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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org Add mmc5633 sensor basic support. - Support read 20 bits X/Y/Z magnetic. - Support I3C HDR mode to send start measurememt command. - Support I3C HDR mode to read all sensors data by one command. Co-developed-by: Carlos Song Signed-off-by: Carlos Song Co-developed-by: Adrian Fluturel Signed-off-by: Adrian Fluturel Signed-off-by: Frank Li --- change in v10 - align datasheet register name - remove reduntant regmap_attach_dev() - add missed \n at error message - move *regmap to first member. Changes in v9 - add time.h - remove dev from mmc5633_data - remove struct {val, val2} - regmap return value check use if (ret) ... - 1 -> ARRAY_SIZE() - use guard() replace scoped_guard() - use regmap stored dev - i3c device use bus assigned name. - use devm_kasprintf() to combine friend name with device ID from i3c bus and it will avoid build warning to discard const return from dev_name(). Change in v7 - add missed *.h file - remove reduntant empty line - add comments about delay 1us after SET - use USEC_PER_MSEC for timeout value Change in v6: - remove acpi part - return 0 for success path at mmc5633_write_raw Change in V4 - use { 1, 2000 } - Add _US for timeout - Use GEN_MASK for MMC5633_CTRL1_BW_MASK - Use { } for terminator. - remove !! - fix mix tab and space - add mmc5603 (merge https://lore.kernel.org/all/20251003000731.22927-1-fluturel.adrian@gmail.com/) - add tempature measure support 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 | 588 +++++++++++++++++++++++++++++++++++++ 3 files changed, 601 insertions(+) diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig index 81b812a29044e2b0b9ff84889c21aa3ebc20be35..cfb74a4a083630678a1db1132a14264de451a31a 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. +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/Makefile index dfe970fcacb8664b293af84893f7d3e3e8d7bf7e..5bd227f8c1204bdd8b8a43da180833eedca1457b 100644 --- a/drivers/iio/magnetometer/Makefile +++ b/drivers/iio/magnetometer/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_BMC150_MAGN_SPI) += bmc150_magn_spi.o obj-$(CONFIG_MAG3110) += mag3110.o obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o obj-$(CONFIG_MMC35240) += mmc35240.o +obj-$(CONFIG_MMC5633) += mmc5633.o obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn.o st_magn-y := st_magn_core.o diff --git a/drivers/iio/magnetometer/mmc5633.c b/drivers/iio/magnetometer/mmc5633.c new file mode 100644 index 0000000000000000000000000000000000000000..1bae6ffe3f18315ce079cb08c2286653cf71c9a4 --- /dev/null +++ b/drivers/iio/magnetometer/mmc5633.c @@ -0,0 +1,588 @@ +// 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MMC5633_REG_XOUT0 0x00 +#define MMC5633_REG_XOUT1 0x01 +#define MMC5633_REG_YOUT0 0x02 +#define MMC5633_REG_YOUT1 0x03 +#define MMC5633_REG_ZOUT0 0x04 +#define MMC5633_REG_ZOUT1 0x05 +#define MMC5633_REG_XOUT2 0x06 +#define MMC5633_REG_YOUT2 0x07 +#define MMC5633_REG_ZOUT2 0x08 +#define MMC5633_REG_TOUT 0x09 + +#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_T_DONE_BIT BIT(7) +#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_BW_MASK GENMASK(1, 0) + +#define MMC5633_WAIT_SET_RESET_US (1 * USEC_PER_MSEC) + +#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 { + MMC5633_AXIS_X, + MMC5633_AXIS_Y, + MMC5633_AXIS_Z, + MMC5633_TEMPERATURE, +}; + +struct mmc5633_data { + struct regmap *regmap; + struct i3c_device *i3cdev; + struct mutex mutex; /* protect to finish one whole measurement */ +}; + +int mmc5633_samp_freq[][2] = { + { 1, 200000 }, + { 2, 0 }, + { 3, 500000 }, + { 6, 600000 }, +}; + +#define MMC5633_CHANNEL(_axis) { \ + .type = IIO_MAGN, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## _axis, \ + .address = MMC5633_AXIS_ ## _axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_SCALE), \ +} + +static const struct iio_chan_spec mmc5633_channels[] = { + MMC5633_CHANNEL(X), + MMC5633_CHANNEL(Y), + MMC5633_CHANNEL(Z), + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + .address = MMC5633_TEMPERATURE, + }, +}; + +static int mmc5633_get_samp_freq_index(struct mmc5633_data *data, + int val, int val2) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(mmc5633_samp_freq); i++) + if (mmc5633_samp_freq[i][0] == val && + mmc5633_samp_freq[i][1] == val2) + return i; + return -EINVAL; +} + +static int mmc5633_init(struct mmc5633_data *data) +{ + unsigned int reg_id; + int ret; + + ret = regmap_read(data->regmap, MMC5633_REG_ID, ®_id); + if (ret) + return dev_err_probe(regmap_get_device(data->regmap), 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 = regmap_write(data->regmap, MMC5633_REG_CTRL0, MMC5633_CTRL0_SET); + if (ret) + return ret; + + /* + * Minimum time interval between SET or RESET to other operations is + * 1ms according to Operating Timing Diagram in datasheet. + */ + fsleep(MMC5633_WAIT_SET_RESET_US); + + ret = regmap_write(data->regmap, MMC5633_REG_CTRL0, MMC5633_CTRL0_RESET); + if (ret) + 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, int address) +{ + unsigned int reg_status; + int ret; + int val; + + val = (address == MMC5633_TEMPERATURE) ? MMC5633_CTRL0_MEAS_T : MMC5633_CTRL0_MEAS_M; + ret = regmap_write(data->regmap, MMC5633_REG_CTRL0, val); + if (ret < 0) + return ret; + + val = (address == MMC5633_TEMPERATURE) ? + MMC5633_STATUS1_MEAS_T_DONE_BIT : MMC5633_STATUS1_MEAS_M_DONE_BIT; + ret = regmap_read_poll_timeout(data->regmap, MMC5633_REG_STATUS1, reg_status, + reg_status & val, + 10 * USEC_PER_MSEC, + 100 * 10 * USEC_PER_MSEC); + if (ret) { + dev_err(regmap_get_device(data->regmap), "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, int address, void *buf, size_t sz) +{ + struct device *dev = regmap_get_device(data->regmap); + u8 data_cmd[2], status[2]; + int ret, val, ready; + + if (mmc5633_is_support_hdr(data)) { + struct i3c_xfer xfers_wr_cmd[] = { + { + .cmd = 0x3b, + .len = 2, + .data.out = data_cmd, + } + }; + struct i3c_xfer xfers_rd_sta_cmd[] = { + { + .cmd = 0x23 | BIT(7), /* RDSTA CMD */ + .len = 2, + .data.in = status, + }, + }; + struct i3c_xfer xfers_rd_data_cmd[] = { + { + .cmd = 0x22 | BIT(7), /* RDLONG CMD */ + .len = sz, + .data.in = buf, + }, + }; + + data_cmd[0] = 0; + data_cmd[1] = (address == MMC5633_TEMPERATURE) ? + MMC5633_HDR_CTRL0_MEAS_T : MMC5633_HDR_CTRL0_MEAS_M; + + ret = i3c_device_do_xfers(data->i3cdev, xfers_wr_cmd, + ARRAY_SIZE(xfers_wr_cmd), I3C_HDR_DDR); + if (ret < 0) + return ret; + + ready = (address == MMC5633_TEMPERATURE) ? + MMC5633_STATUS1_MEAS_T_DONE_BIT : MMC5633_STATUS1_MEAS_M_DONE_BIT; + ret = read_poll_timeout(i3c_device_do_xfers, val, + val || + status[0] & ready, + 10 * USEC_PER_MSEC, + 100 * 10 * USEC_PER_MSEC, 0, + data->i3cdev, xfers_rd_sta_cmd, + ARRAY_SIZE(xfers_rd_sta_cmd), I3C_HDR_DDR); + if (ret) { + dev_err(dev, "data not ready\n"); + return ret; + } + if (val) { + dev_err(dev, "i3c transfer error\n"); + return val; + } + return i3c_device_do_xfers(data->i3cdev, xfers_rd_data_cmd, + ARRAY_SIZE(xfers_rd_data_cmd), I3C_HDR_DDR); + } + + /* Fallback to use SDR/I2C mode */ + ret = mmc5633_take_measurement(data, address); + if (ret < 0) + return ret; + + if (address == MMC5633_TEMPERATURE) + /* + * Put tempeature to last byte of buff to align HDR case. + * I3C will early terminate data read if previous data is not + * available. + */ + return regmap_bulk_read(data->regmap, MMC5633_REG_TOUT, buf + sz - 1, 1); + + return regmap_bulk_read(data->regmap, MMC5633_REG_XOUT0, buf, sz); +} + +/* X,Y,Z 3 channels, each channel has 3 byte and TEMP */ +#define MMC5633_ALL_SIZE (3 * 3 + 1) + +static int mmc5633_get_raw(struct mmc5633_data *data, int index, unsigned char *buf, int *val) +{ + if (index == MMC5633_TEMPERATURE) { + *val = buf[MMC5633_ALL_SIZE - 1]; + return 0; + } + /* + * 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 = get_unaligned_be16(buf + 2 * index) << 4; + *val |= buf[index + 6] >> 4; + + return 0; +} + +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 = iio_priv(indio_dev); + char buf[MMC5633_ALL_SIZE]; + unsigned int reg, i; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + scoped_guard(mutex, &data->mutex) { + ret = mmc5633_read_measurement(data, chan->address, buf, MMC5633_ALL_SIZE); + if (ret < 0) + return ret; + } + + ret = mmc5633_get_raw(data, chan->address, buf, val); + if (ret < 0) + return ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (chan->type == IIO_MAGN) { + *val = 0; + *val2 = 62500; + } else { + *val = 0; + *val2 = 800000000; /* 0.8C */ + } + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + if (chan->type == IIO_TEMP) { + *val = -75; + return IIO_VAL_INT; + } + return -EINVAL; + case IIO_CHAN_INFO_SAMP_FREQ: + scoped_guard(mutex, &data->mutex) { + ret = regmap_read(data->regmap, MMC5633_REG_CTRL1, ®); + if (ret < 0) + return ret; + } + + i = FIELD_GET(MMC5633_CTRL1_BW_MASK, reg); + if (i >= ARRAY_SIZE(mmc5633_samp_freq)) + return -EINVAL; + + *val = mmc5633_samp_freq[i][0]; + *val2 = mmc5633_samp_freq[i][1]; + 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 = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = mmc5633_get_samp_freq_index(data, val, val2); + if (ret < 0) + return ret; + + guard(mutex)(&data->mutex); + + return regmap_update_bits(data->regmap, MMC5633_REG_CTRL1, + MMC5633_CTRL1_BW_MASK, + FIELD_PREP(MMC5633_CTRL1_BW_MASK, 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 = (const int *)mmc5633_samp_freq; + *length = ARRAY_SIZE(mmc5633_samp_freq) * 2; + *type = IIO_VAL_INT_PLUS_MICRO; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + +static const struct iio_info mmc5633_info = { + .read_raw = mmc5633_read_raw, + .write_raw = mmc5633_write_raw, + .read_avail = 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_XOUT0: + case MMC5633_REG_XOUT1: + case MMC5633_REG_YOUT0: + case MMC5633_REG_YOUT1: + case MMC5633_REG_ZOUT0: + case MMC5633_REG_ZOUT1: + case MMC5633_REG_XOUT2: + case MMC5633_REG_YOUT2: + case MMC5633_REG_ZOUT2: + case MMC5633_REG_TOUT: + 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[] = { + { MMC5633_REG_CTRL0, 0x00 }, + { MMC5633_REG_CTRL1, 0x00 }, +}; + +static const struct regmap_config mmc5633_regmap_config = { + .name = "mmc5633_regmap", + + .reg_bits = 8, + .val_bits = 8, + + .max_register = MMC5633_REG_ID, + .cache_type = REGCACHE_MAPLE, + + .writeable_reg = mmc5633_is_writeable_reg, + .readable_reg = mmc5633_is_readable_reg, + .volatile_reg = mmc5633_is_volatile_reg, + + .reg_defaults = mmc5633_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(mmc5633_reg_defaults), +}; + +static int mmc5633_common_probe(struct regmap *regmap, char *name, + struct i3c_device *i3cdev) +{ + struct device *dev = regmap_get_device(regmap); + struct mmc5633_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + + data->regmap = regmap; + data->i3cdev = i3cdev; + + ret = devm_mutex_init(dev, &data->mutex); + if (ret) + return ret; + + indio_dev->info = &mmc5633_info; + indio_dev->name = name; + indio_dev->channels = mmc5633_channels; + indio_dev->num_channels = ARRAY_SIZE(mmc5633_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = 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 regmap *regmap = dev_get_regmap(dev, NULL); + + regcache_cache_only(regmap, true); + + return 0; +} + +static int mmc5633_resume(struct device *dev) +{ + struct regmap *regmap = dev_get_regmap(dev, NULL); + int ret; + + regcache_mark_dirty(regmap); + ret = regcache_sync_region(regmap, MMC5633_REG_CTRL0, MMC5633_REG_CTRL1); + if (ret) + dev_err(dev, "Failed to restore control registers\n"); + + regcache_cache_only(regmap, false); + + return 0; +} + +static int mmc5633_i2c_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(client, &mmc5633_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "regmap init failed\n"); + + return mmc5633_common_probe(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[] = { + { .compatible = "memsic,mmc5603" }, + { .compatible = "memsic,mmc5633" }, + { } +}; +MODULE_DEVICE_TABLE(of, mmc5633_of_match); + +static const struct i2c_device_id mmc5633_i2c_id[] = { + { "mmc5603" }, + { "mmc5633" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mmc5633_i2c_id); + +static struct i2c_driver mmc5633_i2c_driver = { + .driver = { + .name = "mmc5633_i2c", + .of_match_table = mmc5633_of_match, + .pm = pm_sleep_ptr(&mmc5633_pm_ops), + }, + .probe = mmc5633_i2c_probe, + .id_table = mmc5633_i2c_id, +}; + +static const struct i3c_device_id mmc5633_i3c_ids[] = { + I3C_DEVICE(0x0251, 0x0000, NULL), + { } +}; +MODULE_DEVICE_TABLE(i3c, mmc5633_i3c_ids); + +static int mmc5633_i3c_probe(struct i3c_device *i3cdev) +{ + struct device *dev = i3cdev_to_dev(i3cdev); + struct regmap *regmap; + char *name; + + name = devm_kasprintf(dev, GFP_KERNEL, "mmc5633(%s)", dev_name(dev)); + if (!name) + return -ENOMEM; + + regmap = 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(regmap, name, i3cdev); +} + +static struct i3c_driver mmc5633_i3c_driver = { + .driver = { + .name = "mmc5633_i3c", + }, + .probe = mmc5633_i3c_probe, + .id_table = 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"); -- 2.34.1 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c