^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * IIO driver for the MiraMEMS DA280 3-axis accelerometer and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * IIO driver for the MiraMEMS DA226 2-axis accelerometer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/byteorder/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define DA280_REG_CHIP_ID 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DA280_REG_ACC_X_LSB 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define DA280_REG_ACC_Y_LSB 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DA280_REG_ACC_Z_LSB 0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DA280_REG_MODE_BW 0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define DA280_CHIP_ID 0x13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DA280_MODE_ENABLE 0x1e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DA280_MODE_DISABLE 0x9e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) enum da280_chipset { da226, da280 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * a value of + or -4096 corresponds to + or - 1G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * scale = 9.81 / 4096 = 0.002395019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static const int da280_nscale = 2395019;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define DA280_CHANNEL(reg, axis) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .type = IIO_ACCEL, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .address = reg, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .modified = 1, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .channel2 = IIO_MOD_##axis, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static const struct iio_chan_spec da280_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) DA280_CHANNEL(DA280_REG_ACC_X_LSB, X),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) DA280_CHANNEL(DA280_REG_ACC_Y_LSB, Y),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) DA280_CHANNEL(DA280_REG_ACC_Z_LSB, Z),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct da280_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int da280_enable(struct i2c_client *client, bool enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u8 data = enable ? DA280_MODE_ENABLE : DA280_MODE_DISABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return i2c_smbus_write_byte_data(client, DA280_REG_MODE_BW, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int da280_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct da280_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ret = i2c_smbus_read_word_data(data->client, chan->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * Values are 14 bits, stored as 16 bits with the 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * least significant bits always 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) *val = (short)ret >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) *val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) *val2 = da280_nscale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return IIO_VAL_INT_PLUS_NANO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static const struct iio_info da280_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .read_raw = da280_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static enum da280_chipset da280_match_acpi_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) const struct acpi_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) id = acpi_match_device(dev->driver->acpi_match_table, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return (enum da280_chipset) id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int da280_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct da280_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) enum da280_chipset chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ret = i2c_smbus_read_byte_data(client, DA280_REG_CHIP_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (ret != DA280_CHIP_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return (ret < 0) ? ret : -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) indio_dev->info = &da280_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) indio_dev->channels = da280_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (ACPI_HANDLE(&client->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) chip = da280_match_acpi_device(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) chip = id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (chip == da226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) indio_dev->name = "da226";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) indio_dev->num_channels = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) indio_dev->name = "da280";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) indio_dev->num_channels = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ret = da280_enable(client, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) dev_err(&client->dev, "device_register failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) da280_enable(client, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int da280_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return da280_enable(client, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int da280_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return da280_enable(to_i2c_client(dev), false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int da280_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return da280_enable(to_i2c_client(dev), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static SIMPLE_DEV_PM_OPS(da280_pm_ops, da280_suspend, da280_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static const struct acpi_device_id da280_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {"MIRAACC", da280},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) MODULE_DEVICE_TABLE(acpi, da280_acpi_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static const struct i2c_device_id da280_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) { "da226", da226 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) { "da280", da280 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) MODULE_DEVICE_TABLE(i2c, da280_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static struct i2c_driver da280_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .name = "da280",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .acpi_match_table = ACPI_PTR(da280_acpi_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .pm = &da280_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .probe = da280_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .remove = da280_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .id_table = da280_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) module_i2c_driver(da280_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) MODULE_DESCRIPTION("MiraMEMS DA280 3-Axis Accelerometer driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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