input/keyboard/max7359_keypad.c

61 	struct i2c_client *client;
64 static int max7359_write_reg(struct i2c_client *client, u8 reg, u8 val)
66 	int ret = i2c_smbus_write_byte_data(client, reg, val);
69 		dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
74 static int max7359_read_reg(struct i2c_client *client, int reg)
76 	int ret = i2c_smbus_read_byte_data(client, reg);
79 		dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
91 	val = max7359_read_reg(keypad->client, MAX7359_REG_KEYFIFO);
98 	dev_dbg(&keypad->client->dev,
113 static inline void max7359_fall_deepsleep(struct i2c_client *client)
115 	max7359_write_reg(client, MAX7359_REG_SLEEP, MAX7359_AUTOSLEEP_8192);
122 static inline void max7359_take_catnap(struct i2c_client *client)
124 	max7359_write_reg(client, MAX7359_REG_SLEEP, MAX7359_AUTOSLEEP_256);
131 	max7359_take_catnap(keypad->client);
140 	max7359_fall_deepsleep(keypad->client);
143 static void max7359_initialize(struct i2c_client *client)
145 	max7359_write_reg(client, MAX7359_REG_CONFIG,
150 	max7359_write_reg(client, MAX7359_REG_DEBOUNCE, 0x1F);
153 	max7359_write_reg(client, MAX7359_REG_INTERRUPT, 0x01);
155 	max7359_fall_deepsleep(client);
158 static int max7359_probe(struct i2c_client *client)
161 			dev_get_platdata(&client->dev);
167 	if (!client->irq) {
168 		dev_err(&client->dev, "The irq number should not be zero\n");
173 	ret = max7359_read_reg(client, MAX7359_REG_KEYFIFO);
175 		dev_err(&client->dev, "failed to detect device\n");
179 	dev_dbg(&client->dev, "keys FIFO is 0x%02x\n", ret);
181 	keypad = devm_kzalloc(&client->dev, sizeof(struct max7359_keypad),
184 		dev_err(&client->dev, "failed to allocate memory\n");
188 	input_dev = devm_input_allocate_device(&client->dev);
190 		dev_err(&client->dev, "failed to allocate input device\n");
194 	keypad->client = client;
197 	input_dev->name = client->name;
201 	input_dev->dev.parent = &client->dev;
217 		dev_err(&client->dev, "failed to build keymap\n");
221 	error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
224 					  client->name, keypad);
226 		dev_err(&client->dev, "failed to register interrupt\n");
233 		dev_err(&client->dev, "failed to register input device\n");
238 	max7359_initialize(client);
240 	device_init_wakeup(&client->dev, 1);
247 	struct i2c_client *client = to_i2c_client(dev);
249 	max7359_fall_deepsleep(client);
251 	if (device_may_wakeup(&client->dev))
252 		enable_irq_wake(client->irq);
259 	struct i2c_client *client = to_i2c_client(dev);
261 	if (device_may_wakeup(&client->dev))
262 		disable_irq_wake(client->irq);
265 	max7359_take_catnap(client);