| Message ID | 20171206095454.8150-1-cmo@melexis.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, 6 Dec 2017 10:54:54 +0100 Crt Mori <cmo@melexis.com> wrote: > Melexis has just released Infra Red temperature sensor MLX90632 used > for contact-less temperature measurement. Driver provides basic > functionality for reporting object (and ambient) temperature with > support for object emissivity. > > Signed-off-by: Crt Mori <cmo@melexis.com> Sorry for my rant / review earlier - thought I was looking at V3. oops ;) Anyhow, much better. A few of the comments from there still apply though and I'm out of time to port them over to this version today, so I hope you don't mind fishing them out of that review. Jonathan > --- > MAINTAINERS | 7 + > drivers/iio/temperature/Kconfig | 12 + > drivers/iio/temperature/Makefile | 1 + > drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++ > 4 files changed, 807 insertions(+) > create mode 100644 drivers/iio/temperature/mlx90632.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 2d3d750b19c0..81aec02b08b8 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -8690,6 +8690,13 @@ W: http://www.melexis.com > S: Supported > F: drivers/iio/temperature/mlx90614.c > > +MELEXIS MLX90632 DRIVER > +M: Crt Mori <cmo@melexis.com> > +L: linux-iio@vger.kernel.org > +W: http://www.melexis.com > +S: Supported > +F: drivers/iio/temperature/mlx90632.c > + > MELFAS MIP4 TOUCHSCREEN DRIVER > M: Sangwon Jee <jeesw@melfas.com> > W: http://www.melfas.com > diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig > index 5378976d6d27..82e4a62745e2 100644 > --- a/drivers/iio/temperature/Kconfig > +++ b/drivers/iio/temperature/Kconfig > @@ -43,6 +43,18 @@ config MLX90614 > This driver can also be built as a module. If so, the module will > be called mlx90614. > > +config MLX90632 > + tristate "MLX90632 contact-less infrared sensor with medical accuracy" > + depends on I2C > + select REGMAP_I2C > + help > + If you say yes here you get support for the Melexis > + MLX90632 contact-less infrared sensor with medical accuracy > + connected with I2C. > + > + This driver can also be built as a module. If so, the module will > + be called mlx90632. > + > config TMP006 > tristate "TMP006 infrared thermopile sensor" > depends on I2C > diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile > index ad1d668de546..44644fe01bc9 100644 > --- a/drivers/iio/temperature/Makefile > +++ b/drivers/iio/temperature/Makefile > @@ -5,6 +5,7 @@ > obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o > obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o > obj-$(CONFIG_MLX90614) += mlx90614.o > +obj-$(CONFIG_MLX90632) += mlx90632.o > obj-$(CONFIG_TMP006) += tmp006.o > obj-$(CONFIG_TMP007) += tmp007.o > obj-$(CONFIG_TSYS01) += tsys01.o > diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c > new file mode 100644 > index 000000000000..74c23b69f9dc > --- /dev/null > +++ b/drivers/iio/temperature/mlx90632.c > @@ -0,0 +1,787 @@ > +/* > + * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor > + * > + * Copyright (c) 2017 Melexis <cmo@melexis.com> > + * > + * This file is subject to the terms and conditions of version 2 of > + * the GNU General Public License. See the file COPYING in the main > + * directory of this archive for more details. > + * > + * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor > + */ > +#include <linux/delay.h> > +#include <linux/err.h> > +#include <linux/gpio/consumer.h> > +#include <linux/i2c.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/math64.h> > +#include <linux/of.h> > +#include <linux/pm_runtime.h> > +#include <linux/regmap.h> > + > +#include <linux/iio/iio.h> > +#include <linux/iio/sysfs.h> > + > +/* Memory sections addresses */ > +#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */ > +#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */ > + > +/* EEPROM addresses - used at startup */ > +#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */ > +#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */ > +#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */ > +#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */ > +#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */ > +#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */ > +#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */ > +#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */ > +#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */ > +#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */ > +#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */ > +#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */ > +#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */ > +#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */ > +#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */ > +#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */ > +#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */ > +#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */ > +#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */ > +#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */ > + > +#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */ > +#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */ > + > +#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */ > +#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */ > + > +/* Register addresses - volatile */ > +#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */ > + > +/* Control register address - volatile */ > +#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */ > +#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */ > +/* PowerModes statuses */ > +#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1) > +#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */ > +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/ > +#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */ > +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/ > + > +/* Device status register - volatile */ > +#define MLX90632_REG_STATUS 0x3fff /* Device status register */ > +#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */ > +#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */ > +#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */ > +#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */ > +#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */ > + > +/* RAM_MEAS address-es for each channel */ > +#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num) > +#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1) > +#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2) > + > +/* Magic constants */ > +#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */ > +#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */ > +#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */ > +#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */ > +#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */ > +#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */ > +#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */ > +#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */ > + > +struct mlx90632_data { > + struct i2c_client *client; > + struct mutex lock; /* Multiple reads for single measurement */ > + struct regmap *regmap; > + u16 emissivity; > +}; > + > +static const struct regmap_range mlx90632_volatile_reg_range[] = { > + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), > + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), > + regmap_reg_range(MLX90632_RAM_1(0), > + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), > +}; > + > +static const struct regmap_access_table mlx90632_volatile_regs_tbl = { > + .yes_ranges = mlx90632_volatile_reg_range, > + .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range), > +}; > + > +static const struct regmap_range mlx90632_read_reg_range[] = { > + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), > + regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR), > + regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb), > + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), > + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), > + regmap_reg_range(MLX90632_RAM_1(0), > + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), > +}; > + > +static const struct regmap_access_table mlx90632_readable_regs_tbl = { > + .yes_ranges = mlx90632_read_reg_range, > + .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range), > +}; > + > +static const struct regmap_range mlx90632_no_write_reg_range[] = { > + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), > + regmap_reg_range(MLX90632_RAM_1(0), > + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), > +}; > + > +static const struct regmap_access_table mlx90632_writeable_regs_tbl = { > + .no_ranges = mlx90632_no_write_reg_range, > + .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range), > +}; > + > +static const struct regmap_config mlx90632_regmap = { > + .reg_bits = 16, > + .val_bits = 16, > + > + .volatile_table = &mlx90632_volatile_regs_tbl, > + .rd_table = &mlx90632_readable_regs_tbl, > + .wr_table = &mlx90632_writeable_regs_tbl, > + > + .use_single_rw = true, > + .reg_format_endian = REGMAP_ENDIAN_BIG, > + .val_format_endian = REGMAP_ENDIAN_BIG, > + .cache_type = REGCACHE_RBTREE, > +}; > + > +static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap) > +{ > + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, > + MLX90632_CFG_PWR_MASK, > + MLX90632_PWR_STATUS_SLEEP_STEP); > +} > + > +static s32 mlx90632_pwr_continuous(struct regmap *regmap) > +{ > + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, > + MLX90632_CFG_PWR_MASK, > + MLX90632_PWR_STATUS_CONTINUOUS); > +} > + > +/** > + * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle > + * @*data: pointer to mlx90632_data object containing regmap information > + * > + * Perform a measurement and return latest measurement cycle position reported > + * by sensor. This is a blocking function for 500ms, as that is default sensor > + * refresh rate. > + */ > +static int mlx90632_perform_measurement(struct mlx90632_data *data) > +{ > + int ret, tries = 100; > + unsigned int reg_status; > + > + ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS, > + MLX90632_STAT_DATA_RDY, 0); > + if (ret < 0) > + return ret; > + > + while (tries-- > 0) { > + ret = regmap_read(data->regmap, MLX90632_REG_STATUS, > + ®_status); > + if (ret < 0) > + return ret; > + if (reg_status & MLX90632_STAT_DATA_RDY) > + break; > + usleep_range(10000, 11000); > + } > + > + if (tries < 0) { > + dev_err(&data->client->dev, "data not ready"); > + return -ETIMEDOUT; > + } > + > + return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2; > +} > + > +static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new, > + uint8_t *channel_old) > +{ > + switch (perform_ret) { > + case 1: > + *channel_new = 1; > + *channel_old = 2; > + break; > + case 2: > + *channel_new = 2; > + *channel_old = 1; > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int mlx90632_read_ambient_raw(struct regmap *regmap, > + s16 *ambient_new_raw, s16 *ambient_old_raw) > +{ > + int ret; > + unsigned int read_tmp; > + > + ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp); > + if (ret < 0) > + return ret; > + *ambient_new_raw = (s16)read_tmp; > + > + ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp); > + if (ret < 0) > + return ret; > + *ambient_old_raw = (s16)read_tmp; > + > + return ret; > +} > + > +static int mlx90632_read_object_raw(struct regmap *regmap, > + int perform_measurement_ret, > + s16 *object_new_raw, s16 *object_old_raw) > +{ > + int ret; > + unsigned int read_tmp; > + s16 read; > + u8 channel = 0; > + u8 channel_old = 0; > + > + ret = mlx90632_channel_new_select(perform_measurement_ret, &channel, > + &channel_old); > + if (ret != 0) > + return ret; > + > + ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp); > + if (ret < 0) > + return ret; > + > + read = (s16)read_tmp; > + > + ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp); > + if (ret < 0) > + return ret; > + *object_new_raw = (read + (s16)read_tmp) / 2; > + > + ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp); > + if (ret < 0) > + return ret; > + read = (s16)read_tmp; > + > + ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp); > + if (ret < 0) > + return ret; > + *object_old_raw = (read + (s16)read_tmp) / 2; > + > + return ret; > +} > + > +static int mlx90632_read_all_channel(struct mlx90632_data *data, > + s16 *ambient_new_raw, s16 *ambient_old_raw, > + s16 *object_new_raw, s16 *object_old_raw) > +{ > + s32 ret, measurement; > + > + mutex_lock(&data->lock); > + measurement = mlx90632_perform_measurement(data); > + if (measurement < 0) { > + ret = measurement; > + goto read_unlock; > + } > + ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw, > + ambient_old_raw); > + if (ret < 0) > + goto read_unlock; > + > + ret = mlx90632_read_object_raw(data->regmap, measurement, > + object_new_raw, object_old_raw); > +read_unlock: > + mutex_unlock(&data->lock); > + return ret; > +} > + > +static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb, > + s32 *reg_value) > +{ > + s32 ret; > + unsigned int read; > + u32 value; > + > + ret = regmap_read(regmap, reg_lsb, &read); > + if (ret < 0) > + return ret; > + > + value = read; > + > + ret = regmap_read(regmap, reg_lsb + 1, &read); > + if (ret < 0) > + return ret; > + > + *reg_value = (read << 16) | (value & 0xffff); > + > + return 0; > +} > + > +static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw, > + s16 ambient_old_raw, s16 Gb) > +{ > + s64 VR_Ta, kGb, tmp; > + > + kGb = ((s64)Gb * 1000LL) >> 10ULL; > + VR_Ta = (s64)ambient_old_raw * 1000000LL + > + kGb * div64_s64(((s64)ambient_new_raw * 1000LL), > + (MLX90632_REF_3)); > + tmp = div64_s64( > + div64_s64(((s64)ambient_new_raw * 1000000000000LL), > + (MLX90632_REF_3)), VR_Ta); > + return div64_s64(tmp << 19ULL, 1000LL); > +} > + > +static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw, > + s16 ambient_new_raw, > + s16 ambient_old_raw, s16 Ka) > +{ > + s64 VR_IR, kKa, tmp; > + > + kKa = ((s64)Ka * 1000LL) >> 10ULL; > + VR_IR = (s64)ambient_old_raw * 1000000LL + > + kKa * div64_s64(((s64)ambient_new_raw * 1000LL), > + (MLX90632_REF_3)); > + tmp = div64_s64( > + div64_s64(((s64)((object_new_raw + object_old_raw) / 2) > + * 1000000000000LL), (MLX90632_REF_12)), > + VR_IR); > + return div64_s64((tmp << 19ULL), 1000LL); > +} > + > +static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw, > + s32 P_T, s32 P_R, s32 P_G, s32 P_O, > + s16 Gb) > +{ > + s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum; > + > + AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw, > + Gb); > + Asub = ((s64)P_T * 10000000000LL) >> 44ULL; > + Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL); > + Ablock = Asub * (Bsub * Bsub); > + Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL; > + Cblock = ((s64)P_O * 10000000000LL) >> 8ULL; > + > + sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock; > + > + return div64_s64(sum, 10000000LL); > +} > + > +static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object, > + s64 TAdut, s32 Fa, s32 Fb, > + s32 Ga, s16 Ha, s16 Hb, > + u16 emissivity) > +{ > + s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr; > + s64 Ha_customer, Hb_customer; > + > + Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL; > + Hb_customer = ((s64)Hb * 100) >> 10ULL; > + > + calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL) > + * 1000LL)) >> 36LL; > + calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL; > + Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL) > + * Ha_customer), 1000LL); > + Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA)); > + Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL); > + Alpha_corr = div64_s64(Alpha_corr, 1000LL); > + ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr); > + TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) * > + (div64_s64(TAdut, 10000LL) + 27315) * > + (div64_s64(TAdut, 10000LL) + 27315) * > + (div64_s64(TAdut, 10000LL) + 27315); > + > + return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4)) > + - 27315 - Hb_customer) * 10; > +} > + > +static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb, > + s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb, > + u16 tmp_emi) > +{ > + s64 kTA, kTA0, TAdut; > + s64 temp = 25000; > + s8 i; > + > + kTA = (Ea * 1000LL) >> 16LL; > + kTA0 = (Eb * 1000LL) >> 8LL; > + TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL; > + > + /* Iterations of calculation as described in datasheet */ > + for (i = 0; i < 5; ++i) { > + temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, > + Fa, Fb, Ga, Ha, Hb, > + tmp_emi); > + } > + return temp; > +} > + > +static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val) > +{ > + s32 ret; > + s32 Ea, Eb, Fa, Fb, Ga; > + unsigned int read_tmp; > + s16 Ha, Hb, Gb, Ka; > + s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw; > + s64 object, ambient; > + > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga); > + if (ret < 0) > + return ret; > + ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp); > + if (ret < 0) > + return ret; > + Ha = (s16)read_tmp; > + ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp); > + if (ret < 0) > + return ret; > + Hb = (s16)read_tmp; > + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); > + if (ret < 0) > + return ret; > + Gb = (s16)read_tmp; > + ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp); > + if (ret < 0) > + return ret; > + Ka = (s16)read_tmp; > + > + ret = mlx90632_read_all_channel(data, > + &ambient_new_raw, &ambient_old_raw, > + &object_new_raw, &object_old_raw); > + if (ret < 0) > + return ret; > + > + ambient = mlx90632_preprocess_temp_amb(ambient_new_raw, > + ambient_old_raw, Gb); > + object = mlx90632_preprocess_temp_obj(object_new_raw, > + object_old_raw, > + ambient_new_raw, > + ambient_old_raw, Ka); > + > + *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga, > + Ha, Hb, data->emissivity); > + return 0; > +} > + > +static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val) > +{ > + s32 ret; > + unsigned int read_tmp; > + s32 PT, PR, PG, PO; > + s16 Gb; > + s16 ambient_new_raw, ambient_old_raw; > + > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT); > + if (ret < 0) > + return ret; > + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO); > + if (ret < 0) > + return ret; > + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); > + if (ret < 0) > + return ret; > + Gb = (s16)read_tmp; > + > + ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw, > + &ambient_old_raw); > + *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw, > + PT, PR, PG, PO, Gb); > + return ret; > +} > + > +static int mlx90632_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *channel, int *val, > + int *val2, long mask) > +{ > + struct mlx90632_data *data = iio_priv(indio_dev); > + int ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_PROCESSED: > + switch (channel->channel2) { > + case IIO_MOD_TEMP_AMBIENT: > + ret = mlx90632_calc_ambient_dsp105(data, val); > + if (ret < 0) > + return ret; > + return IIO_VAL_INT; > + case IIO_MOD_TEMP_OBJECT: > + ret = mlx90632_calc_object_dsp105(data, val); > + if (ret < 0) > + return ret; > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > + case IIO_CHAN_INFO_CALIBEMISSIVITY: > + if (data->emissivity == 1000) { > + *val = 1; > + *val2 = 0; > + } else { > + *val = 0; > + *val2 = data->emissivity * 1000; > + } > + return IIO_VAL_INT_PLUS_MICRO; > + > + default: > + return -EINVAL; > + } > +} > + > +static int mlx90632_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *channel, int val, > + int val2, long mask) > +{ > + struct mlx90632_data *data = iio_priv(indio_dev); > + > + switch (mask) { > + case IIO_CHAN_INFO_CALIBEMISSIVITY: > + /* Confirm we are within 0 and 1.0 */ > + if (val < 0 || val2 < 0 || val > 1 || > + (val == 1 && val2 != 0)) > + return -EINVAL; > + data->emissivity = val * 1000 + val2 / 1000; > + return 0; > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_chan_spec mlx90632_channels[] = { > + { > + .type = IIO_TEMP, > + .modified = 1, > + .channel2 = IIO_MOD_TEMP_AMBIENT, > + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), > + }, > + { > + .type = IIO_TEMP, > + .modified = 1, > + .channel2 = IIO_MOD_TEMP_OBJECT, > + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | > + BIT(IIO_CHAN_INFO_CALIBEMISSIVITY), > + }, > +}; > + > +static const struct iio_info mlx90632_info = { > + .read_raw = mlx90632_read_raw, > + .write_raw = mlx90632_write_raw, > +}; > + > +#ifdef CONFIG_PM > +static int mlx90632_sleep(struct mlx90632_data *data) > +{ > + dev_dbg(&data->client->dev, "Requesting sleep"); > + return mlx90632_pwr_set_sleep_step(data->regmap); > +} > + > +static int mlx90632_wakeup(struct mlx90632_data *data) > +{ > + dev_dbg(&data->client->dev, "Requesting wake-up"); > + return mlx90632_pwr_continuous(data->regmap); > +} > +#endif > + > +static int mlx90632_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct iio_dev *indio_dev; > + struct mlx90632_data *mlx90632; > + struct regmap *regmap; > + int ret; > + unsigned int read; > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632)); > + if (!indio_dev) { > + dev_err(&client->dev, "Failed to allocate device"); > + return -ENOMEM; > + } > + > + regmap = devm_regmap_init_i2c(client, &mlx90632_regmap); > + if (IS_ERR(regmap)) { > + ret = PTR_ERR(regmap); > + dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret); > + return ret; > + } > + > + mlx90632 = iio_priv(indio_dev); > + i2c_set_clientdata(client, indio_dev); > + mlx90632->client = client; > + mlx90632->regmap = regmap; > + > + mutex_init(&mlx90632->lock); > + mlx90632_wakeup(mlx90632); > + > + indio_dev->dev.parent = &client->dev; > + indio_dev->name = id->name; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->info = &mlx90632_info; > + indio_dev->channels = mlx90632_channels; > + indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels); > + > + ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read); > + if (ret < 0) { > + dev_err(&client->dev, "read of version failed: %d\n", ret); > + return ret; > + } > + /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */ > + if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) { > + dev_dbg(&client->dev, > + "Detected Medical EEPROM calibration %x", read); > + } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) { > + dev_dbg(&client->dev, > + "Detected Consumer EEPROM calibration %x", read); > + } else { > + dev_err(&client->dev, > + "Chip EEPROM version mismatch %x (expected %x)", > + read, MLX90632_EEPROM_VERSION); > + return -EPROTONOSUPPORT; > + } > + > + mlx90632->emissivity = 1000; > + > + return iio_device_register(indio_dev); > +} > + > +static int mlx90632_remove(struct i2c_client *client) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct mlx90632_data *data = iio_priv(indio_dev); > + > + iio_device_unregister(indio_dev); > + > + pm_runtime_disable(&client->dev); > + if (!pm_runtime_status_suspended(&client->dev)) > + mlx90632_sleep(data); > + pm_runtime_set_suspended(&client->dev); > + > + return 0; > +} > + > +static const struct i2c_device_id mlx90632_id[] = { > + { "mlx90632", 0 }, > + { } > +}; > +MODULE_DEVICE_TABLE(i2c, mlx90632_id); > + > +static const struct of_device_id mlx90632_of_match[] = { > + { .compatible = "melexis,mlx90632" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, mlx90632_of_match); > + > +#ifdef CONFIG_PM_SLEEP > +static int mlx90632_pm_suspend(struct device *dev) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mlx90632_data *data = iio_priv(indio_dev); > + > + regcache_sync(data->regmap); > + > + if (pm_runtime_active(dev)) > + return mlx90632_sleep(data); > + > + return 0; > +} > + > +static int mlx90632_pm_resume(struct device *dev) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mlx90632_data *data = iio_priv(indio_dev); > + int err; > + > + regcache_mark_dirty(data->regmap); > + regcache_cache_only(data->regmap, false); > + err = regcache_sync(data->regmap); > + if (err < 0) { > + dev_err(dev, "Failed to sync regmap registers: %d\n", err); > + return err; > + } > + > + err = mlx90632_wakeup(data); > + if (err < 0) > + return err; > + > + pm_runtime_disable(dev); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev); > + > + return 0; > +} > +#endif > + > +#ifdef CONFIG_PM > +static int mlx90632_pm_runtime_suspend(struct device *dev) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); > + > + regcache_sync(mlx90632->regmap); > + > + return mlx90632_sleep(mlx90632); > +} > + > +static int mlx90632_pm_runtime_resume(struct device *dev) > +{ > + s32 ret; > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); > + > + regcache_mark_dirty(mlx90632->regmap); > + regcache_cache_only(mlx90632->regmap, false); > + ret = regcache_sync(mlx90632->regmap); > + if (ret < 0) { > + dev_err(dev, "Failed to sync regmap registers: %d\n", ret); > + return ret; > + } > + > + return mlx90632_wakeup(mlx90632); > +} > +#endif > + > +static const struct dev_pm_ops mlx90632_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume) > + SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, > + mlx90632_pm_runtime_resume, NULL) > +}; > + > +static struct i2c_driver mlx90632_driver = { > + .driver = { > + .name = "mlx90632", > + .of_match_table = mlx90632_of_match, > + .pm = &mlx90632_pm_ops, > + }, > + .probe = mlx90632_probe, > + .remove = mlx90632_remove, > + .id_table = mlx90632_id, > +}; > +module_i2c_driver(mlx90632_driver); > + > +MODULE_AUTHOR("Crt Mori <cmo@melexis.com>"); > +MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver"); > +MODULE_LICENSE("GPL v2"); -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Jonathan, I have adjusted per your request even other remaining bits. I hope pm is now looking as it should. Thanks for noticing that there is no register in the datasheet (sometimes internal knowledge gets in the way of such things). I have reordered patches as well (details in cover letter). I think v4 should be final, so make sure you review it ;) Best regards, Crt On 10 December 2017 at 20:43, Jonathan Cameron <jic23@kernel.org> wrote: > On Wed, 6 Dec 2017 10:54:54 +0100 > Crt Mori <cmo@melexis.com> wrote: > >> Melexis has just released Infra Red temperature sensor MLX90632 used >> for contact-less temperature measurement. Driver provides basic >> functionality for reporting object (and ambient) temperature with >> support for object emissivity. >> >> Signed-off-by: Crt Mori <cmo@melexis.com> > Sorry for my rant / review earlier - thought I was looking at V3. oops ;) > > Anyhow, much better. A few of the comments from there still apply though > and I'm out of time to port them over to this version today, so I hope > you don't mind fishing them out of that review. > > Jonathan >> --- >> MAINTAINERS | 7 + >> drivers/iio/temperature/Kconfig | 12 + >> drivers/iio/temperature/Makefile | 1 + >> drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++ >> 4 files changed, 807 insertions(+) >> create mode 100644 drivers/iio/temperature/mlx90632.c >> >> diff --git a/MAINTAINERS b/MAINTAINERS >> index 2d3d750b19c0..81aec02b08b8 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -8690,6 +8690,13 @@ W: http://www.melexis.com >> S: Supported >> F: drivers/iio/temperature/mlx90614.c >> >> +MELEXIS MLX90632 DRIVER >> +M: Crt Mori <cmo@melexis.com> >> +L: linux-iio@vger.kernel.org >> +W: http://www.melexis.com >> +S: Supported >> +F: drivers/iio/temperature/mlx90632.c >> + >> MELFAS MIP4 TOUCHSCREEN DRIVER >> M: Sangwon Jee <jeesw@melfas.com> >> W: http://www.melfas.com >> diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig >> index 5378976d6d27..82e4a62745e2 100644 >> --- a/drivers/iio/temperature/Kconfig >> +++ b/drivers/iio/temperature/Kconfig >> @@ -43,6 +43,18 @@ config MLX90614 >> This driver can also be built as a module. If so, the module will >> be called mlx90614. >> >> +config MLX90632 >> + tristate "MLX90632 contact-less infrared sensor with medical accuracy" >> + depends on I2C >> + select REGMAP_I2C >> + help >> + If you say yes here you get support for the Melexis >> + MLX90632 contact-less infrared sensor with medical accuracy >> + connected with I2C. >> + >> + This driver can also be built as a module. If so, the module will >> + be called mlx90632. >> + >> config TMP006 >> tristate "TMP006 infrared thermopile sensor" >> depends on I2C >> diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile >> index ad1d668de546..44644fe01bc9 100644 >> --- a/drivers/iio/temperature/Makefile >> +++ b/drivers/iio/temperature/Makefile >> @@ -5,6 +5,7 @@ >> obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o >> obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o >> obj-$(CONFIG_MLX90614) += mlx90614.o >> +obj-$(CONFIG_MLX90632) += mlx90632.o >> obj-$(CONFIG_TMP006) += tmp006.o >> obj-$(CONFIG_TMP007) += tmp007.o >> obj-$(CONFIG_TSYS01) += tsys01.o >> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c >> new file mode 100644 >> index 000000000000..74c23b69f9dc >> --- /dev/null >> +++ b/drivers/iio/temperature/mlx90632.c >> @@ -0,0 +1,787 @@ >> +/* >> + * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor >> + * >> + * Copyright (c) 2017 Melexis <cmo@melexis.com> >> + * >> + * This file is subject to the terms and conditions of version 2 of >> + * the GNU General Public License. See the file COPYING in the main >> + * directory of this archive for more details. >> + * >> + * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor >> + */ >> +#include <linux/delay.h> >> +#include <linux/err.h> >> +#include <linux/gpio/consumer.h> >> +#include <linux/i2c.h> >> +#include <linux/kernel.h> >> +#include <linux/module.h> >> +#include <linux/math64.h> >> +#include <linux/of.h> >> +#include <linux/pm_runtime.h> >> +#include <linux/regmap.h> >> + >> +#include <linux/iio/iio.h> >> +#include <linux/iio/sysfs.h> >> + >> +/* Memory sections addresses */ >> +#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */ >> +#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */ >> + >> +/* EEPROM addresses - used at startup */ >> +#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */ >> +#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */ >> +#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */ >> +#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */ >> +#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */ >> +#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */ >> +#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */ >> +#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */ >> +#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */ >> +#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */ >> +#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */ >> +#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */ >> +#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */ >> +#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */ >> +#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */ >> +#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */ >> +#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */ >> +#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */ >> +#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */ >> +#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */ >> + >> +#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */ >> +#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */ >> + >> +#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */ >> +#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */ >> + >> +/* Register addresses - volatile */ >> +#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */ >> + >> +/* Control register address - volatile */ >> +#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */ >> +#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */ >> +/* PowerModes statuses */ >> +#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1) >> +#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */ >> +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/ >> +#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */ >> +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/ >> + >> +/* Device status register - volatile */ >> +#define MLX90632_REG_STATUS 0x3fff /* Device status register */ >> +#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */ >> +#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */ >> +#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */ >> +#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */ >> +#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */ >> + >> +/* RAM_MEAS address-es for each channel */ >> +#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num) >> +#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1) >> +#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2) >> + >> +/* Magic constants */ >> +#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */ >> +#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */ >> +#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */ >> +#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */ >> +#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */ >> +#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */ >> +#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */ >> +#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */ >> + >> +struct mlx90632_data { >> + struct i2c_client *client; >> + struct mutex lock; /* Multiple reads for single measurement */ >> + struct regmap *regmap; >> + u16 emissivity; >> +}; >> + >> +static const struct regmap_range mlx90632_volatile_reg_range[] = { >> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), >> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), >> + regmap_reg_range(MLX90632_RAM_1(0), >> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), >> +}; >> + >> +static const struct regmap_access_table mlx90632_volatile_regs_tbl = { >> + .yes_ranges = mlx90632_volatile_reg_range, >> + .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range), >> +}; >> + >> +static const struct regmap_range mlx90632_read_reg_range[] = { >> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), >> + regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR), >> + regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb), >> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), >> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), >> + regmap_reg_range(MLX90632_RAM_1(0), >> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), >> +}; >> + >> +static const struct regmap_access_table mlx90632_readable_regs_tbl = { >> + .yes_ranges = mlx90632_read_reg_range, >> + .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range), >> +}; >> + >> +static const struct regmap_range mlx90632_no_write_reg_range[] = { >> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), >> + regmap_reg_range(MLX90632_RAM_1(0), >> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), >> +}; >> + >> +static const struct regmap_access_table mlx90632_writeable_regs_tbl = { >> + .no_ranges = mlx90632_no_write_reg_range, >> + .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range), >> +}; >> + >> +static const struct regmap_config mlx90632_regmap = { >> + .reg_bits = 16, >> + .val_bits = 16, >> + >> + .volatile_table = &mlx90632_volatile_regs_tbl, >> + .rd_table = &mlx90632_readable_regs_tbl, >> + .wr_table = &mlx90632_writeable_regs_tbl, >> + >> + .use_single_rw = true, >> + .reg_format_endian = REGMAP_ENDIAN_BIG, >> + .val_format_endian = REGMAP_ENDIAN_BIG, >> + .cache_type = REGCACHE_RBTREE, >> +}; >> + >> +static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap) >> +{ >> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, >> + MLX90632_CFG_PWR_MASK, >> + MLX90632_PWR_STATUS_SLEEP_STEP); >> +} >> + >> +static s32 mlx90632_pwr_continuous(struct regmap *regmap) >> +{ >> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, >> + MLX90632_CFG_PWR_MASK, >> + MLX90632_PWR_STATUS_CONTINUOUS); >> +} >> + >> +/** >> + * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle >> + * @*data: pointer to mlx90632_data object containing regmap information >> + * >> + * Perform a measurement and return latest measurement cycle position reported >> + * by sensor. This is a blocking function for 500ms, as that is default sensor >> + * refresh rate. >> + */ >> +static int mlx90632_perform_measurement(struct mlx90632_data *data) >> +{ >> + int ret, tries = 100; >> + unsigned int reg_status; >> + >> + ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS, >> + MLX90632_STAT_DATA_RDY, 0); >> + if (ret < 0) >> + return ret; >> + >> + while (tries-- > 0) { >> + ret = regmap_read(data->regmap, MLX90632_REG_STATUS, >> + ®_status); >> + if (ret < 0) >> + return ret; >> + if (reg_status & MLX90632_STAT_DATA_RDY) >> + break; >> + usleep_range(10000, 11000); >> + } >> + >> + if (tries < 0) { >> + dev_err(&data->client->dev, "data not ready"); >> + return -ETIMEDOUT; >> + } >> + >> + return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2; >> +} >> + >> +static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new, >> + uint8_t *channel_old) >> +{ >> + switch (perform_ret) { >> + case 1: >> + *channel_new = 1; >> + *channel_old = 2; >> + break; >> + case 2: >> + *channel_new = 2; >> + *channel_old = 1; >> + break; >> + default: >> + return -EINVAL; >> + } >> + >> + return 0; >> +} >> + >> +static int mlx90632_read_ambient_raw(struct regmap *regmap, >> + s16 *ambient_new_raw, s16 *ambient_old_raw) >> +{ >> + int ret; >> + unsigned int read_tmp; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp); >> + if (ret < 0) >> + return ret; >> + *ambient_new_raw = (s16)read_tmp; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp); >> + if (ret < 0) >> + return ret; >> + *ambient_old_raw = (s16)read_tmp; >> + >> + return ret; >> +} >> + >> +static int mlx90632_read_object_raw(struct regmap *regmap, >> + int perform_measurement_ret, >> + s16 *object_new_raw, s16 *object_old_raw) >> +{ >> + int ret; >> + unsigned int read_tmp; >> + s16 read; >> + u8 channel = 0; >> + u8 channel_old = 0; >> + >> + ret = mlx90632_channel_new_select(perform_measurement_ret, &channel, >> + &channel_old); >> + if (ret != 0) >> + return ret; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp); >> + if (ret < 0) >> + return ret; >> + >> + read = (s16)read_tmp; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp); >> + if (ret < 0) >> + return ret; >> + *object_new_raw = (read + (s16)read_tmp) / 2; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp); >> + if (ret < 0) >> + return ret; >> + read = (s16)read_tmp; >> + >> + ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp); >> + if (ret < 0) >> + return ret; >> + *object_old_raw = (read + (s16)read_tmp) / 2; >> + >> + return ret; >> +} >> + >> +static int mlx90632_read_all_channel(struct mlx90632_data *data, >> + s16 *ambient_new_raw, s16 *ambient_old_raw, >> + s16 *object_new_raw, s16 *object_old_raw) >> +{ >> + s32 ret, measurement; >> + >> + mutex_lock(&data->lock); >> + measurement = mlx90632_perform_measurement(data); >> + if (measurement < 0) { >> + ret = measurement; >> + goto read_unlock; >> + } >> + ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw, >> + ambient_old_raw); >> + if (ret < 0) >> + goto read_unlock; >> + >> + ret = mlx90632_read_object_raw(data->regmap, measurement, >> + object_new_raw, object_old_raw); >> +read_unlock: >> + mutex_unlock(&data->lock); >> + return ret; >> +} >> + >> +static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb, >> + s32 *reg_value) >> +{ >> + s32 ret; >> + unsigned int read; >> + u32 value; >> + >> + ret = regmap_read(regmap, reg_lsb, &read); >> + if (ret < 0) >> + return ret; >> + >> + value = read; >> + >> + ret = regmap_read(regmap, reg_lsb + 1, &read); >> + if (ret < 0) >> + return ret; >> + >> + *reg_value = (read << 16) | (value & 0xffff); >> + >> + return 0; >> +} >> + >> +static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw, >> + s16 ambient_old_raw, s16 Gb) >> +{ >> + s64 VR_Ta, kGb, tmp; >> + >> + kGb = ((s64)Gb * 1000LL) >> 10ULL; >> + VR_Ta = (s64)ambient_old_raw * 1000000LL + >> + kGb * div64_s64(((s64)ambient_new_raw * 1000LL), >> + (MLX90632_REF_3)); >> + tmp = div64_s64( >> + div64_s64(((s64)ambient_new_raw * 1000000000000LL), >> + (MLX90632_REF_3)), VR_Ta); >> + return div64_s64(tmp << 19ULL, 1000LL); >> +} >> + >> +static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw, >> + s16 ambient_new_raw, >> + s16 ambient_old_raw, s16 Ka) >> +{ >> + s64 VR_IR, kKa, tmp; >> + >> + kKa = ((s64)Ka * 1000LL) >> 10ULL; >> + VR_IR = (s64)ambient_old_raw * 1000000LL + >> + kKa * div64_s64(((s64)ambient_new_raw * 1000LL), >> + (MLX90632_REF_3)); >> + tmp = div64_s64( >> + div64_s64(((s64)((object_new_raw + object_old_raw) / 2) >> + * 1000000000000LL), (MLX90632_REF_12)), >> + VR_IR); >> + return div64_s64((tmp << 19ULL), 1000LL); >> +} >> + >> +static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw, >> + s32 P_T, s32 P_R, s32 P_G, s32 P_O, >> + s16 Gb) >> +{ >> + s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum; >> + >> + AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw, >> + Gb); >> + Asub = ((s64)P_T * 10000000000LL) >> 44ULL; >> + Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL); >> + Ablock = Asub * (Bsub * Bsub); >> + Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL; >> + Cblock = ((s64)P_O * 10000000000LL) >> 8ULL; >> + >> + sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock; >> + >> + return div64_s64(sum, 10000000LL); >> +} >> + >> +static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object, >> + s64 TAdut, s32 Fa, s32 Fb, >> + s32 Ga, s16 Ha, s16 Hb, >> + u16 emissivity) >> +{ >> + s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr; >> + s64 Ha_customer, Hb_customer; >> + >> + Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL; >> + Hb_customer = ((s64)Hb * 100) >> 10ULL; >> + >> + calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL) >> + * 1000LL)) >> 36LL; >> + calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL; >> + Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL) >> + * Ha_customer), 1000LL); >> + Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA)); >> + Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL); >> + Alpha_corr = div64_s64(Alpha_corr, 1000LL); >> + ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr); >> + TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) * >> + (div64_s64(TAdut, 10000LL) + 27315) * >> + (div64_s64(TAdut, 10000LL) + 27315) * >> + (div64_s64(TAdut, 10000LL) + 27315); >> + >> + return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4)) >> + - 27315 - Hb_customer) * 10; >> +} >> + >> +static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb, >> + s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb, >> + u16 tmp_emi) >> +{ >> + s64 kTA, kTA0, TAdut; >> + s64 temp = 25000; >> + s8 i; >> + >> + kTA = (Ea * 1000LL) >> 16LL; >> + kTA0 = (Eb * 1000LL) >> 8LL; >> + TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL; >> + >> + /* Iterations of calculation as described in datasheet */ >> + for (i = 0; i < 5; ++i) { >> + temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, >> + Fa, Fb, Ga, Ha, Hb, >> + tmp_emi); >> + } >> + return temp; >> +} >> + >> +static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val) >> +{ >> + s32 ret; >> + s32 Ea, Eb, Fa, Fb, Ga; >> + unsigned int read_tmp; >> + s16 Ha, Hb, Gb, Ka; >> + s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw; >> + s64 object, ambient; >> + >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga); >> + if (ret < 0) >> + return ret; >> + ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp); >> + if (ret < 0) >> + return ret; >> + Ha = (s16)read_tmp; >> + ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp); >> + if (ret < 0) >> + return ret; >> + Hb = (s16)read_tmp; >> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); >> + if (ret < 0) >> + return ret; >> + Gb = (s16)read_tmp; >> + ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp); >> + if (ret < 0) >> + return ret; >> + Ka = (s16)read_tmp; >> + >> + ret = mlx90632_read_all_channel(data, >> + &ambient_new_raw, &ambient_old_raw, >> + &object_new_raw, &object_old_raw); >> + if (ret < 0) >> + return ret; >> + >> + ambient = mlx90632_preprocess_temp_amb(ambient_new_raw, >> + ambient_old_raw, Gb); >> + object = mlx90632_preprocess_temp_obj(object_new_raw, >> + object_old_raw, >> + ambient_new_raw, >> + ambient_old_raw, Ka); >> + >> + *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga, >> + Ha, Hb, data->emissivity); >> + return 0; >> +} >> + >> +static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val) >> +{ >> + s32 ret; >> + unsigned int read_tmp; >> + s32 PT, PR, PG, PO; >> + s16 Gb; >> + s16 ambient_new_raw, ambient_old_raw; >> + >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT); >> + if (ret < 0) >> + return ret; >> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO); >> + if (ret < 0) >> + return ret; >> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); >> + if (ret < 0) >> + return ret; >> + Gb = (s16)read_tmp; >> + >> + ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw, >> + &ambient_old_raw); >> + *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw, >> + PT, PR, PG, PO, Gb); >> + return ret; >> +} >> + >> +static int mlx90632_read_raw(struct iio_dev *indio_dev, >> + struct iio_chan_spec const *channel, int *val, >> + int *val2, long mask) >> +{ >> + struct mlx90632_data *data = iio_priv(indio_dev); >> + int ret; >> + >> + switch (mask) { >> + case IIO_CHAN_INFO_PROCESSED: >> + switch (channel->channel2) { >> + case IIO_MOD_TEMP_AMBIENT: >> + ret = mlx90632_calc_ambient_dsp105(data, val); >> + if (ret < 0) >> + return ret; >> + return IIO_VAL_INT; >> + case IIO_MOD_TEMP_OBJECT: >> + ret = mlx90632_calc_object_dsp105(data, val); >> + if (ret < 0) >> + return ret; >> + return IIO_VAL_INT; >> + default: >> + return -EINVAL; >> + } >> + case IIO_CHAN_INFO_CALIBEMISSIVITY: >> + if (data->emissivity == 1000) { >> + *val = 1; >> + *val2 = 0; >> + } else { >> + *val = 0; >> + *val2 = data->emissivity * 1000; >> + } >> + return IIO_VAL_INT_PLUS_MICRO; >> + >> + default: >> + return -EINVAL; >> + } >> +} >> + >> +static int mlx90632_write_raw(struct iio_dev *indio_dev, >> + struct iio_chan_spec const *channel, int val, >> + int val2, long mask) >> +{ >> + struct mlx90632_data *data = iio_priv(indio_dev); >> + >> + switch (mask) { >> + case IIO_CHAN_INFO_CALIBEMISSIVITY: >> + /* Confirm we are within 0 and 1.0 */ >> + if (val < 0 || val2 < 0 || val > 1 || >> + (val == 1 && val2 != 0)) >> + return -EINVAL; >> + data->emissivity = val * 1000 + val2 / 1000; >> + return 0; >> + default: >> + return -EINVAL; >> + } >> +} >> + >> +static const struct iio_chan_spec mlx90632_channels[] = { >> + { >> + .type = IIO_TEMP, >> + .modified = 1, >> + .channel2 = IIO_MOD_TEMP_AMBIENT, >> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), >> + }, >> + { >> + .type = IIO_TEMP, >> + .modified = 1, >> + .channel2 = IIO_MOD_TEMP_OBJECT, >> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | >> + BIT(IIO_CHAN_INFO_CALIBEMISSIVITY), >> + }, >> +}; >> + >> +static const struct iio_info mlx90632_info = { >> + .read_raw = mlx90632_read_raw, >> + .write_raw = mlx90632_write_raw, >> +}; >> + >> +#ifdef CONFIG_PM >> +static int mlx90632_sleep(struct mlx90632_data *data) >> +{ >> + dev_dbg(&data->client->dev, "Requesting sleep"); >> + return mlx90632_pwr_set_sleep_step(data->regmap); >> +} >> + >> +static int mlx90632_wakeup(struct mlx90632_data *data) >> +{ >> + dev_dbg(&data->client->dev, "Requesting wake-up"); >> + return mlx90632_pwr_continuous(data->regmap); >> +} >> +#endif >> + >> +static int mlx90632_probe(struct i2c_client *client, >> + const struct i2c_device_id *id) >> +{ >> + struct iio_dev *indio_dev; >> + struct mlx90632_data *mlx90632; >> + struct regmap *regmap; >> + int ret; >> + unsigned int read; >> + >> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632)); >> + if (!indio_dev) { >> + dev_err(&client->dev, "Failed to allocate device"); >> + return -ENOMEM; >> + } >> + >> + regmap = devm_regmap_init_i2c(client, &mlx90632_regmap); >> + if (IS_ERR(regmap)) { >> + ret = PTR_ERR(regmap); >> + dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret); >> + return ret; >> + } >> + >> + mlx90632 = iio_priv(indio_dev); >> + i2c_set_clientdata(client, indio_dev); >> + mlx90632->client = client; >> + mlx90632->regmap = regmap; >> + >> + mutex_init(&mlx90632->lock); >> + mlx90632_wakeup(mlx90632); >> + >> + indio_dev->dev.parent = &client->dev; >> + indio_dev->name = id->name; >> + indio_dev->modes = INDIO_DIRECT_MODE; >> + indio_dev->info = &mlx90632_info; >> + indio_dev->channels = mlx90632_channels; >> + indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels); >> + >> + ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read); >> + if (ret < 0) { >> + dev_err(&client->dev, "read of version failed: %d\n", ret); >> + return ret; >> + } >> + /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */ >> + if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) { >> + dev_dbg(&client->dev, >> + "Detected Medical EEPROM calibration %x", read); >> + } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) { >> + dev_dbg(&client->dev, >> + "Detected Consumer EEPROM calibration %x", read); >> + } else { >> + dev_err(&client->dev, >> + "Chip EEPROM version mismatch %x (expected %x)", >> + read, MLX90632_EEPROM_VERSION); >> + return -EPROTONOSUPPORT; >> + } >> + >> + mlx90632->emissivity = 1000; >> + >> + return iio_device_register(indio_dev); >> +} >> + >> +static int mlx90632_remove(struct i2c_client *client) >> +{ >> + struct iio_dev *indio_dev = i2c_get_clientdata(client); >> + struct mlx90632_data *data = iio_priv(indio_dev); >> + >> + iio_device_unregister(indio_dev); >> + >> + pm_runtime_disable(&client->dev); >> + if (!pm_runtime_status_suspended(&client->dev)) >> + mlx90632_sleep(data); >> + pm_runtime_set_suspended(&client->dev); >> + >> + return 0; >> +} >> + >> +static const struct i2c_device_id mlx90632_id[] = { >> + { "mlx90632", 0 }, >> + { } >> +}; >> +MODULE_DEVICE_TABLE(i2c, mlx90632_id); >> + >> +static const struct of_device_id mlx90632_of_match[] = { >> + { .compatible = "melexis,mlx90632" }, >> + { } >> +}; >> +MODULE_DEVICE_TABLE(of, mlx90632_of_match); >> + >> +#ifdef CONFIG_PM_SLEEP >> +static int mlx90632_pm_suspend(struct device *dev) >> +{ >> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); >> + struct mlx90632_data *data = iio_priv(indio_dev); >> + >> + regcache_sync(data->regmap); >> + >> + if (pm_runtime_active(dev)) >> + return mlx90632_sleep(data); >> + >> + return 0; >> +} >> + >> +static int mlx90632_pm_resume(struct device *dev) >> +{ >> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); >> + struct mlx90632_data *data = iio_priv(indio_dev); >> + int err; >> + >> + regcache_mark_dirty(data->regmap); >> + regcache_cache_only(data->regmap, false); >> + err = regcache_sync(data->regmap); >> + if (err < 0) { >> + dev_err(dev, "Failed to sync regmap registers: %d\n", err); >> + return err; >> + } >> + >> + err = mlx90632_wakeup(data); >> + if (err < 0) >> + return err; >> + >> + pm_runtime_disable(dev); >> + pm_runtime_set_active(dev); >> + pm_runtime_enable(dev); >> + >> + return 0; >> +} >> +#endif >> + >> +#ifdef CONFIG_PM >> +static int mlx90632_pm_runtime_suspend(struct device *dev) >> +{ >> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); >> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); >> + >> + regcache_sync(mlx90632->regmap); >> + >> + return mlx90632_sleep(mlx90632); >> +} >> + >> +static int mlx90632_pm_runtime_resume(struct device *dev) >> +{ >> + s32 ret; >> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); >> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); >> + >> + regcache_mark_dirty(mlx90632->regmap); >> + regcache_cache_only(mlx90632->regmap, false); >> + ret = regcache_sync(mlx90632->regmap); >> + if (ret < 0) { >> + dev_err(dev, "Failed to sync regmap registers: %d\n", ret); >> + return ret; >> + } >> + >> + return mlx90632_wakeup(mlx90632); >> +} >> +#endif >> + >> +static const struct dev_pm_ops mlx90632_pm_ops = { >> + SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume) >> + SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, >> + mlx90632_pm_runtime_resume, NULL) >> +}; >> + >> +static struct i2c_driver mlx90632_driver = { >> + .driver = { >> + .name = "mlx90632", >> + .of_match_table = mlx90632_of_match, >> + .pm = &mlx90632_pm_ops, >> + }, >> + .probe = mlx90632_probe, >> + .remove = mlx90632_remove, >> + .id_table = mlx90632_id, >> +}; >> +module_i2c_driver(mlx90632_driver); >> + >> +MODULE_AUTHOR("Crt Mori <cmo@melexis.com>"); >> +MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver"); >> +MODULE_LICENSE("GPL v2"); > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/MAINTAINERS b/MAINTAINERS index 2d3d750b19c0..81aec02b08b8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8690,6 +8690,13 @@ W: http://www.melexis.com S: Supported F: drivers/iio/temperature/mlx90614.c +MELEXIS MLX90632 DRIVER +M: Crt Mori <cmo@melexis.com> +L: linux-iio@vger.kernel.org +W: http://www.melexis.com +S: Supported +F: drivers/iio/temperature/mlx90632.c + MELFAS MIP4 TOUCHSCREEN DRIVER M: Sangwon Jee <jeesw@melfas.com> W: http://www.melfas.com diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig index 5378976d6d27..82e4a62745e2 100644 --- a/drivers/iio/temperature/Kconfig +++ b/drivers/iio/temperature/Kconfig @@ -43,6 +43,18 @@ config MLX90614 This driver can also be built as a module. If so, the module will be called mlx90614. +config MLX90632 + tristate "MLX90632 contact-less infrared sensor with medical accuracy" + depends on I2C + select REGMAP_I2C + help + If you say yes here you get support for the Melexis + MLX90632 contact-less infrared sensor with medical accuracy + connected with I2C. + + This driver can also be built as a module. If so, the module will + be called mlx90632. + config TMP006 tristate "TMP006 infrared thermopile sensor" depends on I2C diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile index ad1d668de546..44644fe01bc9 100644 --- a/drivers/iio/temperature/Makefile +++ b/drivers/iio/temperature/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o obj-$(CONFIG_MLX90614) += mlx90614.o +obj-$(CONFIG_MLX90632) += mlx90632.o obj-$(CONFIG_TMP006) += tmp006.o obj-$(CONFIG_TMP007) += tmp007.o obj-$(CONFIG_TSYS01) += tsys01.o diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c new file mode 100644 index 000000000000..74c23b69f9dc --- /dev/null +++ b/drivers/iio/temperature/mlx90632.c @@ -0,0 +1,787 @@ +/* + * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor + * + * Copyright (c) 2017 Melexis <cmo@melexis.com> + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + * + * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor + */ +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/math64.h> +#include <linux/of.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +/* Memory sections addresses */ +#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */ +#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */ + +/* EEPROM addresses - used at startup */ +#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */ +#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */ +#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */ +#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */ +#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */ +#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */ +#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */ +#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */ +#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */ +#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */ +#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */ +#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */ +#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */ +#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */ +#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */ +#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */ +#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */ +#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */ +#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */ +#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */ + +#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */ +#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */ + +#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */ +#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */ + +/* Register addresses - volatile */ +#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */ + +/* Control register address - volatile */ +#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */ +#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */ +/* PowerModes statuses */ +#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1) +#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */ +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/ +#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */ +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/ + +/* Device status register - volatile */ +#define MLX90632_REG_STATUS 0x3fff /* Device status register */ +#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */ +#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */ +#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */ +#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */ +#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */ + +/* RAM_MEAS address-es for each channel */ +#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num) +#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1) +#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2) + +/* Magic constants */ +#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */ +#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */ +#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */ +#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */ +#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */ +#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */ +#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */ +#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */ + +struct mlx90632_data { + struct i2c_client *client; + struct mutex lock; /* Multiple reads for single measurement */ + struct regmap *regmap; + u16 emissivity; +}; + +static const struct regmap_range mlx90632_volatile_reg_range[] = { + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), + regmap_reg_range(MLX90632_RAM_1(0), + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), +}; + +static const struct regmap_access_table mlx90632_volatile_regs_tbl = { + .yes_ranges = mlx90632_volatile_reg_range, + .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range), +}; + +static const struct regmap_range mlx90632_read_reg_range[] = { + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), + regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR), + regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb), + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR), + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS), + regmap_reg_range(MLX90632_RAM_1(0), + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), +}; + +static const struct regmap_access_table mlx90632_readable_regs_tbl = { + .yes_ranges = mlx90632_read_reg_range, + .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range), +}; + +static const struct regmap_range mlx90632_no_write_reg_range[] = { + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka), + regmap_reg_range(MLX90632_RAM_1(0), + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)), +}; + +static const struct regmap_access_table mlx90632_writeable_regs_tbl = { + .no_ranges = mlx90632_no_write_reg_range, + .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range), +}; + +static const struct regmap_config mlx90632_regmap = { + .reg_bits = 16, + .val_bits = 16, + + .volatile_table = &mlx90632_volatile_regs_tbl, + .rd_table = &mlx90632_readable_regs_tbl, + .wr_table = &mlx90632_writeable_regs_tbl, + + .use_single_rw = true, + .reg_format_endian = REGMAP_ENDIAN_BIG, + .val_format_endian = REGMAP_ENDIAN_BIG, + .cache_type = REGCACHE_RBTREE, +}; + +static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap) +{ + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, + MLX90632_CFG_PWR_MASK, + MLX90632_PWR_STATUS_SLEEP_STEP); +} + +static s32 mlx90632_pwr_continuous(struct regmap *regmap) +{ + return regmap_update_bits(regmap, MLX90632_REG_CONTROL, + MLX90632_CFG_PWR_MASK, + MLX90632_PWR_STATUS_CONTINUOUS); +} + +/** + * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle + * @*data: pointer to mlx90632_data object containing regmap information + * + * Perform a measurement and return latest measurement cycle position reported + * by sensor. This is a blocking function for 500ms, as that is default sensor + * refresh rate. + */ +static int mlx90632_perform_measurement(struct mlx90632_data *data) +{ + int ret, tries = 100; + unsigned int reg_status; + + ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS, + MLX90632_STAT_DATA_RDY, 0); + if (ret < 0) + return ret; + + while (tries-- > 0) { + ret = regmap_read(data->regmap, MLX90632_REG_STATUS, + ®_status); + if (ret < 0) + return ret; + if (reg_status & MLX90632_STAT_DATA_RDY) + break; + usleep_range(10000, 11000); + } + + if (tries < 0) { + dev_err(&data->client->dev, "data not ready"); + return -ETIMEDOUT; + } + + return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2; +} + +static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new, + uint8_t *channel_old) +{ + switch (perform_ret) { + case 1: + *channel_new = 1; + *channel_old = 2; + break; + case 2: + *channel_new = 2; + *channel_old = 1; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int mlx90632_read_ambient_raw(struct regmap *regmap, + s16 *ambient_new_raw, s16 *ambient_old_raw) +{ + int ret; + unsigned int read_tmp; + + ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp); + if (ret < 0) + return ret; + *ambient_new_raw = (s16)read_tmp; + + ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp); + if (ret < 0) + return ret; + *ambient_old_raw = (s16)read_tmp; + + return ret; +} + +static int mlx90632_read_object_raw(struct regmap *regmap, + int perform_measurement_ret, + s16 *object_new_raw, s16 *object_old_raw) +{ + int ret; + unsigned int read_tmp; + s16 read; + u8 channel = 0; + u8 channel_old = 0; + + ret = mlx90632_channel_new_select(perform_measurement_ret, &channel, + &channel_old); + if (ret != 0) + return ret; + + ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp); + if (ret < 0) + return ret; + + read = (s16)read_tmp; + + ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp); + if (ret < 0) + return ret; + *object_new_raw = (read + (s16)read_tmp) / 2; + + ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp); + if (ret < 0) + return ret; + read = (s16)read_tmp; + + ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp); + if (ret < 0) + return ret; + *object_old_raw = (read + (s16)read_tmp) / 2; + + return ret; +} + +static int mlx90632_read_all_channel(struct mlx90632_data *data, + s16 *ambient_new_raw, s16 *ambient_old_raw, + s16 *object_new_raw, s16 *object_old_raw) +{ + s32 ret, measurement; + + mutex_lock(&data->lock); + measurement = mlx90632_perform_measurement(data); + if (measurement < 0) { + ret = measurement; + goto read_unlock; + } + ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw, + ambient_old_raw); + if (ret < 0) + goto read_unlock; + + ret = mlx90632_read_object_raw(data->regmap, measurement, + object_new_raw, object_old_raw); +read_unlock: + mutex_unlock(&data->lock); + return ret; +} + +static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb, + s32 *reg_value) +{ + s32 ret; + unsigned int read; + u32 value; + + ret = regmap_read(regmap, reg_lsb, &read); + if (ret < 0) + return ret; + + value = read; + + ret = regmap_read(regmap, reg_lsb + 1, &read); + if (ret < 0) + return ret; + + *reg_value = (read << 16) | (value & 0xffff); + + return 0; +} + +static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw, + s16 ambient_old_raw, s16 Gb) +{ + s64 VR_Ta, kGb, tmp; + + kGb = ((s64)Gb * 1000LL) >> 10ULL; + VR_Ta = (s64)ambient_old_raw * 1000000LL + + kGb * div64_s64(((s64)ambient_new_raw * 1000LL), + (MLX90632_REF_3)); + tmp = div64_s64( + div64_s64(((s64)ambient_new_raw * 1000000000000LL), + (MLX90632_REF_3)), VR_Ta); + return div64_s64(tmp << 19ULL, 1000LL); +} + +static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw, + s16 ambient_new_raw, + s16 ambient_old_raw, s16 Ka) +{ + s64 VR_IR, kKa, tmp; + + kKa = ((s64)Ka * 1000LL) >> 10ULL; + VR_IR = (s64)ambient_old_raw * 1000000LL + + kKa * div64_s64(((s64)ambient_new_raw * 1000LL), + (MLX90632_REF_3)); + tmp = div64_s64( + div64_s64(((s64)((object_new_raw + object_old_raw) / 2) + * 1000000000000LL), (MLX90632_REF_12)), + VR_IR); + return div64_s64((tmp << 19ULL), 1000LL); +} + +static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw, + s32 P_T, s32 P_R, s32 P_G, s32 P_O, + s16 Gb) +{ + s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum; + + AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw, + Gb); + Asub = ((s64)P_T * 10000000000LL) >> 44ULL; + Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL); + Ablock = Asub * (Bsub * Bsub); + Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL; + Cblock = ((s64)P_O * 10000000000LL) >> 8ULL; + + sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock; + + return div64_s64(sum, 10000000LL); +} + +static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object, + s64 TAdut, s32 Fa, s32 Fb, + s32 Ga, s16 Ha, s16 Hb, + u16 emissivity) +{ + s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr; + s64 Ha_customer, Hb_customer; + + Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL; + Hb_customer = ((s64)Hb * 100) >> 10ULL; + + calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL) + * 1000LL)) >> 36LL; + calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL; + Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL) + * Ha_customer), 1000LL); + Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA)); + Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL); + Alpha_corr = div64_s64(Alpha_corr, 1000LL); + ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr); + TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) * + (div64_s64(TAdut, 10000LL) + 27315) * + (div64_s64(TAdut, 10000LL) + 27315) * + (div64_s64(TAdut, 10000LL) + 27315); + + return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4)) + - 27315 - Hb_customer) * 10; +} + +static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb, + s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb, + u16 tmp_emi) +{ + s64 kTA, kTA0, TAdut; + s64 temp = 25000; + s8 i; + + kTA = (Ea * 1000LL) >> 16LL; + kTA0 = (Eb * 1000LL) >> 8LL; + TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL; + + /* Iterations of calculation as described in datasheet */ + for (i = 0; i < 5; ++i) { + temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, + Fa, Fb, Ga, Ha, Hb, + tmp_emi); + } + return temp; +} + +static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val) +{ + s32 ret; + s32 Ea, Eb, Fa, Fb, Ga; + unsigned int read_tmp; + s16 Ha, Hb, Gb, Ka; + s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw; + s64 object, ambient; + + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga); + if (ret < 0) + return ret; + ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp); + if (ret < 0) + return ret; + Ha = (s16)read_tmp; + ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp); + if (ret < 0) + return ret; + Hb = (s16)read_tmp; + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); + if (ret < 0) + return ret; + Gb = (s16)read_tmp; + ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp); + if (ret < 0) + return ret; + Ka = (s16)read_tmp; + + ret = mlx90632_read_all_channel(data, + &ambient_new_raw, &ambient_old_raw, + &object_new_raw, &object_old_raw); + if (ret < 0) + return ret; + + ambient = mlx90632_preprocess_temp_amb(ambient_new_raw, + ambient_old_raw, Gb); + object = mlx90632_preprocess_temp_obj(object_new_raw, + object_old_raw, + ambient_new_raw, + ambient_old_raw, Ka); + + *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga, + Ha, Hb, data->emissivity); + return 0; +} + +static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val) +{ + s32 ret; + unsigned int read_tmp; + s32 PT, PR, PG, PO; + s16 Gb; + s16 ambient_new_raw, ambient_old_raw; + + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT); + if (ret < 0) + return ret; + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO); + if (ret < 0) + return ret; + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp); + if (ret < 0) + return ret; + Gb = (s16)read_tmp; + + ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw, + &ambient_old_raw); + *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw, + PT, PR, PG, PO, Gb); + return ret; +} + +static int mlx90632_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int *val, + int *val2, long mask) +{ + struct mlx90632_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + switch (channel->channel2) { + case IIO_MOD_TEMP_AMBIENT: + ret = mlx90632_calc_ambient_dsp105(data, val); + if (ret < 0) + return ret; + return IIO_VAL_INT; + case IIO_MOD_TEMP_OBJECT: + ret = mlx90632_calc_object_dsp105(data, val); + if (ret < 0) + return ret; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_CALIBEMISSIVITY: + if (data->emissivity == 1000) { + *val = 1; + *val2 = 0; + } else { + *val = 0; + *val2 = data->emissivity * 1000; + } + return IIO_VAL_INT_PLUS_MICRO; + + default: + return -EINVAL; + } +} + +static int mlx90632_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int val, + int val2, long mask) +{ + struct mlx90632_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_CALIBEMISSIVITY: + /* Confirm we are within 0 and 1.0 */ + if (val < 0 || val2 < 0 || val > 1 || + (val == 1 && val2 != 0)) + return -EINVAL; + data->emissivity = val * 1000 + val2 / 1000; + return 0; + default: + return -EINVAL; + } +} + +static const struct iio_chan_spec mlx90632_channels[] = { + { + .type = IIO_TEMP, + .modified = 1, + .channel2 = IIO_MOD_TEMP_AMBIENT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + }, + { + .type = IIO_TEMP, + .modified = 1, + .channel2 = IIO_MOD_TEMP_OBJECT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_CALIBEMISSIVITY), + }, +}; + +static const struct iio_info mlx90632_info = { + .read_raw = mlx90632_read_raw, + .write_raw = mlx90632_write_raw, +}; + +#ifdef CONFIG_PM +static int mlx90632_sleep(struct mlx90632_data *data) +{ + dev_dbg(&data->client->dev, "Requesting sleep"); + return mlx90632_pwr_set_sleep_step(data->regmap); +} + +static int mlx90632_wakeup(struct mlx90632_data *data) +{ + dev_dbg(&data->client->dev, "Requesting wake-up"); + return mlx90632_pwr_continuous(data->regmap); +} +#endif + +static int mlx90632_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct mlx90632_data *mlx90632; + struct regmap *regmap; + int ret; + unsigned int read; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632)); + if (!indio_dev) { + dev_err(&client->dev, "Failed to allocate device"); + return -ENOMEM; + } + + regmap = devm_regmap_init_i2c(client, &mlx90632_regmap); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret); + return ret; + } + + mlx90632 = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + mlx90632->client = client; + mlx90632->regmap = regmap; + + mutex_init(&mlx90632->lock); + mlx90632_wakeup(mlx90632); + + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &mlx90632_info; + indio_dev->channels = mlx90632_channels; + indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels); + + ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read); + if (ret < 0) { + dev_err(&client->dev, "read of version failed: %d\n", ret); + return ret; + } + /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */ + if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) { + dev_dbg(&client->dev, + "Detected Medical EEPROM calibration %x", read); + } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) { + dev_dbg(&client->dev, + "Detected Consumer EEPROM calibration %x", read); + } else { + dev_err(&client->dev, + "Chip EEPROM version mismatch %x (expected %x)", + read, MLX90632_EEPROM_VERSION); + return -EPROTONOSUPPORT; + } + + mlx90632->emissivity = 1000; + + return iio_device_register(indio_dev); +} + +static int mlx90632_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct mlx90632_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + mlx90632_sleep(data); + pm_runtime_set_suspended(&client->dev); + + return 0; +} + +static const struct i2c_device_id mlx90632_id[] = { + { "mlx90632", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mlx90632_id); + +static const struct of_device_id mlx90632_of_match[] = { + { .compatible = "melexis,mlx90632" }, + { } +}; +MODULE_DEVICE_TABLE(of, mlx90632_of_match); + +#ifdef CONFIG_PM_SLEEP +static int mlx90632_pm_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mlx90632_data *data = iio_priv(indio_dev); + + regcache_sync(data->regmap); + + if (pm_runtime_active(dev)) + return mlx90632_sleep(data); + + return 0; +} + +static int mlx90632_pm_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mlx90632_data *data = iio_priv(indio_dev); + int err; + + regcache_mark_dirty(data->regmap); + regcache_cache_only(data->regmap, false); + err = regcache_sync(data->regmap); + if (err < 0) { + dev_err(dev, "Failed to sync regmap registers: %d\n", err); + return err; + } + + err = mlx90632_wakeup(data); + if (err < 0) + return err; + + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + return 0; +} +#endif + +#ifdef CONFIG_PM +static int mlx90632_pm_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); + + regcache_sync(mlx90632->regmap); + + return mlx90632_sleep(mlx90632); +} + +static int mlx90632_pm_runtime_resume(struct device *dev) +{ + s32 ret; + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct mlx90632_data *mlx90632 = iio_priv(indio_dev); + + regcache_mark_dirty(mlx90632->regmap); + regcache_cache_only(mlx90632->regmap, false); + ret = regcache_sync(mlx90632->regmap); + if (ret < 0) { + dev_err(dev, "Failed to sync regmap registers: %d\n", ret); + return ret; + } + + return mlx90632_wakeup(mlx90632); +} +#endif + +static const struct dev_pm_ops mlx90632_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume) + SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, + mlx90632_pm_runtime_resume, NULL) +}; + +static struct i2c_driver mlx90632_driver = { + .driver = { + .name = "mlx90632", + .of_match_table = mlx90632_of_match, + .pm = &mlx90632_pm_ops, + }, + .probe = mlx90632_probe, + .remove = mlx90632_remove, + .id_table = mlx90632_id, +}; +module_i2c_driver(mlx90632_driver); + +MODULE_AUTHOR("Crt Mori <cmo@melexis.com>"); +MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver"); +MODULE_LICENSE("GPL v2");
Melexis has just released Infra Red temperature sensor MLX90632 used for contact-less temperature measurement. Driver provides basic functionality for reporting object (and ambient) temperature with support for object emissivity. Signed-off-by: Crt Mori <cmo@melexis.com> --- MAINTAINERS | 7 + drivers/iio/temperature/Kconfig | 12 + drivers/iio/temperature/Makefile | 1 + drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++ 4 files changed, 807 insertions(+) create mode 100644 drivers/iio/temperature/mlx90632.c