1348 lines
38 KiB
C
1348 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* mlx90632.c - Melexis MLX90632 contactless IR temperature sensor
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*
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* Copyright (c) 2017 Melexis <cmo@melexis.com>
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*
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* Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
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*/
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#include <linux/bitfield.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/iopoll.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/limits.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/math64.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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/* Memory sections addresses */
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#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */
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#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */
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/* EEPROM addresses - used at startup */
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#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */
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#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */
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#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */
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#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */
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#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */
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#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */
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#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */
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#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */
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#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */
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#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */
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#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */
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#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */
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#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */
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#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */
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#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */
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#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */
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#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */
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#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */
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#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */
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#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */
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#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */
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#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */
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#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
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#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
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#define MLX90632_EE_MEDICAL_MEAS1 0x24E1 /* Medical measurement 1 16bit */
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#define MLX90632_EE_MEDICAL_MEAS2 0x24E2 /* Medical measurement 2 16bit */
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#define MLX90632_EE_EXTENDED_MEAS1 0x24F1 /* Extended measurement 1 16bit */
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#define MLX90632_EE_EXTENDED_MEAS2 0x24F2 /* Extended measurement 2 16bit */
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#define MLX90632_EE_EXTENDED_MEAS3 0x24F3 /* Extended measurement 3 16bit */
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/* Register addresses - volatile */
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#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
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/* Control register address - volatile */
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#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
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#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
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#define MLX90632_CFG_MTYP_MASK GENMASK(8, 4) /* Meas select Mask */
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#define MLX90632_CFG_SOB_MASK BIT(11)
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/* PowerModes statuses */
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#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
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#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
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#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step */
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#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
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#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
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#define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
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#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val)
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/* Extract Refresh Rate from ee register */
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#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8)
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/* Measurement types */
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#define MLX90632_MTYP_MEDICAL 0
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#define MLX90632_MTYP_EXTENDED 17
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/* Measurement type select*/
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#define MLX90632_MTYP_STATUS(ctrl_val) (ctrl_val << 4)
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#define MLX90632_MTYP_STATUS_MEDICAL MLX90632_MTYP_STATUS(MLX90632_MTYP_MEDICAL)
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#define MLX90632_MTYP_STATUS_EXTENDED MLX90632_MTYP_STATUS(MLX90632_MTYP_EXTENDED)
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/* I2C command register - volatile */
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#define MLX90632_REG_I2C_CMD 0x3005 /* I2C command Register address */
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/* Device status register - volatile */
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#define MLX90632_REG_STATUS 0x3fff /* Device status register */
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#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */
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#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */
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#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */
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#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */
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#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */
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/* RAM_MEAS address-es for each channel */
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#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num)
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#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1)
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#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2)
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/* Name important RAM_MEAS channels */
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#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1 MLX90632_RAM_3(17)
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#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2 MLX90632_RAM_3(18)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_1 MLX90632_RAM_1(17)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_2 MLX90632_RAM_2(17)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_3 MLX90632_RAM_1(18)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_4 MLX90632_RAM_2(18)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_5 MLX90632_RAM_1(19)
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#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_6 MLX90632_RAM_2(19)
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/* Magic constants */
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#define MLX90632_ID_MEDICAL 0x0105 /* EEPROM DSPv5 Medical device id */
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#define MLX90632_ID_CONSUMER 0x0205 /* EEPROM DSPv5 Consumer device id */
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#define MLX90632_ID_EXTENDED 0x0505 /* EEPROM DSPv5 Extended range device id */
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#define MLX90632_ID_MASK GENMASK(14, 0) /* DSP version and device ID in EE_VERSION */
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#define MLX90632_DSP_VERSION 5 /* DSP version */
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#define MLX90632_DSP_MASK GENMASK(7, 0) /* DSP version in EE_VERSION */
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#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */
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#define MLX90632_REF_12 12LL /* ResCtrlRef value of Ch 1 or Ch 2 */
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#define MLX90632_REF_3 12LL /* ResCtrlRef value of Channel 3 */
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#define MLX90632_MAX_MEAS_NUM 31 /* Maximum measurements in list */
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#define MLX90632_SLEEP_DELAY_MS 6000 /* Autosleep delay */
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#define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
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#define MLX90632_MEAS_MAX_TIME 2000 /* Max measurement time in ms for the lowest refresh rate */
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/**
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* struct mlx90632_data - private data for the MLX90632 device
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* @client: I2C client of the device
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* @lock: Internal mutex for multiple reads for single measurement
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* @regmap: Regmap of the device
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* @emissivity: Object emissivity from 0 to 1000 where 1000 = 1.
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* @mtyp: Measurement type physical sensor configuration for extended range
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* calculations
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* @object_ambient_temperature: Ambient temperature at object (might differ of
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* the ambient temperature of sensor.
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* @regulator: Regulator of the device
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* @powerstatus: Current POWER status of the device
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* @interaction_ts: Timestamp of the last temperature read that is used
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* for power management in jiffies
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*/
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struct mlx90632_data {
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struct i2c_client *client;
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struct mutex lock;
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struct regmap *regmap;
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u16 emissivity;
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u8 mtyp;
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u32 object_ambient_temperature;
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struct regulator *regulator;
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int powerstatus;
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unsigned long interaction_ts;
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};
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static const struct regmap_range mlx90632_volatile_reg_range[] = {
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regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
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regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
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regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
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regmap_reg_range(MLX90632_RAM_1(0),
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MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
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};
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static const struct regmap_access_table mlx90632_volatile_regs_tbl = {
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.yes_ranges = mlx90632_volatile_reg_range,
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.n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range),
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};
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static const struct regmap_range mlx90632_read_reg_range[] = {
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regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
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regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
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regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
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regmap_reg_range(MLX90632_EE_MEDICAL_MEAS1, MLX90632_EE_MEDICAL_MEAS2),
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regmap_reg_range(MLX90632_EE_EXTENDED_MEAS1, MLX90632_EE_EXTENDED_MEAS3),
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regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
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regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
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regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
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regmap_reg_range(MLX90632_RAM_1(0),
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MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
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};
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static const struct regmap_access_table mlx90632_readable_regs_tbl = {
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.yes_ranges = mlx90632_read_reg_range,
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.n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range),
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};
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static const struct regmap_range mlx90632_no_write_reg_range[] = {
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regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
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regmap_reg_range(MLX90632_RAM_1(0),
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MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
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};
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static const struct regmap_access_table mlx90632_writeable_regs_tbl = {
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.no_ranges = mlx90632_no_write_reg_range,
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.n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range),
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};
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static const struct regmap_config mlx90632_regmap = {
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.reg_bits = 16,
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.val_bits = 16,
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.volatile_table = &mlx90632_volatile_regs_tbl,
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.rd_table = &mlx90632_readable_regs_tbl,
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.wr_table = &mlx90632_writeable_regs_tbl,
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.use_single_read = true,
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.use_single_write = true,
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.reg_format_endian = REGMAP_ENDIAN_BIG,
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.val_format_endian = REGMAP_ENDIAN_BIG,
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.cache_type = REGCACHE_RBTREE,
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};
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static int mlx90632_pwr_set_sleep_step(struct regmap *regmap)
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{
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struct mlx90632_data *data =
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iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
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int ret;
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if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
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return 0;
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ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
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MLX90632_PWR_STATUS_SLEEP_STEP);
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if (ret < 0)
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return ret;
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data->powerstatus = MLX90632_PWR_STATUS_SLEEP_STEP;
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return 0;
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}
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static int mlx90632_pwr_continuous(struct regmap *regmap)
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{
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struct mlx90632_data *data =
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iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
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int ret;
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if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS)
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return 0;
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ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
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MLX90632_PWR_STATUS_CONTINUOUS);
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if (ret < 0)
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return ret;
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data->powerstatus = MLX90632_PWR_STATUS_CONTINUOUS;
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return 0;
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}
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/**
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* mlx90632_reset_delay() - Give the mlx90632 some time to reset properly
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* If this is not done, the following I2C command(s) will not be accepted.
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*/
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static void mlx90632_reset_delay(void)
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{
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usleep_range(150, 200);
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}
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static int mlx90632_get_measurement_time(struct regmap *regmap, u16 meas)
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{
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unsigned int reg;
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int ret;
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ret = regmap_read(regmap, meas, ®);
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if (ret < 0)
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return ret;
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return MLX90632_MEAS_MAX_TIME >> FIELD_GET(MLX90632_EE_RR, reg);
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}
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static int mlx90632_calculate_dataset_ready_time(struct mlx90632_data *data)
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{
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unsigned int refresh_time;
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int ret;
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if (data->mtyp == MLX90632_MTYP_MEDICAL) {
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ret = mlx90632_get_measurement_time(data->regmap,
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MLX90632_EE_MEDICAL_MEAS1);
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if (ret < 0)
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return ret;
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refresh_time = ret;
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ret = mlx90632_get_measurement_time(data->regmap,
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MLX90632_EE_MEDICAL_MEAS2);
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if (ret < 0)
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return ret;
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refresh_time += ret;
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} else {
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ret = mlx90632_get_measurement_time(data->regmap,
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MLX90632_EE_EXTENDED_MEAS1);
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if (ret < 0)
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return ret;
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refresh_time = ret;
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ret = mlx90632_get_measurement_time(data->regmap,
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MLX90632_EE_EXTENDED_MEAS2);
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if (ret < 0)
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return ret;
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refresh_time += ret;
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ret = mlx90632_get_measurement_time(data->regmap,
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MLX90632_EE_EXTENDED_MEAS3);
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if (ret < 0)
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return ret;
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refresh_time += ret;
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}
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return refresh_time;
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}
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/**
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* mlx90632_perform_measurement() - Trigger and retrieve current measurement cycle
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* @data: pointer to mlx90632_data object containing regmap information
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*
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* Perform a measurement and return latest measurement cycle position reported
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* by sensor. This is a blocking function for 500ms, as that is default sensor
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* refresh rate.
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*/
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static int mlx90632_perform_measurement(struct mlx90632_data *data)
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{
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unsigned int reg_status;
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int ret;
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ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
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MLX90632_STAT_DATA_RDY, 0);
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if (ret < 0)
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return ret;
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ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS, reg_status,
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!(reg_status & MLX90632_STAT_DATA_RDY), 10000,
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100 * 10000);
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if (ret < 0) {
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dev_err(&data->client->dev, "data not ready");
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return -ETIMEDOUT;
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}
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return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
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}
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/**
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* mlx90632_perform_measurement_burst() - Trigger and retrieve current measurement
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* cycle in step sleep mode
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* @data: pointer to mlx90632_data object containing regmap information
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*
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* Perform a measurement and return 2 as measurement cycle position reported
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* by sensor. This is a blocking function for amount dependent on the sensor
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* refresh rate.
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*/
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static int mlx90632_perform_measurement_burst(struct mlx90632_data *data)
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{
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unsigned int reg_status;
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int ret;
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ret = regmap_write_bits(data->regmap, MLX90632_REG_CONTROL,
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MLX90632_CFG_SOB_MASK, MLX90632_CFG_SOB_MASK);
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if (ret < 0)
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return ret;
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ret = mlx90632_calculate_dataset_ready_time(data);
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if (ret < 0)
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return ret;
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msleep(ret); /* Wait minimum time for dataset to be ready */
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ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
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reg_status,
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(reg_status & MLX90632_STAT_BUSY) == 0,
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10000, 100 * 10000);
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if (ret < 0) {
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dev_err(&data->client->dev, "data not ready");
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return -ETIMEDOUT;
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}
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return 2;
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}
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static int mlx90632_set_meas_type(struct mlx90632_data *data, u8 type)
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{
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int current_powerstatus;
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int ret;
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if (data->mtyp == type)
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return 0;
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current_powerstatus = data->powerstatus;
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ret = mlx90632_pwr_continuous(data->regmap);
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if (ret < 0)
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return ret;
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ret = regmap_write(data->regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
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if (ret < 0)
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return ret;
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mlx90632_reset_delay();
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ret = regmap_update_bits(data->regmap, MLX90632_REG_CONTROL,
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(MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
|
|
(MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->mtyp = type;
|
|
data->powerstatus = MLX90632_PWR_STATUS_HALT;
|
|
|
|
if (current_powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
|
|
return mlx90632_pwr_set_sleep_step(data->regmap);
|
|
|
|
return mlx90632_pwr_continuous(data->regmap);
|
|
}
|
|
|
|
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 -ECHRNG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlx90632_read_ambient_raw(struct regmap *regmap,
|
|
s16 *ambient_new_raw, s16 *ambient_old_raw)
|
|
{
|
|
unsigned int read_tmp;
|
|
int ret;
|
|
|
|
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)
|
|
{
|
|
unsigned int read_tmp;
|
|
u8 channel_old = 0;
|
|
u8 channel = 0;
|
|
s16 read;
|
|
int ret;
|
|
|
|
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 measurement;
|
|
int ret;
|
|
|
|
mutex_lock(&data->lock);
|
|
ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
|
|
switch (data->powerstatus) {
|
|
case MLX90632_PWR_STATUS_CONTINUOUS:
|
|
ret = mlx90632_perform_measurement(data);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
|
|
break;
|
|
case MLX90632_PWR_STATUS_SLEEP_STEP:
|
|
ret = mlx90632_perform_measurement_burst(data);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
goto read_unlock;
|
|
}
|
|
|
|
measurement = ret; /* If we came here ret holds the measurement position */
|
|
|
|
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_ambient_raw_extended(struct regmap *regmap,
|
|
s16 *ambient_new_raw, s16 *ambient_old_raw)
|
|
{
|
|
unsigned int read_tmp;
|
|
int ret;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
*ambient_new_raw = (s16)read_tmp;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
*ambient_old_raw = (s16)read_tmp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlx90632_read_object_raw_extended(struct regmap *regmap, s16 *object_new_raw)
|
|
{
|
|
unsigned int read_tmp;
|
|
s32 read;
|
|
int ret;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_1, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = (s16)read_tmp;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_2, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = read - (s16)read_tmp;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_3, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = read - (s16)read_tmp;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_4, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = (read + (s16)read_tmp) / 2;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_5, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = read + (s16)read_tmp;
|
|
|
|
ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_6, &read_tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
read = read + (s16)read_tmp;
|
|
|
|
if (read > S16_MAX || read < S16_MIN)
|
|
return -ERANGE;
|
|
|
|
*object_new_raw = read;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *object_new_raw,
|
|
s16 *ambient_new_raw, s16 *ambient_old_raw)
|
|
{
|
|
s32 ret, meas;
|
|
|
|
mutex_lock(&data->lock);
|
|
ret = mlx90632_set_meas_type(data, MLX90632_MTYP_EXTENDED);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
|
|
switch (data->powerstatus) {
|
|
case MLX90632_PWR_STATUS_CONTINUOUS:
|
|
ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
|
|
50000, 800000, false, data);
|
|
if (ret)
|
|
goto read_unlock;
|
|
break;
|
|
case MLX90632_PWR_STATUS_SLEEP_STEP:
|
|
ret = mlx90632_perform_measurement_burst(data);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
goto read_unlock;
|
|
}
|
|
|
|
ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
|
|
if (ret < 0)
|
|
goto read_unlock;
|
|
|
|
ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_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)
|
|
{
|
|
unsigned int read;
|
|
u32 value;
|
|
int ret;
|
|
|
|
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 s64 mlx90632_preprocess_temp_obj_extended(s16 object_new_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 * 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, s64 TAdut4, s32 Fa, s32 Fb,
|
|
s32 Ga, s16 Ha, s16 Hb,
|
|
u16 emissivity)
|
|
{
|
|
s64 calcedKsTO, calcedKsTA, ir_Alpha, 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);
|
|
|
|
return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
|
|
- 27315 - Hb_customer) * 10;
|
|
}
|
|
|
|
static s64 mlx90632_calc_ta4(s64 TAdut, s64 scale)
|
|
{
|
|
return (div64_s64(TAdut, scale) + 27315) *
|
|
(div64_s64(TAdut, scale) + 27315) *
|
|
(div64_s64(TAdut, scale) + 27315) *
|
|
(div64_s64(TAdut, scale) + 27315);
|
|
}
|
|
|
|
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, TAdut4;
|
|
s64 temp = 25000;
|
|
s8 i;
|
|
|
|
kTA = (Ea * 1000LL) >> 16LL;
|
|
kTA0 = (Eb * 1000LL) >> 8LL;
|
|
TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
|
|
TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
|
|
|
|
/* Iterations of calculation as described in datasheet */
|
|
for (i = 0; i < 5; ++i) {
|
|
temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TAdut4,
|
|
Fa, Fb, Ga, Ha, Hb,
|
|
tmp_emi);
|
|
}
|
|
return temp;
|
|
}
|
|
|
|
static s32 mlx90632_calc_temp_object_extended(s64 object, s64 ambient, s64 reflected,
|
|
s32 Ea, s32 Eb, s32 Fa, s32 Fb, s32 Ga,
|
|
s16 Ha, s16 Hb, u16 tmp_emi)
|
|
{
|
|
s64 kTA, kTA0, TAdut, TAdut4, Tr4, TaTr4;
|
|
s64 temp = 25000;
|
|
s8 i;
|
|
|
|
kTA = (Ea * 1000LL) >> 16LL;
|
|
kTA0 = (Eb * 1000LL) >> 8LL;
|
|
TAdut = div64_s64((ambient - kTA0) * 1000000LL, kTA) + 25 * 1000000LL;
|
|
Tr4 = mlx90632_calc_ta4(reflected, 10);
|
|
TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
|
|
TaTr4 = Tr4 - div64_s64(Tr4 - TAdut4, tmp_emi) * 1000;
|
|
|
|
/* Iterations of calculation as described in datasheet */
|
|
for (i = 0; i < 5; ++i) {
|
|
temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TaTr4,
|
|
Fa / 2, Fb, Ga, Ha, Hb,
|
|
tmp_emi);
|
|
}
|
|
|
|
return temp;
|
|
}
|
|
|
|
static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
|
|
{
|
|
s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw;
|
|
s32 Ea, Eb, Fa, Fb, Ga;
|
|
unsigned int read_tmp;
|
|
s64 object, ambient;
|
|
s16 Ha, Hb, Gb, Ka;
|
|
int ret;
|
|
|
|
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;
|
|
|
|
if (object_new_raw > MLX90632_EXTENDED_LIMIT &&
|
|
data->mtyp == MLX90632_MTYP_EXTENDED) {
|
|
ret = mlx90632_read_all_channel_extended(data, &object_new_raw,
|
|
&ambient_new_raw, &ambient_old_raw);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Use extended mode calculations */
|
|
ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
|
|
ambient_old_raw, Gb);
|
|
object = mlx90632_preprocess_temp_obj_extended(object_new_raw,
|
|
ambient_new_raw,
|
|
ambient_old_raw, Ka);
|
|
*val = mlx90632_calc_temp_object_extended(object, ambient,
|
|
data->object_ambient_temperature,
|
|
Ea, Eb, Fa, Fb, Ga,
|
|
Ha, Hb, data->emissivity);
|
|
return 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
s16 ambient_new_raw, ambient_old_raw;
|
|
unsigned int read_tmp;
|
|
s32 PT, PR, PG, PO;
|
|
int ret;
|
|
s16 Gb;
|
|
|
|
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);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw,
|
|
PT, PR, PG, PO, Gb);
|
|
return ret;
|
|
}
|
|
|
|
static int mlx90632_get_refresh_rate(struct mlx90632_data *data,
|
|
int *refresh_rate)
|
|
{
|
|
unsigned int meas1;
|
|
int ret;
|
|
|
|
ret = regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*refresh_rate = MLX90632_REFRESH_RATE(meas1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const int mlx90632_freqs[][2] = {
|
|
{0, 500000},
|
|
{1, 0},
|
|
{2, 0},
|
|
{4, 0},
|
|
{8, 0},
|
|
{16, 0},
|
|
{32, 0},
|
|
{64, 0}
|
|
};
|
|
|
|
/**
|
|
* mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
|
|
* @data: pointer to mlx90632_data object containing interaction_ts information
|
|
*
|
|
* Switch to continuous mode when interaction is faster than MLX90632_MEAS_MAX_TIME. Update the
|
|
* interaction_ts for each function call with the jiffies to enable measurement between function
|
|
* calls. Initial value of the interaction_ts needs to be set before this function call.
|
|
*/
|
|
static int mlx90632_pm_interraction_wakeup(struct mlx90632_data *data)
|
|
{
|
|
unsigned long now;
|
|
int ret;
|
|
|
|
now = jiffies;
|
|
if (time_in_range(now, data->interaction_ts,
|
|
data->interaction_ts +
|
|
msecs_to_jiffies(MLX90632_MEAS_MAX_TIME + 100))) {
|
|
if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
|
|
ret = mlx90632_pwr_continuous(data->regmap);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
data->interaction_ts = now;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
int cr;
|
|
|
|
pm_runtime_get_sync(&data->client->dev);
|
|
ret = mlx90632_pm_interraction_wakeup(data);
|
|
if (ret < 0)
|
|
goto mlx90632_read_raw_pm;
|
|
|
|
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)
|
|
goto mlx90632_read_raw_pm;
|
|
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_MOD_TEMP_OBJECT:
|
|
ret = mlx90632_calc_object_dsp105(data, val);
|
|
if (ret < 0)
|
|
goto mlx90632_read_raw_pm;
|
|
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
case IIO_CHAN_INFO_CALIBEMISSIVITY:
|
|
if (data->emissivity == 1000) {
|
|
*val = 1;
|
|
*val2 = 0;
|
|
} else {
|
|
*val = 0;
|
|
*val2 = data->emissivity * 1000;
|
|
}
|
|
ret = IIO_VAL_INT_PLUS_MICRO;
|
|
break;
|
|
case IIO_CHAN_INFO_CALIBAMBIENT:
|
|
*val = data->object_ambient_temperature;
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
ret = mlx90632_get_refresh_rate(data, &cr);
|
|
if (ret < 0)
|
|
goto mlx90632_read_raw_pm;
|
|
|
|
*val = mlx90632_freqs[cr][0];
|
|
*val2 = mlx90632_freqs[cr][1];
|
|
ret = IIO_VAL_INT_PLUS_MICRO;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
mlx90632_read_raw_pm:
|
|
pm_runtime_mark_last_busy(&data->client->dev);
|
|
pm_runtime_put_autosuspend(&data->client->dev);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
case IIO_CHAN_INFO_CALIBAMBIENT:
|
|
data->object_ambient_temperature = val;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int mlx90632_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 = (int *)mlx90632_freqs;
|
|
*type = IIO_VAL_INT_PLUS_MICRO;
|
|
*length = 2 * ARRAY_SIZE(mlx90632_freqs);
|
|
return IIO_AVAIL_LIST;
|
|
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),
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
},
|
|
{
|
|
.type = IIO_TEMP,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_TEMP_OBJECT,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
|
|
BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
},
|
|
};
|
|
|
|
static const struct iio_info mlx90632_info = {
|
|
.read_raw = mlx90632_read_raw,
|
|
.write_raw = mlx90632_write_raw,
|
|
.read_avail = mlx90632_read_avail,
|
|
};
|
|
|
|
static void mlx90632_sleep(void *_data)
|
|
{
|
|
struct mlx90632_data *data = _data;
|
|
|
|
mlx90632_pwr_set_sleep_step(data->regmap);
|
|
}
|
|
|
|
static int mlx90632_suspend(struct mlx90632_data *data)
|
|
{
|
|
regcache_mark_dirty(data->regmap);
|
|
|
|
dev_dbg(&data->client->dev, "Requesting suspend");
|
|
return mlx90632_pwr_set_sleep_step(data->regmap);
|
|
}
|
|
|
|
static int mlx90632_wakeup(struct mlx90632_data *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = regcache_sync(data->regmap);
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev,
|
|
"Failed to sync regmap registers: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_dbg(&data->client->dev, "Requesting wake-up\n");
|
|
return mlx90632_pwr_continuous(data->regmap);
|
|
}
|
|
|
|
static void mlx90632_disable_regulator(void *_data)
|
|
{
|
|
struct mlx90632_data *data = _data;
|
|
int ret;
|
|
|
|
ret = regulator_disable(data->regulator);
|
|
if (ret < 0)
|
|
dev_err(regmap_get_device(data->regmap),
|
|
"Failed to disable power regulator: %d\n", ret);
|
|
}
|
|
|
|
static int mlx90632_enable_regulator(struct mlx90632_data *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = regulator_enable(data->regulator);
|
|
if (ret < 0) {
|
|
dev_err(regmap_get_device(data->regmap), "Failed to enable power regulator!\n");
|
|
return ret;
|
|
}
|
|
|
|
mlx90632_reset_delay();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mlx90632_probe(struct i2c_client *client)
|
|
{
|
|
const struct i2c_device_id *id = i2c_client_get_device_id(client);
|
|
struct mlx90632_data *mlx90632;
|
|
struct iio_dev *indio_dev;
|
|
struct regmap *regmap;
|
|
unsigned int read;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
|
|
if (!indio_dev) {
|
|
dev_err(&client->dev, "Failed to allocate device\n");
|
|
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;
|
|
mlx90632->mtyp = MLX90632_MTYP_MEDICAL;
|
|
mlx90632->powerstatus = MLX90632_PWR_STATUS_HALT;
|
|
|
|
mutex_init(&mlx90632->lock);
|
|
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);
|
|
|
|
mlx90632->regulator = devm_regulator_get(&client->dev, "vdd");
|
|
if (IS_ERR(mlx90632->regulator))
|
|
return dev_err_probe(&client->dev, PTR_ERR(mlx90632->regulator),
|
|
"failed to get vdd regulator");
|
|
|
|
ret = mlx90632_enable_regulator(mlx90632);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = devm_add_action_or_reset(&client->dev, mlx90632_disable_regulator,
|
|
mlx90632);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to setup regulator cleanup action %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = mlx90632_wakeup(mlx90632);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Wakeup failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_add_action_or_reset(&client->dev, mlx90632_sleep, mlx90632);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to setup low power cleanup action %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
}
|
|
read = read & MLX90632_ID_MASK;
|
|
if (read == MLX90632_ID_MEDICAL) {
|
|
dev_dbg(&client->dev,
|
|
"Detected Medical EEPROM calibration %x\n", read);
|
|
} else if (read == MLX90632_ID_CONSUMER) {
|
|
dev_dbg(&client->dev,
|
|
"Detected Consumer EEPROM calibration %x\n", read);
|
|
} else if (read == MLX90632_ID_EXTENDED) {
|
|
dev_dbg(&client->dev,
|
|
"Detected Extended range EEPROM calibration %x\n", read);
|
|
mlx90632->mtyp = MLX90632_MTYP_EXTENDED;
|
|
} else if ((read & MLX90632_DSP_MASK) == MLX90632_DSP_VERSION) {
|
|
dev_dbg(&client->dev,
|
|
"Detected Unknown EEPROM calibration %x\n", read);
|
|
} else {
|
|
dev_err(&client->dev,
|
|
"Wrong DSP version %x (expected %x)\n",
|
|
read, MLX90632_DSP_VERSION);
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
mlx90632->emissivity = 1000;
|
|
mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
|
|
mlx90632->interaction_ts = jiffies; /* Set initial value */
|
|
|
|
pm_runtime_get_noresume(&client->dev);
|
|
pm_runtime_set_active(&client->dev);
|
|
|
|
ret = devm_pm_runtime_enable(&client->dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
pm_runtime_put_autosuspend(&client->dev);
|
|
|
|
return devm_iio_device_register(&client->dev, indio_dev);
|
|
}
|
|
|
|
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);
|
|
|
|
static int mlx90632_pm_suspend(struct device *dev)
|
|
{
|
|
struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
|
|
int ret;
|
|
|
|
ret = mlx90632_suspend(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regulator_disable(data->regulator);
|
|
if (ret < 0)
|
|
dev_err(regmap_get_device(data->regmap),
|
|
"Failed to disable power regulator: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mlx90632_pm_resume(struct device *dev)
|
|
{
|
|
struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
|
|
int ret;
|
|
|
|
ret = mlx90632_enable_regulator(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return mlx90632_wakeup(data);
|
|
}
|
|
|
|
static int mlx90632_pm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
|
|
|
|
return mlx90632_pwr_set_sleep_step(data->regmap);
|
|
}
|
|
|
|
static const struct dev_pm_ops mlx90632_pm_ops = {
|
|
SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
|
|
RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, NULL, NULL)
|
|
};
|
|
|
|
static struct i2c_driver mlx90632_driver = {
|
|
.driver = {
|
|
.name = "mlx90632",
|
|
.of_match_table = mlx90632_of_match,
|
|
.pm = pm_ptr(&mlx90632_pm_ops),
|
|
},
|
|
.probe = mlx90632_probe,
|
|
.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");
|