1 // SPDX-License-Identifier: GPL-2.0-only
3  * max7359_keypad.c - MAX7359 Key Switch Controller Driver
10  * Datasheet: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5456
47  * Autosleep register values (ms)
58 	unsigned short keycodes[MAX7359_MAX_KEY_NUM];
69 		dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",  in max7359_write_reg()
79 		dev_err(&client->dev, "%s: reg 0x%x, err %d\n",  in max7359_read_reg()
84 /* runs in an IRQ thread -- can (and will!) sleep */
88 	struct input_dev *input_dev = keypad->input_dev;  in max7359_interrupt()
91 	val = max7359_read_reg(keypad->client, MAX7359_REG_KEYFIFO);  in max7359_interrupt()
98 	dev_dbg(&keypad->client->dev,  in max7359_interrupt()
99 		"key[%d:%d] %s\n", row, col, release ? "release" : "press");  in max7359_interrupt()
102 	input_report_key(input_dev, keypad->keycodes[code], !release);  in max7359_interrupt()
110  * If no keys are pressed, enter sleep mode for 8192 ms. And if any
120  * Autosleep just for 256 ms.
131 	max7359_take_catnap(keypad->client);  in max7359_open()
140 	max7359_fall_deepsleep(keypad->client);  in max7359_close()
147 		MAX7359_CFG_WAKEUP); /* Key press wakeup enable */  in max7359_initialize()
149 	/* Full key-scan functionality */  in max7359_initialize()
161 			dev_get_platdata(&client->dev);  in max7359_probe()
167 	if (!client->irq) {  in max7359_probe()
168 		dev_err(&client->dev, "The irq number should not be zero\n");  in max7359_probe()
169 		return -EINVAL;  in max7359_probe()
175 		dev_err(&client->dev, "failed to detect device\n");  in max7359_probe()
176 		return -ENODEV;  in max7359_probe()
179 	dev_dbg(&client->dev, "keys FIFO is 0x%02x\n", ret);  in max7359_probe()
181 	keypad = devm_kzalloc(&client->dev, sizeof(struct max7359_keypad),  in max7359_probe()
184 		dev_err(&client->dev, "failed to allocate memory\n");  in max7359_probe()
185 		return -ENOMEM;  in max7359_probe()
188 	input_dev = devm_input_allocate_device(&client->dev);  in max7359_probe()
190 		dev_err(&client->dev, "failed to allocate input device\n");  in max7359_probe()
191 		return -ENOMEM;  in max7359_probe()
194 	keypad->client = client;  in max7359_probe()
195 	keypad->input_dev = input_dev;  in max7359_probe()
197 	input_dev->name = client->name;  in max7359_probe()
198 	input_dev->id.bustype = BUS_I2C;  in max7359_probe()
199 	input_dev->open = max7359_open;  in max7359_probe()
200 	input_dev->close = max7359_close;  in max7359_probe()
201 	input_dev->dev.parent = &client->dev;  in max7359_probe()
203 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);  in max7359_probe()
204 	input_dev->keycodesize = sizeof(keypad->keycodes[0]);  in max7359_probe()
205 	input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);  in max7359_probe()
206 	input_dev->keycode = keypad->keycodes;  in max7359_probe()
214 					   keypad->keycodes,  in max7359_probe()
217 		dev_err(&client->dev, "failed to build keymap\n");  in max7359_probe()
221 	error = devm_request_threaded_irq(&client->dev, client->irq, NULL,  in max7359_probe()
224 					  client->name, keypad);  in max7359_probe()
226 		dev_err(&client->dev, "failed to register interrupt\n");  in max7359_probe()
233 		dev_err(&client->dev, "failed to register input device\n");  in max7359_probe()
240 	device_init_wakeup(&client->dev, 1);  in max7359_probe()
251 	if (device_may_wakeup(&client->dev))  in max7359_suspend()
252 		enable_irq_wake(client->irq);  in max7359_suspend()
261 	if (device_may_wakeup(&client->dev))  in max7359_resume()
262 		disable_irq_wake(client->irq);  in max7359_resume()