input: touchscreen: Add sysfs node for control power

This patch add sysfs node for control power.
User layer can control to use this node.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>

diff --git a/drivers/input/touchscreen/fts_ts.c b/drivers/input/touchscreen/fts_ts.c
index 50d2dbc..28ddc33 100644 (file)
--- a/drivers/input/touchscreen/fts_ts.c
+++ b/drivers/input/touchscreen/fts_ts.c
@@ -450,6 +450,50 @@ static void fts_input_close(struct input_dev *dev)
 }
 #endif
 
+static int fts_pm_suspend(struct device *dev);
+static int fts_pm_resume(struct device *dev);
+
+static ssize_t show_enabled(struct device *dev, struct device_attribute *attr,
+               char *buf)
+{
+       struct fts_ts_info *info = dev_get_drvdata(dev);
+
+       return sprintf(buf, "%d\n", info->enabled);
+}
+
+static ssize_t store_enabled(struct device *dev, struct device_attribute *attr,
+               const char *buf, size_t size)
+{
+       struct fts_ts_info *info = dev_get_drvdata(dev);
+       int enabled;
+       int ret;
+
+       ret = sscanf(buf, "%d", &enabled);
+       if (ret == 0)
+               return -EINVAL;
+
+       if (enabled == info->enabled)
+               return 0;
+
+       if (enabled)
+               fts_pm_resume(&info->client->dev);
+       else
+               fts_pm_suspend(&info->client->dev);
+
+       return size;
+}
+
+static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled);
+
+static struct attribute *fts_ts_attributes[] = {
+       &dev_attr_enabled.attr,
+       NULL,
+};
+
+static struct attribute_group fts_ts_attr_group = {
+       .attrs = fts_ts_attributes,
+};
+
 static struct fts_i2c_platform_data *fts_parse_dt(struct device *dev)
 {
        struct fts_i2c_platform_data *pdata;
@@ -477,6 +521,7 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
        struct fts_i2c_platform_data *pdata;
        struct fts_ts_info *info;
+       struct input_dev *input_dev;
        static char fts_ts_phys[64] = { 0 };
        int retval;
        int i = 0;
@@ -525,41 +570,37 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
        }
 
        info->dev = &info->client->dev;
-       info->input_dev = devm_input_allocate_device(&client->dev);
-       if (!info->input_dev)
+       input_dev = devm_input_allocate_device(&client->dev);
+       if (!input_dev)
                return -ENOMEM;
 
-       info->input_dev->dev.parent = &client->dev;
-       info->input_dev->name = "sec_touchscreen";
+       info->input_dev = input_dev;
+       input_dev->dev.parent = &client->dev;
+       input_dev->name = "sec_touchscreen";
        snprintf(fts_ts_phys, sizeof(fts_ts_phys), "%s/input0",
-                info->input_dev->name);
-       info->input_dev->phys = fts_ts_phys;
-       info->input_dev->id.bustype = BUS_I2C;
+                       input_dev->name);
+       input_dev->phys = fts_ts_phys;
+       input_dev->id.bustype = BUS_I2C;
 #ifdef USE_OPEN_CLOSE
-       info->input_dev->open = fts_input_open;
-       info->input_dev->close = fts_input_close;
+       input_dev->open = fts_input_open;
+       input_dev->close = fts_input_close;
 #endif
-       __set_bit(EV_ABS, info->input_dev->evbit);
-       __set_bit(EV_KEY, info->input_dev->evbit);
-       set_bit(BTN_TOUCH, info->input_dev->keybit);
+       __set_bit(EV_ABS, input_dev->evbit);
+       __set_bit(EV_KEY, input_dev->evbit);
+       set_bit(BTN_TOUCH, input_dev->keybit);
 
-       input_mt_init_slots(info->input_dev, FINGER_MAX, 0);
-       input_set_abs_params(info->input_dev, ABS_MT_POSITION_X,
+       input_mt_init_slots(input_dev, FINGER_MAX, 0);
+       input_set_abs_params(input_dev, ABS_MT_POSITION_X,
                        0, info->board->max_x, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_MT_POSITION_Y,
+       input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
                        0, info->board->max_y, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_X,
-                       0, info->board->max_x, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_Y,
-                       0, info->board->max_y, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_MT_TOUCH_MAJOR,
-                                0, 255, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_MT_TOUCH_MINOR,
-                                0, 255, 0, 0);
-       input_set_abs_params(info->input_dev, ABS_MT_DISTANCE,
-                                0, 255, 0, 0);
-
-       input_set_drvdata(info->input_dev, info);
+       input_set_abs_params(input_dev, ABS_X, 0, info->board->max_x, 0, 0);
+       input_set_abs_params(input_dev, ABS_Y,0, info->board->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_DISTANCE, 0, 255, 0, 0);
+
+       input_set_drvdata(input_dev, info);
        i2c_set_clientdata(client, info);
 
        if (info->board->power)
@@ -583,7 +624,7 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
                goto err_fts_init;
        }
 
-       retval = input_register_device(info->input_dev);
+       retval = input_register_device(input_dev);
        if (retval) {
                dev_err(&client->dev, "FTS input_register_device fail!\n");
                goto err_fts_init;
@@ -594,6 +635,12 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
                info->finger[i].mcount = 0;
        }
 
+       retval = sysfs_create_group(&input_dev->dev.kobj, &fts_ts_attr_group);
+       if (retval) {
+               dev_err(&client->dev, "Failed to create sysfs group\n");
+               return retval;
+       }
+
        return 0;
 
 err_fts_init: