Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Hans de Goede | 631 | 80.79% | 2 | 25.00% |
Luke Ross | 115 | 14.72% | 1 | 12.50% |
Alexandru Ardelean | 21 | 2.69% | 1 | 12.50% |
Uwe Kleine-König | 9 | 1.15% | 2 | 25.00% |
Jonathan Cameron | 4 | 0.51% | 1 | 12.50% |
Thomas Gleixner | 1 | 0.13% | 1 | 12.50% |
Total | 781 | 8 |
// SPDX-License-Identifier: GPL-2.0-only /* * IIO driver for the MiraMEMS DA217 and DA280 3-axis accelerometer and * IIO driver for the MiraMEMS DA226 2-axis accelerometer * * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com> */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/acpi.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/byteorder/generic.h> #define DA280_REG_CHIP_ID 0x01 #define DA280_REG_ACC_X_LSB 0x02 #define DA280_REG_ACC_Y_LSB 0x04 #define DA280_REG_ACC_Z_LSB 0x06 #define DA280_REG_MODE_BW 0x11 #define DA280_CHIP_ID 0x13 #define DA280_MODE_ENABLE 0x1e #define DA280_MODE_DISABLE 0x9e enum da280_chipset { da217, da226, da280 }; /* * a value of + or -4096 corresponds to + or - 1G * scale = 9.81 / 4096 = 0.002395019 */ static const int da280_nscale = 2395019; #define DA280_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), \ } static const struct iio_chan_spec da280_channels[] = { DA280_CHANNEL(DA280_REG_ACC_X_LSB, X), DA280_CHANNEL(DA280_REG_ACC_Y_LSB, Y), DA280_CHANNEL(DA280_REG_ACC_Z_LSB, Z), }; struct da280_data { struct i2c_client *client; }; static int da280_enable(struct i2c_client *client, bool enable) { u8 data = enable ? DA280_MODE_ENABLE : DA280_MODE_DISABLE; return i2c_smbus_write_byte_data(client, DA280_REG_MODE_BW, data); } static int da280_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct da280_data *data = iio_priv(indio_dev); int ret; switch (mask) { case IIO_CHAN_INFO_RAW: ret = i2c_smbus_read_word_data(data->client, chan->address); if (ret < 0) return ret; /* * Values are 14 bits, stored as 16 bits with the 2 * least significant bits always 0. */ *val = (short)ret >> 2; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = 0; *val2 = da280_nscale; return IIO_VAL_INT_PLUS_NANO; default: return -EINVAL; } } static const struct iio_info da280_info = { .read_raw = da280_read_raw, }; static enum da280_chipset da280_match_acpi_device(struct device *dev) { const struct acpi_device_id *id; id = acpi_match_device(dev->driver->acpi_match_table, dev); if (!id) return -EINVAL; return (enum da280_chipset) id->driver_data; } static void da280_disable(void *client) { da280_enable(client, false); } static int da280_probe(struct i2c_client *client) { const struct i2c_device_id *id = i2c_client_get_device_id(client); int ret; struct iio_dev *indio_dev; struct da280_data *data; enum da280_chipset chip; ret = i2c_smbus_read_byte_data(client, DA280_REG_CHIP_ID); if (ret != DA280_CHIP_ID) return (ret < 0) ? ret : -ENODEV; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); data->client = client; indio_dev->info = &da280_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = da280_channels; if (ACPI_HANDLE(&client->dev)) { chip = da280_match_acpi_device(&client->dev); } else { chip = id->driver_data; } if (chip == da217) { indio_dev->name = "da217"; indio_dev->num_channels = 3; } else if (chip == da226) { indio_dev->name = "da226"; indio_dev->num_channels = 2; } else { indio_dev->name = "da280"; indio_dev->num_channels = 3; } ret = da280_enable(client, true); if (ret < 0) return ret; ret = devm_add_action_or_reset(&client->dev, da280_disable, client); if (ret) return ret; return devm_iio_device_register(&client->dev, indio_dev); } static int da280_suspend(struct device *dev) { return da280_enable(to_i2c_client(dev), false); } static int da280_resume(struct device *dev) { return da280_enable(to_i2c_client(dev), true); } static DEFINE_SIMPLE_DEV_PM_OPS(da280_pm_ops, da280_suspend, da280_resume); static const struct acpi_device_id da280_acpi_match[] = { {"NSA2513", da217}, {"MIRAACC", da280}, {}, }; MODULE_DEVICE_TABLE(acpi, da280_acpi_match); static const struct i2c_device_id da280_i2c_id[] = { { "da217", da217 }, { "da226", da226 }, { "da280", da280 }, {} }; MODULE_DEVICE_TABLE(i2c, da280_i2c_id); static struct i2c_driver da280_driver = { .driver = { .name = "da280", .acpi_match_table = ACPI_PTR(da280_acpi_match), .pm = pm_sleep_ptr(&da280_pm_ops), }, .probe = da280_probe, .id_table = da280_i2c_id, }; module_i2c_driver(da280_driver); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); MODULE_DESCRIPTION("MiraMEMS DA280 3-Axis Accelerometer driver"); MODULE_LICENSE("GPL v2");
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