sm7125: input: touchscreen: fts5cu56a: Add sysfs to track FOD pressed state

/sys/class/sec/tsp/input/fod_pressed
0 -> not pressed
1 -> pressed

Change-Id: Ifb2f432b1286bfc2a76a7c462326562569942ae5

drivers/input/touchscreen/stm/fts5cu56a/fts_ts.c

@@ -106,6 +106,9 @@ static ssize_t fts_secure_touch_enable_store(struct device *dev,
 static ssize_t fts_secure_touch_show(struct device *dev,
 		struct device_attribute *attr, char *buf);
 
+static ssize_t fts_fod_pressed_show(struct device *dev,
+		struct device_attribute *attr, char *buf);
+
 static struct device_attribute attrs[] = {
 	__ATTR(secure_touch_enable, (0664),
 			fts_secure_touch_enable_show,
@@ -113,6 +116,9 @@ static struct device_attribute attrs[] = {
 	__ATTR(secure_touch, (0444),
 			fts_secure_touch_show,
 			NULL),
+	__ATTR(fod_pressed, (0444),
+			fts_fod_pressed_show,
+			NULL),
 };
 
 static ssize_t fts_secure_touch_enable_show(struct device *dev,
@@ -287,6 +293,14 @@ static void fts_secure_touch_stop(struct fts_ts_info *info, int blocking)
 	mutex_unlock(&info->st_lock);
 }
 
+static ssize_t fts_fod_pressed_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fts_ts_info *info = dev_get_drvdata(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%u\n", info->fod_pressed);
+}
+
 static irqreturn_t fts_filter_interrupt(struct fts_ts_info *info)
 {
 	if (atomic_read(&info->st_enabled)) {
@@ -2110,9 +2124,13 @@ static u8 fts_event_handler_type_b(struct fts_ts_info *info)
 						info->scrub_id = SPONGE_EVENT_TYPE_FOD;
 						input_info(true, &info->client->dev, "%s: FOD %sPRESS\n",
 								__func__, p_gesture_status->gesture_id ? "" : "LONG");
+						info->fod_pressed = true;
+						sysfs_notify(&info->input_dev->dev.kobj, NULL, "fod_pressed");
 					} else if (p_gesture_status->gesture_id == FTS_SPONGE_EVENT_GESTURE_ID_FOD_RELEASE) {
 						info->scrub_id = SPONGE_EVENT_TYPE_FOD_RELEASE;
 						input_info(true, &info->client->dev, "%s: FOD RELEASE\n", __func__);
+						info->fod_pressed = false;
+						sysfs_notify(&info->input_dev->dev.kobj, NULL, "fod_pressed");
 					} else if (p_gesture_status->gesture_id == FTS_SPONGE_EVENT_GESTURE_ID_FOD_OUT) {
 						info->scrub_id = SPONGE_EVENT_TYPE_FOD_OUT;
 						input_info(true, &info->client->dev, "%s: FOD OUT\n", __func__);

drivers/input/touchscreen/stm/fts5cu56a/fts_ts.h

@@ -908,6 +908,7 @@ struct fts_ts_info {
 	int fod_y;
 	int fod_vi_size;
 	u8 *fod_vi_data;
+	int fod_pressed;
 
 #if defined(CONFIG_INPUT_SEC_SECURE_TOUCH)
 	atomic_t st_enabled;