report_contact_release(struct stmfts_data *sdata,
+ const u8 event[])
+{
+ /* FTM5 format: touch ID is in high 4 bits of event[1] */
+ u8 touch_id = (event[1] & STMFTS_MASK_TOUCH_ID) >> 4;
+ u8 touch_type = event[1] & STMFTS5_MASK_TOUCH_TYPE;
+ unsigned int tool = MT_TOOL_FINGER;
+
+ /* Determine tool type based on touch classification */
+ switch (touch_type) {
+ case STMFTS_TOUCH_TYPE_STYLUS:
+ if (sdata->stylus_enabled) {
+ tool = MT_TOOL_PEN;
+ __clear_bit(touch_id, &sdata->stylus_id);
+ } else {
+ __clear_bit(touch_id, &sdata->touch_id);
+ }
+ break;
+
+ case STMFTS_TOUCH_TYPE_PALM:
+ tool = MT_TOOL_PALM;
+ __clear_bit(touch_id, &sdata->touch_id);
+ break;
+
+ case STMFTS_TOUCH_TYPE_FINGER:
+ case STMFTS_TOUCH_TYPE_GLOVE:
+ case STMFTS_TOUCH_TYPE_HOVER:
+ default:
+ tool = MT_TOOL_FINGER;
+ __clear_bit(touch_id, &sdata->touch_id);
+ break;
+ }
+
+ input_mt_slot(sdata->input, touch_id);
+ input_report_abs(sdata->input, ABS_MT_PRESSURE, 0);
+ input_mt_report_slot_state(sdata->input, tool, false);
+
+ /* Report BTN_TOUCH only if no touches remain */
+ if (!sdata->touch_id && !sdata->stylus_id)
+ input_report_key(sdata->input, BTN_TOUCH, 0);
+
+ input_sync(sdata->input);
+}
+
static void stmfts_report_hover_event(struct stmfts_data *sdata,
const u8 event[])
{
@@ -251,7 +443,6 @@ static void stmfts_parse_events(struct stmfts_data *sdata)
u8 *event = &sdata->data[i * STMFTS_EVENT_SIZE];
switch (event[0]) {
-
case STMFTS_EV_CONTROLLER_READY:
case STMFTS_EV_SLEEP_OUT_CONTROLLER_READY:
case STMFTS_EV_STATUS:
@@ -264,7 +455,6 @@ static void stmfts_parse_events(struct stmfts_data *sdata)
}
switch (event[0] & STMFTS_MASK_EVENT_ID) {
-
case STMFTS_EV_MULTI_TOUCH_ENTER:
case STMFTS_EV_MULTI_TOUCH_MOTION:
stmfts_report_contact_event(sdata, event);
@@ -298,6 +488,45 @@ static void stmfts_parse_events(struct stmfts_data *sdata)
}
}
+static void stmfts5_parse_events(struct stmfts_data *sdata)
+{
+ for (int i = 0; i < STMFTS_STACK_DEPTH; i++) {
+ u8 *event = &sdata->data[i * STMFTS_EVENT_SIZE];
+
+ switch (event[0]) {
+ case STMFTS5_EV_CONTROLLER_READY:
+ complete(&sdata->cmd_done);
+ fallthrough;
+
+ case STMFTS_EV_NO_EVENT:
+ case STMFTS5_EV_STATUS_UPDATE:
+ case STMFTS5_EV_USER_REPORT:
+ case STMFTS5_EV_DEBUG:
+ return;
+
+ case STMFTS5_EV_MULTI_TOUCH_ENTER:
+ case STMFTS5_EV_MULTI_TOUCH_MOTION:
+ stmfts5_report_contact_event(sdata, event);
+ break;
+
+ case STMFTS5_EV_MULTI_TOUCH_LEAVE:
+ stmfts5_report_contact_release(sdata, event);
+ break;
+
+ case STMFTS5_EV_ERROR:
+ dev_warn(&sdata->client->dev,
+ "error code: 0x%x%x%x%x%x%x",
+ event[6], event[5], event[4],
+ event[3], event[2], event[1]);
+ break;
+
+ default:
+ dev_err(&sdata->client->dev,
+ "unknown FTS5 event %#02x\n", event[0]);
+ }
+ }
+}
+
static irqreturn_t stmfts_irq_handler(int irq, void *dev)
{
struct stmfts_data *sdata = dev;
@@ -310,7 +539,7 @@ static irqreturn_t stmfts_irq_handler(int irq, void *dev)
dev_err(&sdata->client->dev,
"failed to read events: %d\n", err);
else
- stmfts_parse_events(sdata);
+ sdata->ops->parse_events(sdata);
return IRQ_HANDLED;
}
@@ -332,6 +561,25 @@ static int stmfts_command(struct stmfts_data *sdata, const u8 cmd)
return 0;
}
+static int stmfts5_set_scan_mode(struct stmfts_data *sdata, const u8 val)
+{
+ int err;
+
+ u8 scan_mode_cmd[3] = { STMFTS5_SET_SCAN_MODE, 0x00, val };
+ struct i2c_msg msg = {
+ .addr = sdata->client->addr,
+ .len = sizeof(scan_mode_cmd),
+ .buf = scan_mode_cmd,
+ };
+
+ err = i2c_transfer(sdata->client->adapter, &msg, 1);
+ if (err != 1)
+ return err < 0 ? err : -EIO;
+
+ return 0;
+
+}
+
static int stmfts_input_open(struct input_dev *dev)
{
struct stmfts_data *sdata = input_get_drvdata(dev);
@@ -371,6 +619,28 @@ static int stmfts_input_open(struct input_dev *dev)
return 0;
}
+static int stmfts5_input_open(struct input_dev *dev)
+{
+ struct stmfts_data *sdata = input_get_drvdata(dev);
+ int err;
+
+ err = pm_runtime_resume_and_get(&sdata->client->dev);
+ if (err)
+ return err;
+
+ mutex_lock(&sdata->mutex);
+ sdata->running = true;
+ mutex_unlock(&sdata->mutex);
+
+ err = stmfts5_set_scan_mode(sdata, 0xff);
+ if (err) {
+ pm_runtime_put_sync(&sdata->client->dev);
+ return err;
+ }
+
+ return 0;
+}
+
static void stmfts_input_close(struct input_dev *dev)
{
struct stmfts_data *sdata = input_get_drvdata(dev);
@@ -404,6 +674,23 @@ static void stmfts_input_close(struct input_dev *dev)
pm_runtime_put_sync(&sdata->client->dev);
}
+static void stmfts5_input_close(struct input_dev *dev)
+{
+ struct stmfts_data *sdata = input_get_drvdata(dev);
+ int err;
+
+ err = stmfts5_set_scan_mode(sdata, 0x00);
+ if (err)
+ dev_warn(&sdata->client->dev,
+ "failed to disable touchscreen: %d\n", err);
+
+ mutex_lock(&sdata->mutex);
+ sdata->running = false;
+ mutex_unlock(&sdata->mutex);
+
+ pm_runtime_put_sync(&sdata->client->dev);
+}
+
static ssize_t stmfts_sysfs_chip_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -484,7 +771,7 @@ static ssize_t stmfts_sysfs_hover_enable_write(struct device *dev,
guard(mutex)(&sdata->mutex);
if (hover != sdata->hover_enabled) {
- if (sdata->running) {
+ if (sdata->running && !sdata->is_fts5) {
err = i2c_smbus_write_byte(sdata->client,
value ? STMFTS_SS_HOVER_SENSE_ON :
STMFTS_SS_HOVER_SENSE_OFF);
@@ -614,6 +901,41 @@ static int stmfts_power_on(struct stmfts_data *sdata)
return err;
}
+static int stmfts5_power_on(struct stmfts_data *sdata)
+{
+ int err, ret;
+ u8 event[STMFTS_EVENT_SIZE];
+
+ err = regulator_bulk_enable(ARRAY_SIZE(stmfts_supplies),
+ sdata->supplies);
+ if (err)
+ return err;
+
+ /* Power stabilization delay */
+ msleep(20);
+
+ if (sdata->reset_gpio)
+ stmfts_reset(sdata);
+
+ /* Verify I2C communication */
+ ret = i2c_smbus_read_i2c_block_data(sdata->client,
+ STMFTS_READ_ALL_EVENT,
+ sizeof(event), event);
+ if (ret < 0) {
+ err = ret;
+ goto power_off;
+ }
+
+ enable_irq(sdata->client->irq);
+
+ return 0;
+
+power_off:
+ regulator_bulk_disable(ARRAY_SIZE(stmfts_supplies),
+ sdata->supplies);
+ return err;
+}
+
static void stmfts_power_off(void *data)
{
struct stmfts_data *sdata = data;
@@ -623,6 +945,11 @@ static void stmfts_power_off(void *data)
if (sdata->reset_gpio)
gpiod_set_value_cansleep(sdata->reset_gpio, 1);
+ if (sdata->is_fts5) {
+ i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_IN);
+ msleep(20);
+ }
+
regulator_bulk_disable(ARRAY_SIZE(stmfts_supplies),
sdata->supplies);
}
@@ -656,6 +983,7 @@ static int stmfts_probe(struct i2c_client *client)
struct device *dev = &client->dev;
int err;
struct stmfts_data *sdata;
+ const struct of_device_id *match;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE_DATA |
@@ -672,6 +1000,13 @@ static int stmfts_probe(struct i2c_client *client)
mutex_init(&sdata->mutex);
init_completion(&sdata->cmd_done);
+ match = of_match_device(dev->driver->of_match_table, dev);
+ sdata->ops = of_device_get_match_data(dev);
+ if (match && of_device_is_compatible(dev->of_node, "st,stmfts5"))
+ sdata->is_fts5 = true;
+ else
+ sdata->is_fts5 = false;
+
err = devm_regulator_bulk_get_const(dev,
ARRAY_SIZE(stmfts_supplies),
stmfts_supplies,
@@ -685,34 +1020,80 @@ static int stmfts_probe(struct i2c_client *client)
return dev_err_probe(dev, PTR_ERR(sdata->reset_gpio),
"Failed to get GPIO 'reset'\n");
+ if (sdata->is_fts5) {
+ sdata->mode_switch_gpio = devm_gpiod_get_optional(&client->dev,
+ "mode-switch",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(sdata->mode_switch_gpio))
+ return dev_err_probe(dev, PTR_ERR(sdata->mode_switch_gpio),
+ "Failed to get GPIO 'switch'\n");
+
+ }
+
sdata->input = devm_input_allocate_device(dev);
if (!sdata->input)
return -ENOMEM;
sdata->input->name = STMFTS_DEV_NAME;
sdata->input->id.bustype = BUS_I2C;
- sdata->input->open = stmfts_input_open;
- sdata->input->close = stmfts_input_close;
+ sdata->input->open = sdata->ops->input_open;
+ sdata->input->close = sdata->ops->input_close;
+
+ /* FTS5-specific input properties */
+ if (sdata->is_fts5) {
+ /* Mark as direct input device for calibration support */
+ __set_bit(INPUT_PROP_DIRECT, sdata->input->propbit);
+
+ /* Set up basic touch capabilities */
+ input_set_capability(sdata->input, EV_KEY, BTN_TOUCH);
+ }
input_set_capability(sdata->input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(sdata->input, EV_ABS, ABS_MT_POSITION_Y);
touchscreen_parse_properties(sdata->input, true, &sdata->prop);
+ /* Set resolution for accurate calibration (FTS5) */
+ if (sdata->is_fts5 && !input_abs_get_res(sdata->input, ABS_MT_POSITION_X)) {
+ input_abs_set_res(sdata->input, ABS_MT_POSITION_X, 10);
+ input_abs_set_res(sdata->input, ABS_MT_POSITION_Y, 10);
+ }
+
+ /* Enhanced MT parameters */
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
- input_set_abs_params(sdata->input, ABS_MT_ORIENTATION, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
- input_set_abs_params(sdata->input, ABS_DISTANCE, 0, 255, 0, 0);
+
+ if (sdata->is_fts5) {
+ input_set_abs_params(sdata->input, ABS_MT_DISTANCE, 0, 255, 0, 0);
+
+ /* Enable stylus support if requested */
+ sdata->stylus_enabled = device_property_read_bool(dev,
+ "stylus-enabled");
+ } else {
+ input_set_abs_params(sdata->input, ABS_MT_ORIENTATION, 0, 255, 0, 0);
+ input_set_abs_params(sdata->input, ABS_DISTANCE, 0, 255, 0, 0);
+ }
sdata->use_key = device_property_read_bool(dev,
"touch-key-connected");
- if (sdata->use_key) {
+ if (sdata->use_key && !sdata->is_fts5) {
input_set_capability(sdata->input, EV_KEY, KEY_MENU);
input_set_capability(sdata->input, EV_KEY, KEY_BACK);
}
- err = input_mt_init_slots(sdata->input,
- STMFTS_MAX_FINGERS, INPUT_MT_DIRECT);
+ /* Initialize touch tracking bitmaps (FTS5) */
+ if (sdata->is_fts5) {
+ sdata->touch_id = 0;
+ sdata->stylus_id = 0;
+
+ /* Initialize MT slots with support for pen tool type */
+ err = input_mt_init_slots(sdata->input, STMFTS_MAX_FINGERS,
+ INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+ } else {
+ err = input_mt_init_slots(sdata->input, STMFTS_MAX_FINGERS,
+ INPUT_MT_DIRECT);
+ }
+
if (err)
return err;
@@ -732,9 +1113,11 @@ static int stmfts_probe(struct i2c_client *client)
if (err)
return err;
- dev_dbg(dev, "initializing ST-Microelectronics FTS...\n");
+ dev_dbg(dev, "initializing ST-Microelectronics FTS%s...\n",
+ sdata->is_fts5 ? "5" : "");
+
- err = stmfts_power_on(sdata);
+ err = sdata->ops->power_on(sdata);
if (err)
return err;
@@ -746,7 +1129,7 @@ static int stmfts_probe(struct i2c_client *client)
if (err)
return err;
- if (sdata->use_key) {
+ if (sdata->use_key && !sdata->is_fts5) {
err = stmfts_enable_led(sdata);
if (err) {
/*
@@ -790,8 +1173,47 @@ static int stmfts_runtime_resume(struct device *dev)
int ret;
ret = i2c_smbus_write_byte(client, STMFTS_SLEEP_OUT);
- if (ret)
+ if (ret) {
dev_err(dev, "failed to resume device: %d\n", ret);
+ return ret;
+ }
+
+ if (sdata->is_fts5) {
+ msleep(20);
+
+ /* Perform capacitance tuning after wakeup */
+ ret = i2c_smbus_write_byte(client, STMFTS_MS_CX_TUNING);
+ if (ret)
+ dev_warn(dev, "MS_CX_TUNING failed: %d\n", ret);
+ msleep(20);
+
+ ret = i2c_smbus_write_byte(client, STMFTS_SS_CX_TUNING);
+ if (ret)
+ dev_warn(dev, "SS_CX_TUNING failed: %d\n", ret);
+ msleep(20);
+
+ /* Force calibration */
+ ret = i2c_smbus_write_byte(client, STMFTS_FULL_FORCE_CALIBRATION);
+ if (ret)
+ dev_warn(dev, "FORCE_CALIBRATION failed: %d\n", ret);
+ msleep(50);
+
+ /* Enable controller interrupts */
+ u8 int_enable_cmd[4] = {0xB6, 0x00, 0x2C, 0x01};
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .len = 4,
+ .buf = int_enable_cmd,
+ };
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret != 1)
+ return ret < 0 ? ret : -EIO;
+
+ msleep(20);
+
+ return 0;
+ }
return ret;
}
@@ -809,7 +1231,7 @@ static int stmfts_resume(struct device *dev)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
- return stmfts_power_on(sdata);
+ return sdata->ops->power_on(sdata);
}
static const struct dev_pm_ops stmfts_pm_ops = {
@@ -818,8 +1240,23 @@ static const struct dev_pm_ops stmfts_pm_ops = {
};
#ifdef CONFIG_OF
+static const struct stmfts_chip_ops stmfts4_ops = {
+ .power_on = stmfts_power_on,
+ .input_open = stmfts_input_open,
+ .input_close = stmfts_input_close,
+ .parse_events = stmfts_parse_events,
+};
+
+static const struct stmfts_chip_ops stmfts5_ops = {
+ .power_on = stmfts5_power_on,
+ .input_open = stmfts5_input_open,
+ .input_close = stmfts5_input_close,
+ .parse_events = stmfts5_parse_events,
+};
+
static const struct of_device_id stmfts_of_match[] = {
- { .compatible = "st,stmfts", },
+ { .compatible = "st,stmfts", .data = &stmfts4_ops },
+ { .compatible = "st,stmfts5", .data = &stmfts5_ops },
{ },
};
MODULE_DEVICE_TABLE(of, stmfts_of_match);
@@ -847,5 +1284,7 @@ static struct i2c_driver stmfts_driver = {
module_i2c_driver(stmfts_driver);
MODULE_AUTHOR("Andi Shyti <andi.shyti@samsung.com>");
+MODULE_AUTHOR("David Heidelberg <david@ixit.cz>");
+MODULE_AUTHOR("Petr Hodina <petr.hodina@protonmail.com>");
MODULE_DESCRIPTION("STMicroelectronics FTS Touch Screen");
MODULE_LICENSE("GPL");
--
2.53.0© 2016 - 2026 Red Hat, Inc.