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path: root/drivers/iio/temperature/mlx90632.c
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Diffstat (limited to 'drivers/iio/temperature/mlx90632.c')
-rw-r--r--drivers/iio/temperature/mlx90632.c806
1 files changed, 696 insertions, 110 deletions
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index eaca6ba06864..b44f7036c2cc 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -6,16 +6,22 @@
*
* Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
*/
+#include <linux/bitfield.h>
#include <linux/delay.h>
+#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/jiffies.h>
#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/math64.h>
-#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -52,18 +58,44 @@
#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
+#define MLX90632_EE_MEDICAL_MEAS1 0x24E1 /* Medical measurement 1 16bit */
+#define MLX90632_EE_MEDICAL_MEAS2 0x24E2 /* Medical measurement 2 16bit */
+#define MLX90632_EE_EXTENDED_MEAS1 0x24F1 /* Extended measurement 1 16bit */
+#define MLX90632_EE_EXTENDED_MEAS2 0x24F2 /* Extended measurement 2 16bit */
+#define MLX90632_EE_EXTENDED_MEAS3 0x24F3 /* Extended measurement 3 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 */
+#define MLX90632_CFG_MTYP_MASK GENMASK(8, 4) /* Meas select Mask */
+#define MLX90632_CFG_SOB_MASK BIT(11)
+
/* 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_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*/
+#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
+
+#define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
+#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val)
+ /* Extract Refresh Rate from ee register */
+#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8)
+
+/* Measurement types */
+#define MLX90632_MTYP_MEDICAL 0
+#define MLX90632_MTYP_EXTENDED 17
+
+/* Measurement type select*/
+#define MLX90632_MTYP_STATUS(ctrl_val) (ctrl_val << 4)
+#define MLX90632_MTYP_STATUS_MEDICAL MLX90632_MTYP_STATUS(MLX90632_MTYP_MEDICAL)
+#define MLX90632_MTYP_STATUS_EXTENDED MLX90632_MTYP_STATUS(MLX90632_MTYP_EXTENDED)
+
+/* I2C command register - volatile */
+#define MLX90632_REG_I2C_CMD 0x3005 /* I2C command Register address */
/* Device status register - volatile */
#define MLX90632_REG_STATUS 0x3fff /* Device status register */
@@ -78,26 +110,61 @@
#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)
+/* Name important RAM_MEAS channels */
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1 MLX90632_RAM_3(17)
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2 MLX90632_RAM_3(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_1 MLX90632_RAM_1(17)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_2 MLX90632_RAM_2(17)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_3 MLX90632_RAM_1(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_4 MLX90632_RAM_2(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_5 MLX90632_RAM_1(19)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_6 MLX90632_RAM_2(19)
+
/* Magic constants */
#define MLX90632_ID_MEDICAL 0x0105 /* EEPROM DSPv5 Medical device id */
#define MLX90632_ID_CONSUMER 0x0205 /* EEPROM DSPv5 Consumer device id */
+#define MLX90632_ID_EXTENDED 0x0505 /* EEPROM DSPv5 Extended range device id */
+#define MLX90632_ID_MASK GENMASK(14, 0) /* DSP version and device ID in EE_VERSION */
#define MLX90632_DSP_VERSION 5 /* DSP version */
#define MLX90632_DSP_MASK GENMASK(7, 0) /* DSP version in EE_VERSION */
#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 */
-#define MLX90632_SLEEP_DELAY_MS 3000 /**< Autosleep delay */
+#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 */
+#define MLX90632_SLEEP_DELAY_MS 6000 /* Autosleep delay */
+#define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
+#define MLX90632_MEAS_MAX_TIME 2000 /* Max measurement time in ms for the lowest refresh rate */
+/**
+ * struct mlx90632_data - private data for the MLX90632 device
+ * @client: I2C client of the device
+ * @lock: Internal mutex for multiple reads for single measurement
+ * @regmap: Regmap of the device
+ * @emissivity: Object emissivity from 0 to 1000 where 1000 = 1.
+ * @mtyp: Measurement type physical sensor configuration for extended range
+ * calculations
+ * @object_ambient_temperature: Ambient temperature at object (might differ of
+ * the ambient temperature of sensor.
+ * @regulator: Regulator of the device
+ * @powerstatus: Current POWER status of the device
+ * @interaction_ts: Timestamp of the last temperature read that is used
+ * for power management in jiffies
+ */
struct mlx90632_data {
struct i2c_client *client;
- struct mutex lock; /* Multiple reads for single measurement */
+ struct mutex lock;
struct regmap *regmap;
u16 emissivity;
+ u8 mtyp;
+ u32 object_ambient_temperature;
+ struct regulator *regulator;
+ int powerstatus;
+ unsigned long interaction_ts;
};
static const struct regmap_range mlx90632_volatile_reg_range[] = {
regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
+ regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
regmap_reg_range(MLX90632_RAM_1(0),
MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
@@ -112,7 +179,10 @@ 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_EE_MEDICAL_MEAS1, MLX90632_EE_MEDICAL_MEAS2),
+ regmap_reg_range(MLX90632_EE_EXTENDED_MEAS1, MLX90632_EE_EXTENDED_MEAS3),
regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
+ regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
regmap_reg_range(MLX90632_RAM_1(0),
MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
@@ -149,23 +219,111 @@ static const struct regmap_config mlx90632_regmap = {
.cache_type = REGCACHE_RBTREE,
};
-static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
+static int mlx90632_pwr_set_sleep_step(struct regmap *regmap)
+{
+ struct mlx90632_data *data =
+ iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
+ int ret;
+
+ if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
+ return 0;
+
+ ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_SLEEP_STEP);
+ if (ret < 0)
+ return ret;
+
+ data->powerstatus = MLX90632_PWR_STATUS_SLEEP_STEP;
+ return 0;
+}
+
+static int mlx90632_pwr_continuous(struct regmap *regmap)
+{
+ struct mlx90632_data *data =
+ iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
+ int ret;
+
+ if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS)
+ return 0;
+
+ ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_CONTINUOUS);
+ if (ret < 0)
+ return ret;
+
+ data->powerstatus = MLX90632_PWR_STATUS_CONTINUOUS;
+ return 0;
+}
+
+/**
+ * mlx90632_reset_delay() - Give the mlx90632 some time to reset properly
+ * If this is not done, the following I2C command(s) will not be accepted.
+ */
+static void mlx90632_reset_delay(void)
{
- return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
- MLX90632_CFG_PWR_MASK,
- MLX90632_PWR_STATUS_SLEEP_STEP);
+ usleep_range(150, 200);
}
-static s32 mlx90632_pwr_continuous(struct regmap *regmap)
+static int mlx90632_get_measurement_time(struct regmap *regmap, u16 meas)
{
- return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
- MLX90632_CFG_PWR_MASK,
- MLX90632_PWR_STATUS_CONTINUOUS);
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(regmap, meas, &reg);
+ if (ret < 0)
+ return ret;
+
+ return MLX90632_MEAS_MAX_TIME >> FIELD_GET(MLX90632_EE_RR, reg);
+}
+
+static int mlx90632_calculate_dataset_ready_time(struct mlx90632_data *data)
+{
+ unsigned int refresh_time;
+ int ret;
+
+ if (data->mtyp == MLX90632_MTYP_MEDICAL) {
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_MEDICAL_MEAS1);
+ if (ret < 0)
+ return ret;
+
+ refresh_time = ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_MEDICAL_MEAS2);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+ } else {
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS1);
+ if (ret < 0)
+ return ret;
+
+ refresh_time = ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS2);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS3);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+ }
+
+ return refresh_time;
}
/**
- * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle
- * @*data: pointer to mlx90632_data object containing regmap information
+ * 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
@@ -173,25 +331,19 @@ static s32 mlx90632_pwr_continuous(struct regmap *regmap)
*/
static int mlx90632_perform_measurement(struct mlx90632_data *data)
{
- int ret, tries = 100;
unsigned int reg_status;
+ int ret;
- ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
- MLX90632_STAT_DATA_RDY, 0);
+ ret = regmap_clear_bits(data->regmap, MLX90632_REG_STATUS,
+ MLX90632_STAT_DATA_RDY);
if (ret < 0)
return ret;
- while (tries-- > 0) {
- ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
- &reg_status);
- if (ret < 0)
- return ret;
- if (reg_status & MLX90632_STAT_DATA_RDY)
- break;
- usleep_range(10000, 11000);
- }
+ ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS, reg_status,
+ !(reg_status & MLX90632_STAT_DATA_RDY), 10000,
+ 100 * 10000);
- if (tries < 0) {
+ if (ret < 0) {
dev_err(&data->client->dev, "data not ready");
return -ETIMEDOUT;
}
@@ -199,6 +351,77 @@ static int mlx90632_perform_measurement(struct mlx90632_data *data)
return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
}
+/**
+ * mlx90632_perform_measurement_burst() - Trigger and retrieve current measurement
+ * cycle in step sleep mode
+ * @data: pointer to mlx90632_data object containing regmap information
+ *
+ * Perform a measurement and return 2 as measurement cycle position reported
+ * by sensor. This is a blocking function for amount dependent on the sensor
+ * refresh rate.
+ */
+static int mlx90632_perform_measurement_burst(struct mlx90632_data *data)
+{
+ unsigned int reg_status;
+ int ret;
+
+ ret = regmap_write_bits(data->regmap, MLX90632_REG_CONTROL,
+ MLX90632_CFG_SOB_MASK, MLX90632_CFG_SOB_MASK);
+ if (ret < 0)
+ return ret;
+
+ ret = mlx90632_calculate_dataset_ready_time(data);
+ if (ret < 0)
+ return ret;
+
+ msleep(ret); /* Wait minimum time for dataset to be ready */
+
+ ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
+ reg_status,
+ (reg_status & MLX90632_STAT_BUSY) == 0,
+ 10000, 100 * 10000);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "data not ready");
+ return -ETIMEDOUT;
+ }
+
+ return 2;
+}
+
+static int mlx90632_set_meas_type(struct mlx90632_data *data, u8 type)
+{
+ int current_powerstatus;
+ int ret;
+
+ if (data->mtyp == type)
+ return 0;
+
+ current_powerstatus = data->powerstatus;
+ ret = mlx90632_pwr_continuous(data->regmap);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_write(data->regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
+ if (ret < 0)
+ return ret;
+
+ mlx90632_reset_delay();
+
+ ret = regmap_update_bits(data->regmap, MLX90632_REG_CONTROL,
+ (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
+ (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
+ if (ret < 0)
+ return ret;
+
+ data->mtyp = type;
+ data->powerstatus = MLX90632_PWR_STATUS_HALT;
+
+ if (current_powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
+ return mlx90632_pwr_set_sleep_step(data->regmap);
+
+ return mlx90632_pwr_continuous(data->regmap);
+}
+
static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
uint8_t *channel_old)
{
@@ -212,7 +435,7 @@ static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
*channel_old = 1;
break;
default:
- return -EINVAL;
+ return -ECHRNG;
}
return 0;
@@ -221,8 +444,8 @@ static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
static int mlx90632_read_ambient_raw(struct regmap *regmap,
s16 *ambient_new_raw, s16 *ambient_old_raw)
{
- int ret;
unsigned int read_tmp;
+ int ret;
ret = regmap_read(regmap, MLX90632_RAM_3(1), &read_tmp);
if (ret < 0)
@@ -241,11 +464,11 @@ 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;
+ u8 channel = 0;
+ s16 read;
+ int ret;
ret = mlx90632_channel_new_select(perform_measurement_ret, &channel,
&channel_old);
@@ -280,14 +503,34 @@ 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;
+ s32 measurement;
+ int ret;
mutex_lock(&data->lock);
- measurement = mlx90632_perform_measurement(data);
- if (measurement < 0) {
- ret = measurement;
+ ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
+ if (ret < 0)
+ goto read_unlock;
+
+ switch (data->powerstatus) {
+ case MLX90632_PWR_STATUS_CONTINUOUS:
+ ret = mlx90632_perform_measurement(data);
+ if (ret < 0)
+ goto read_unlock;
+
+ break;
+ case MLX90632_PWR_STATUS_SLEEP_STEP:
+ ret = mlx90632_perform_measurement_burst(data);
+ if (ret < 0)
+ goto read_unlock;
+
+ break;
+ default:
+ ret = -EOPNOTSUPP;
goto read_unlock;
}
+
+ measurement = ret; /* If we came here ret holds the measurement position */
+
ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
ambient_old_raw);
if (ret < 0)
@@ -300,12 +543,113 @@ read_unlock:
return ret;
}
+static int mlx90632_read_ambient_raw_extended(struct regmap *regmap,
+ s16 *ambient_new_raw, s16 *ambient_old_raw)
+{
+ unsigned int read_tmp;
+ int ret;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1, &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_new_raw = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2, &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_old_raw = (s16)read_tmp;
+
+ return 0;
+}
+
+static int mlx90632_read_object_raw_extended(struct regmap *regmap, s16 *object_new_raw)
+{
+ unsigned int read_tmp;
+ s32 read;
+ int ret;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_1, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_2, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read - (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_3, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read - (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_4, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = (read + (s16)read_tmp) / 2;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_5, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read + (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_6, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read + (s16)read_tmp;
+
+ if (read > S16_MAX || read < S16_MIN)
+ return -ERANGE;
+
+ *object_new_raw = read;
+
+ return 0;
+}
+
+static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *object_new_raw,
+ s16 *ambient_new_raw, s16 *ambient_old_raw)
+{
+ s32 ret, meas;
+
+ mutex_lock(&data->lock);
+ ret = mlx90632_set_meas_type(data, MLX90632_MTYP_EXTENDED);
+ if (ret < 0)
+ goto read_unlock;
+
+ switch (data->powerstatus) {
+ case MLX90632_PWR_STATUS_CONTINUOUS:
+ ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
+ 50000, 800000, false, data);
+ if (ret)
+ goto read_unlock;
+ break;
+ case MLX90632_PWR_STATUS_SLEEP_STEP:
+ ret = mlx90632_perform_measurement_burst(data);
+ if (ret < 0)
+ goto read_unlock;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ goto read_unlock;
+ }
+
+ ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
+ if (ret < 0)
+ goto read_unlock;
+
+ ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_old_raw);
+
+read_unlock:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
s32 *reg_value)
{
- s32 ret;
unsigned int read;
u32 value;
+ int ret;
ret = regmap_read(regmap, reg_lsb, &read);
if (ret < 0)
@@ -354,9 +698,23 @@ static s64 mlx90632_preprocess_temp_obj(s16 object_new_raw, s16 object_old_raw,
return div64_s64((tmp << 19ULL), 1000LL);
}
+static s64 mlx90632_preprocess_temp_obj_extended(s16 object_new_raw, s16 ambient_new_raw,
+ s16 ambient_old_raw, s16 Ka)
+{
+ s64 VR_IR, kKa, tmp;
+
+ kKa = ((s64)Ka * 1000LL) >> 10ULL;
+ VR_IR = (s64)ambient_old_raw * 1000000LL +
+ kKa * div64_s64((s64)ambient_new_raw * 1000LL,
+ MLX90632_REF_3);
+ tmp = div64_s64(
+ div64_s64((s64) object_new_raw * 1000000000000LL, MLX90632_REF_12),
+ VR_IR);
+ return div64_s64(tmp << 19ULL, 1000LL);
+}
+
static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
- s32 P_T, s32 P_R, s32 P_G, s32 P_O,
- s16 Gb)
+ s32 P_T, s32 P_R, s32 P_G, s32 P_O, s16 Gb)
{
s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
@@ -374,11 +732,11 @@ static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
}
static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
- s64 TAdut, s32 Fa, s32 Fb,
+ s64 TAdut, s64 TAdut4, s32 Fa, s32 Fb,
s32 Ga, s16 Ha, s16 Hb,
u16 emissivity)
{
- s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
+ s64 calcedKsTO, calcedKsTA, ir_Alpha, Alpha_corr;
s64 Ha_customer, Hb_customer;
Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
@@ -393,44 +751,74 @@ static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
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 s64 mlx90632_calc_ta4(s64 TAdut, s64 scale)
+{
+ return (div64_s64(TAdut, scale) + 27315) *
+ (div64_s64(TAdut, scale) + 27315) *
+ (div64_s64(TAdut, scale) + 27315) *
+ (div64_s64(TAdut, scale) + 27315);
+}
+
static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
u16 tmp_emi)
{
- s64 kTA, kTA0, TAdut;
+ s64 kTA, kTA0, TAdut, TAdut4;
s64 temp = 25000;
s8 i;
kTA = (Ea * 1000LL) >> 16LL;
kTA0 = (Eb * 1000LL) >> 8LL;
TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
+ TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
/* Iterations of calculation as described in datasheet */
for (i = 0; i < 5; ++i) {
- temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
+ temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TAdut4,
Fa, Fb, Ga, Ha, Hb,
tmp_emi);
}
return temp;
}
+static s32 mlx90632_calc_temp_object_extended(s64 object, s64 ambient, s64 reflected,
+ s32 Ea, s32 Eb, s32 Fa, s32 Fb, s32 Ga,
+ s16 Ha, s16 Hb, u16 tmp_emi)
+{
+ s64 kTA, kTA0, TAdut, TAdut4, Tr4, TaTr4;
+ s64 temp = 25000;
+ s8 i;
+
+ kTA = (Ea * 1000LL) >> 16LL;
+ kTA0 = (Eb * 1000LL) >> 8LL;
+ TAdut = div64_s64((ambient - kTA0) * 1000000LL, kTA) + 25 * 1000000LL;
+ Tr4 = mlx90632_calc_ta4(reflected, 10);
+ TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
+ TaTr4 = Tr4 - div64_s64(Tr4 - TAdut4, tmp_emi) * 1000;
+
+ /* Iterations of calculation as described in datasheet */
+ for (i = 0; i < 5; ++i) {
+ temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TaTr4,
+ Fa / 2, Fb, Ga, Ha, Hb,
+ tmp_emi);
+ }
+
+ return temp;
+}
+
static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
{
- s32 ret;
+ s16 ambient_new_raw, ambient_old_raw, object_new_raw, object_old_raw;
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;
+ s16 Ha, Hb, Gb, Ka;
+ int ret;
ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_Ea, &Ea);
if (ret < 0)
@@ -470,6 +858,26 @@ static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
if (ret < 0)
return ret;
+ if (object_new_raw > MLX90632_EXTENDED_LIMIT &&
+ data->mtyp == MLX90632_MTYP_EXTENDED) {
+ ret = mlx90632_read_all_channel_extended(data, &object_new_raw,
+ &ambient_new_raw, &ambient_old_raw);
+ if (ret < 0)
+ return ret;
+
+ /* Use extended mode calculations */
+ ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
+ ambient_old_raw, Gb);
+ object = mlx90632_preprocess_temp_obj_extended(object_new_raw,
+ ambient_new_raw,
+ ambient_old_raw, Ka);
+ *val = mlx90632_calc_temp_object_extended(object, ambient,
+ data->object_ambient_temperature,
+ Ea, Eb, Fa, Fb, Ga,
+ Ha, Hb, data->emissivity);
+ return 0;
+ }
+
ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
ambient_old_raw, Gb);
object = mlx90632_preprocess_temp_obj(object_new_raw,
@@ -484,11 +892,11 @@ static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
{
- s32 ret;
+ s16 ambient_new_raw, ambient_old_raw;
unsigned int read_tmp;
s32 PT, PR, PG, PO;
+ int ret;
s16 Gb;
- s16 ambient_new_raw, ambient_old_raw;
ret = mlx90632_read_ee_register(data->regmap, MLX90632_EE_P_R, &PR);
if (ret < 0)
@@ -516,12 +924,73 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
return ret;
}
+static int mlx90632_get_refresh_rate(struct mlx90632_data *data,
+ int *refresh_rate)
+{
+ unsigned int meas1;
+ int ret;
+
+ ret = regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1);
+ if (ret < 0)
+ return ret;
+
+ *refresh_rate = MLX90632_REFRESH_RATE(meas1);
+
+ return ret;
+}
+
+static const int mlx90632_freqs[][2] = {
+ {0, 500000},
+ {1, 0},
+ {2, 0},
+ {4, 0},
+ {8, 0},
+ {16, 0},
+ {32, 0},
+ {64, 0}
+};
+
+/**
+ * mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
+ * @data: pointer to mlx90632_data object containing interaction_ts information
+ *
+ * Switch to continuous mode when interaction is faster than MLX90632_MEAS_MAX_TIME. Update the
+ * interaction_ts for each function call with the jiffies to enable measurement between function
+ * calls. Initial value of the interaction_ts needs to be set before this function call.
+ */
+static int mlx90632_pm_interraction_wakeup(struct mlx90632_data *data)
+{
+ unsigned long now;
+ int ret;
+
+ now = jiffies;
+ if (time_in_range(now, data->interaction_ts,
+ data->interaction_ts +
+ msecs_to_jiffies(MLX90632_MEAS_MAX_TIME + 100))) {
+ if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
+ ret = mlx90632_pwr_continuous(data->regmap);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ data->interaction_ts = now;
+
+ return 0;
+}
+
static int mlx90632_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *channel, int *val,
int *val2, long mask)
{
struct mlx90632_data *data = iio_priv(indio_dev);
int ret;
+ int cr;
+
+ pm_runtime_get_sync(&data->client->dev);
+ ret = mlx90632_pm_interraction_wakeup(data);
+ if (ret < 0)
+ goto mlx90632_read_raw_pm;
switch (mask) {
case IIO_CHAN_INFO_PROCESSED:
@@ -529,16 +998,22 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
case IIO_MOD_TEMP_AMBIENT:
ret = mlx90632_calc_ambient_dsp105(data, val);
if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ goto mlx90632_read_raw_pm;
+
+ ret = IIO_VAL_INT;
+ break;
case IIO_MOD_TEMP_OBJECT:
ret = mlx90632_calc_object_dsp105(data, val);
if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ goto mlx90632_read_raw_pm;
+
+ ret = IIO_VAL_INT;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+ break;
case IIO_CHAN_INFO_CALIBEMISSIVITY:
if (data->emissivity == 1000) {
*val = 1;
@@ -547,11 +1022,29 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
*val = 0;
*val2 = data->emissivity * 1000;
}
- return IIO_VAL_INT_PLUS_MICRO;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ case IIO_CHAN_INFO_CALIBAMBIENT:
+ *val = data->object_ambient_temperature;
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = mlx90632_get_refresh_rate(data, &cr);
+ if (ret < 0)
+ goto mlx90632_read_raw_pm;
+ *val = mlx90632_freqs[cr][0];
+ *val2 = mlx90632_freqs[cr][1];
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+
+mlx90632_read_raw_pm:
+ pm_runtime_put_autosuspend(&data->client->dev);
+ return ret;
}
static int mlx90632_write_raw(struct iio_dev *indio_dev,
@@ -568,6 +1061,25 @@ static int mlx90632_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
data->emissivity = val * 1000 + val2 / 1000;
return 0;
+ case IIO_CHAN_INFO_CALIBAMBIENT:
+ data->object_ambient_temperature = val;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mlx90632_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *vals = (int *)mlx90632_freqs;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ *length = 2 * ARRAY_SIZE(mlx90632_freqs);
+ return IIO_AVAIL_LIST;
default:
return -EINVAL;
}
@@ -579,26 +1091,38 @@ static const struct iio_chan_spec mlx90632_channels[] = {
.modified = 1,
.channel2 = IIO_MOD_TEMP_AMBIENT,
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
},
{
.type = IIO_TEMP,
.modified = 1,
.channel2 = IIO_MOD_TEMP_OBJECT,
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
- BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
+ BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
},
};
static const struct iio_info mlx90632_info = {
.read_raw = mlx90632_read_raw,
.write_raw = mlx90632_write_raw,
+ .read_avail = mlx90632_read_avail,
};
-static int mlx90632_sleep(struct mlx90632_data *data)
+static void mlx90632_sleep(void *_data)
+{
+ struct mlx90632_data *data = _data;
+
+ mlx90632_pwr_set_sleep_step(data->regmap);
+}
+
+static int mlx90632_suspend(struct mlx90632_data *data)
{
regcache_mark_dirty(data->regmap);
- dev_dbg(&data->client->dev, "Requesting sleep");
+ dev_dbg(&data->client->dev, "Requesting suspend");
return mlx90632_pwr_set_sleep_step(data->regmap);
}
@@ -617,20 +1141,44 @@ static int mlx90632_wakeup(struct mlx90632_data *data)
return mlx90632_pwr_continuous(data->regmap);
}
-static int mlx90632_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static void mlx90632_disable_regulator(void *_data)
{
- struct iio_dev *indio_dev;
+ struct mlx90632_data *data = _data;
+ int ret;
+
+ ret = regulator_disable(data->regulator);
+ if (ret < 0)
+ dev_err(regmap_get_device(data->regmap),
+ "Failed to disable power regulator: %d\n", ret);
+}
+
+static int mlx90632_enable_regulator(struct mlx90632_data *data)
+{
+ int ret;
+
+ ret = regulator_enable(data->regulator);
+ if (ret < 0) {
+ dev_err(regmap_get_device(data->regmap), "Failed to enable power regulator!\n");
+ return ret;
+ }
+
+ mlx90632_reset_delay();
+
+ return ret;
+}
+
+static int mlx90632_probe(struct i2c_client *client)
+{
+ const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct mlx90632_data *mlx90632;
+ struct iio_dev *indio_dev;
struct regmap *regmap;
- int ret;
unsigned int read;
+ int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
- if (!indio_dev) {
- dev_err(&client->dev, "Failed to allocate device\n");
+ if (!indio_dev)
return -ENOMEM;
- }
regmap = devm_regmap_init_i2c(client, &mlx90632_regmap);
if (IS_ERR(regmap)) {
@@ -643,35 +1191,65 @@ static int mlx90632_probe(struct i2c_client *client,
i2c_set_clientdata(client, indio_dev);
mlx90632->client = client;
mlx90632->regmap = regmap;
+ mlx90632->mtyp = MLX90632_MTYP_MEDICAL;
+ mlx90632->powerstatus = MLX90632_PWR_STATUS_HALT;
mutex_init(&mlx90632->lock);
- indio_dev->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);
+ mlx90632->regulator = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(mlx90632->regulator))
+ return dev_err_probe(&client->dev, PTR_ERR(mlx90632->regulator),
+ "failed to get vdd regulator");
+
+ ret = mlx90632_enable_regulator(mlx90632);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_add_action_or_reset(&client->dev, mlx90632_disable_regulator,
+ mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup regulator cleanup action %d\n",
+ ret);
+ return ret;
+ }
+
ret = mlx90632_wakeup(mlx90632);
if (ret < 0) {
dev_err(&client->dev, "Wakeup failed: %d\n", ret);
return ret;
}
+ ret = devm_add_action_or_reset(&client->dev, mlx90632_sleep, mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup low power cleanup action %d\n",
+ ret);
+ return ret;
+ }
+
ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read);
if (ret < 0) {
dev_err(&client->dev, "read of version failed: %d\n", ret);
return ret;
}
+ read = read & MLX90632_ID_MASK;
if (read == MLX90632_ID_MEDICAL) {
dev_dbg(&client->dev,
"Detected Medical EEPROM calibration %x\n", read);
} else if (read == MLX90632_ID_CONSUMER) {
dev_dbg(&client->dev,
"Detected Consumer EEPROM calibration %x\n", read);
+ } else if (read == MLX90632_ID_EXTENDED) {
+ dev_dbg(&client->dev,
+ "Detected Extended range EEPROM calibration %x\n", read);
+ mlx90632->mtyp = MLX90632_MTYP_EXTENDED;
} else if ((read & MLX90632_DSP_MASK) == MLX90632_DSP_VERSION) {
dev_dbg(&client->dev,
- "Detected Unknown EEPROM calibration %x\n", read);
+ "Detected Unknown EEPROM calibration %x\n", read);
} else {
dev_err(&client->dev,
"Wrong DSP version %x (expected %x)\n",
@@ -680,38 +1258,25 @@ static int mlx90632_probe(struct i2c_client *client,
}
mlx90632->emissivity = 1000;
+ mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
+ mlx90632->interaction_ts = jiffies; /* Set initial value */
- pm_runtime_disable(&client->dev);
- ret = pm_runtime_set_active(&client->dev);
- if (ret < 0) {
- mlx90632_sleep(mlx90632);
+ pm_runtime_get_noresume(&client->dev);
+ pm_runtime_set_active(&client->dev);
+
+ ret = devm_pm_runtime_enable(&client->dev);
+ if (ret)
return ret;
- }
- pm_runtime_enable(&client->dev);
+
pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_put_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;
+ return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct i2c_device_id mlx90632_id[] = {
- { "mlx90632", 0 },
+ { "mlx90632" },
{ }
};
MODULE_DEVICE_TABLE(i2c, mlx90632_id);
@@ -722,33 +1287,54 @@ static const struct of_device_id mlx90632_of_match[] = {
};
MODULE_DEVICE_TABLE(of, mlx90632_of_match);
-static int __maybe_unused mlx90632_pm_suspend(struct device *dev)
+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);
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
- return mlx90632_sleep(data);
+ ret = mlx90632_suspend(data);
+ if (ret < 0)
+ return ret;
+
+ ret = regulator_disable(data->regulator);
+ if (ret < 0)
+ dev_err(regmap_get_device(data->regmap),
+ "Failed to disable power regulator: %d\n", ret);
+
+ return ret;
}
-static int __maybe_unused mlx90632_pm_resume(struct device *dev)
+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);
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
+
+ ret = mlx90632_enable_regulator(data);
+ if (ret < 0)
+ return ret;
return mlx90632_wakeup(data);
}
-static UNIVERSAL_DEV_PM_OPS(mlx90632_pm_ops, mlx90632_pm_suspend,
- mlx90632_pm_resume, NULL);
+static int mlx90632_pm_runtime_suspend(struct device *dev)
+{
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+
+ return mlx90632_pwr_set_sleep_step(data->regmap);
+}
+
+static const struct dev_pm_ops mlx90632_pm_ops = {
+ SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
+ RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, NULL, NULL)
+};
static struct i2c_driver mlx90632_driver = {
.driver = {
.name = "mlx90632",
.of_match_table = mlx90632_of_match,
- .pm = &mlx90632_pm_ops,
+ .pm = pm_ptr(&mlx90632_pm_ops),
},
.probe = mlx90632_probe,
- .remove = mlx90632_remove,
.id_table = mlx90632_id,
};
module_i2c_driver(mlx90632_driver);
generated by cgit (git 2.34.1) at 2025-12-26 20:04:29 +0000