From: Yufeng Shen <mile...@chromium.org>
This is the preparation for supporting the code path when there is
platform data provided and still boot the device into a sane state
with backup NVRAM config.
Make the irqflags default to be IRQF_TRIGGER_FALLING if no platform data is
provided.
Signed-off-by: Yufeng Shen <mile...@chromium.org>
Signed-off-by: Daniel Kurtz <djku...@chromium.org>
Signed-off-by: Nick Dyer <nick.d...@itdev.co.uk>
Acked-by: Benson Leung <ble...@chromium.org>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 54 +++++++++++++++++++++---------
1 file changed, 39 insertions(+), 15 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c
b/drivers/input/touchscreen/atmel_mxt_ts.c
index 037f785..41ec122 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -235,7 +235,7 @@ struct mxt_data {
struct i2c_client *client;
struct input_dev *input_dev;
char phys[64]; /* device physical location */
- const struct mxt_platform_data *pdata;
+ struct mxt_platform_data *pdata;
struct mxt_object *object_table;
struct mxt_info info;
unsigned int irq;
@@ -1729,10 +1729,29 @@ static void mxt_input_close(struct input_dev *dev)
mxt_stop(data);
}
+static int mxt_handle_pdata(struct mxt_data *data)
+{
+ data->pdata = dev_get_platdata(&data->client->dev);
+
+ /* Use provided platform data if present */
+ if (data->pdata)
+ return 0;
+
+ data->pdata = kzalloc(sizeof(*data->pdata), GFP_KERNEL);
+ if (!data->pdata) {
+ dev_err(&data->client->dev, "Failed to allocate pdata\n");
+ return -ENOMEM;
+ }
+
+ /* Set default parameters */
+ data->pdata->irqflags = IRQF_TRIGGER_FALLING;
+
+ return 0;
+}
+
static int mxt_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- const struct mxt_platform_data *pdata = client->dev.platform_data;
struct mxt_data *data;
struct input_dev *input_dev;
int error;
@@ -1740,9 +1759,6 @@ static int mxt_probe(struct i2c_client *client,
unsigned int mt_flags = 0;
int i;
- if (!pdata)
- return -EINVAL;
-
data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
input_dev = input_allocate_device();
if (!data || !input_dev) {
@@ -1764,19 +1780,23 @@ static int mxt_probe(struct i2c_client *client,
data->client = client;
data->input_dev = input_dev;
- data->pdata = pdata;
data->irq = client->irq;
+ i2c_set_clientdata(client, data);
+
+ error = mxt_handle_pdata(data);
+ if (error)
+ goto err_free_mem;
init_completion(&data->bl_completion);
init_completion(&data->reset_completion);
init_completion(&data->crc_completion);
- error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
- pdata->irqflags | IRQF_ONESHOT,
+ error = request_threaded_irq(data->irq, NULL, mxt_interrupt,
+ data->pdata->irqflags | IRQF_ONESHOT,
client->name, data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_free_mem;
+ goto err_free_pdata;
}
disable_irq(client->irq);
@@ -1789,13 +1809,13 @@ static int mxt_probe(struct i2c_client *client,
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
- if (pdata->t19_num_keys) {
+ if (data->pdata->t19_num_keys) {
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
- for (i = 0; i < pdata->t19_num_keys; i++)
- if (pdata->t19_keymap[i] != KEY_RESERVED)
+ for (i = 0; i < data->pdata->t19_num_keys; i++)
+ if (data->pdata->t19_keymap[i] != KEY_RESERVED)
input_set_capability(input_dev, EV_KEY,
- pdata->t19_keymap[i]);
+ data->pdata->t19_keymap[i]);
mt_flags |= INPUT_MT_POINTER;
@@ -1832,7 +1852,6 @@ static int mxt_probe(struct i2c_client *client,
0, 255, 0, 0);
input_set_drvdata(input_dev, data);
- i2c_set_clientdata(client, data);
error = input_register_device(input_dev);
if (error) {
@@ -1872,7 +1891,10 @@ err_unregister_device:
err_free_object:
kfree(data->object_table);
err_free_irq:
- free_irq(client->irq, data);
+ free_irq(data->irq, data);
+err_free_pdata:
+ if (!dev_get_platdata(&data->client->dev))
+ kfree(data->pdata);
err_free_mem:
input_free_device(input_dev);
kfree(data);
@@ -1891,6 +1913,8 @@ static int mxt_remove(struct i2c_client *client)
free_irq(data->irq, data);
input_unregister_device(data->input_dev);
kfree(data->object_table);
+ if (!dev_get_platdata(&data->client->dev))
+ kfree(data->pdata);
kfree(data);
return 0;
--
1.7.10.4
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