Let's switch to using devm_*() interfaces to manage our resources, thus will
simplify error unwinding a bit.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/keyboard/tca8418_keypad.c | 123 +++++++++++++-------------------
1 file changed, 50 insertions(+), 73 deletions(-)
diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c
index 65cf5fa..adfd8c5 100644
--- a/drivers/input/keyboard/tca8418_keypad.c
+++ b/drivers/input/keyboard/tca8418_keypad.c
@@ -110,30 +110,11 @@
#define KEY_EVENT_CODE 0x7f
#define KEY_EVENT_VALUE 0x80
-
-static const struct i2c_device_id tca8418_id[] = {
- { TCA8418_NAME, 8418, },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, tca8418_id);
-
-#ifdef CONFIG_OF
-static const struct of_device_id tca8418_dt_ids[] __devinitconst = {
- { .compatible = "ti,tca8418", },
- { }
-};
-MODULE_DEVICE_TABLE(of, tca8418_dt_ids);
-#endif
-
struct tca8418_keypad {
- unsigned int irq;
- unsigned int row_shift;
-
struct i2c_client *client;
struct input_dev *input;
- /* Flexible array member, must be at end of struct */
- unsigned short keymap[];
+ unsigned int row_shift;
};
/*
@@ -178,6 +159,8 @@ static int tca8418_read_byte(struct tca8418_keypad *keypad_data,
static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
{
+ struct input_dev *input = keypad_data->input;
+ unsigned short *keymap = input->keycode;
int error, col, row;
u8 reg, state, code;
@@ -196,9 +179,8 @@ static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
col = (col) ? col - 1 : TCA8418_MAX_COLS - 1;
code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift);
- input_event(keypad_data->input, EV_MSC, MSC_SCAN, code);
- input_report_key(keypad_data->input,
- keypad_data->keymap[code], state);
+ input_event(input, EV_MSC, MSC_SCAN, code);
+ input_report_key(input, keymap[code], state);
/* Read for next loop */
error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, ®);
@@ -208,7 +190,7 @@ static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
dev_err(&keypad_data->client->dev,
"unable to read REG_KEY_EVENT_A\n");
- input_sync(keypad_data->input);
+ input_sync(input);
}
/*
@@ -281,20 +263,22 @@ static int __devinit tca8418_configure(struct tca8418_keypad *keypad_data,
static int __devinit tca8418_keypad_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct device *dev = &client->dev;
const struct tca8418_keypad_platform_data *pdata =
- client->dev.platform_data;
+ dev_get_platdata(dev);
struct tca8418_keypad *keypad_data;
struct input_dev *input;
const struct matrix_keymap_data *keymap_data = NULL;
u32 rows = 0, cols = 0;
bool rep = false;
bool irq_is_gpio = false;
+ int irq;
int error, row_shift, max_keys;
/* Copy the platform data */
if (pdata) {
if (!pdata->keymap_data) {
- dev_err(&client->dev, "no keymap data defined\n");
+ dev_err(dev, "no keymap data defined\n");
return -EINVAL;
}
keymap_data = pdata->keymap_data;
@@ -303,25 +287,25 @@ static int __devinit tca8418_keypad_probe(struct i2c_client *client,
rep = pdata->rep;
irq_is_gpio = pdata->irq_is_gpio;
} else {
- struct device_node *np = client->dev.of_node;
+ struct device_node *np = dev->of_node;
of_property_read_u32(np, "keypad,num-rows", &rows);
of_property_read_u32(np, "keypad,num-columns", &cols);
rep = of_property_read_bool(np, "keypad,autorepeat");
}
if (!rows || rows > TCA8418_MAX_ROWS) {
- dev_err(&client->dev, "invalid rows\n");
+ dev_err(dev, "invalid rows\n");
return -EINVAL;
}
if (!cols || cols > TCA8418_MAX_COLS) {
- dev_err(&client->dev, "invalid columns\n");
+ dev_err(dev, "invalid columns\n");
return -EINVAL;
}
/* Check i2c driver capabilities */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) {
- dev_err(&client->dev, "%s adapter not supported\n",
+ dev_err(dev, "%s adapter not supported\n",
dev_driver_string(&client->adapter->dev));
return -ENODEV;
}
@@ -329,9 +313,8 @@ static int __devinit tca8418_keypad_probe(struct i2c_client *client,
row_shift = get_count_order(cols);
max_keys = rows << row_shift;
- /* Allocate memory for keypad_data, keymap and input device */
- keypad_data = kzalloc(sizeof(*keypad_data) +
- max_keys * sizeof(keypad_data->keymap[0]), GFP_KERNEL);
+ /* Allocate memory for keypad_data and input device */
+ keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL);
if (!keypad_data)
return -ENOMEM;
@@ -341,29 +324,26 @@ static int __devinit tca8418_keypad_probe(struct i2c_client *client,
/* Initialize the chip or fail if chip isn't present */
error = tca8418_configure(keypad_data, rows, cols);
if (error < 0)
- goto fail1;
+ return error;
/* Configure input device */
- input = input_allocate_device();
- if (!input) {
- error = -ENOMEM;
- goto fail1;
- }
+ input = devm_input_allocate_device(dev);
+ if (!input)
+ return -ENOMEM;
+
keypad_data->input = input;
input->name = client->name;
- input->dev.parent = &client->dev;
-
input->id.bustype = BUS_I2C;
input->id.vendor = 0x0001;
input->id.product = 0x001;
input->id.version = 0x0001;
error = matrix_keypad_build_keymap(keymap_data, NULL, rows, cols,
- keypad_data->keymap, input);
+ NULL, input);
if (error) {
- dev_dbg(&client->dev, "Failed to build keymap\n");
- goto fail2;
+ dev_err(dev, "Failed to build keymap\n");
+ return error;
}
if (rep)
@@ -372,53 +352,50 @@ static int __devinit tca8418_keypad_probe(struct i2c_client *client,
input_set_drvdata(input, keypad_data);
+ irq = client->irq;
if (irq_is_gpio)
- client->irq = gpio_to_irq(client->irq);
+ irq = gpio_to_irq(irq);
- error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler,
- IRQF_TRIGGER_FALLING |
- IRQF_SHARED |
- IRQF_ONESHOT,
- client->name, keypad_data);
+ error = devm_request_threaded_irq(dev, irq, NULL, tca8418_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_SHARED |
+ IRQF_ONESHOT,
+ client->name, keypad_data);
if (error) {
- dev_dbg(&client->dev,
- "Unable to claim irq %d; error %d\n",
+ dev_err(dev, "Unable to claim irq %d; error %d\n",
client->irq, error);
- goto fail2;
+ return error;
}
error = input_register_device(input);
if (error) {
- dev_dbg(&client->dev,
- "Unable to register input device, error: %d\n", error);
- goto fail3;
+ dev_err(dev, "Unable to register input device, error: %d\n",
+ error);
+ return error;
}
- i2c_set_clientdata(client, keypad_data);
return 0;
-
-fail3:
- free_irq(client->irq, keypad_data);
-fail2:
- input_free_device(input);
-fail1:
- kfree(keypad_data);
- return error;
}
static int __devexit tca8418_keypad_remove(struct i2c_client *client)
{
- struct tca8418_keypad *keypad_data = i2c_get_clientdata(client);
-
- free_irq(keypad_data->client->irq, keypad_data);
-
- input_unregister_device(keypad_data->input);
-
- kfree(keypad_data);
-
return 0;
}
+static const struct i2c_device_id tca8418_id[] = {
+ { TCA8418_NAME, 8418, },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tca8418_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id tca8418_dt_ids[] __devinitconst = {
+ { .compatible = "ti,tca8418", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tca8418_dt_ids);
+#endif
+
static struct i2c_driver tca8418_keypad_driver = {
.driver = {
.name = TCA8418_NAME,
--
1.7.11.7
--
Dmitry
--
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