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Co-developed-by: Carlos Song Signed-off-by: Carlos Song Signed-off-by: Frank Li --- Change in v3 - remove mmc5633_hw_set - make -> Make - change indention for mmc5633_samp_freq - use u8 arrary to handle dword data - get_unaligned_be16() to get raw data - add helper function to check if i3c support hdr - use read_avail() callback change in v2 - new patch --- drivers/iio/magnetometer/Kconfig | 12 + drivers/iio/magnetometer/Makefile | 1 + drivers/iio/magnetometer/mmc5633.c | 534 +++++++++++++++++++++++++++++++++= ++++ 3 files changed, 547 insertions(+) diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kc= onfig index 81b812a29044e2b0b9ff84889c21aa3ebc20be35..cfb74a4a083630678a1db1132a1= 4264de451a31a 100644 --- a/drivers/iio/magnetometer/Kconfig +++ b/drivers/iio/magnetometer/Kconfig @@ -139,6 +139,18 @@ config MMC35240 To compile this driver as a module, choose M here: the module will be called mmc35240. =20 +config MMC5633 + tristate "MEMSIC MMC5633 3-axis magnetic sensor" + select REGMAP_I2C + select REGMAP_I3C + depends on I2C || I3C + help + Say yes here to build support for the MEMSIC MMC5633 3-axis + magnetic sensor. + + To compile this driver as a module, choose M here: the module + will be called mmc5633 + config IIO_ST_MAGN_3AXIS tristate "STMicroelectronics magnetometers 3-Axis Driver" depends on (I2C || SPI_MASTER) && SYSFS diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/M= akefile index dfe970fcacb8664b293af84893f7d3e3e8d7bf7e..5bd227f8c1204bdd8b8a43da180= 833eedca1457b 100644 --- a/drivers/iio/magnetometer/Makefile +++ b/drivers/iio/magnetometer/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_BMC150_MAGN_SPI) +=3D bmc150_magn_spi.o obj-$(CONFIG_MAG3110) +=3D mag3110.o obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) +=3D hid-sensor-magn-3d.o obj-$(CONFIG_MMC35240) +=3D mmc35240.o +obj-$(CONFIG_MMC5633) +=3D mmc5633.o =20 obj-$(CONFIG_IIO_ST_MAGN_3AXIS) +=3D st_magn.o st_magn-y :=3D st_magn_core.o diff --git a/drivers/iio/magnetometer/mmc5633.c b/drivers/iio/magnetometer/= mmc5633.c new file mode 100644 index 0000000000000000000000000000000000000000..bcd79ab6053d50026961f7cf9da= 296c30c720399 --- /dev/null +++ b/drivers/iio/magnetometer/mmc5633.c @@ -0,0 +1,534 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MMC5633 - MEMSIC 3-axis Magnetic Sensor + * + * Copyright (c) 2015, Intel Corporation. + * Copyright (c) 2025, NXP + * + * IIO driver for MMC5633, base on mmc35240.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MMC5633_REG_XOUT_L 0x00 +#define MMC5633_REG_XOUT_H 0x01 +#define MMC5633_REG_YOUT_L 0x02 +#define MMC5633_REG_YOUT_H 0x03 +#define MMC5633_REG_ZOUT_L 0x04 +#define MMC5633_REG_ZOUT_H 0x05 +#define MMC5633_REG_XOUT_2 0x06 +#define MMC5633_REG_YOUT_2 0x07 +#define MMC5633_REG_ZOUT_2 0x08 + +#define MMC5633_REG_STATUS1 0x18 +#define MMC5633_REG_STATUS0 0x19 +#define MMC5633_REG_CTRL0 0x1b +#define MMC5633_REG_CTRL1 0x1c +#define MMC5633_REG_CTRL2 0x1d + +#define MMC5633_REG_ID 0x39 + +#define MMC5633_STATUS1_MEAS_M_DONE_BIT BIT(6) + +#define MMC5633_CTRL0_CMM_FREQ_EN BIT(7) +#define MMC5633_CTRL0_AUTO_ST_EN BIT(6) +#define MMC5633_CTRL0_AUTO_SR_EN BIT(5) +#define MMC5633_CTRL0_RESET BIT(4) +#define MMC5633_CTRL0_SET BIT(3) +#define MMC5633_CTRL0_MEAS_T BIT(1) +#define MMC5633_CTRL0_MEAS_M BIT(0) + +#define MMC5633_CTRL1_BW0_BIT BIT(0) +#define MMC5633_CTRL1_BW1_BIT BIT(1) + +#define MMC5633_CTRL1_BW_MASK (MMC5633_CTRL1_BW0_BIT | \ + MMC5633_CTRL1_BW1_BIT) + +#define MMC5633_WAIT_CHARGE_PUMP 50000 /* us */ +#define MMC5633_WAIT_SET_RESET 1000 /* us */ + +#define MMC5633_HDR_CTRL0_MEAS_M 0x01 +#define MMC5633_HDR_CTRL0_MEAS_T 0x03 +#define MMC5633_HDR_CTRL0_SET 0X05 +#define MMC5633_HDR_CTRL0_RESET 0x07 + +enum mmc5633_axis { + AXIS_X, + AXIS_Y, + AXIS_Z, +}; + +struct mmc5633_data { + struct device *dev; + struct i3c_device *i3cdev; + struct mutex mutex; /* protect to finish one whole measurement */ + struct regmap *regmap; +}; + +static const struct { + int val; + int val2; +} mmc5633_samp_freq[] =3D { + {1, 200000}, + {2, 0}, + {3, 500000}, + {6, 600000}, +}; + +#define MMC5633_CHANNEL(_axis) { \ + .type =3D IIO_MAGN, \ + .modified =3D 1, \ + .channel2 =3D IIO_MOD_ ## _axis, \ + .address =3D AXIS_ ## _axis, \ + .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_SCALE), \ +} + +static const struct iio_chan_spec mmc5633_channels[] =3D { + MMC5633_CHANNEL(X), + MMC5633_CHANNEL(Y), + MMC5633_CHANNEL(Z), +}; + +static int mmc5633_get_samp_freq_index(struct mmc5633_data *data, + int val, int val2) +{ + int i; + + for (i =3D 0; i < ARRAY_SIZE(mmc5633_samp_freq); i++) + if (mmc5633_samp_freq[i].val =3D=3D val && + mmc5633_samp_freq[i].val2 =3D=3D val2) + return i; + return -EINVAL; +} + +static int mmc5633_init(struct mmc5633_data *data) +{ + unsigned int reg_id, ret; + + ret =3D regmap_read(data->regmap, MMC5633_REG_ID, ®_id); + if (ret < 0) + return dev_err_probe(data->dev, ret, + "Error reading product id\n"); + + /* + * Make sure we restore sensor characteristics, by doing + * a SET/RESET sequence, the axis polarity being naturally + * aligned after RESET. + */ + ret =3D regmap_write(data->regmap, MMC5633_REG_CTRL0, MMC5633_CTRL0_SET); + if (ret < 0) + return ret; + + usleep_range(MMC5633_WAIT_SET_RESET, MMC5633_WAIT_SET_RESET + 1); + + ret =3D regmap_write(data->regmap, MMC5633_REG_CTRL0, MMC5633_CTRL0_RESET= ); + if (ret < 0) + return ret; + + /* set default sampling frequency */ + return regmap_update_bits(data->regmap, MMC5633_REG_CTRL1, + MMC5633_CTRL1_BW_MASK, + FIELD_PREP(MMC5633_CTRL1_BW_MASK, 0)); +} + +static int mmc5633_take_measurement(struct mmc5633_data *data) +{ + unsigned int reg_status; + int ret; + + ret =3D regmap_write(data->regmap, MMC5633_REG_CTRL0, MMC5633_CTRL0_MEAS_= M); + if (ret < 0) + return ret; + + ret =3D regmap_read_poll_timeout(data->regmap, MMC5633_REG_STATUS1, reg_s= tatus, + reg_status & MMC5633_STATUS1_MEAS_M_DONE_BIT, + 10000, 10000 * 100); + if (ret) { + dev_err(data->dev, "data not ready\n"); + return ret; + } + + return 0; +} + +static bool mmc5633_is_support_hdr(struct mmc5633_data *data) +{ + if (!data->i3cdev) + return false; + + return !!(i3c_device_get_supported_xfer_mode(data->i3cdev) & BIT(I3C_HDR_= DDR)); +} + +static int mmc5633_read_measurement(struct mmc5633_data *data, void *buf, = size_t sz) +{ + u8 data_cmd[2], status[2]; + int ret, val; + + if (mmc5633_is_support_hdr(data)) { + struct i3c_xfer xfers_wr_cmd[] =3D { + { + .cmd =3D 0x3b, + .len =3D 2, + .data.out =3D data_cmd, + } + }; + + struct i3c_xfer xfers_rd_sta_cmd[] =3D { + { + .cmd =3D 0x23 | BIT(7), /* RDSTA CMD */ + .len =3D 2, + .data.in =3D status, + }, + }; + + struct i3c_xfer xfers_rd_data_cmd[] =3D { + { + .cmd =3D 0x22 | BIT(7), /* RDLONG CMD */ + .len =3D sz, + .data.in =3D buf, + }, + }; + + data_cmd[0] =3D 0; + data_cmd[1] =3D MMC5633_HDR_CTRL0_MEAS_M; + + ret =3D i3c_device_do_xfers(data->i3cdev, xfers_wr_cmd, 1, I3C_HDR_DDR); + if (ret < 0) + return ret; + + ret =3D read_poll_timeout(i3c_device_do_xfers, val, + val || + status[0] & MMC5633_STATUS1_MEAS_M_DONE_BIT, + 10000, 10000 * 100, 0, + data->i3cdev, xfers_rd_sta_cmd, 1, I3C_HDR_DDR); + + if (ret || val) { + dev_err(data->dev, "data not ready\n"); + return ret ? ret : -EIO; + } + + return i3c_device_do_xfers(data->i3cdev, xfers_rd_data_cmd, 1, I3C_HDR_D= DR); + } + + /* Fallback to use SDR/I2C mode */ + ret =3D mmc5633_take_measurement(data); + if (ret < 0) + return ret; + + return regmap_bulk_read(data->regmap, MMC5633_REG_XOUT_L, buf, sz); +} + +static int mmc5633_get_raw(struct mmc5633_data *data, int index, unsigned = char *buf, int *val) +{ + /* + * X[19..12] X[11..4] Y[19..12] Y[11..4] Z[19..12] Z[11..4] X[3..0] Y[3..= 0] Z[3..0] + */ + *val =3D get_unaligned_be16(buf + 2 * index) << 4; + *val |=3D buf[index + 6] >> 4; + + return 0; +} + +#define MMC5633_ALL_SIZE (3 * 3 + 1) /* each channel have 3 byte and TEMP = */ + +static int mmc5633_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct mmc5633_data *data =3D iio_priv(indio_dev); + char buf[MMC5633_ALL_SIZE]; + unsigned int reg; + int ret, i; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + scoped_guard(mutex, &data->mutex) { + ret =3D mmc5633_read_measurement(data, buf, MMC5633_ALL_SIZE); + if (ret < 0) + return ret; + } + + ret =3D mmc5633_get_raw(data, chan->address, buf, val); + if (ret < 0) + return ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val =3D 0; + *val2 =3D 62500; + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_SAMP_FREQ: + scoped_guard(mutex, &data->mutex) { + ret =3D regmap_read(data->regmap, MMC5633_REG_CTRL1, ®); + if (ret < 0) + return ret; + } + + i =3D FIELD_GET(MMC5633_CTRL1_BW_MASK, reg); + if (i >=3D ARRAY_SIZE(mmc5633_samp_freq)) + return -EINVAL; + + *val =3D mmc5633_samp_freq[i].val; + *val2 =3D mmc5633_samp_freq[i].val2; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +static int mmc5633_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct mmc5633_data *data =3D iio_priv(indio_dev); + int i, ret; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + i =3D mmc5633_get_samp_freq_index(data, val, val2); + if (i < 0) + return -EINVAL; + + scoped_guard(mutex, &data->mutex) { + ret =3D regmap_update_bits(data->regmap, MMC5633_REG_CTRL1, + MMC5633_CTRL1_BW_MASK, + FIELD_PREP(MMC5633_CTRL1_BW_MASK, i)); + if (ret) + return ret; + }; + return ret; + default: + return -EINVAL; + } +} + +static int mmc5633_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, + int *type, + int *length, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *vals =3D (const int *)mmc5633_samp_freq; + *length =3D ARRAY_SIZE(mmc5633_samp_freq) * 2; + *type =3D IIO_VAL_INT_PLUS_MICRO; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + +static const struct iio_info mmc5633_info =3D { + .read_raw =3D mmc5633_read_raw, + .write_raw =3D mmc5633_write_raw, + .read_avail =3D mmc5633_read_avail, +}; + +static bool mmc5633_is_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MMC5633_REG_CTRL0: + case MMC5633_REG_CTRL1: + return true; + default: + return false; + } +} + +static bool mmc5633_is_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MMC5633_REG_XOUT_L: + case MMC5633_REG_XOUT_H: + case MMC5633_REG_YOUT_L: + case MMC5633_REG_YOUT_H: + case MMC5633_REG_ZOUT_L: + case MMC5633_REG_ZOUT_H: + case MMC5633_REG_XOUT_2: + case MMC5633_REG_YOUT_2: + case MMC5633_REG_ZOUT_2: + case MMC5633_REG_STATUS1: + case MMC5633_REG_ID: + return true; + default: + return false; + } +} + +static bool mmc5633_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MMC5633_REG_CTRL0: + case MMC5633_REG_CTRL1: + return false; + default: + return true; + } +} + +static const struct reg_default mmc5633_reg_defaults[] =3D { + { MMC5633_REG_CTRL0, 0x00 }, + { MMC5633_REG_CTRL1, 0x00 }, +}; + +static const struct regmap_config mmc5633_regmap_config =3D { + .name =3D "mmc5633_regmap", + + .reg_bits =3D 8, + .val_bits =3D 8, + + .max_register =3D MMC5633_REG_ID, + .cache_type =3D REGCACHE_FLAT, + + .writeable_reg =3D mmc5633_is_writeable_reg, + .readable_reg =3D mmc5633_is_readable_reg, + .volatile_reg =3D mmc5633_is_volatile_reg, + + .reg_defaults =3D mmc5633_reg_defaults, + .num_reg_defaults =3D ARRAY_SIZE(mmc5633_reg_defaults), +}; + +static int mmc5633_common_probe(struct device *dev, struct regmap *regmap, + char *name, struct i3c_device *i3cdev) +{ + struct mmc5633_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev =3D devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + dev_set_drvdata(dev, indio_dev); + + data =3D iio_priv(indio_dev); + + data->regmap =3D regmap; + data->i3cdev =3D i3cdev; + data->dev =3D dev; + + ret =3D devm_mutex_init(dev, &data->mutex); + if (ret) + return ret; + + indio_dev->info =3D &mmc5633_info; + indio_dev->name =3D name; + indio_dev->channels =3D mmc5633_channels; + indio_dev->num_channels =3D ARRAY_SIZE(mmc5633_channels); + indio_dev->modes =3D INDIO_DIRECT_MODE; + + ret =3D mmc5633_init(data); + if (ret < 0) + return dev_err_probe(dev, ret, "mmc5633 chip init failed\n"); + + return devm_iio_device_register(dev, indio_dev); +} + +static int mmc5633_suspend(struct device *dev) +{ + struct mmc5633_data *data =3D iio_priv(dev_get_drvdata(dev)); + + regcache_cache_only(data->regmap, true); + + return 0; +} + +static int mmc5633_resume(struct device *dev) +{ + struct mmc5633_data *data =3D iio_priv(dev_get_drvdata(dev)); + int ret; + + regcache_mark_dirty(data->regmap); + ret =3D regcache_sync_region(data->regmap, MMC5633_REG_CTRL0, + MMC5633_REG_CTRL1); + if (ret < 0) + dev_err(dev, "Failed to restore control registers\n"); + + regcache_cache_only(data->regmap, false); + + return 0; +} + +static int mmc5633_i2c_probe(struct i2c_client *client) +{ + struct device *dev =3D &client->dev; + struct regmap *regmap; + + regmap =3D devm_regmap_init_i2c(client, &mmc5633_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "regmap init failed"); + + return mmc5633_common_probe(dev, regmap, client->name, NULL); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(mmc5633_pm_ops, mmc5633_suspend, + mmc5633_resume); + +static const struct of_device_id mmc5633_of_match[] =3D { + { .compatible =3D "memsic,mmc5633", }, + { } +}; +MODULE_DEVICE_TABLE(of, mmc5633_of_match); + +static const struct i2c_device_id mmc5633_i2c_id[] =3D { + { "mmc5633" }, + {} +}; +MODULE_DEVICE_TABLE(i2c, mmc5633_i2c_id); + +static struct i2c_driver mmc5633_i2c_driver =3D { + .driver =3D { + .name =3D "mmc5633_i2c", + .of_match_table =3D mmc5633_of_match, + .pm =3D pm_sleep_ptr(&mmc5633_pm_ops), + }, + .probe =3D mmc5633_i2c_probe, + .id_table =3D mmc5633_i2c_id, +}; + +static const struct i3c_device_id mmc5633_i3c_ids[] =3D { + I3C_DEVICE(0x0251, 0x0000, NULL), + { } +}; +MODULE_DEVICE_TABLE(i3c, mmc5633_i3c_ids); + +static int mmc5633_i3c_probe(struct i3c_device *i3cdev) +{ + struct device *dev =3D i3cdev_to_dev(i3cdev); + struct regmap *regmap; + + regmap =3D devm_regmap_init_i3c(i3cdev, &mmc5633_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), + "Failed to register i3c regmap\n"); + + return mmc5633_common_probe(dev, regmap, "mmc5633_i3c", i3cdev); +} + +static struct i3c_driver mmc5633_i3c_driver =3D { + .driver =3D { + .name =3D "mmc5633_i3c", + }, + .probe =3D mmc5633_i3c_probe, + .id_table =3D mmc5633_i3c_ids, +}; + +module_i3c_i2c_driver(mmc5633_i3c_driver, &mmc5633_i2c_driver) + +MODULE_AUTHOR("Frank Li "); +MODULE_DESCRIPTION("MEMSIC MMC5633 magnetic sensor driver"); +MODULE_LICENSE("GPL"); --=20 2.34.1