1 // SPDX-License-Identifier: GPL-2.0-only
3  * Freescale MMA7660FC 3-Axis Accelerometer
7  * IIO driver for Freescale MMA7660FC; 7-bit I2C address: 0x4c.
21 #define MMA7660_REG_OUT_BIT_ALERT	BIT(6)
32  * -1.5g - +1.5g (6-bit, signed)
34  * scale = (1.5 + 1.5) * 9.81 / (2^6 - 1)	= 0.467142857
41 #define MMA7660_CHANNEL(reg, axis) {	\  argument
45 	.channel2 = IIO_MOD_##axis,	\
82 	struct i2c_client *client = data->client;  in mma7660_set_mode()
84 	if (mode == data->mode)  in mma7660_set_mode()
89 		dev_err(&client->dev, "failed to read sensor mode\n");  in mma7660_set_mode()
103 		dev_err(&client->dev, "failed to change sensor mode\n");  in mma7660_set_mode()
107 	data->mode = mode;  in mma7660_set_mode()
115 	struct i2c_client *client = data->client;  in mma7660_read_accel()
127 			dev_err(&client->dev, "register read failed\n");  in mma7660_read_accel()
130 	} while (retries-- > 0 && ret & MMA7660_REG_OUT_BIT_ALERT);  in mma7660_read_accel()
133 		dev_err(&client->dev, "all register read retries failed\n");  in mma7660_read_accel()
134 		return -ETIMEDOUT;  in mma7660_read_accel()
149 		mutex_lock(&data->lock);  in mma7660_read_raw()
150 		ret = mma7660_read_accel(data, chan->address);  in mma7660_read_raw()
151 		mutex_unlock(&data->lock);  in mma7660_read_raw()
161 		return -EINVAL;  in mma7660_read_raw()
164 	return -EINVAL;  in mma7660_read_raw()
179 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in mma7660_probe()
181 		dev_err(&client->dev, "iio allocation failed!\n");  in mma7660_probe()
182 		return -ENOMEM;  in mma7660_probe()
186 	data->client = client;  in mma7660_probe()
188 	mutex_init(&data->lock);  in mma7660_probe()
189 	data->mode = MMA7660_MODE_STANDBY;  in mma7660_probe()
191 	indio_dev->info = &mma7660_info;  in mma7660_probe()
192 	indio_dev->name = MMA7660_DRIVER_NAME;  in mma7660_probe()
193 	indio_dev->modes = INDIO_DIRECT_MODE;  in mma7660_probe()
194 	indio_dev->channels = mma7660_channels;  in mma7660_probe()
195 	indio_dev->num_channels = ARRAY_SIZE(mma7660_channels);  in mma7660_probe()
203 		dev_err(&client->dev, "device_register failed\n");  in mma7660_probe()
279 MODULE_DESCRIPTION("Freescale MMA7660FC 3-Axis Accelerometer driver");