* [RFC PATCH 2/2] Input: add support for the STM FTS2BA61Y touchscreen
2025-09-11 21:19 [RFC PATCH 0/2] Input: add fts2ba61y touchscreen driver Eric Gonçalves
2025-09-11 21:19 ` [RFC PATCH 1/2] dt-bindings: input: add ST-Microelectronics FTS2BA61Y touchscreen binding Eric Gonçalves
@ 2025-09-11 21:19 ` Eric Gonçalves
2025-09-14 14:47 ` [RFC PATCH 0/2] Input: add fts2ba61y touchscreen driver Krzysztof Kozlowski
2 siblings, 0 replies; 8+ messages in thread
From: Eric Gonçalves @ 2025-09-11 21:19 UTC (permalink / raw)
To: Dmitry Torokhov, Henrik Rydberg, Rob Herring, Krzysztof Kozlowski,
Conor Dooley
Cc: Ivaylo Ivanov, linux-input, devicetree, linux-kernel,
Eric Gonçalves
The ST-Microelectronics FTS2BA61Y touchscreen is a capacitive multi-touch
controller connected through SPI at 0x0, the touchscreen is typically
used in mobile devices (like the Galaxy S22 series)
Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Signed-off-by: Eric Gonçalves <ghatto404@gmail.com>
---
Ivaylo Ivanov originally wrote the FTS2BA61Y driver, I am upstreaming it
on his behalf.
---
drivers/input/touchscreen/Kconfig | 11 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/fts2ba61y.c | 588 ++++++++++++++++++++++++++
3 files changed, 600 insertions(+)
create mode 100644 drivers/input/touchscreen/fts2ba61y.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 196905162945..1e199191f527 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -370,6 +370,17 @@ config TOUCHSCREEN_EXC3000
To compile this driver as a module, choose M here: the
module will be called exc3000.
+config TOUCHSCREEN_FTS2BA61Y
+ tristate "ST-Microelectronics FTS2BA61Y touchscreen"
+ depends on SPI
+ help
+ Say Y here if you have the ST-Microelectronics FTS2BA61Y touchscreen
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called fts2ba61y.
+
config TOUCHSCREEN_FUJITSU
tristate "Fujitsu serial touchscreen"
select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 97a025c6a377..408a9fd5bd35 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o
obj-$(CONFIG_TOUCHSCREEN_EGALAX_SERIAL) += egalax_ts_serial.o
obj-$(CONFIG_TOUCHSCREEN_EXC3000) += exc3000.o
+obj-$(CONFIG_TOUCHSCREEN_FTS2BA61Y) += fts2ba61y.o
obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix_ts.o
obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_CORE) += goodix_berlin_core.o
diff --git a/drivers/input/touchscreen/fts2ba61y.c b/drivers/input/touchscreen/fts2ba61y.c
new file mode 100644
index 000000000000..b3b3abca5404
--- /dev/null
+++ b/drivers/input/touchscreen/fts2ba61y.c
@@ -0,0 +1,588 @@
+// SPDX-License-Identifier: GPL-2.0
+// Based loosely on s6sy761.c
+
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/input/mt.h>
+#include <linux/spi/spi.h>
+#include <linux/input/touchscreen.h>
+#include <linux/unaligned.h>
+#include <linux/regulator/consumer.h>
+
+/* commands */
+#define FTS2BA61Y_CMD_SENSE_ON 0x10
+#define FTS2BA61Y_CMD_SENSE_OFF 0x11
+#define FTS2BA61Y_CMD_READ_PANEL_INFO 0x23
+#define FTS2BA61Y_CMD_READ_FW_VER 0x24
+#define FTS2BA61Y_CMD_TOUCHTYPE 0x30 /* R/W for get/set */
+#define FTS2BA61Y_CMD_CLEAR_EVENTS 0x62
+#define FTS2BA61Y_CMD_READ_EVENT 0x87
+#define FTS2BA61Y_CMD_CUSTOM_W 0xC0
+#define FTS2BA61Y_CMD_CUSTOM_R 0xD1
+#define FTS2BA61Y_CMD_REG_W 0xFA
+#define FTS2BA61Y_CMD_REG_R 0xFB
+
+/* touch type masks */
+#define FTS2BA61Y_MASK_TOUCH BIT(0)
+#define FTS2BA61Y_MASK_HOVER BIT(1)
+#define FTS2BA61Y_MASK_COVER BIT(2)
+#define FTS2BA61Y_MASK_GLOVE BIT(3)
+#define FTS2BA61Y_MASK_STYLUS BIT(4)
+#define FTS2BA61Y_MASK_PALM BIT(5)
+#define FTS2BA61Y_MASK_WET BIT(6)
+#define FTS2BA61Y_TOUCHTYPE_DEFAULT (FTS2BA61Y_MASK_TOUCH | \
+ FTS2BA61Y_MASK_PALM | \
+ FTS2BA61Y_MASK_WET)
+
+/* event status masks */
+#define FTS2BA61Y_MASK_STYPE GENMASK(5, 2)
+#define FTS2BA61Y_MASK_EVENT_ID GENMASK(1, 0)
+
+/* event coordinate masks */
+#define FTS2BA61Y_MASK_TCHSTA GENMASK(7, 6)
+#define FTS2BA61Y_MASK_TID GENMASK(5, 2)
+#define FTS2BA61Y_MASK_X_3_0 GENMASK(7, 4)
+#define FTS2BA61Y_MASK_Y_3_0 GENMASK(3, 0)
+#define FTS2BA61Y_MASK_Z GENMASK(5, 0)
+#define FTS2BA61Y_MASK_TTYPE_3_2 GENMASK(7, 6)
+#define FTS2BA61Y_MASK_TTYPE_1_0 GENMASK(1, 0)
+#define FTS2BA61Y_MASK_LEFT_EVENTS GENMASK(4, 0)
+
+/* event error status */
+#define FTS2BA61Y_EVENT_STATUSTYPE_INFO 0x2
+
+/* information report */
+#define FTS2BA61Y_INFO_READY_STATUS 0x0
+
+/* event status */
+#define FTS2BA61Y_COORDINATE_EVENT 0x0
+
+/* touch types */
+#define FTS2BA61Y_TOUCHTYPE_NORMAL 0x0
+#define FTS2BA61Y_TOUCHTYPE_HOVER 0x1
+#define FTS2BA61Y_TOUCHTYPE_FLIPCOVER 0x2
+#define FTS2BA61Y_TOUCHTYPE_GLOVE 0x3
+#define FTS2BA61Y_TOUCHTYPE_STYLUS 0x4
+#define FTS2BA61Y_TOUCHTYPE_PALM 0x5
+#define FTS2BA61Y_TOUCHTYPE_WET 0x6
+#define FTS2BA61Y_TOUCHTYPE_PROXIMITY 0x7
+#define FTS2BA61Y_TOUCHTYPE_JIG 0x8
+
+#define FTS2BA61Y_COORDINATE_ACTION_NONE 0x0
+#define FTS2BA61Y_COORDINATE_ACTION_PRESS 0x1
+#define FTS2BA61Y_COORDINATE_ACTION_MOVE 0x2
+#define FTS2BA61Y_COORDINATE_ACTION_RELEASE 0x3
+
+#define FTS2BA61Y_DEV_NAME "fts2ba61y"
+#define FTS2BA61Y_EVENT_BUFF_SIZE 16
+#define FTS2BA61Y_PANEL_INFO_SIZE 11
+#define FTS2BA61Y_RESET_CMD_SIZE 5
+#define FTS2BA61Y_EVENT_COUNT 31
+#define MAX_TRANSFER_SIZE 256
+
+enum fts2ba61y_regulators {
+ FTS2BA61Y_REGULATOR_VDD,
+ FTS2BA61Y_REGULATOR_AVDD,
+};
+
+struct fts2ba61y_data {
+ struct spi_device *spi;
+ struct regulator_bulk_data regulators[2];
+ struct input_dev *input_dev;
+ struct mutex mutex;
+ struct touchscreen_properties prop;
+
+ u8 tx_count;
+
+ unsigned int max_x;
+ unsigned int max_y;
+};
+
+static int fts2ba61y_write(struct fts2ba61y_data *ts,
+ u8 *reg, int cmd_len, u8 *data, int data_len)
+{
+ struct spi_message msg;
+ struct spi_transfer xfers;
+ char *tx_buf;
+ int len;
+ int ret;
+
+ tx_buf = kzalloc(cmd_len + data_len + 1, GFP_KERNEL);
+ if (!tx_buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ memset(&xfers, 0, sizeof(xfers));
+ spi_message_init(&msg);
+
+ memcpy(&tx_buf[0], reg, cmd_len);
+ if (data_len && data)
+ memcpy(&tx_buf[cmd_len], data, data_len);
+
+ len = cmd_len + data_len;
+
+ /* custom write cmd */
+ if (reg[0] != FTS2BA61Y_CMD_REG_W &&
+ reg[0] != FTS2BA61Y_CMD_REG_R) {
+ memmove(tx_buf + 1, tx_buf, len);
+ tx_buf[0] = FTS2BA61Y_CMD_CUSTOM_W;
+ len++;
+ }
+
+ xfers.len = len;
+ xfers.tx_buf = tx_buf;
+
+ spi_message_add_tail(&xfers, &msg);
+
+ mutex_lock(&ts->mutex);
+ ret = spi_sync(ts->spi, &msg);
+ if (ret)
+ dev_err(&ts->spi->dev, "spi transfer error, %d", ret);
+ mutex_unlock(&ts->mutex);
+
+out:
+ kfree(tx_buf);
+ return ret;
+}
+
+static int fts2ba61y_spi_raw_read(struct fts2ba61y_data *ts,
+ u8 *tx_buf, u8 *rx_buf, int len)
+{
+ struct spi_message msg;
+ struct spi_transfer xfer;
+ int ret;
+
+ memset(&xfer, 0, sizeof(xfer));
+ spi_message_init(&msg);
+
+ xfer.len = len;
+ xfer.tx_buf = tx_buf;
+ xfer.rx_buf = rx_buf;
+ spi_message_add_tail(&xfer, &msg);
+
+ mutex_lock(&ts->mutex);
+ ret = spi_sync(ts->spi, &msg);
+ if (ret)
+ dev_err(&ts->spi->dev, "spi transfer error, %d", ret);
+ mutex_unlock(&ts->mutex);
+
+ return ret;
+}
+
+/*
+ * higher-level wrapper that prepares the buffers for a read.
+ */
+static int fts2ba61y_read(struct fts2ba61y_data *ts,
+ u8 reg[], int tx_len, u8 buf[], int rx_len)
+{
+ char *tx_buf, *rx_buf;
+ int ret, mem_len;
+ u16 reg_val;
+
+ if (tx_len > 3)
+ mem_len = rx_len + 1 + tx_len;
+ else
+ mem_len = rx_len + 4;
+
+ tx_buf = kzalloc(mem_len, GFP_KERNEL);
+ rx_buf = kzalloc(mem_len, GFP_KERNEL);
+ if (!tx_buf || !rx_buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ switch (reg[0]) {
+ case FTS2BA61Y_CMD_READ_EVENT:
+ case FTS2BA61Y_CMD_REG_W:
+ case FTS2BA61Y_CMD_REG_R:
+ memcpy(tx_buf, reg, tx_len);
+ break;
+
+ default:
+ tx_buf[0] = FTS2BA61Y_CMD_CUSTOM_R;
+
+ if (tx_len == 1)
+ reg_val = 0;
+ else if (tx_len == 2)
+ reg_val = reg[0];
+ else if (tx_len == 3)
+ reg_val = reg[0] | (reg[1] << 8);
+ else {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ tx_len = 3;
+ put_unaligned_be16(reg_val, &tx_buf[1]);
+
+ ret = fts2ba61y_write(ts, reg, 1, NULL, 0);
+ if (ret < 0)
+ goto out;
+ break;
+ }
+
+ ret = fts2ba61y_spi_raw_read(ts, tx_buf, rx_buf, rx_len + 1 + tx_len);
+ if (ret < 0)
+ goto out;
+
+ memcpy(buf, &rx_buf[1 + tx_len], rx_len);
+
+out:
+ kfree(tx_buf);
+ kfree(rx_buf);
+ return ret;
+}
+
+static int fts2ba61y_wait_for_ready(struct fts2ba61y_data *ts)
+{
+ u8 buffer[FTS2BA61Y_EVENT_BUFF_SIZE];
+ u8 cmd = FTS2BA61Y_CMD_READ_EVENT;
+ u8 status_id, stype;
+ int ret;
+
+ for (int retries = 5; retries > 0; retries--) {
+ ret = fts2ba61y_read(ts, &cmd, 1, buffer, FTS2BA61Y_EVENT_BUFF_SIZE);
+
+ stype = FIELD_GET(FTS2BA61Y_MASK_STYPE, buffer[0]);
+ status_id = buffer[1];
+
+ if (stype == FTS2BA61Y_EVENT_STATUSTYPE_INFO &&
+ status_id == FTS2BA61Y_INFO_READY_STATUS) {
+ ret = 0;
+ break;
+ } else
+ ret = -ENODEV;
+
+ msleep(20);
+ }
+
+ return ret;
+}
+
+static int fts2ba61y_reset(struct fts2ba61y_data *ts)
+{
+ u8 cmd = FTS2BA61Y_CMD_REG_W;
+ /* the following sequence is undocumented */
+ u8 reset[FTS2BA61Y_RESET_CMD_SIZE] = { 0x20, 0x00,
+ 0x00, 0x24, 0x81 };
+ int ret;
+
+ disable_irq(ts->spi->irq);
+
+ ret = fts2ba61y_write(ts, &cmd, 1, &reset[0], FTS2BA61Y_RESET_CMD_SIZE);
+ if (ret)
+ return ret;
+ msleep(30);
+
+ ret = fts2ba61y_wait_for_ready(ts);
+ if (ret)
+ return ret;
+
+ enable_irq(ts->spi->irq);
+
+ return 0;
+}
+
+static int fts2ba61y_set_channels(struct fts2ba61y_data *ts)
+{
+ int ret;
+ u8 cmd = FTS2BA61Y_CMD_READ_PANEL_INFO;
+ u8 data[FTS2BA61Y_PANEL_INFO_SIZE];
+
+ ret = fts2ba61y_read(ts, &cmd, 1, data, FTS2BA61Y_PANEL_INFO_SIZE);
+ if (ret)
+ return ret;
+
+ ts->max_x = get_unaligned_be16(data);
+ ts->max_y = get_unaligned_be16(data + 2);
+
+ /* if no tx channels defined, at least keep one */
+ ts->tx_count = max_t(u8, data[8], 1);
+
+ return 0;
+}
+
+static int fts2ba61y_set_touch_func(struct fts2ba61y_data *ts)
+{
+ u8 cmd = FTS2BA61Y_CMD_TOUCHTYPE;
+ u16 touchtype = cpu_to_le16(FTS2BA61Y_TOUCHTYPE_DEFAULT);
+
+ return fts2ba61y_write(ts, &cmd, 1, (u8 *)&touchtype, 2);
+}
+
+static int fts2ba61y_hw_init(struct fts2ba61y_data *ts)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ts->regulators),
+ ts->regulators);
+ if (ret)
+ return ret;
+
+ msleep(140);
+
+ ret = fts2ba61y_reset(ts);
+ if (ret)
+ return ret;
+
+ ret = fts2ba61y_set_channels(ts);
+ if (ret)
+ return ret;
+
+ return fts2ba61y_set_touch_func(ts);
+}
+
+static int fts2ba61y_get_event(struct fts2ba61y_data *ts, u8 *data, int *n_events)
+{
+ int ret;
+ u8 cmd = FTS2BA61Y_CMD_READ_EVENT;
+
+ ret = fts2ba61y_read(ts, &cmd, 1, data, FTS2BA61Y_EVENT_BUFF_SIZE);
+ if (ret < 0)
+ return ret;
+
+ if (!data[0]) {
+ *n_events = 0;
+ return 0;
+ }
+
+ *n_events = FIELD_GET(FTS2BA61Y_MASK_LEFT_EVENTS, data[7]);
+ if (unlikely(*n_events >= FTS2BA61Y_EVENT_COUNT)) {
+ cmd = FTS2BA61Y_CMD_CLEAR_EVENTS;
+ fts2ba61y_write(ts, &cmd, 1, NULL, 0);
+ *n_events = 0;
+ return -EINVAL;
+ }
+
+ if (*n_events > 0) {
+ ret = fts2ba61y_read(ts, &cmd, 1,
+ &data[1 * FTS2BA61Y_EVENT_BUFF_SIZE],
+ FTS2BA61Y_EVENT_BUFF_SIZE * (*n_events));
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void fts2ba61y_report_coordinates(struct fts2ba61y_data *ts,
+ u8 *event, u8 tid)
+{
+ u8 major = event[4];
+ u8 minor = event[5];
+ u8 z = FIELD_GET(FTS2BA61Y_MASK_Z, event[6]);
+
+ u16 x = (event[1] << 4) |
+ FIELD_GET(FTS2BA61Y_MASK_X_3_0, event[3]);
+ u16 y = (event[2] << 4) |
+ FIELD_GET(FTS2BA61Y_MASK_Y_3_0, event[3]);
+ u16 ttype = (FIELD_GET(FTS2BA61Y_MASK_TTYPE_3_2, event[6]) << 2) |
+ (FIELD_GET(FTS2BA61Y_MASK_TTYPE_1_0, event[7]) << 0);
+
+ if (ttype != FTS2BA61Y_TOUCHTYPE_NORMAL &&
+ ttype != FTS2BA61Y_TOUCHTYPE_PALM &&
+ ttype != FTS2BA61Y_TOUCHTYPE_WET &&
+ ttype != FTS2BA61Y_TOUCHTYPE_GLOVE)
+ return;
+
+ input_mt_slot(ts->input_dev, tid);
+ input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, major);
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MINOR, minor);
+ input_report_abs(ts->input_dev, ABS_MT_PRESSURE, z);
+
+ input_mt_sync_frame(ts->input_dev);
+ input_sync(ts->input_dev);
+}
+
+static void fts2ba61y_report_release(struct fts2ba61y_data *ts, u8 tid)
+{
+ input_mt_slot(ts->input_dev, tid);
+ input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, false);
+
+ input_mt_sync_frame(ts->input_dev);
+ input_sync(ts->input_dev);
+}
+
+static void fts2ba61y_handle_coordinates(struct fts2ba61y_data *ts, u8 *event)
+{
+ u8 t_id = FIELD_GET(FTS2BA61Y_MASK_TID, event[0]);
+ u8 action = FIELD_GET(FTS2BA61Y_MASK_TCHSTA, event[0]);
+
+ if (t_id > ts->tx_count)
+ return;
+
+ switch (action) {
+ case FTS2BA61Y_COORDINATE_ACTION_PRESS:
+ case FTS2BA61Y_COORDINATE_ACTION_MOVE:
+ fts2ba61y_report_coordinates(ts, event, t_id);
+ break;
+
+ case FTS2BA61Y_COORDINATE_ACTION_RELEASE:
+ fts2ba61y_report_release(ts, t_id);
+ break;
+ }
+}
+
+static irqreturn_t fts2ba61y_irq_handler(int irq, void *handle)
+{
+ struct fts2ba61y_data *ts = handle;
+ u8 buffer[FTS2BA61Y_EVENT_COUNT * FTS2BA61Y_EVENT_BUFF_SIZE];
+ u8 *event;
+ u8 event_id;
+ int n_events = 0;
+ int ret;
+
+ usleep(1);
+
+ ret = fts2ba61y_get_event(ts, buffer, &n_events);
+ if (ret < 0) {
+ dev_dbg(&ts->spi->dev, "failed to get event: %d", ret);
+ return IRQ_HANDLED;
+ }
+
+ for (int i = 0; i <= n_events; i++) {
+ event = &buffer[i * FTS2BA61Y_EVENT_BUFF_SIZE];
+ event_id = FIELD_GET(FTS2BA61Y_MASK_EVENT_ID, event[0]);
+
+ if (event_id == FTS2BA61Y_COORDINATE_EVENT)
+ fts2ba61y_handle_coordinates(ts, event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int fts2ba61y_input_open(struct input_dev *dev)
+{
+ struct fts2ba61y_data *ts = input_get_drvdata(dev);
+ u8 cmd = FTS2BA61Y_CMD_SENSE_ON;
+
+ return fts2ba61y_write(ts, &cmd, 1, NULL, 0);
+}
+
+static void fts2ba61y_input_close(struct input_dev *dev)
+{
+ struct fts2ba61y_data *ts = input_get_drvdata(dev);
+ int ret;
+ u8 cmd = FTS2BA61Y_CMD_SENSE_OFF;
+
+ ret = fts2ba61y_write(ts, &cmd, 1, NULL, 0);
+ if (ret)
+ dev_err(&ts->spi->dev, "failed to turn off sensing\n");
+}
+
+static void fts2ba61y_power_off(void *data)
+{
+ struct fts2ba61y_data *ts = data;
+
+ disable_irq(ts->spi->irq);
+ regulator_bulk_disable(ARRAY_SIZE(ts->regulators),
+ ts->regulators);
+}
+
+static int fts2ba61y_probe(struct spi_device *spi) {
+ struct fts2ba61y_data *ts;
+ struct input_dev *input_dev;
+ int error;
+
+ ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ ts->spi = spi;
+ mutex_init(&ts->mutex);
+
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 8;
+
+ error = spi_setup(spi);
+ if (error)
+ return error;
+
+ ts->regulators[FTS2BA61Y_REGULATOR_VDD].supply = "vdd";
+ ts->regulators[FTS2BA61Y_REGULATOR_AVDD].supply = "avdd";
+ error = devm_regulator_bulk_get(&spi->dev,
+ ARRAY_SIZE(ts->regulators),
+ ts->regulators);
+ if (error)
+ return error;
+
+ error = fts2ba61y_hw_init(ts);
+ if (error)
+ return error;
+
+ error = devm_add_action_or_reset(&ts->spi->dev, fts2ba61y_power_off, ts);
+ if (error)
+ return error;
+
+ input_dev = devm_input_allocate_device(&spi->dev);
+ if (!input_dev)
+ return -ENOMEM;
+
+ ts->input_dev = input_dev;
+
+ input_dev->name = FTS2BA61Y_DEV_NAME;
+ input_dev->id.bustype = BUS_SPI;
+ input_dev->open = fts2ba61y_input_open;
+ input_dev->close = fts2ba61y_input_close;
+
+ input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
+ input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+ touchscreen_parse_properties(input_dev, true, &ts->prop);
+
+ spi_set_drvdata(spi, ts);
+ input_set_drvdata(input_dev, ts);
+
+ error = input_mt_init_slots(input_dev, ts->tx_count, INPUT_MT_DIRECT);
+ if (error)
+ return error;
+
+ error = input_register_device(input_dev);
+ if (error)
+ return error;
+
+ error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
+ fts2ba61y_irq_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "fts2ba61y_irq", ts);
+ return error;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id spi_touchscreen_dt_ids[] = {
+ { .compatible = "st,fts2ba61y" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, spi_touchscreen_dt_ids);
+#endif
+
+static const struct spi_device_id fts2ba61y_spi_ids[] = {
+ { "fts2ba61y" },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, fts2ba61y_spi_ids);
+
+static struct spi_driver spi_touchscreen_driver = {
+ .driver = {
+ .name = FTS2BA61Y_DEV_NAME,
+ .of_match_table = of_match_ptr(spi_touchscreen_dt_ids),
+ },
+ .probe = fts2ba61y_probe,
+ .id_table = fts2ba61y_spi_ids,
+};
+
+module_spi_driver(spi_touchscreen_driver);
+
+MODULE_AUTHOR("Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>");
+MODULE_DESCRIPTION("ST-Microelectronics FTS2BA61Y Touch Screen");
+MODULE_LICENSE("GPL");
--
2.50.1
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