| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Constantin Musca | 959 | 88.06% | 1 | 7.14% |
| Val Packett | 59 | 5.42% | 1 | 7.14% |
| Javier Martinez Canillas | 26 | 2.39% | 1 | 7.14% |
| Uwe Kleine-König | 24 | 2.20% | 4 | 28.57% |
| Hans de Goede | 9 | 0.83% | 1 | 7.14% |
| Jonathan Cameron | 6 | 0.55% | 1 | 7.14% |
| David Lechner | 2 | 0.18% | 1 | 7.14% |
| Andy Shevchenko | 1 | 0.09% | 1 | 7.14% |
| Gwendal Grignou | 1 | 0.09% | 1 | 7.14% |
| Wei Yongjun | 1 | 0.09% | 1 | 7.14% |
| Thomas Gleixner | 1 | 0.09% | 1 | 7.14% |
| Total | 1089 | 14 |
// SPDX-License-Identifier: GPL-2.0-only /* * Freescale MMA7660FC 3-Axis Accelerometer * * Copyright (c) 2016, Intel Corporation. * * IIO driver for Freescale MMA7660FC; 7-bit I2C address: 0x4c. */ #include <linux/i2c.h> #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define MMA7660_DRIVER_NAME "mma7660" #define MMA7660_REG_XOUT 0x00 #define MMA7660_REG_YOUT 0x01 #define MMA7660_REG_ZOUT 0x02 #define MMA7660_REG_OUT_BIT_ALERT BIT(6) #define MMA7660_REG_MODE 0x07 #define MMA7660_REG_MODE_BIT_MODE BIT(0) #define MMA7660_REG_MODE_BIT_TON BIT(2) #define MMA7660_I2C_READ_RETRIES 5 /* * The accelerometer has one measurement range: * * -1.5g - +1.5g (6-bit, signed) * * scale = (1.5 + 1.5) * 9.81 / (2^6 - 1) = 0.467142857 */ #define MMA7660_SCALE_AVAIL "0.467142857" static const int mma7660_nscale = 467142857; enum mma7660_mode { MMA7660_MODE_STANDBY, MMA7660_MODE_ACTIVE }; struct mma7660_data { struct i2c_client *client; struct mutex lock; enum mma7660_mode mode; struct iio_mount_matrix orientation; }; static const struct iio_mount_matrix * mma7660_get_mount_matrix(const struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { struct mma7660_data *data = iio_priv(indio_dev); return &data->orientation; } static const struct iio_chan_spec_ext_info mma7660_ext_info[] = { IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, mma7660_get_mount_matrix), { } }; static IIO_CONST_ATTR(in_accel_scale_available, MMA7660_SCALE_AVAIL); static struct attribute *mma7660_attributes[] = { &iio_const_attr_in_accel_scale_available.dev_attr.attr, NULL, }; static const struct attribute_group mma7660_attribute_group = { .attrs = mma7660_attributes }; #define MMA7660_CHANNEL(reg, axis) { \ .type = IIO_ACCEL, \ .address = reg, \ .modified = 1, \ .channel2 = IIO_MOD_##axis, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .ext_info = mma7660_ext_info, \ } static const struct iio_chan_spec mma7660_channels[] = { MMA7660_CHANNEL(MMA7660_REG_XOUT, X), MMA7660_CHANNEL(MMA7660_REG_YOUT, Y), MMA7660_CHANNEL(MMA7660_REG_ZOUT, Z), }; static int mma7660_set_mode(struct mma7660_data *data, enum mma7660_mode mode) { int ret; struct i2c_client *client = data->client; if (mode == data->mode) return 0; ret = i2c_smbus_read_byte_data(client, MMA7660_REG_MODE); if (ret < 0) { dev_err(&client->dev, "failed to read sensor mode\n"); return ret; } if (mode == MMA7660_MODE_ACTIVE) { ret &= ~MMA7660_REG_MODE_BIT_TON; ret |= MMA7660_REG_MODE_BIT_MODE; } else { ret &= ~MMA7660_REG_MODE_BIT_TON; ret &= ~MMA7660_REG_MODE_BIT_MODE; } ret = i2c_smbus_write_byte_data(client, MMA7660_REG_MODE, ret); if (ret < 0) { dev_err(&client->dev, "failed to change sensor mode\n"); return ret; } data->mode = mode; return ret; } static int mma7660_read_accel(struct mma7660_data *data, u8 address) { int ret, retries = MMA7660_I2C_READ_RETRIES; struct i2c_client *client = data->client; /* * Read data. If the Alert bit is set, the register was read at * the same time as the device was attempting to update the content. * The solution is to read the register again. Do this only * MMA7660_I2C_READ_RETRIES times to avoid spending too much time * in the kernel. */ do { ret = i2c_smbus_read_byte_data(client, address); if (ret < 0) { dev_err(&client->dev, "register read failed\n"); return ret; } } while (retries-- > 0 && ret & MMA7660_REG_OUT_BIT_ALERT); if (ret & MMA7660_REG_OUT_BIT_ALERT) { dev_err(&client->dev, "all register read retries failed\n"); return -ETIMEDOUT; } return ret; } static int mma7660_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct mma7660_data *data = iio_priv(indio_dev); int ret; switch (mask) { case IIO_CHAN_INFO_RAW: mutex_lock(&data->lock); ret = mma7660_read_accel(data, chan->address); mutex_unlock(&data->lock); if (ret < 0) return ret; *val = sign_extend32(ret, 5); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = 0; *val2 = mma7660_nscale; return IIO_VAL_INT_PLUS_NANO; default: return -EINVAL; } return -EINVAL; } static const struct iio_info mma7660_info = { .read_raw = mma7660_read_raw, .attrs = &mma7660_attribute_group, }; static int mma7660_probe(struct i2c_client *client) { int ret; struct iio_dev *indio_dev; struct mma7660_data *data; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); data->client = client; i2c_set_clientdata(client, indio_dev); mutex_init(&data->lock); data->mode = MMA7660_MODE_STANDBY; ret = iio_read_mount_matrix(&client->dev, &data->orientation); if (ret) return ret; indio_dev->info = &mma7660_info; indio_dev->name = MMA7660_DRIVER_NAME; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = mma7660_channels; indio_dev->num_channels = ARRAY_SIZE(mma7660_channels); ret = mma7660_set_mode(data, MMA7660_MODE_ACTIVE); if (ret < 0) return ret; ret = iio_device_register(indio_dev); if (ret < 0) { dev_err(&client->dev, "device_register failed\n"); mma7660_set_mode(data, MMA7660_MODE_STANDBY); } return ret; } static void mma7660_remove(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); int ret; iio_device_unregister(indio_dev); ret = mma7660_set_mode(iio_priv(indio_dev), MMA7660_MODE_STANDBY); if (ret) dev_warn(&client->dev, "Failed to put device in stand-by mode (%pe), ignoring\n", ERR_PTR(ret)); } static int mma7660_suspend(struct device *dev) { struct mma7660_data *data; data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); return mma7660_set_mode(data, MMA7660_MODE_STANDBY); } static int mma7660_resume(struct device *dev) { struct mma7660_data *data; data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); return mma7660_set_mode(data, MMA7660_MODE_ACTIVE); } static DEFINE_SIMPLE_DEV_PM_OPS(mma7660_pm_ops, mma7660_suspend, mma7660_resume); static const struct i2c_device_id mma7660_i2c_id[] = { { .name = "mma7660" }, { } }; MODULE_DEVICE_TABLE(i2c, mma7660_i2c_id); static const struct of_device_id mma7660_of_match[] = { { .compatible = "fsl,mma7660" }, { } }; MODULE_DEVICE_TABLE(of, mma7660_of_match); static const struct acpi_device_id mma7660_acpi_id[] = { {"MMA7660", 0}, { } }; MODULE_DEVICE_TABLE(acpi, mma7660_acpi_id); static struct i2c_driver mma7660_driver = { .driver = { .name = "mma7660", .pm = pm_sleep_ptr(&mma7660_pm_ops), .of_match_table = mma7660_of_match, .acpi_match_table = mma7660_acpi_id, }, .probe = mma7660_probe, .remove = mma7660_remove, .id_table = mma7660_i2c_id, }; module_i2c_driver(mma7660_driver); MODULE_AUTHOR("Constantin Musca <constantin.musca@intel.com>"); MODULE_DESCRIPTION("Freescale MMA7660FC 3-Axis Accelerometer driver"); MODULE_LICENSE("GPL v2");