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Commit 16ff7cb1 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: tca8418-keypad - switch to using managed resources 



Let's switch to using devm_*() interfaces to manage our resources,
thus will simplify error unwinding a bit.

Reviewed-by: default avatarAlban Bedel <alban.bedel@avionic-design.de>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 91c5d67f

drivers/input/keyboard/tca8418_keypad.c

+25 −53
Original line number Diff line number Diff line
@@ -111,14 +111,10 @@ 
#define KEY_EVENT_VALUE		0x80



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;

};



/*
@@ -163,6 +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;
@@ -181,9 +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, &reg);
@@ -193,7 +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);

}



/*
@@ -275,6 +272,7 @@ static int tca8418_keypad_probe(struct i2c_client *client, 
	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 */
@@ -315,9 +313,8 @@ static int 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;
@@ -327,29 +324,26 @@ static int 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_err(dev, "Failed to build keymap\n");

		goto fail2;

		return error;

	}



	if (rep)
@@ -358,10 +352,11 @@ static int 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,

	error = devm_request_threaded_irq(dev, irq, NULL, tca8418_irq_handler,

					  IRQF_TRIGGER_FALLING |

						IRQF_SHARED |

						IRQF_ONESHOT,
@@ -369,38 +364,16 @@ static int tca8418_keypad_probe(struct i2c_client *client, 
	if (error) {

		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_err(dev, "Unable to register input device, error: %d\n",

			error);

		goto fail3;

	}



	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 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;

}
@@ -425,7 +398,6 @@ static struct i2c_driver tca8418_keypad_driver = { 
		.of_match_table = of_match_ptr(tca8418_dt_ids),

	},

	.probe		= tca8418_keypad_probe,

	.remove		= tca8418_keypad_remove,

	.id_table	= tca8418_id,

};