* [PATCH v3 1/3] iio: temperature: Adding support for MLX90632
@ 2017-12-06 9:54 Crt Mori
2017-12-10 19:43 ` Jonathan Cameron
0 siblings, 1 reply; 3+ messages in thread
From: Crt Mori @ 2017-12-06 9:54 UTC (permalink / raw)
To: Jonathan Cameron; +Cc: linux-iio, Crt Mori
Melexis has just released Infra Red temperature sensor MLX90632 used
for contact-less temperature measurement. Driver provides basic
functionality for reporting object (and ambient) temperature with
support for object emissivity.
Signed-off-by: Crt Mori <cmo@melexis.com>
---
MAINTAINERS | 7 +
drivers/iio/temperature/Kconfig | 12 +
drivers/iio/temperature/Makefile | 1 +
drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++
4 files changed, 807 insertions(+)
create mode 100644 drivers/iio/temperature/mlx90632.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 2d3d750b19c0..81aec02b08b8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8690,6 +8690,13 @@ W: http://www.melexis.com
S: Supported
F: drivers/iio/temperature/mlx90614.c
+MELEXIS MLX90632 DRIVER
+M: Crt Mori <cmo@melexis.com>
+L: linux-iio@vger.kernel.org
+W: http://www.melexis.com
+S: Supported
+F: drivers/iio/temperature/mlx90632.c
+
MELFAS MIP4 TOUCHSCREEN DRIVER
M: Sangwon Jee <jeesw@melfas.com>
W: http://www.melfas.com
diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig
index 5378976d6d27..82e4a62745e2 100644
--- a/drivers/iio/temperature/Kconfig
+++ b/drivers/iio/temperature/Kconfig
@@ -43,6 +43,18 @@ config MLX90614
This driver can also be built as a module. If so, the module will
be called mlx90614.
+config MLX90632
+ tristate "MLX90632 contact-less infrared sensor with medical accuracy"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the Melexis
+ MLX90632 contact-less infrared sensor with medical accuracy
+ connected with I2C.
+
+ This driver can also be built as a module. If so, the module will
+ be called mlx90632.
+
config TMP006
tristate "TMP006 infrared thermopile sensor"
depends on I2C
diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile
index ad1d668de546..44644fe01bc9 100644
--- a/drivers/iio/temperature/Makefile
+++ b/drivers/iio/temperature/Makefile
@@ -5,6 +5,7 @@
obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o
obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o
obj-$(CONFIG_MLX90614) += mlx90614.o
+obj-$(CONFIG_MLX90632) += mlx90632.o
obj-$(CONFIG_TMP006) += tmp006.o
obj-$(CONFIG_TMP007) += tmp007.o
obj-$(CONFIG_TSYS01) += tsys01.o
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
new file mode 100644
index 000000000000..74c23b69f9dc
--- /dev/null
+++ b/drivers/iio/temperature/mlx90632.c
@@ -0,0 +1,787 @@
+/*
+ * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor
+ *
+ * Copyright (c) 2017 Melexis <cmo@melexis.com>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/math64.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+/* Memory sections addresses */
+#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */
+#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */
+
+/* EEPROM addresses - used at startup */
+#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */
+#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */
+#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */
+#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */
+#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */
+#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */
+#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */
+#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */
+#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */
+#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */
+#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */
+#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */
+#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */
+#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */
+#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */
+#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */
+#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */
+#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */
+#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */
+#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */
+
+#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */
+#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */
+
+#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
+#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
+
+/* Register addresses - volatile */
+#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
+
+/* Control register address - volatile */
+#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
+#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
+/* PowerModes statuses */
+#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
+#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
+#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
+#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
+#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
+
+/* Device status register - volatile */
+#define MLX90632_REG_STATUS 0x3fff /* Device status register */
+#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */
+#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */
+#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */
+#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */
+#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */
+
+/* RAM_MEAS address-es for each channel */
+#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num)
+#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1)
+#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2)
+
+/* Magic constants */
+#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */
+#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */
+#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */
+#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */
+#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */
+#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */
+#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */
+#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */
+
+struct mlx90632_data {
+ struct i2c_client *client;
+ struct mutex lock; /* Multiple reads for single measurement */
+ struct regmap *regmap;
+ u16 emissivity;
+};
+
+static const struct regmap_range mlx90632_volatile_reg_range[] = {
+ regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
+ regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
+ regmap_reg_range(MLX90632_RAM_1(0),
+ MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
+};
+
+static const struct regmap_access_table mlx90632_volatile_regs_tbl = {
+ .yes_ranges = mlx90632_volatile_reg_range,
+ .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range),
+};
+
+static const struct regmap_range mlx90632_read_reg_range[] = {
+ regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
+ regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
+ regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
+ regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
+ regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
+ regmap_reg_range(MLX90632_RAM_1(0),
+ MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
+};
+
+static const struct regmap_access_table mlx90632_readable_regs_tbl = {
+ .yes_ranges = mlx90632_read_reg_range,
+ .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range),
+};
+
+static const struct regmap_range mlx90632_no_write_reg_range[] = {
+ regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
+ regmap_reg_range(MLX90632_RAM_1(0),
+ MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
+};
+
+static const struct regmap_access_table mlx90632_writeable_regs_tbl = {
+ .no_ranges = mlx90632_no_write_reg_range,
+ .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range),
+};
+
+static const struct regmap_config mlx90632_regmap = {
+ .reg_bits = 16,
+ .val_bits = 16,
+
+ .volatile_table = &mlx90632_volatile_regs_tbl,
+ .rd_table = &mlx90632_readable_regs_tbl,
+ .wr_table = &mlx90632_writeable_regs_tbl,
+
+ .use_single_rw = true,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .val_format_endian = REGMAP_ENDIAN_BIG,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
+{
+ return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
+ MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_SLEEP_STEP);
+}
+
+static s32 mlx90632_pwr_continuous(struct regmap *regmap)
+{
+ return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
+ MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_CONTINUOUS);
+}
+
+/**
+ * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle
+ * @*data: pointer to mlx90632_data object containing regmap information
+ *
+ * Perform a measurement and return latest measurement cycle position reported
+ * by sensor. This is a blocking function for 500ms, as that is default sensor
+ * refresh rate.
+ */
+static int mlx90632_perform_measurement(struct mlx90632_data *data)
+{
+ int ret, tries = 100;
+ unsigned int reg_status;
+
+ ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
+ MLX90632_STAT_DATA_RDY, 0);
+ if (ret < 0)
+ return ret;
+
+ while (tries-- > 0) {
+ ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
+ ®_status);
+ if (ret < 0)
+ return ret;
+ if (reg_status & MLX90632_STAT_DATA_RDY)
+ break;
+ usleep_range(10000, 11000);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev, "data not ready");
+ return -ETIMEDOUT;
+ }
+
+ return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
+}
+
+static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
+ uint8_t *channel_old)
+{
+ switch (perform_ret) {
+ case 1:
+ *channel_new = 1;
+ *channel_old = 2;
+ break;
+ case 2:
+ *channel_new = 2;
+ *channel_old = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mlx90632_read_ambient_raw(struct regmap *regmap,
+ s16 *ambient_new_raw, s16 *ambient_old_raw)
+{
+ int ret;
+ unsigned int read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_new_raw = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_old_raw = (s16)read_tmp;
+
+ return ret;
+}
+
+static int mlx90632_read_object_raw(struct regmap *regmap,
+ int perform_measurement_ret,
+ s16 *object_new_raw, s16 *object_old_raw)
+{
+ int ret;
+ unsigned int read_tmp;
+ s16 read;
+ u8 channel = 0;
+ u8 channel_old = 0;
+
+ ret = mlx90632_channel_new_select(perform_measurement_ret, &channel,
+ &channel_old);
+ if (ret != 0)
+ return ret;
+
+ ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp);
+ if (ret < 0)
+ return ret;
+
+ read = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp);
+ if (ret < 0)
+ return ret;
+ *object_new_raw = (read + (s16)read_tmp) / 2;
+
+ ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp);
+ if (ret < 0)
+ return ret;
+ *object_old_raw = (read + (s16)read_tmp) / 2;
+
+ return ret;
+}
+
+static int mlx90632_read_all_channel(struct mlx90632_data *data,
+ s16 *ambient_new_raw, s16 *ambient_old_raw,
+ s16 *object_new_raw, s16 *object_old_raw)
+{
+ s32 ret, measurement;
+
+ mutex_lock(&data->lock);
+ measurement = mlx90632_perform_measurement(data);
+ if (measurement < 0) {
+ ret = measurement;
+ goto read_unlock;
+ }
+ ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
+ ambient_old_raw);
+ if (ret < 0)
+ goto read_unlock;
+
+ ret = mlx90632_read_object_raw(data->regmap, measurement,
+ object_new_raw, object_old_raw);
+read_unlock:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
+ s32 *reg_value)
+{
+ s32 ret;
+ unsigned int read;
+ u32 value;
+
+ ret = regmap_read(regmap, reg_lsb, &read);
+ if (ret < 0)
+ return ret;
+
+ value = read;
+
+ ret = regmap_read(regmap, reg_lsb + 1, &read);
+ if (ret < 0)
+ return ret;
+
+ *reg_value = (read << 16) | (value & 0xffff);
+
+ return 0;
+}
+
+static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw,
+ s16 ambient_old_raw, s16 Gb)
+{
+ s64 VR_Ta, kGb, tmp;
+
+ kGb = ((s64)Gb * 1000LL) >> 10ULL;
+ VR_Ta = (s64)ambient_old_raw * 1000000LL +
+ kGb * div64_s64(((s64)ambient_new_raw * 1000LL),
+ (MLX90632_REF_3));
+ tmp = div64_s64(
+ div64_s64(((s64)ambient_new_raw * 1000000000000LL),
+ (MLX90632_REF_3)), VR_Ta);
+ return div64_s64(tmp << 19ULL, 1000LL);
+}
+
+static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw,
+ s16 ambient_new_raw,
+ s16 ambient_old_raw, s16 Ka)
+{
+ s64 VR_IR, kKa, tmp;
+
+ kKa = ((s64)Ka * 1000LL) >> 10ULL;
+ VR_IR = (s64)ambient_old_raw * 1000000LL +
+ kKa * div64_s64(((s64)ambient_new_raw * 1000LL),
+ (MLX90632_REF_3));
+ tmp = div64_s64(
+ div64_s64(((s64)((object_new_raw + object_old_raw) / 2)
+ * 1000000000000LL), (MLX90632_REF_12)),
+ VR_IR);
+ return div64_s64((tmp << 19ULL), 1000LL);
+}
+
+static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
+ s32 P_T, s32 P_R, s32 P_G, s32 P_O,
+ s16 Gb)
+{
+ s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
+
+ AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw,
+ Gb);
+ Asub = ((s64)P_T * 10000000000LL) >> 44ULL;
+ Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL);
+ Ablock = Asub * (Bsub * Bsub);
+ Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL;
+ Cblock = ((s64)P_O * 10000000000LL) >> 8ULL;
+
+ sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock;
+
+ return div64_s64(sum, 10000000LL);
+}
+
+static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
+ s64 TAdut, s32 Fa, s32 Fb,
+ s32 Ga, s16 Ha, s16 Hb,
+ u16 emissivity)
+{
+ s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
+ s64 Ha_customer, Hb_customer;
+
+ Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
+ Hb_customer = ((s64)Hb * 100) >> 10ULL;
+
+ calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL)
+ * 1000LL)) >> 36LL;
+ calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL;
+ Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL)
+ * Ha_customer), 1000LL);
+ Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA));
+ Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL);
+ Alpha_corr = div64_s64(Alpha_corr, 1000LL);
+ ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr);
+ TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) *
+ (div64_s64(TAdut, 10000LL) + 27315) *
+ (div64_s64(TAdut, 10000LL) + 27315) *
+ (div64_s64(TAdut, 10000LL) + 27315);
+
+ return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
+ - 27315 - Hb_customer) * 10;
+}
+
+static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
+ s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
+ u16 tmp_emi)
+{
+ s64 kTA, kTA0, TAdut;
+ s64 temp = 25000;
+ s8 i;
+
+ kTA = (Ea * 1000LL) >> 16LL;
+ kTA0 = (Eb * 1000LL) >> 8LL;
+ TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
+
+ /* Iterations of calculation as described in datasheet */
+ for (i = 0; i < 5; ++i) {
+ temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
+ Fa, Fb, Ga, Ha, Hb,
+ tmp_emi);
+ }
+ return temp;
+}
+
+static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
+{
+ s32 ret;
+ s32 Ea, Eb, Fa, Fb, Ga;
+ unsigned int read_tmp;
+ s16 Ha, Hb, Gb, Ka;
+ s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw;
+ s64 object, ambient;
+
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga);
+ if (ret < 0)
+ return ret;
+ ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp);
+ if (ret < 0)
+ return ret;
+ Ha = (s16)read_tmp;
+ ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp);
+ if (ret < 0)
+ return ret;
+ Hb = (s16)read_tmp;
+ ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
+ if (ret < 0)
+ return ret;
+ Gb = (s16)read_tmp;
+ ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp);
+ if (ret < 0)
+ return ret;
+ Ka = (s16)read_tmp;
+
+ ret = mlx90632_read_all_channel(data,
+ &ambient_new_raw, &ambient_old_raw,
+ &object_new_raw, &object_old_raw);
+ if (ret < 0)
+ return ret;
+
+ ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
+ ambient_old_raw, Gb);
+ object = mlx90632_preprocess_temp_obj(object_new_raw,
+ object_old_raw,
+ ambient_new_raw,
+ ambient_old_raw, Ka);
+
+ *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga,
+ Ha, Hb, data->emissivity);
+ return 0;
+}
+
+static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
+{
+ s32 ret;
+ unsigned int read_tmp;
+ s32 PT, PR, PG, PO;
+ s16 Gb;
+ s16 ambient_new_raw, ambient_old_raw;
+
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT);
+ if (ret < 0)
+ return ret;
+ ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO);
+ if (ret < 0)
+ return ret;
+ ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
+ if (ret < 0)
+ return ret;
+ Gb = (s16)read_tmp;
+
+ ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw,
+ &ambient_old_raw);
+ *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw,
+ PT, PR, PG, PO, Gb);
+ return ret;
+}
+
+static int mlx90632_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *channel, int *val,
+ int *val2, long mask)
+{
+ struct mlx90632_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (channel->channel2) {
+ case IIO_MOD_TEMP_AMBIENT:
+ ret = mlx90632_calc_ambient_dsp105(data, val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_MOD_TEMP_OBJECT:
+ ret = mlx90632_calc_object_dsp105(data, val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_CALIBEMISSIVITY:
+ if (data->emissivity == 1000) {
+ *val = 1;
+ *val2 = 0;
+ } else {
+ *val = 0;
+ *val2 = data->emissivity * 1000;
+ }
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mlx90632_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *channel, int val,
+ int val2, long mask)
+{
+ struct mlx90632_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBEMISSIVITY:
+ /* Confirm we are within 0 and 1.0 */
+ if (val < 0 || val2 < 0 || val > 1 ||
+ (val == 1 && val2 != 0))
+ return -EINVAL;
+ data->emissivity = val * 1000 + val2 / 1000;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_chan_spec mlx90632_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .modified = 1,
+ .channel2 = IIO_MOD_TEMP_AMBIENT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ },
+ {
+ .type = IIO_TEMP,
+ .modified = 1,
+ .channel2 = IIO_MOD_TEMP_OBJECT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
+ },
+};
+
+static const struct iio_info mlx90632_info = {
+ .read_raw = mlx90632_read_raw,
+ .write_raw = mlx90632_write_raw,
+};
+
+#ifdef CONFIG_PM
+static int mlx90632_sleep(struct mlx90632_data *data)
+{
+ dev_dbg(&data->client->dev, "Requesting sleep");
+ return mlx90632_pwr_set_sleep_step(data->regmap);
+}
+
+static int mlx90632_wakeup(struct mlx90632_data *data)
+{
+ dev_dbg(&data->client->dev, "Requesting wake-up");
+ return mlx90632_pwr_continuous(data->regmap);
+}
+#endif
+
+static int mlx90632_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct mlx90632_data *mlx90632;
+ struct regmap *regmap;
+ int ret;
+ unsigned int read;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
+ if (!indio_dev) {
+ dev_err(&client->dev, "Failed to allocate device");
+ return -ENOMEM;
+ }
+
+ regmap = devm_regmap_init_i2c(client, &mlx90632_regmap);
+ if (IS_ERR(regmap)) {
+ ret = PTR_ERR(regmap);
+ dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret);
+ return ret;
+ }
+
+ mlx90632 = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ mlx90632->client = client;
+ mlx90632->regmap = regmap;
+
+ mutex_init(&mlx90632->lock);
+ mlx90632_wakeup(mlx90632);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &mlx90632_info;
+ indio_dev->channels = mlx90632_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels);
+
+ ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read);
+ if (ret < 0) {
+ dev_err(&client->dev, "read of version failed: %d\n", ret);
+ return ret;
+ }
+ /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */
+ if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) {
+ dev_dbg(&client->dev,
+ "Detected Medical EEPROM calibration %x", read);
+ } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) {
+ dev_dbg(&client->dev,
+ "Detected Consumer EEPROM calibration %x", read);
+ } else {
+ dev_err(&client->dev,
+ "Chip EEPROM version mismatch %x (expected %x)",
+ read, MLX90632_EEPROM_VERSION);
+ return -EPROTONOSUPPORT;
+ }
+
+ mlx90632->emissivity = 1000;
+
+ return iio_device_register(indio_dev);
+}
+
+static int mlx90632_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct mlx90632_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev))
+ mlx90632_sleep(data);
+ pm_runtime_set_suspended(&client->dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id mlx90632_id[] = {
+ { "mlx90632", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mlx90632_id);
+
+static const struct of_device_id mlx90632_of_match[] = {
+ { .compatible = "melexis,mlx90632" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, mlx90632_of_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int mlx90632_pm_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mlx90632_data *data = iio_priv(indio_dev);
+
+ regcache_sync(data->regmap);
+
+ if (pm_runtime_active(dev))
+ return mlx90632_sleep(data);
+
+ return 0;
+}
+
+static int mlx90632_pm_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mlx90632_data *data = iio_priv(indio_dev);
+ int err;
+
+ regcache_mark_dirty(data->regmap);
+ regcache_cache_only(data->regmap, false);
+ err = regcache_sync(data->regmap);
+ if (err < 0) {
+ dev_err(dev, "Failed to sync regmap registers: %d\n", err);
+ return err;
+ }
+
+ err = mlx90632_wakeup(data);
+ if (err < 0)
+ return err;
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int mlx90632_pm_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
+
+ regcache_sync(mlx90632->regmap);
+
+ return mlx90632_sleep(mlx90632);
+}
+
+static int mlx90632_pm_runtime_resume(struct device *dev)
+{
+ s32 ret;
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
+
+ regcache_mark_dirty(mlx90632->regmap);
+ regcache_cache_only(mlx90632->regmap, false);
+ ret = regcache_sync(mlx90632->regmap);
+ if (ret < 0) {
+ dev_err(dev, "Failed to sync regmap registers: %d\n", ret);
+ return ret;
+ }
+
+ return mlx90632_wakeup(mlx90632);
+}
+#endif
+
+static const struct dev_pm_ops mlx90632_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
+ SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend,
+ mlx90632_pm_runtime_resume, NULL)
+};
+
+static struct i2c_driver mlx90632_driver = {
+ .driver = {
+ .name = "mlx90632",
+ .of_match_table = mlx90632_of_match,
+ .pm = &mlx90632_pm_ops,
+ },
+ .probe = mlx90632_probe,
+ .remove = mlx90632_remove,
+ .id_table = mlx90632_id,
+};
+module_i2c_driver(mlx90632_driver);
+
+MODULE_AUTHOR("Crt Mori <cmo@melexis.com>");
+MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver");
+MODULE_LICENSE("GPL v2");
--
2.15.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v3 1/3] iio: temperature: Adding support for MLX90632
2017-12-06 9:54 [PATCH v3 1/3] iio: temperature: Adding support for MLX90632 Crt Mori
@ 2017-12-10 19:43 ` Jonathan Cameron
2017-12-11 9:18 ` Crt Mori
0 siblings, 1 reply; 3+ messages in thread
From: Jonathan Cameron @ 2017-12-10 19:43 UTC (permalink / raw)
To: Crt Mori; +Cc: linux-iio
On Wed, 6 Dec 2017 10:54:54 +0100
Crt Mori <cmo@melexis.com> wrote:
> Melexis has just released Infra Red temperature sensor MLX90632 used
> for contact-less temperature measurement. Driver provides basic
> functionality for reporting object (and ambient) temperature with
> support for object emissivity.
>
> Signed-off-by: Crt Mori <cmo@melexis.com>
Sorry for my rant / review earlier - thought I was looking at V3. oops ;)
Anyhow, much better. A few of the comments from there still apply though
and I'm out of time to port them over to this version today, so I hope
you don't mind fishing them out of that review.
Jonathan
> ---
> MAINTAINERS | 7 +
> drivers/iio/temperature/Kconfig | 12 +
> drivers/iio/temperature/Makefile | 1 +
> drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++
> 4 files changed, 807 insertions(+)
> create mode 100644 drivers/iio/temperature/mlx90632.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2d3d750b19c0..81aec02b08b8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8690,6 +8690,13 @@ W: http://www.melexis.com
> S: Supported
> F: drivers/iio/temperature/mlx90614.c
>
> +MELEXIS MLX90632 DRIVER
> +M: Crt Mori <cmo@melexis.com>
> +L: linux-iio@vger.kernel.org
> +W: http://www.melexis.com
> +S: Supported
> +F: drivers/iio/temperature/mlx90632.c
> +
> MELFAS MIP4 TOUCHSCREEN DRIVER
> M: Sangwon Jee <jeesw@melfas.com>
> W: http://www.melfas.com
> diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig
> index 5378976d6d27..82e4a62745e2 100644
> --- a/drivers/iio/temperature/Kconfig
> +++ b/drivers/iio/temperature/Kconfig
> @@ -43,6 +43,18 @@ config MLX90614
> This driver can also be built as a module. If so, the module will
> be called mlx90614.
>
> +config MLX90632
> + tristate "MLX90632 contact-less infrared sensor with medical accuracy"
> + depends on I2C
> + select REGMAP_I2C
> + help
> + If you say yes here you get support for the Melexis
> + MLX90632 contact-less infrared sensor with medical accuracy
> + connected with I2C.
> +
> + This driver can also be built as a module. If so, the module will
> + be called mlx90632.
> +
> config TMP006
> tristate "TMP006 infrared thermopile sensor"
> depends on I2C
> diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile
> index ad1d668de546..44644fe01bc9 100644
> --- a/drivers/iio/temperature/Makefile
> +++ b/drivers/iio/temperature/Makefile
> @@ -5,6 +5,7 @@
> obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o
> obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o
> obj-$(CONFIG_MLX90614) += mlx90614.o
> +obj-$(CONFIG_MLX90632) += mlx90632.o
> obj-$(CONFIG_TMP006) += tmp006.o
> obj-$(CONFIG_TMP007) += tmp007.o
> obj-$(CONFIG_TSYS01) += tsys01.o
> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
> new file mode 100644
> index 000000000000..74c23b69f9dc
> --- /dev/null
> +++ b/drivers/iio/temperature/mlx90632.c
> @@ -0,0 +1,787 @@
> +/*
> + * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor
> + *
> + * Copyright (c) 2017 Melexis <cmo@melexis.com>
> + *
> + * This file is subject to the terms and conditions of version 2 of
> + * the GNU General Public License. See the file COPYING in the main
> + * directory of this archive for more details.
> + *
> + * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
> + */
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/math64.h>
> +#include <linux/of.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +
> +#include <linux/iio/iio.h>
> +#include <linux/iio/sysfs.h>
> +
> +/* Memory sections addresses */
> +#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */
> +#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */
> +
> +/* EEPROM addresses - used at startup */
> +#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */
> +#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */
> +#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */
> +#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */
> +#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */
> +#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */
> +#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */
> +#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */
> +#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */
> +#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */
> +#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */
> +#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */
> +#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */
> +#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */
> +#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */
> +#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */
> +#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */
> +#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */
> +#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */
> +#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */
> +
> +#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */
> +#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */
> +
> +#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
> +#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
> +
> +/* Register addresses - volatile */
> +#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
> +
> +/* Control register address - volatile */
> +#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
> +#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
> +/* PowerModes statuses */
> +#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
> +#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
> +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
> +#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
> +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
> +
> +/* Device status register - volatile */
> +#define MLX90632_REG_STATUS 0x3fff /* Device status register */
> +#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */
> +#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */
> +#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */
> +#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */
> +#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */
> +
> +/* RAM_MEAS address-es for each channel */
> +#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num)
> +#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1)
> +#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2)
> +
> +/* Magic constants */
> +#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */
> +#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */
> +#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */
> +#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */
> +#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */
> +#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */
> +#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */
> +#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */
> +
> +struct mlx90632_data {
> + struct i2c_client *client;
> + struct mutex lock; /* Multiple reads for single measurement */
> + struct regmap *regmap;
> + u16 emissivity;
> +};
> +
> +static const struct regmap_range mlx90632_volatile_reg_range[] = {
> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
> + regmap_reg_range(MLX90632_RAM_1(0),
> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
> +};
> +
> +static const struct regmap_access_table mlx90632_volatile_regs_tbl = {
> + .yes_ranges = mlx90632_volatile_reg_range,
> + .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range),
> +};
> +
> +static const struct regmap_range mlx90632_read_reg_range[] = {
> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
> + regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
> + regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
> + regmap_reg_range(MLX90632_RAM_1(0),
> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
> +};
> +
> +static const struct regmap_access_table mlx90632_readable_regs_tbl = {
> + .yes_ranges = mlx90632_read_reg_range,
> + .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range),
> +};
> +
> +static const struct regmap_range mlx90632_no_write_reg_range[] = {
> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
> + regmap_reg_range(MLX90632_RAM_1(0),
> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
> +};
> +
> +static const struct regmap_access_table mlx90632_writeable_regs_tbl = {
> + .no_ranges = mlx90632_no_write_reg_range,
> + .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range),
> +};
> +
> +static const struct regmap_config mlx90632_regmap = {
> + .reg_bits = 16,
> + .val_bits = 16,
> +
> + .volatile_table = &mlx90632_volatile_regs_tbl,
> + .rd_table = &mlx90632_readable_regs_tbl,
> + .wr_table = &mlx90632_writeable_regs_tbl,
> +
> + .use_single_rw = true,
> + .reg_format_endian = REGMAP_ENDIAN_BIG,
> + .val_format_endian = REGMAP_ENDIAN_BIG,
> + .cache_type = REGCACHE_RBTREE,
> +};
> +
> +static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
> +{
> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
> + MLX90632_CFG_PWR_MASK,
> + MLX90632_PWR_STATUS_SLEEP_STEP);
> +}
> +
> +static s32 mlx90632_pwr_continuous(struct regmap *regmap)
> +{
> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
> + MLX90632_CFG_PWR_MASK,
> + MLX90632_PWR_STATUS_CONTINUOUS);
> +}
> +
> +/**
> + * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle
> + * @*data: pointer to mlx90632_data object containing regmap information
> + *
> + * Perform a measurement and return latest measurement cycle position reported
> + * by sensor. This is a blocking function for 500ms, as that is default sensor
> + * refresh rate.
> + */
> +static int mlx90632_perform_measurement(struct mlx90632_data *data)
> +{
> + int ret, tries = 100;
> + unsigned int reg_status;
> +
> + ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
> + MLX90632_STAT_DATA_RDY, 0);
> + if (ret < 0)
> + return ret;
> +
> + while (tries-- > 0) {
> + ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
> + ®_status);
> + if (ret < 0)
> + return ret;
> + if (reg_status & MLX90632_STAT_DATA_RDY)
> + break;
> + usleep_range(10000, 11000);
> + }
> +
> + if (tries < 0) {
> + dev_err(&data->client->dev, "data not ready");
> + return -ETIMEDOUT;
> + }
> +
> + return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
> +}
> +
> +static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
> + uint8_t *channel_old)
> +{
> + switch (perform_ret) {
> + case 1:
> + *channel_new = 1;
> + *channel_old = 2;
> + break;
> + case 2:
> + *channel_new = 2;
> + *channel_old = 1;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int mlx90632_read_ambient_raw(struct regmap *regmap,
> + s16 *ambient_new_raw, s16 *ambient_old_raw)
> +{
> + int ret;
> + unsigned int read_tmp;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp);
> + if (ret < 0)
> + return ret;
> + *ambient_new_raw = (s16)read_tmp;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp);
> + if (ret < 0)
> + return ret;
> + *ambient_old_raw = (s16)read_tmp;
> +
> + return ret;
> +}
> +
> +static int mlx90632_read_object_raw(struct regmap *regmap,
> + int perform_measurement_ret,
> + s16 *object_new_raw, s16 *object_old_raw)
> +{
> + int ret;
> + unsigned int read_tmp;
> + s16 read;
> + u8 channel = 0;
> + u8 channel_old = 0;
> +
> + ret = mlx90632_channel_new_select(perform_measurement_ret, &channel,
> + &channel_old);
> + if (ret != 0)
> + return ret;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp);
> + if (ret < 0)
> + return ret;
> +
> + read = (s16)read_tmp;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp);
> + if (ret < 0)
> + return ret;
> + *object_new_raw = (read + (s16)read_tmp) / 2;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp);
> + if (ret < 0)
> + return ret;
> + read = (s16)read_tmp;
> +
> + ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp);
> + if (ret < 0)
> + return ret;
> + *object_old_raw = (read + (s16)read_tmp) / 2;
> +
> + return ret;
> +}
> +
> +static int mlx90632_read_all_channel(struct mlx90632_data *data,
> + s16 *ambient_new_raw, s16 *ambient_old_raw,
> + s16 *object_new_raw, s16 *object_old_raw)
> +{
> + s32 ret, measurement;
> +
> + mutex_lock(&data->lock);
> + measurement = mlx90632_perform_measurement(data);
> + if (measurement < 0) {
> + ret = measurement;
> + goto read_unlock;
> + }
> + ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
> + ambient_old_raw);
> + if (ret < 0)
> + goto read_unlock;
> +
> + ret = mlx90632_read_object_raw(data->regmap, measurement,
> + object_new_raw, object_old_raw);
> +read_unlock:
> + mutex_unlock(&data->lock);
> + return ret;
> +}
> +
> +static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
> + s32 *reg_value)
> +{
> + s32 ret;
> + unsigned int read;
> + u32 value;
> +
> + ret = regmap_read(regmap, reg_lsb, &read);
> + if (ret < 0)
> + return ret;
> +
> + value = read;
> +
> + ret = regmap_read(regmap, reg_lsb + 1, &read);
> + if (ret < 0)
> + return ret;
> +
> + *reg_value = (read << 16) | (value & 0xffff);
> +
> + return 0;
> +}
> +
> +static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw,
> + s16 ambient_old_raw, s16 Gb)
> +{
> + s64 VR_Ta, kGb, tmp;
> +
> + kGb = ((s64)Gb * 1000LL) >> 10ULL;
> + VR_Ta = (s64)ambient_old_raw * 1000000LL +
> + kGb * div64_s64(((s64)ambient_new_raw * 1000LL),
> + (MLX90632_REF_3));
> + tmp = div64_s64(
> + div64_s64(((s64)ambient_new_raw * 1000000000000LL),
> + (MLX90632_REF_3)), VR_Ta);
> + return div64_s64(tmp << 19ULL, 1000LL);
> +}
> +
> +static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw,
> + s16 ambient_new_raw,
> + s16 ambient_old_raw, s16 Ka)
> +{
> + s64 VR_IR, kKa, tmp;
> +
> + kKa = ((s64)Ka * 1000LL) >> 10ULL;
> + VR_IR = (s64)ambient_old_raw * 1000000LL +
> + kKa * div64_s64(((s64)ambient_new_raw * 1000LL),
> + (MLX90632_REF_3));
> + tmp = div64_s64(
> + div64_s64(((s64)((object_new_raw + object_old_raw) / 2)
> + * 1000000000000LL), (MLX90632_REF_12)),
> + VR_IR);
> + return div64_s64((tmp << 19ULL), 1000LL);
> +}
> +
> +static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
> + s32 P_T, s32 P_R, s32 P_G, s32 P_O,
> + s16 Gb)
> +{
> + s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
> +
> + AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw,
> + Gb);
> + Asub = ((s64)P_T * 10000000000LL) >> 44ULL;
> + Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL);
> + Ablock = Asub * (Bsub * Bsub);
> + Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL;
> + Cblock = ((s64)P_O * 10000000000LL) >> 8ULL;
> +
> + sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock;
> +
> + return div64_s64(sum, 10000000LL);
> +}
> +
> +static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
> + s64 TAdut, s32 Fa, s32 Fb,
> + s32 Ga, s16 Ha, s16 Hb,
> + u16 emissivity)
> +{
> + s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
> + s64 Ha_customer, Hb_customer;
> +
> + Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
> + Hb_customer = ((s64)Hb * 100) >> 10ULL;
> +
> + calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL)
> + * 1000LL)) >> 36LL;
> + calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL;
> + Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL)
> + * Ha_customer), 1000LL);
> + Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA));
> + Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL);
> + Alpha_corr = div64_s64(Alpha_corr, 1000LL);
> + ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr);
> + TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) *
> + (div64_s64(TAdut, 10000LL) + 27315) *
> + (div64_s64(TAdut, 10000LL) + 27315) *
> + (div64_s64(TAdut, 10000LL) + 27315);
> +
> + return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
> + - 27315 - Hb_customer) * 10;
> +}
> +
> +static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
> + s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
> + u16 tmp_emi)
> +{
> + s64 kTA, kTA0, TAdut;
> + s64 temp = 25000;
> + s8 i;
> +
> + kTA = (Ea * 1000LL) >> 16LL;
> + kTA0 = (Eb * 1000LL) >> 8LL;
> + TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
> +
> + /* Iterations of calculation as described in datasheet */
> + for (i = 0; i < 5; ++i) {
> + temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
> + Fa, Fb, Ga, Ha, Hb,
> + tmp_emi);
> + }
> + return temp;
> +}
> +
> +static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
> +{
> + s32 ret;
> + s32 Ea, Eb, Fa, Fb, Ga;
> + unsigned int read_tmp;
> + s16 Ha, Hb, Gb, Ka;
> + s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw;
> + s64 object, ambient;
> +
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga);
> + if (ret < 0)
> + return ret;
> + ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp);
> + if (ret < 0)
> + return ret;
> + Ha = (s16)read_tmp;
> + ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp);
> + if (ret < 0)
> + return ret;
> + Hb = (s16)read_tmp;
> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
> + if (ret < 0)
> + return ret;
> + Gb = (s16)read_tmp;
> + ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp);
> + if (ret < 0)
> + return ret;
> + Ka = (s16)read_tmp;
> +
> + ret = mlx90632_read_all_channel(data,
> + &ambient_new_raw, &ambient_old_raw,
> + &object_new_raw, &object_old_raw);
> + if (ret < 0)
> + return ret;
> +
> + ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
> + ambient_old_raw, Gb);
> + object = mlx90632_preprocess_temp_obj(object_new_raw,
> + object_old_raw,
> + ambient_new_raw,
> + ambient_old_raw, Ka);
> +
> + *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga,
> + Ha, Hb, data->emissivity);
> + return 0;
> +}
> +
> +static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
> +{
> + s32 ret;
> + unsigned int read_tmp;
> + s32 PT, PR, PG, PO;
> + s16 Gb;
> + s16 ambient_new_raw, ambient_old_raw;
> +
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT);
> + if (ret < 0)
> + return ret;
> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO);
> + if (ret < 0)
> + return ret;
> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
> + if (ret < 0)
> + return ret;
> + Gb = (s16)read_tmp;
> +
> + ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw,
> + &ambient_old_raw);
> + *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw,
> + PT, PR, PG, PO, Gb);
> + return ret;
> +}
> +
> +static int mlx90632_read_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *channel, int *val,
> + int *val2, long mask)
> +{
> + struct mlx90632_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_PROCESSED:
> + switch (channel->channel2) {
> + case IIO_MOD_TEMP_AMBIENT:
> + ret = mlx90632_calc_ambient_dsp105(data, val);
> + if (ret < 0)
> + return ret;
> + return IIO_VAL_INT;
> + case IIO_MOD_TEMP_OBJECT:
> + ret = mlx90632_calc_object_dsp105(data, val);
> + if (ret < 0)
> + return ret;
> + return IIO_VAL_INT;
> + default:
> + return -EINVAL;
> + }
> + case IIO_CHAN_INFO_CALIBEMISSIVITY:
> + if (data->emissivity == 1000) {
> + *val = 1;
> + *val2 = 0;
> + } else {
> + *val = 0;
> + *val2 = data->emissivity * 1000;
> + }
> + return IIO_VAL_INT_PLUS_MICRO;
> +
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mlx90632_write_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *channel, int val,
> + int val2, long mask)
> +{
> + struct mlx90632_data *data = iio_priv(indio_dev);
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_CALIBEMISSIVITY:
> + /* Confirm we are within 0 and 1.0 */
> + if (val < 0 || val2 < 0 || val > 1 ||
> + (val == 1 && val2 != 0))
> + return -EINVAL;
> + data->emissivity = val * 1000 + val2 / 1000;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static const struct iio_chan_spec mlx90632_channels[] = {
> + {
> + .type = IIO_TEMP,
> + .modified = 1,
> + .channel2 = IIO_MOD_TEMP_AMBIENT,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> + },
> + {
> + .type = IIO_TEMP,
> + .modified = 1,
> + .channel2 = IIO_MOD_TEMP_OBJECT,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> + BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
> + },
> +};
> +
> +static const struct iio_info mlx90632_info = {
> + .read_raw = mlx90632_read_raw,
> + .write_raw = mlx90632_write_raw,
> +};
> +
> +#ifdef CONFIG_PM
> +static int mlx90632_sleep(struct mlx90632_data *data)
> +{
> + dev_dbg(&data->client->dev, "Requesting sleep");
> + return mlx90632_pwr_set_sleep_step(data->regmap);
> +}
> +
> +static int mlx90632_wakeup(struct mlx90632_data *data)
> +{
> + dev_dbg(&data->client->dev, "Requesting wake-up");
> + return mlx90632_pwr_continuous(data->regmap);
> +}
> +#endif
> +
> +static int mlx90632_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct iio_dev *indio_dev;
> + struct mlx90632_data *mlx90632;
> + struct regmap *regmap;
> + int ret;
> + unsigned int read;
> +
> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
> + if (!indio_dev) {
> + dev_err(&client->dev, "Failed to allocate device");
> + return -ENOMEM;
> + }
> +
> + regmap = devm_regmap_init_i2c(client, &mlx90632_regmap);
> + if (IS_ERR(regmap)) {
> + ret = PTR_ERR(regmap);
> + dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret);
> + return ret;
> + }
> +
> + mlx90632 = iio_priv(indio_dev);
> + i2c_set_clientdata(client, indio_dev);
> + mlx90632->client = client;
> + mlx90632->regmap = regmap;
> +
> + mutex_init(&mlx90632->lock);
> + mlx90632_wakeup(mlx90632);
> +
> + indio_dev->dev.parent = &client->dev;
> + indio_dev->name = id->name;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->info = &mlx90632_info;
> + indio_dev->channels = mlx90632_channels;
> + indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels);
> +
> + ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read);
> + if (ret < 0) {
> + dev_err(&client->dev, "read of version failed: %d\n", ret);
> + return ret;
> + }
> + /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */
> + if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) {
> + dev_dbg(&client->dev,
> + "Detected Medical EEPROM calibration %x", read);
> + } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) {
> + dev_dbg(&client->dev,
> + "Detected Consumer EEPROM calibration %x", read);
> + } else {
> + dev_err(&client->dev,
> + "Chip EEPROM version mismatch %x (expected %x)",
> + read, MLX90632_EEPROM_VERSION);
> + return -EPROTONOSUPPORT;
> + }
> +
> + mlx90632->emissivity = 1000;
> +
> + return iio_device_register(indio_dev);
> +}
> +
> +static int mlx90632_remove(struct i2c_client *client)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct mlx90632_data *data = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> +
> + pm_runtime_disable(&client->dev);
> + if (!pm_runtime_status_suspended(&client->dev))
> + mlx90632_sleep(data);
> + pm_runtime_set_suspended(&client->dev);
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id mlx90632_id[] = {
> + { "mlx90632", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, mlx90632_id);
> +
> +static const struct of_device_id mlx90632_of_match[] = {
> + { .compatible = "melexis,mlx90632" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, mlx90632_of_match);
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int mlx90632_pm_suspend(struct device *dev)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct mlx90632_data *data = iio_priv(indio_dev);
> +
> + regcache_sync(data->regmap);
> +
> + if (pm_runtime_active(dev))
> + return mlx90632_sleep(data);
> +
> + return 0;
> +}
> +
> +static int mlx90632_pm_resume(struct device *dev)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct mlx90632_data *data = iio_priv(indio_dev);
> + int err;
> +
> + regcache_mark_dirty(data->regmap);
> + regcache_cache_only(data->regmap, false);
> + err = regcache_sync(data->regmap);
> + if (err < 0) {
> + dev_err(dev, "Failed to sync regmap registers: %d\n", err);
> + return err;
> + }
> +
> + err = mlx90632_wakeup(data);
> + if (err < 0)
> + return err;
> +
> + pm_runtime_disable(dev);
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> +
> + return 0;
> +}
> +#endif
> +
> +#ifdef CONFIG_PM
> +static int mlx90632_pm_runtime_suspend(struct device *dev)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
> +
> + regcache_sync(mlx90632->regmap);
> +
> + return mlx90632_sleep(mlx90632);
> +}
> +
> +static int mlx90632_pm_runtime_resume(struct device *dev)
> +{
> + s32 ret;
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
> +
> + regcache_mark_dirty(mlx90632->regmap);
> + regcache_cache_only(mlx90632->regmap, false);
> + ret = regcache_sync(mlx90632->regmap);
> + if (ret < 0) {
> + dev_err(dev, "Failed to sync regmap registers: %d\n", ret);
> + return ret;
> + }
> +
> + return mlx90632_wakeup(mlx90632);
> +}
> +#endif
> +
> +static const struct dev_pm_ops mlx90632_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
> + SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend,
> + mlx90632_pm_runtime_resume, NULL)
> +};
> +
> +static struct i2c_driver mlx90632_driver = {
> + .driver = {
> + .name = "mlx90632",
> + .of_match_table = mlx90632_of_match,
> + .pm = &mlx90632_pm_ops,
> + },
> + .probe = mlx90632_probe,
> + .remove = mlx90632_remove,
> + .id_table = mlx90632_id,
> +};
> +module_i2c_driver(mlx90632_driver);
> +
> +MODULE_AUTHOR("Crt Mori <cmo@melexis.com>");
> +MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver");
> +MODULE_LICENSE("GPL v2");
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v3 1/3] iio: temperature: Adding support for MLX90632
2017-12-10 19:43 ` Jonathan Cameron
@ 2017-12-11 9:18 ` Crt Mori
0 siblings, 0 replies; 3+ messages in thread
From: Crt Mori @ 2017-12-11 9:18 UTC (permalink / raw)
To: Jonathan Cameron; +Cc: Linux Iio
Hi Jonathan,
I have adjusted per your request even other remaining bits. I hope pm
is now looking as it should.
Thanks for noticing that there is no register in the datasheet
(sometimes internal knowledge gets in the way of such things).
I have reordered patches as well (details in cover letter). I think v4
should be final, so make sure you review it ;)
Best regards,
Crt
On 10 December 2017 at 20:43, Jonathan Cameron <jic23@kernel.org> wrote:
> On Wed, 6 Dec 2017 10:54:54 +0100
> Crt Mori <cmo@melexis.com> wrote:
>
>> Melexis has just released Infra Red temperature sensor MLX90632 used
>> for contact-less temperature measurement. Driver provides basic
>> functionality for reporting object (and ambient) temperature with
>> support for object emissivity.
>>
>> Signed-off-by: Crt Mori <cmo@melexis.com>
> Sorry for my rant / review earlier - thought I was looking at V3. oops ;)
>
> Anyhow, much better. A few of the comments from there still apply though
> and I'm out of time to port them over to this version today, so I hope
> you don't mind fishing them out of that review.
>
> Jonathan
>> ---
>> MAINTAINERS | 7 +
>> drivers/iio/temperature/Kconfig | 12 +
>> drivers/iio/temperature/Makefile | 1 +
>> drivers/iio/temperature/mlx90632.c | 787 +++++++++++++++++++++++++++++++++++++
>> 4 files changed, 807 insertions(+)
>> create mode 100644 drivers/iio/temperature/mlx90632.c
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 2d3d750b19c0..81aec02b08b8 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -8690,6 +8690,13 @@ W: http://www.melexis.com
>> S: Supported
>> F: drivers/iio/temperature/mlx90614.c
>>
>> +MELEXIS MLX90632 DRIVER
>> +M: Crt Mori <cmo@melexis.com>
>> +L: linux-iio@vger.kernel.org
>> +W: http://www.melexis.com
>> +S: Supported
>> +F: drivers/iio/temperature/mlx90632.c
>> +
>> MELFAS MIP4 TOUCHSCREEN DRIVER
>> M: Sangwon Jee <jeesw@melfas.com>
>> W: http://www.melfas.com
>> diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig
>> index 5378976d6d27..82e4a62745e2 100644
>> --- a/drivers/iio/temperature/Kconfig
>> +++ b/drivers/iio/temperature/Kconfig
>> @@ -43,6 +43,18 @@ config MLX90614
>> This driver can also be built as a module. If so, the module will
>> be called mlx90614.
>>
>> +config MLX90632
>> + tristate "MLX90632 contact-less infrared sensor with medical accuracy"
>> + depends on I2C
>> + select REGMAP_I2C
>> + help
>> + If you say yes here you get support for the Melexis
>> + MLX90632 contact-less infrared sensor with medical accuracy
>> + connected with I2C.
>> +
>> + This driver can also be built as a module. If so, the module will
>> + be called mlx90632.
>> +
>> config TMP006
>> tristate "TMP006 infrared thermopile sensor"
>> depends on I2C
>> diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile
>> index ad1d668de546..44644fe01bc9 100644
>> --- a/drivers/iio/temperature/Makefile
>> +++ b/drivers/iio/temperature/Makefile
>> @@ -5,6 +5,7 @@
>> obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o
>> obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o
>> obj-$(CONFIG_MLX90614) += mlx90614.o
>> +obj-$(CONFIG_MLX90632) += mlx90632.o
>> obj-$(CONFIG_TMP006) += tmp006.o
>> obj-$(CONFIG_TMP007) += tmp007.o
>> obj-$(CONFIG_TSYS01) += tsys01.o
>> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
>> new file mode 100644
>> index 000000000000..74c23b69f9dc
>> --- /dev/null
>> +++ b/drivers/iio/temperature/mlx90632.c
>> @@ -0,0 +1,787 @@
>> +/*
>> + * mlx90632.c - Melexis MLX90632 contactless IR temperature sensor
>> + *
>> + * Copyright (c) 2017 Melexis <cmo@melexis.com>
>> + *
>> + * This file is subject to the terms and conditions of version 2 of
>> + * the GNU General Public License. See the file COPYING in the main
>> + * directory of this archive for more details.
>> + *
>> + * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
>> + */
>> +#include <linux/delay.h>
>> +#include <linux/err.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/i2c.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/math64.h>
>> +#include <linux/of.h>
>> +#include <linux/pm_runtime.h>
>> +#include <linux/regmap.h>
>> +
>> +#include <linux/iio/iio.h>
>> +#include <linux/iio/sysfs.h>
>> +
>> +/* Memory sections addresses */
>> +#define MLX90632_ADDR_RAM 0x4000 /* Start address of ram */
>> +#define MLX90632_ADDR_EEPROM 0x2480 /* Start address of user eeprom */
>> +
>> +/* EEPROM addresses - used at startup */
>> +#define MLX90632_EE_CTRL 0x24d4 /* Control register initial value */
>> +#define MLX90632_EE_I2C_ADDR 0x24d5 /* I2C address register initial value */
>> +#define MLX90632_EE_VERSION 0x240b /* EEPROM version reg address */
>> +#define MLX90632_EE_P_R 0x240c /* P_R calibration register 32bit */
>> +#define MLX90632_EE_P_G 0x240e /* P_G calibration register 32bit */
>> +#define MLX90632_EE_P_T 0x2410 /* P_T calibration register 32bit */
>> +#define MLX90632_EE_P_O 0x2412 /* P_O calibration register 32bit */
>> +#define MLX90632_EE_Aa 0x2414 /* Aa calibration register 32bit */
>> +#define MLX90632_EE_Ab 0x2416 /* Ab calibration register 32bit */
>> +#define MLX90632_EE_Ba 0x2418 /* Ba calibration register 32bit */
>> +#define MLX90632_EE_Bb 0x241a /* Bb calibration register 32bit */
>> +#define MLX90632_EE_Ca 0x241c /* Ca calibration register 32bit */
>> +#define MLX90632_EE_Cb 0x241e /* Cb calibration register 32bit */
>> +#define MLX90632_EE_Da 0x2420 /* Da calibration register 32bit */
>> +#define MLX90632_EE_Db 0x2422 /* Db calibration register 32bit */
>> +#define MLX90632_EE_Ea 0x2424 /* Ea calibration register 32bit */
>> +#define MLX90632_EE_Eb 0x2426 /* Eb calibration register 32bit */
>> +#define MLX90632_EE_Fa 0x2428 /* Fa calibration register 32bit */
>> +#define MLX90632_EE_Fb 0x242a /* Fb calibration register 32bit */
>> +#define MLX90632_EE_Ga 0x242c /* Ga calibration register 32bit */
>> +
>> +#define MLX90632_EE_Gb 0x242e /* Gb calibration register 16bit */
>> +#define MLX90632_EE_Ka 0x242f /* Ka calibration register 16bit */
>> +
>> +#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
>> +#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
>> +
>> +/* Register addresses - volatile */
>> +#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
>> +
>> +/* Control register address - volatile */
>> +#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
>> +#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
>> +/* PowerModes statuses */
>> +#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
>> +#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
>> +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
>> +#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
>> +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
>> +
>> +/* Device status register - volatile */
>> +#define MLX90632_REG_STATUS 0x3fff /* Device status register */
>> +#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */
>> +#define MLX90632_STAT_EE_BUSY BIT(9) /* EEPROM busy indicator */
>> +#define MLX90632_STAT_BRST BIT(8) /* Brown out reset indicator */
>> +#define MLX90632_STAT_CYCLE_POS GENMASK(6, 2) /* Data position */
>> +#define MLX90632_STAT_DATA_RDY BIT(0) /* Data ready indicator */
>> +
>> +/* RAM_MEAS address-es for each channel */
>> +#define MLX90632_RAM_1(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num)
>> +#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1)
>> +#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2)
>> +
>> +/* Magic constants */
>> +#define MLX90632_EEPROM_VERSION 0xff05 /* EEPROM DSP version for constants */
>> +#define MLX90632_ID_MEDICAL 0x01ff /* EEPROM Medical device id */
>> +#define MLX90632_ID_CONSUMER 0x02ff /* EEPROM Consumer device id */
>> +#define MLX90632_EEPROM_WRITE_KEY 0x554C /* EEPROM write key 0x55 and 0x4c */
>> +#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */
>> +#define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */
>> +#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */
>> +#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */
>> +
>> +struct mlx90632_data {
>> + struct i2c_client *client;
>> + struct mutex lock; /* Multiple reads for single measurement */
>> + struct regmap *regmap;
>> + u16 emissivity;
>> +};
>> +
>> +static const struct regmap_range mlx90632_volatile_reg_range[] = {
>> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
>> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
>> + regmap_reg_range(MLX90632_RAM_1(0),
>> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
>> +};
>> +
>> +static const struct regmap_access_table mlx90632_volatile_regs_tbl = {
>> + .yes_ranges = mlx90632_volatile_reg_range,
>> + .n_yes_ranges = ARRAY_SIZE(mlx90632_volatile_reg_range),
>> +};
>> +
>> +static const struct regmap_range mlx90632_read_reg_range[] = {
>> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
>> + regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
>> + regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
>> + regmap_reg_range(MLX90632_REG_CONTROL, MLX90632_REG_I2C_ADDR),
>> + regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
>> + regmap_reg_range(MLX90632_RAM_1(0),
>> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
>> +};
>> +
>> +static const struct regmap_access_table mlx90632_readable_regs_tbl = {
>> + .yes_ranges = mlx90632_read_reg_range,
>> + .n_yes_ranges = ARRAY_SIZE(mlx90632_read_reg_range),
>> +};
>> +
>> +static const struct regmap_range mlx90632_no_write_reg_range[] = {
>> + regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
>> + regmap_reg_range(MLX90632_RAM_1(0),
>> + MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
>> +};
>> +
>> +static const struct regmap_access_table mlx90632_writeable_regs_tbl = {
>> + .no_ranges = mlx90632_no_write_reg_range,
>> + .n_no_ranges = ARRAY_SIZE(mlx90632_no_write_reg_range),
>> +};
>> +
>> +static const struct regmap_config mlx90632_regmap = {
>> + .reg_bits = 16,
>> + .val_bits = 16,
>> +
>> + .volatile_table = &mlx90632_volatile_regs_tbl,
>> + .rd_table = &mlx90632_readable_regs_tbl,
>> + .wr_table = &mlx90632_writeable_regs_tbl,
>> +
>> + .use_single_rw = true,
>> + .reg_format_endian = REGMAP_ENDIAN_BIG,
>> + .val_format_endian = REGMAP_ENDIAN_BIG,
>> + .cache_type = REGCACHE_RBTREE,
>> +};
>> +
>> +static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
>> +{
>> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
>> + MLX90632_CFG_PWR_MASK,
>> + MLX90632_PWR_STATUS_SLEEP_STEP);
>> +}
>> +
>> +static s32 mlx90632_pwr_continuous(struct regmap *regmap)
>> +{
>> + return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
>> + MLX90632_CFG_PWR_MASK,
>> + MLX90632_PWR_STATUS_CONTINUOUS);
>> +}
>> +
>> +/**
>> + * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle
>> + * @*data: pointer to mlx90632_data object containing regmap information
>> + *
>> + * Perform a measurement and return latest measurement cycle position reported
>> + * by sensor. This is a blocking function for 500ms, as that is default sensor
>> + * refresh rate.
>> + */
>> +static int mlx90632_perform_measurement(struct mlx90632_data *data)
>> +{
>> + int ret, tries = 100;
>> + unsigned int reg_status;
>> +
>> + ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
>> + MLX90632_STAT_DATA_RDY, 0);
>> + if (ret < 0)
>> + return ret;
>> +
>> + while (tries-- > 0) {
>> + ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
>> + ®_status);
>> + if (ret < 0)
>> + return ret;
>> + if (reg_status & MLX90632_STAT_DATA_RDY)
>> + break;
>> + usleep_range(10000, 11000);
>> + }
>> +
>> + if (tries < 0) {
>> + dev_err(&data->client->dev, "data not ready");
>> + return -ETIMEDOUT;
>> + }
>> +
>> + return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
>> +}
>> +
>> +static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
>> + uint8_t *channel_old)
>> +{
>> + switch (perform_ret) {
>> + case 1:
>> + *channel_new = 1;
>> + *channel_old = 2;
>> + break;
>> + case 2:
>> + *channel_new = 2;
>> + *channel_old = 1;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int mlx90632_read_ambient_raw(struct regmap *regmap,
>> + s16 *ambient_new_raw, s16 *ambient_old_raw)
>> +{
>> + int ret;
>> + unsigned int read_tmp;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + *ambient_new_raw = (s16)read_tmp;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_3(2), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + *ambient_old_raw = (s16)read_tmp;
>> +
>> + return ret;
>> +}
>> +
>> +static int mlx90632_read_object_raw(struct regmap *regmap,
>> + int perform_measurement_ret,
>> + s16 *object_new_raw, s16 *object_old_raw)
>> +{
>> + int ret;
>> + unsigned int read_tmp;
>> + s16 read;
>> + u8 channel = 0;
>> + u8 channel_old = 0;
>> +
>> + ret = mlx90632_channel_new_select(perform_measurement_ret, &channel,
>> + &channel_old);
>> + if (ret != 0)
>> + return ret;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_2(channel), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> +
>> + read = (s16)read_tmp;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_1(channel), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + *object_new_raw = (read + (s16)read_tmp) / 2;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_2(channel_old), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + read = (s16)read_tmp;
>> +
>> + ret = regmap_read(regmap, MLX90632_RAM_1(channel_old), &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + *object_old_raw = (read + (s16)read_tmp) / 2;
>> +
>> + return ret;
>> +}
>> +
>> +static int mlx90632_read_all_channel(struct mlx90632_data *data,
>> + s16 *ambient_new_raw, s16 *ambient_old_raw,
>> + s16 *object_new_raw, s16 *object_old_raw)
>> +{
>> + s32 ret, measurement;
>> +
>> + mutex_lock(&data->lock);
>> + measurement = mlx90632_perform_measurement(data);
>> + if (measurement < 0) {
>> + ret = measurement;
>> + goto read_unlock;
>> + }
>> + ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
>> + ambient_old_raw);
>> + if (ret < 0)
>> + goto read_unlock;
>> +
>> + ret = mlx90632_read_object_raw(data->regmap, measurement,
>> + object_new_raw, object_old_raw);
>> +read_unlock:
>> + mutex_unlock(&data->lock);
>> + return ret;
>> +}
>> +
>> +static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
>> + s32 *reg_value)
>> +{
>> + s32 ret;
>> + unsigned int read;
>> + u32 value;
>> +
>> + ret = regmap_read(regmap, reg_lsb, &read);
>> + if (ret < 0)
>> + return ret;
>> +
>> + value = read;
>> +
>> + ret = regmap_read(regmap, reg_lsb + 1, &read);
>> + if (ret < 0)
>> + return ret;
>> +
>> + *reg_value = (read << 16) | (value & 0xffff);
>> +
>> + return 0;
>> +}
>> +
>> +static s64 mlx90632_preprocess_temp_amb(s16 ambient_new_raw,
>> + s16 ambient_old_raw, s16 Gb)
>> +{
>> + s64 VR_Ta, kGb, tmp;
>> +
>> + kGb = ((s64)Gb * 1000LL) >> 10ULL;
>> + VR_Ta = (s64)ambient_old_raw * 1000000LL +
>> + kGb * div64_s64(((s64)ambient_new_raw * 1000LL),
>> + (MLX90632_REF_3));
>> + tmp = div64_s64(
>> + div64_s64(((s64)ambient_new_raw * 1000000000000LL),
>> + (MLX90632_REF_3)), VR_Ta);
>> + return div64_s64(tmp << 19ULL, 1000LL);
>> +}
>> +
>> +static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw,
>> + s16 ambient_new_raw,
>> + s16 ambient_old_raw, s16 Ka)
>> +{
>> + s64 VR_IR, kKa, tmp;
>> +
>> + kKa = ((s64)Ka * 1000LL) >> 10ULL;
>> + VR_IR = (s64)ambient_old_raw * 1000000LL +
>> + kKa * div64_s64(((s64)ambient_new_raw * 1000LL),
>> + (MLX90632_REF_3));
>> + tmp = div64_s64(
>> + div64_s64(((s64)((object_new_raw + object_old_raw) / 2)
>> + * 1000000000000LL), (MLX90632_REF_12)),
>> + VR_IR);
>> + return div64_s64((tmp << 19ULL), 1000LL);
>> +}
>> +
>> +static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
>> + s32 P_T, s32 P_R, s32 P_G, s32 P_O,
>> + s16 Gb)
>> +{
>> + s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
>> +
>> + AMB = mlx90632_preprocess_temp_amb(ambient_new_raw, ambient_old_raw,
>> + Gb);
>> + Asub = ((s64)P_T * 10000000000LL) >> 44ULL;
>> + Bsub = AMB - (((s64)P_R * 1000LL) >> 8ULL);
>> + Ablock = Asub * (Bsub * Bsub);
>> + Bblock = (div64_s64(Bsub * 10000000LL, P_G)) << 20ULL;
>> + Cblock = ((s64)P_O * 10000000000LL) >> 8ULL;
>> +
>> + sum = div64_s64(Ablock, 1000000LL) + Bblock + Cblock;
>> +
>> + return div64_s64(sum, 10000000LL);
>> +}
>> +
>> +static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
>> + s64 TAdut, s32 Fa, s32 Fb,
>> + s32 Ga, s16 Ha, s16 Hb,
>> + u16 emissivity)
>> +{
>> + s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
>> + s64 Ha_customer, Hb_customer;
>> +
>> + Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
>> + Hb_customer = ((s64)Hb * 100) >> 10ULL;
>> +
>> + calcedKsTO = ((s64)((s64)Ga * (prev_object_temp - 25 * 1000LL)
>> + * 1000LL)) >> 36LL;
>> + calcedKsTA = ((s64)(Fb * (TAdut - 25 * 1000000LL))) >> 36LL;
>> + Alpha_corr = div64_s64((((s64)(Fa * 10000000000LL) >> 46LL)
>> + * Ha_customer), 1000LL);
>> + Alpha_corr *= ((s64)(1 * 1000000LL + calcedKsTO + calcedKsTA));
>> + Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL);
>> + Alpha_corr = div64_s64(Alpha_corr, 1000LL);
>> + ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr);
>> + TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) *
>> + (div64_s64(TAdut, 10000LL) + 27315) *
>> + (div64_s64(TAdut, 10000LL) + 27315) *
>> + (div64_s64(TAdut, 10000LL) + 27315);
>> +
>> + return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
>> + - 27315 - Hb_customer) * 10;
>> +}
>> +
>> +static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
>> + s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
>> + u16 tmp_emi)
>> +{
>> + s64 kTA, kTA0, TAdut;
>> + s64 temp = 25000;
>> + s8 i;
>> +
>> + kTA = (Ea * 1000LL) >> 16LL;
>> + kTA0 = (Eb * 1000LL) >> 8LL;
>> + TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
>> +
>> + /* Iterations of calculation as described in datasheet */
>> + for (i = 0; i < 5; ++i) {
>> + temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
>> + Fa, Fb, Ga, Ha, Hb,
>> + tmp_emi);
>> + }
>> + return temp;
>> +}
>> +
>> +static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
>> +{
>> + s32 ret;
>> + s32 Ea, Eb, Fa, Fb, Ga;
>> + unsigned int read_tmp;
>> + s16 Ha, Hb, Gb, Ka;
>> + s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw;
>> + s64 object, ambient;
>> +
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Eb, &Eb);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fa, &Fa);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Fb, &Fb);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ga, &Ga);
>> + if (ret < 0)
>> + return ret;
>> + ret = regmap_read(data->regmap, MLX90632_EE_Ha, &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + Ha = (s16)read_tmp;
>> + ret = regmap_read(data->regmap, MLX90632_EE_Hb, &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + Hb = (s16)read_tmp;
>> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + Gb = (s16)read_tmp;
>> + ret = regmap_read(data->regmap, MLX90632_EE_Ka, &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + Ka = (s16)read_tmp;
>> +
>> + ret = mlx90632_read_all_channel(data,
>> + &ambient_new_raw, &ambient_old_raw,
>> + &object_new_raw, &object_old_raw);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
>> + ambient_old_raw, Gb);
>> + object = mlx90632_preprocess_temp_obj(object_new_raw,
>> + object_old_raw,
>> + ambient_new_raw,
>> + ambient_old_raw, Ka);
>> +
>> + *val = mlx90632_calc_temp_object(object, ambient, Ea, Eb, Fa, Fb, Ga,
>> + Ha, Hb, data->emissivity);
>> + return 0;
>> +}
>> +
>> +static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
>> +{
>> + s32 ret;
>> + unsigned int read_tmp;
>> + s32 PT, PR, PG, PO;
>> + s16 Gb;
>> + s16 ambient_new_raw, ambient_old_raw;
>> +
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_G, &PG);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_T, &PT);
>> + if (ret < 0)
>> + return ret;
>> + ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_O, &PO);
>> + if (ret < 0)
>> + return ret;
>> + ret = regmap_read(data->regmap, MLX90632_EE_Gb, &read_tmp);
>> + if (ret < 0)
>> + return ret;
>> + Gb = (s16)read_tmp;
>> +
>> + ret = mlx90632_read_ambient_raw(data->regmap, &ambient_new_raw,
>> + &ambient_old_raw);
>> + *val = mlx90632_calc_temp_ambient(ambient_new_raw, ambient_old_raw,
>> + PT, PR, PG, PO, Gb);
>> + return ret;
>> +}
>> +
>> +static int mlx90632_read_raw(struct iio_dev *indio_dev,
>> + struct iio_chan_spec const *channel, int *val,
>> + int *val2, long mask)
>> +{
>> + struct mlx90632_data *data = iio_priv(indio_dev);
>> + int ret;
>> +
>> + switch (mask) {
>> + case IIO_CHAN_INFO_PROCESSED:
>> + switch (channel->channel2) {
>> + case IIO_MOD_TEMP_AMBIENT:
>> + ret = mlx90632_calc_ambient_dsp105(data, val);
>> + if (ret < 0)
>> + return ret;
>> + return IIO_VAL_INT;
>> + case IIO_MOD_TEMP_OBJECT:
>> + ret = mlx90632_calc_object_dsp105(data, val);
>> + if (ret < 0)
>> + return ret;
>> + return IIO_VAL_INT;
>> + default:
>> + return -EINVAL;
>> + }
>> + case IIO_CHAN_INFO_CALIBEMISSIVITY:
>> + if (data->emissivity == 1000) {
>> + *val = 1;
>> + *val2 = 0;
>> + } else {
>> + *val = 0;
>> + *val2 = data->emissivity * 1000;
>> + }
>> + return IIO_VAL_INT_PLUS_MICRO;
>> +
>> + default:
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static int mlx90632_write_raw(struct iio_dev *indio_dev,
>> + struct iio_chan_spec const *channel, int val,
>> + int val2, long mask)
>> +{
>> + struct mlx90632_data *data = iio_priv(indio_dev);
>> +
>> + switch (mask) {
>> + case IIO_CHAN_INFO_CALIBEMISSIVITY:
>> + /* Confirm we are within 0 and 1.0 */
>> + if (val < 0 || val2 < 0 || val > 1 ||
>> + (val == 1 && val2 != 0))
>> + return -EINVAL;
>> + data->emissivity = val * 1000 + val2 / 1000;
>> + return 0;
>> + default:
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static const struct iio_chan_spec mlx90632_channels[] = {
>> + {
>> + .type = IIO_TEMP,
>> + .modified = 1,
>> + .channel2 = IIO_MOD_TEMP_AMBIENT,
>> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
>> + },
>> + {
>> + .type = IIO_TEMP,
>> + .modified = 1,
>> + .channel2 = IIO_MOD_TEMP_OBJECT,
>> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
>> + BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
>> + },
>> +};
>> +
>> +static const struct iio_info mlx90632_info = {
>> + .read_raw = mlx90632_read_raw,
>> + .write_raw = mlx90632_write_raw,
>> +};
>> +
>> +#ifdef CONFIG_PM
>> +static int mlx90632_sleep(struct mlx90632_data *data)
>> +{
>> + dev_dbg(&data->client->dev, "Requesting sleep");
>> + return mlx90632_pwr_set_sleep_step(data->regmap);
>> +}
>> +
>> +static int mlx90632_wakeup(struct mlx90632_data *data)
>> +{
>> + dev_dbg(&data->client->dev, "Requesting wake-up");
>> + return mlx90632_pwr_continuous(data->regmap);
>> +}
>> +#endif
>> +
>> +static int mlx90632_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + struct iio_dev *indio_dev;
>> + struct mlx90632_data *mlx90632;
>> + struct regmap *regmap;
>> + int ret;
>> + unsigned int read;
>> +
>> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
>> + if (!indio_dev) {
>> + dev_err(&client->dev, "Failed to allocate device");
>> + return -ENOMEM;
>> + }
>> +
>> + regmap = devm_regmap_init_i2c(client, &mlx90632_regmap);
>> + if (IS_ERR(regmap)) {
>> + ret = PTR_ERR(regmap);
>> + dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + mlx90632 = iio_priv(indio_dev);
>> + i2c_set_clientdata(client, indio_dev);
>> + mlx90632->client = client;
>> + mlx90632->regmap = regmap;
>> +
>> + mutex_init(&mlx90632->lock);
>> + mlx90632_wakeup(mlx90632);
>> +
>> + indio_dev->dev.parent = &client->dev;
>> + indio_dev->name = id->name;
>> + indio_dev->modes = INDIO_DIRECT_MODE;
>> + indio_dev->info = &mlx90632_info;
>> + indio_dev->channels = mlx90632_channels;
>> + indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels);
>> +
>> + ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read);
>> + if (ret < 0) {
>> + dev_err(&client->dev, "read of version failed: %d\n", ret);
>> + return ret;
>> + }
>> + /* Higher 8 bits are ID, lower 8 bits are EEPROM_VERSION */
>> + if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_MEDICAL)) {
>> + dev_dbg(&client->dev,
>> + "Detected Medical EEPROM calibration %x", read);
>> + } else if (read == (MLX90632_EEPROM_VERSION & MLX90632_ID_CONSUMER)) {
>> + dev_dbg(&client->dev,
>> + "Detected Consumer EEPROM calibration %x", read);
>> + } else {
>> + dev_err(&client->dev,
>> + "Chip EEPROM version mismatch %x (expected %x)",
>> + read, MLX90632_EEPROM_VERSION);
>> + return -EPROTONOSUPPORT;
>> + }
>> +
>> + mlx90632->emissivity = 1000;
>> +
>> + return iio_device_register(indio_dev);
>> +}
>> +
>> +static int mlx90632_remove(struct i2c_client *client)
>> +{
>> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
>> + struct mlx90632_data *data = iio_priv(indio_dev);
>> +
>> + iio_device_unregister(indio_dev);
>> +
>> + pm_runtime_disable(&client->dev);
>> + if (!pm_runtime_status_suspended(&client->dev))
>> + mlx90632_sleep(data);
>> + pm_runtime_set_suspended(&client->dev);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id mlx90632_id[] = {
>> + { "mlx90632", 0 },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(i2c, mlx90632_id);
>> +
>> +static const struct of_device_id mlx90632_of_match[] = {
>> + { .compatible = "melexis,mlx90632" },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(of, mlx90632_of_match);
>> +
>> +#ifdef CONFIG_PM_SLEEP
>> +static int mlx90632_pm_suspend(struct device *dev)
>> +{
>> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
>> + struct mlx90632_data *data = iio_priv(indio_dev);
>> +
>> + regcache_sync(data->regmap);
>> +
>> + if (pm_runtime_active(dev))
>> + return mlx90632_sleep(data);
>> +
>> + return 0;
>> +}
>> +
>> +static int mlx90632_pm_resume(struct device *dev)
>> +{
>> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
>> + struct mlx90632_data *data = iio_priv(indio_dev);
>> + int err;
>> +
>> + regcache_mark_dirty(data->regmap);
>> + regcache_cache_only(data->regmap, false);
>> + err = regcache_sync(data->regmap);
>> + if (err < 0) {
>> + dev_err(dev, "Failed to sync regmap registers: %d\n", err);
>> + return err;
>> + }
>> +
>> + err = mlx90632_wakeup(data);
>> + if (err < 0)
>> + return err;
>> +
>> + pm_runtime_disable(dev);
>> + pm_runtime_set_active(dev);
>> + pm_runtime_enable(dev);
>> +
>> + return 0;
>> +}
>> +#endif
>> +
>> +#ifdef CONFIG_PM
>> +static int mlx90632_pm_runtime_suspend(struct device *dev)
>> +{
>> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
>> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
>> +
>> + regcache_sync(mlx90632->regmap);
>> +
>> + return mlx90632_sleep(mlx90632);
>> +}
>> +
>> +static int mlx90632_pm_runtime_resume(struct device *dev)
>> +{
>> + s32 ret;
>> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
>> + struct mlx90632_data *mlx90632 = iio_priv(indio_dev);
>> +
>> + regcache_mark_dirty(mlx90632->regmap);
>> + regcache_cache_only(mlx90632->regmap, false);
>> + ret = regcache_sync(mlx90632->regmap);
>> + if (ret < 0) {
>> + dev_err(dev, "Failed to sync regmap registers: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + return mlx90632_wakeup(mlx90632);
>> +}
>> +#endif
>> +
>> +static const struct dev_pm_ops mlx90632_pm_ops = {
>> + SET_SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
>> + SET_RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend,
>> + mlx90632_pm_runtime_resume, NULL)
>> +};
>> +
>> +static struct i2c_driver mlx90632_driver = {
>> + .driver = {
>> + .name = "mlx90632",
>> + .of_match_table = mlx90632_of_match,
>> + .pm = &mlx90632_pm_ops,
>> + },
>> + .probe = mlx90632_probe,
>> + .remove = mlx90632_remove,
>> + .id_table = mlx90632_id,
>> +};
>> +module_i2c_driver(mlx90632_driver);
>> +
>> +MODULE_AUTHOR("Crt Mori <cmo@melexis.com>");
>> +MODULE_DESCRIPTION("Melexis MLX90632 contactless Infra Red temperature sensor driver");
>> +MODULE_LICENSE("GPL v2");
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-12-11 9:18 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-12-06 9:54 [PATCH v3 1/3] iio: temperature: Adding support for MLX90632 Crt Mori
2017-12-10 19:43 ` Jonathan Cameron
2017-12-11 9:18 ` Crt Mori
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