count = data->msg_buf[0];
- if (count == 0) {
- /*
- * This condition is caused by the CHG line being configured
- * in Mode 0. It results in unnecessary I2C operations but it
- * is benign.
- */
- dev_dbg(dev, "Interrupt triggered but zero messages\n");
+ /*
+ * This condition may be caused by the CHG line being configured in
+ * Mode 0. It results in unnecessary I2C operations but it is benign.
+ */
+ if (count == 0)
return IRQ_NONE;
- } else if (count > data->max_reportid) {
- dev_err(dev, "T44 count %d exceeded max report id\n", count);
+
+ if (count > data->max_reportid) {
+ dev_warn(dev, "T44 count %d exceeded max report id\n", count);
count = data->max_reportid;
}
struct device *dev = &data->client->dev;
int ret = 0;
- dev_info(dev, "Resetting chip\n");
+ dev_info(dev, "Resetting device\n");
+
+ disable_irq(data->irq);
reinit_completion(&data->reset_completion);
if (ret)
return ret;
+ /* Ignore CHG line for 100ms after reset */
+ msleep(100);
+
+ enable_irq(data->irq);
+
ret = mxt_wait_for_completion(data, &data->reset_completion,
MXT_RESET_TIMEOUT);
if (ret)
if (pdata->t19_num_keys) {
mxt_set_up_as_touchpad(input_dev, data);
mt_flags |= INPUT_MT_POINTER;
+ } else {
+ mt_flags |= INPUT_MT_DIRECT;
}
/* For multi touch */
static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
{
struct mxt_platform_data *pdata;
+ struct device_node *np = client->dev.of_node;
u32 *keymap;
- u32 keycode;
- int proplen, i, ret;
+ int proplen, ret;
- if (!client->dev.of_node)
+ if (!np)
return ERR_PTR(-ENOENT);
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
- if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
- &proplen)) {
+ if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
pdata->t19_num_keys = proplen / sizeof(u32);
keymap = devm_kzalloc(&client->dev,
if (!keymap)
return ERR_PTR(-ENOMEM);
- for (i = 0; i < pdata->t19_num_keys; i++) {
- ret = of_property_read_u32_index(client->dev.of_node,
- "linux,gpio-keymap", i, &keycode);
- if (ret)
- keycode = KEY_RESERVED;
-
- keymap[i] = keycode;
- }
+ ret = of_property_read_u32_array(np, "linux,gpio-keymap",
+ keymap, pdata->t19_num_keys);
+ if (ret)
+ dev_warn(&client->dev,
+ "Couldn't read linux,gpio-keymap: %d\n", ret);
pdata->t19_keymap = keymap;
}