![Dan Carpenter](/assets/img/avatar_default.png)
This shouldn't affect runtime at all, but Smatch complains that we should check if mlx90632_read_ambient_raw() otherwise we "ambient_new_raw" can be uninitialized. drivers/iio/temperature/mlx90632.c:509 mlx90632_calc_ambient_dsp105() error: uninitialized symbol 'ambient_new_raw'. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Crt Mori <cmo@melexis.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
753 lines
21 KiB
C
753 lines
21 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/delay.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/kernel.h>
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#include <linux/module.h>
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#include <linux/math64.h>
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#include <linux/of.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.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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/* 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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/* 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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/* 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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/* 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_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 3000 /**< Autosleep delay */
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struct mlx90632_data {
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struct i2c_client *client;
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struct mutex lock; /* Multiple reads for single measurement */
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struct regmap *regmap;
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u16 emissivity;
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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_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_REG_I2C_ADDR, MLX90632_REG_CONTROL),
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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_rw = 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 s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
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{
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return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
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MLX90632_CFG_PWR_MASK,
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MLX90632_PWR_STATUS_SLEEP_STEP);
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}
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static s32 mlx90632_pwr_continuous(struct regmap *regmap)
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{
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return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
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MLX90632_CFG_PWR_MASK,
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MLX90632_PWR_STATUS_CONTINUOUS);
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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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int ret, tries = 100;
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unsigned int reg_status;
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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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while (tries-- > 0) {
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ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
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®_status);
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if (ret < 0)
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return ret;
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if (reg_status & MLX90632_STAT_DATA_RDY)
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break;
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usleep_range(10000, 11000);
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}
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if (tries < 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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static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
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uint8_t *channel_old)
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{
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switch (perform_ret) {
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case 1:
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*channel_new = 1;
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*channel_old = 2;
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break;
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case 2:
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*channel_new = 2;
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*channel_old = 1;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int mlx90632_read_ambient_raw(struct regmap *regmap,
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s16 *ambient_new_raw, s16 *ambient_old_raw)
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{
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int ret;
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unsigned int read_tmp;
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ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp);
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if (ret < 0)
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return ret;
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*ambient_new_raw = (s16)read_tmp;
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ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp);
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if (ret < 0)
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return ret;
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*ambient_old_raw = (s16)read_tmp;
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return ret;
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}
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static int mlx90632_read_object_raw(struct regmap *regmap,
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int perform_measurement_ret,
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s16 *object_new_raw, s16 *object_old_raw)
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{
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int ret;
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unsigned int read_tmp;
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s16 read;
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u8 channel = 0;
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u8 channel_old = 0;
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ret = mlx90632_channel_new_select(perform_measurement_ret, &channel,
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&channel_old);
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if (ret != 0)
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return ret;
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ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp);
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if (ret < 0)
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return ret;
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read = (s16)read_tmp;
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ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp);
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if (ret < 0)
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return ret;
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*object_new_raw = (read + (s16)read_tmp) / 2;
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ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp);
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if (ret < 0)
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return ret;
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read = (s16)read_tmp;
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ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp);
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if (ret < 0)
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return ret;
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*object_old_raw = (read + (s16)read_tmp) / 2;
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return ret;
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}
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static int mlx90632_read_all_channel(struct mlx90632_data *data,
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s16 *ambient_new_raw, s16 *ambient_old_raw,
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s16 *object_new_raw, s16 *object_old_raw)
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{
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s32 ret, measurement;
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mutex_lock(&data->lock);
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measurement = mlx90632_perform_measurement(data);
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if (measurement < 0) {
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ret = measurement;
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goto read_unlock;
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}
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ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
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ambient_old_raw);
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if (ret < 0)
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goto read_unlock;
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ret = mlx90632_read_object_raw(data->regmap, measurement,
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object_new_raw, object_old_raw);
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read_unlock:
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mutex_unlock(&data->lock);
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return ret;
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}
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static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
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s32 *reg_value)
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{
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s32 ret;
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unsigned int read;
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u32 value;
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ret = regmap_read(regmap, reg_lsb, &read);
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if (ret < 0)
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return ret;
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value = read;
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ret = regmap_read(regmap, reg_lsb + 1, &read);
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if (ret < 0)
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return ret;
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*reg_value = (read << 16) | (value & 0xffff);
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return 0;
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}
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static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw,
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s16 ambient_old_raw, s16 Gb)
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{
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s64 VR_Ta, kGb, tmp;
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kGb = ((s64)Gb * 1000LL) >> 10ULL;
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VR_Ta = (s64)ambient_old_raw * 1000000LL +
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kGb * div64_s64(((s64)ambient_new_raw * 1000LL),
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(MLX90632_REF_3));
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tmp = div64_s64(
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div64_s64(((s64)ambient_new_raw * 1000000000000LL),
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(MLX90632_REF_3)), VR_Ta);
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return div64_s64(tmp << 19ULL, 1000LL);
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}
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static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw,
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s16 ambient_new_raw,
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s16 ambient_old_raw, s16 Ka)
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{
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s64 VR_IR, kKa, tmp;
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kKa = ((s64)Ka * 1000LL) >> 10ULL;
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VR_IR = (s64)ambient_old_raw * 1000000LL +
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kKa * div64_s64(((s64)ambient_new_raw * 1000LL),
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(MLX90632_REF_3));
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tmp = div64_s64(
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div64_s64(((s64)((object_new_raw + object_old_raw) / 2)
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* 1000000000000LL), (MLX90632_REF_12)),
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VR_IR);
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return div64_s64((tmp << 19ULL), 1000LL);
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}
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static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
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s32 P_T, s32 P_R, s32 P_G, s32 P_O,
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s16 Gb)
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{
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s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
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AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw,
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Gb);
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Asub = ((s64)P_T * 10000000000LL) >> 44ULL;
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Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL);
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Ablock = Asub * (Bsub * Bsub);
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Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL;
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Cblock = ((s64)P_O * 10000000000LL) >> 8ULL;
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sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock;
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return div64_s64(sum, 10000000LL);
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}
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static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
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s64 TAdut, s32 Fa, s32 Fb,
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s32 Ga, s16 Ha, s16 Hb,
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u16 emissivity)
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{
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s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
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s64 Ha_customer, Hb_customer;
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Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
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Hb_customer = ((s64)Hb * 100) >> 10ULL;
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calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL)
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* 1000LL)) >> 36LL;
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calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL;
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Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL)
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* Ha_customer), 1000LL);
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Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA));
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Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL);
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Alpha_corr = div64_s64(Alpha_corr, 1000LL);
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ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr);
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TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) *
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(div64_s64(TAdut, 10000LL) + 27315) *
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(div64_s64(TAdut, 10000LL) + 27315) *
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(div64_s64(TAdut, 10000LL) + 27315);
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return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
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- 27315 - Hb_customer) * 10;
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}
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static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
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s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
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u16 tmp_emi)
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{
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s64 kTA, kTA0, TAdut;
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s64 temp = 25000;
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s8 i;
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kTA = (Ea * 1000LL) >> 16LL;
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kTA0 = (Eb * 1000LL) >> 8LL;
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TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
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/* Iterations of calculation as described in datasheet */
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for (i = 0; i < 5; ++i) {
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temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
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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);
|
|
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_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,
|
|
};
|
|
|
|
static int mlx90632_sleep(struct mlx90632_data *data)
|
|
{
|
|
regcache_mark_dirty(data->regmap);
|
|
|
|
dev_dbg(&data->client->dev, "Requesting sleep");
|
|
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 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\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;
|
|
|
|
mutex_init(&mlx90632->lock);
|
|
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 = mlx90632_wakeup(mlx90632);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Wakeup failed: %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;
|
|
}
|
|
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 {
|
|
dev_err(&client->dev,
|
|
"EEPROM version mismatch %x (expected %x or %x)\n",
|
|
read, MLX90632_ID_CONSUMER, MLX90632_ID_MEDICAL);
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
mlx90632->emissivity = 1000;
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
ret = pm_runtime_set_active(&client->dev);
|
|
if (ret < 0) {
|
|
mlx90632_sleep(mlx90632);
|
|
return ret;
|
|
}
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
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);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
|
|
mlx90632_sleep(data);
|
|
|
|
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);
|
|
|
|
static int __maybe_unused 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);
|
|
|
|
return mlx90632_sleep(data);
|
|
}
|
|
|
|
static int __maybe_unused 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);
|
|
|
|
return mlx90632_wakeup(data);
|
|
}
|
|
|
|
static UNIVERSAL_DEV_PM_OPS(mlx90632_pm_ops, mlx90632_pm_suspend,
|
|
mlx90632_pm_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");
|