1 // SPDX-License-Identifier: GPL-2.0-only
53  * The following table lists the maximum appropriate poll interval for each
54  * available output data rate.
84 			.addr = tj9->client->addr,  in kxtj9_i2c_read()
85 			.flags = tj9->client->flags,  in kxtj9_i2c_read()
90 			.addr = tj9->client->addr,  in kxtj9_i2c_read()
91 			.flags = tj9->client->flags | I2C_M_RD,  in kxtj9_i2c_read()
97 	return i2c_transfer(tj9->client->adapter, msgs, 2);  in kxtj9_i2c_read()
108 		dev_err(&tj9->client->dev, "accelerometer data read failed\n");  in kxtj9_report_acceleration_data()
110 	x = le16_to_cpu(acc_data[tj9->pdata.axis_map_x]);  in kxtj9_report_acceleration_data()
111 	y = le16_to_cpu(acc_data[tj9->pdata.axis_map_y]);  in kxtj9_report_acceleration_data()
112 	z = le16_to_cpu(acc_data[tj9->pdata.axis_map_z]);  in kxtj9_report_acceleration_data()
114 	x >>= tj9->shift;  in kxtj9_report_acceleration_data()
115 	y >>= tj9->shift;  in kxtj9_report_acceleration_data()
116 	z >>= tj9->shift;  in kxtj9_report_acceleration_data()
118 	input_report_abs(tj9->input_dev, ABS_X, tj9->pdata.negate_x ? -x : x);  in kxtj9_report_acceleration_data()
119 	input_report_abs(tj9->input_dev, ABS_Y, tj9->pdata.negate_y ? -y : y);  in kxtj9_report_acceleration_data()
120 	input_report_abs(tj9->input_dev, ABS_Z, tj9->pdata.negate_z ? -z : z);  in kxtj9_report_acceleration_data()
121 	input_sync(tj9->input_dev);  in kxtj9_report_acceleration_data()
132 	err = i2c_smbus_read_byte_data(tj9->client, INT_REL);  in kxtj9_isr()
134 		dev_err(&tj9->client->dev,  in kxtj9_isr()
144 		tj9->shift = 4;  in kxtj9_update_g_range()
147 		tj9->shift = 3;  in kxtj9_update_g_range()
150 		tj9->shift = 2;  in kxtj9_update_g_range()
153 		return -EINVAL;  in kxtj9_update_g_range()
156 	tj9->ctrl_reg1 &= 0xe7;  in kxtj9_update_g_range()
157 	tj9->ctrl_reg1 |= new_g_range;  in kxtj9_update_g_range()
167 	/* Use the lowest ODR that can support the requested poll interval */  in kxtj9_update_odr()
169 		tj9->data_ctrl = kxtj9_odr_table[i].mask;  in kxtj9_update_odr()
174 	err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0);  in kxtj9_update_odr()
178 	err = i2c_smbus_write_byte_data(tj9->client, DATA_CTRL, tj9->data_ctrl);  in kxtj9_update_odr()
182 	err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);  in kxtj9_update_odr()
191 	if (tj9->pdata.power_on)  in kxtj9_device_power_on()
192 		return tj9->pdata.power_on();  in kxtj9_device_power_on()
201 	tj9->ctrl_reg1 &= PC1_OFF;  in kxtj9_device_power_off()
202 	err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);  in kxtj9_device_power_off()
204 		dev_err(&tj9->client->dev, "soft power off failed\n");  in kxtj9_device_power_off()
206 	if (tj9->pdata.power_off)  in kxtj9_device_power_off()
207 		tj9->pdata.power_off();  in kxtj9_device_power_off()
219 	err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0);  in kxtj9_enable()
224 	if (tj9->client->irq) {  in kxtj9_enable()
225 		err = i2c_smbus_write_byte_data(tj9->client,  in kxtj9_enable()
226 						INT_CTRL1, tj9->int_ctrl);  in kxtj9_enable()
231 	err = kxtj9_update_g_range(tj9, tj9->pdata.g_range);  in kxtj9_enable()
236 	tj9->ctrl_reg1 |= PC1_ON;  in kxtj9_enable()
237 	err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);  in kxtj9_enable()
241 	err = kxtj9_update_odr(tj9, tj9->last_poll_interval);  in kxtj9_enable()
246 	if (tj9->client->irq) {  in kxtj9_enable()
247 		err = i2c_smbus_read_byte_data(tj9->client, INT_REL);  in kxtj9_enable()
249 			dev_err(&tj9->client->dev,  in kxtj9_enable()
283  * to change the output data rate of the part.  For consistency, we are using
284  * the set_poll method, which accepts a poll interval in milliseconds, and then
286  * data outputs will not be read AT the requested poll interval, rather, the
292 /* Returns currently selected poll interval (in ms) */
299 	return sprintf(buf, "%d\n", tj9->last_poll_interval);  in kxtj9_get_poll()
302 /* Allow users to select a new poll interval (in ms) */
308 	struct input_dev *input_dev = tj9->input_dev;  in kxtj9_set_poll()
317 	guard(mutex)(&input_dev->mutex);  in kxtj9_set_poll()
318 	guard(disable_irq)(&client->irq);  in kxtj9_set_poll()
324 	tj9->last_poll_interval = max(interval, tj9->pdata.min_interval);  in kxtj9_set_poll()
326 	kxtj9_update_odr(tj9, tj9->last_poll_interval);  in kxtj9_set_poll()
331 static DEVICE_ATTR(poll, S_IRUGO|S_IWUSR, kxtj9_get_poll, kxtj9_set_poll);
344 	return client->irq ? attr->mode : 0;  in kxtj9_attr_is_visible()
360 	if (poll_interval != tj9->last_poll_interval) {  in kxtj9_poll()
362 		tj9->last_poll_interval = poll_interval;  in kxtj9_poll()
370 	if (tj9->pdata.exit)  in kxtj9_platform_exit()
371 		tj9->pdata.exit();  in kxtj9_platform_exit()
382 	retval = i2c_smbus_read_byte_data(tj9->client, WHO_AM_I);  in kxtj9_verify()
384 		dev_err(&tj9->client->dev, "read err int source\n");  in kxtj9_verify()
388 	retval = (retval != 0x07 && retval != 0x08) ? -EIO : 0;  in kxtj9_verify()
398 			dev_get_platdata(&client->dev);  in kxtj9_probe()
403 	if (!i2c_check_functionality(client->adapter,  in kxtj9_probe()
405 		dev_err(&client->dev, "client is not i2c capable\n");  in kxtj9_probe()
406 		return -ENXIO;  in kxtj9_probe()
410 		dev_err(&client->dev, "platform data is NULL; exiting\n");  in kxtj9_probe()
411 		return -EINVAL;  in kxtj9_probe()
414 	tj9 = devm_kzalloc(&client->dev, sizeof(*tj9), GFP_KERNEL);  in kxtj9_probe()
416 		dev_err(&client->dev,  in kxtj9_probe()
418 		return -ENOMEM;  in kxtj9_probe()
421 	tj9->client = client;  in kxtj9_probe()
422 	tj9->pdata = *pdata;  in kxtj9_probe()
424 	if (pdata->init) {  in kxtj9_probe()
425 		err = pdata->init();  in kxtj9_probe()
430 	err = devm_add_action_or_reset(&client->dev, kxtj9_platform_exit, tj9);  in kxtj9_probe()
436 		dev_err(&client->dev, "device not recognized\n");  in kxtj9_probe()
442 	tj9->ctrl_reg1 = tj9->pdata.res_12bit | tj9->pdata.g_range;  in kxtj9_probe()
443 	tj9->last_poll_interval = tj9->pdata.init_interval;  in kxtj9_probe()
445 	input_dev = devm_input_allocate_device(&client->dev);  in kxtj9_probe()
447 		dev_err(&client->dev, "input device allocate failed\n");  in kxtj9_probe()
448 		return -ENOMEM;  in kxtj9_probe()
452 	tj9->input_dev = input_dev;  in kxtj9_probe()
454 	input_dev->name = "kxtj9_accel";  in kxtj9_probe()
455 	input_dev->id.bustype = BUS_I2C;  in kxtj9_probe()
457 	input_dev->open = kxtj9_input_open;  in kxtj9_probe()
458 	input_dev->close = kxtj9_input_close;  in kxtj9_probe()
460 	input_set_abs_params(input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT);  in kxtj9_probe()
461 	input_set_abs_params(input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT);  in kxtj9_probe()
462 	input_set_abs_params(input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT);  in kxtj9_probe()
464 	if (client->irq <= 0) {  in kxtj9_probe()
472 		dev_err(&client->dev,  in kxtj9_probe()
474 			input_dev->name, err);  in kxtj9_probe()
478 	if (client->irq) {  in kxtj9_probe()
480 		tj9->int_ctrl |= KXTJ9_IEN | KXTJ9_IEA | KXTJ9_IEL;  in kxtj9_probe()
481 		tj9->ctrl_reg1 |= DRDYE;  in kxtj9_probe()
483 		err = devm_request_threaded_irq(&client->dev, client->irq,  in kxtj9_probe()
487 						"kxtj9-irq", tj9);  in kxtj9_probe()
489 			dev_err(&client->dev, "request irq failed: %d\n", err);  in kxtj9_probe()
501 	struct input_dev *input_dev = tj9->input_dev;  in kxtj9_suspend()
503 	guard(mutex)(&input_dev->mutex);  in kxtj9_suspend()
515 	struct input_dev *input_dev = tj9->input_dev;  in kxtj9_resume()
517 	guard(mutex)(&input_dev->mutex);  in kxtj9_resume()