1 // SPDX-License-Identifier: GPL-2.0-only
49 /* Threshold of touch/release trigger */
52 /* Masks for touch and release triggers */
54 /* MPR121 has 12 keys */
88 	struct input_dev *input = mpr121->input_dev;  in mpr_touchkey_report()
89 	struct i2c_client *client = mpr121->client;  in mpr_touchkey_report()
96 		dev_err(&client->dev, "i2c read error [%d]\n", reg);  in mpr_touchkey_report()
103 		dev_err(&client->dev, "i2c read error [%d]\n", reg);  in mpr_touchkey_report()
109 	bit_changed = reg ^ mpr121->statusbits;  in mpr_touchkey_report()
110 	mpr121->statusbits = reg;  in mpr_touchkey_report()
111 	for_each_set_bit(key_num, &bit_changed, mpr121->keycount) {  in mpr_touchkey_report()
115 		key_val = mpr121->keycodes[key_num];  in mpr_touchkey_report()
120 		dev_dbg(&client->dev, "key %d %d %s\n", key_num, key_val,  in mpr_touchkey_report()
131 	mpr_touchkey_report(mpr121->input_dev);  in mpr_touchkey_interrupt()
143 	/* Set up touch/release threshold for ele0-ele11 */  in mpr121_phys_init()
158 		ret = i2c_smbus_write_byte_data(client, reg->addr, reg->val);  in mpr121_phys_init()
166 	 * The internal MPR121-auto-configuration can do this if it's  in mpr121_phys_init()
170 	usl = ((vdd - 700) * 256) / vdd;  in mpr121_phys_init()
182 	eleconf = mpr121->keycount | ELECTRODE_CONF_QUICK_CHARGE;  in mpr121_phys_init()
188 	dev_dbg(&client->dev, "set up with %x keys.\n", mpr121->keycount);  in mpr121_phys_init()
193 	dev_err(&client->dev, "i2c write error: %d\n", ret);  in mpr121_phys_init()
199 	struct device *dev = &client->dev;  in mpr_touchkey_probe()
213 		return -ENOMEM;  in mpr_touchkey_probe()
217 		return -ENOMEM;  in mpr_touchkey_probe()
219 	mpr121->client = client;  in mpr_touchkey_probe()
220 	mpr121->input_dev = input_dev;  in mpr_touchkey_probe()
221 	mpr121->keycount = device_property_count_u32(dev, "linux,keycodes");  in mpr_touchkey_probe()
222 	if (mpr121->keycount > MPR121_MAX_KEY_COUNT) {  in mpr_touchkey_probe()
223 		dev_err(dev, "too many keys defined (%d)\n", mpr121->keycount);  in mpr_touchkey_probe()
224 		return -EINVAL;  in mpr_touchkey_probe()
228 					       mpr121->keycodes,  in mpr_touchkey_probe()
229 					       mpr121->keycount);  in mpr_touchkey_probe()
236 	input_dev->name = "Freescale MPR121 Touchkey";  in mpr_touchkey_probe()
237 	input_dev->id.bustype = BUS_I2C;  in mpr_touchkey_probe()
238 	input_dev->dev.parent = dev;  in mpr_touchkey_probe()
240 		__set_bit(EV_REP, input_dev->evbit);  in mpr_touchkey_probe()
244 	input_dev->keycode = mpr121->keycodes;  in mpr_touchkey_probe()
245 	input_dev->keycodesize = sizeof(mpr121->keycodes[0]);  in mpr_touchkey_probe()
246 	input_dev->keycodemax = mpr121->keycount;  in mpr_touchkey_probe()
248 	for (i = 0; i < mpr121->keycount; i++)  in mpr_touchkey_probe()
249 		input_set_capability(input_dev, EV_KEY, mpr121->keycodes[i]);  in mpr_touchkey_probe()
257 	device_property_read_u32(dev, "poll-interval", &poll_interval);  in mpr_touchkey_probe()
259 	if (client->irq) {  in mpr_touchkey_probe()
260 		error = devm_request_threaded_irq(dev, client->irq, NULL,  in mpr_touchkey_probe()
264 						  dev->driver->name, mpr121);  in mpr_touchkey_probe()
271 			return -EINVAL;  in mpr_touchkey_probe()
274 			return -EINVAL;  in mpr_touchkey_probe()
290 		return -EINVAL;  in mpr_touchkey_probe()
299 			device_property_read_bool(dev, "wakeup-source"));  in mpr_touchkey_probe()
308 	if (device_may_wakeup(&client->dev))  in mpr_suspend()
309 		enable_irq_wake(client->irq);  in mpr_suspend()
321 	if (device_may_wakeup(&client->dev))  in mpr_resume()
322 		disable_irq_wake(client->irq);  in mpr_resume()
325 				  mpr121->keycount);  in mpr_resume()
340 	{ .compatible = "fsl,mpr121-touchkey" },
360 MODULE_DESCRIPTION("Touch Key driver for Freescale MPR121 Chip");