forked from ~ljy/RK356X_SDK_RELEASE
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hc
2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/iio/temperature/mlx90632.c
....@@ -10,7 +10,9 @@
1010 #include <linux/err.h>
1111 #include <linux/gpio/consumer.h>
1212 #include <linux/i2c.h>
13
+#include <linux/iopoll.h>
1314 #include <linux/kernel.h>
15
+#include <linux/limits.h>
1416 #include <linux/module.h>
1517 #include <linux/math64.h>
1618 #include <linux/of.h>
....@@ -58,12 +60,26 @@
5860 /* Control register address - volatile */
5961 #define MLX90632_REG_CONTROL	0x3001 /* Control Register address */
6062 #define   MLX90632_CFG_PWR_MASK		GENMASK(2, 1) /* PowerMode Mask */
63
+#define   MLX90632_CFG_MTYP_MASK		GENMASK(8, 4) /* Meas select Mask */
64
+
6165 /* PowerModes statuses */
6266 #define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
6367 #define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
6468 #define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
6569 #define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
6670 #define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
71
+
72
+/* Measurement types */
73
+#define MLX90632_MTYP_MEDICAL 0
74
+#define MLX90632_MTYP_EXTENDED 17
75
+
76
+/* Measurement type select*/
77
+#define MLX90632_MTYP_STATUS(ctrl_val) (ctrl_val << 4)
78
+#define MLX90632_MTYP_STATUS_MEDICAL MLX90632_MTYP_STATUS(MLX90632_MTYP_MEDICAL)
79
+#define MLX90632_MTYP_STATUS_EXTENDED MLX90632_MTYP_STATUS(MLX90632_MTYP_EXTENDED)
80
+
81
+/* I2C command register - volatile */
82
+#define MLX90632_REG_I2C_CMD    0x3005 /* I2C command Register address */
6783 
6884 /* Device status register - volatile */
6985 #define MLX90632_REG_STATUS	0x3fff /* Device status register */
....@@ -78,26 +94,53 @@
7894 #define MLX90632_RAM_2(meas_num)	(MLX90632_ADDR_RAM + 3 * meas_num + 1)
7995 #define MLX90632_RAM_3(meas_num)	(MLX90632_ADDR_RAM + 3 * meas_num + 2)
8096 
97
+/* Name important RAM_MEAS channels */
98
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1 MLX90632_RAM_3(17)
99
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2 MLX90632_RAM_3(18)
100
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_1 MLX90632_RAM_1(17)
101
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_2 MLX90632_RAM_2(17)
102
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_3 MLX90632_RAM_1(18)
103
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_4 MLX90632_RAM_2(18)
104
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_5 MLX90632_RAM_1(19)
105
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_6 MLX90632_RAM_2(19)
106
+
81107 /* Magic constants */
82108 #define MLX90632_ID_MEDICAL	0x0105 /* EEPROM DSPv5 Medical device id */
83109 #define MLX90632_ID_CONSUMER	0x0205 /* EEPROM DSPv5 Consumer device id */
110
+#define MLX90632_ID_EXTENDED	0x0505 /* EEPROM DSPv5 Extended range device id */
111
+#define MLX90632_ID_MASK	GENMASK(14, 0) /* DSP version and device ID in EE_VERSION */
84112 #define MLX90632_DSP_VERSION	5 /* DSP version */
85113 #define MLX90632_DSP_MASK	GENMASK(7, 0) /* DSP version in EE_VERSION */
86114 #define MLX90632_RESET_CMD	0x0006 /* Reset sensor (address or global) */
87
-#define MLX90632_REF_12		12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */
88
-#define MLX90632_REF_3		12LL /**< ResCtrlRef value of Channel 3 */
89
-#define MLX90632_MAX_MEAS_NUM	31 /**< Maximum measurements in list */
90
-#define MLX90632_SLEEP_DELAY_MS 3000 /**< Autosleep delay */
115
+#define MLX90632_REF_12 	12LL /* ResCtrlRef value of Ch 1 or Ch 2 */
116
+#define MLX90632_REF_3		12LL /* ResCtrlRef value of Channel 3 */
117
+#define MLX90632_MAX_MEAS_NUM	31 /* Maximum measurements in list */
118
+#define MLX90632_SLEEP_DELAY_MS 3000 /* Autosleep delay */
119
+#define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
91120 
121
+/**
122
+ * struct mlx90632_data - private data for the MLX90632 device
123
+ * @client: I2C client of the device
124
+ * @lock: Internal mutex for multiple reads for single measurement
125
+ * @regmap: Regmap of the device
126
+ * @emissivity: Object emissivity from 0 to 1000 where 1000 = 1.
127
+ * @mtyp: Measurement type physical sensor configuration for extended range
128
+ *        calculations
129
+ * @object_ambient_temperature: Ambient temperature at object (might differ of
130
+ *                              the ambient temperature of sensor.
131
+ */
92132 struct mlx90632_data {
93133 	struct i2c_client *client;
94
-	struct mutex lock; /* Multiple reads for single measurement */
134
+	struct mutex lock;
95135 	struct regmap *regmap;
96136 	u16 emissivity;
137
+	u8 mtyp;
138
+	u32 object_ambient_temperature;
97139 };
98140 
99141 static const struct regmap_range mlx90632_volatile_reg_range[] = {
100142 	regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
143
+	regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
101144 	regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
102145 	regmap_reg_range(MLX90632_RAM_1(0),
103146 			 MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
....@@ -113,6 +156,7 @@
113156 	regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
114157 	regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
115158 	regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
159
+	regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
116160 	regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
117161 	regmap_reg_range(MLX90632_RAM_1(0),
118162 			 MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
....@@ -142,7 +186,8 @@
142186 	.rd_table = &mlx90632_readable_regs_tbl,
143187 	.wr_table = &mlx90632_writeable_regs_tbl,
144188 
145
-	.use_single_rw = true,
189
+	.use_single_read = true,
190
+	.use_single_write = true,
146191 	.reg_format_endian = REGMAP_ENDIAN_BIG,
147192 	.val_format_endian = REGMAP_ENDIAN_BIG,
148193 	.cache_type = REGCACHE_RBTREE,
....@@ -163,8 +208,8 @@
163208 }
164209 
165210 /**
166
- * mlx90632_perform_measurement - Trigger and retrieve current measurement cycle
167
- * @*data: pointer to mlx90632_data object containing regmap information
211
+ * mlx90632_perform_measurement() - Trigger and retrieve current measurement cycle
212
+ * @data: pointer to mlx90632_data object containing regmap information
168213  *
169214  * Perform a measurement and return latest measurement cycle position reported
170215  * by sensor. This is a blocking function for 500ms, as that is default sensor
....@@ -172,30 +217,50 @@
172217  */
173218 static int mlx90632_perform_measurement(struct mlx90632_data *data)
174219 {
175
-	int ret, tries = 100;
176220 	unsigned int reg_status;
221
+	int ret;
177222 
178223 	ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
179224 				 MLX90632_STAT_DATA_RDY, 0);
180225 	if (ret < 0)
181226 		return ret;
182227 
183
-	while (tries-- > 0) {
184
-		ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
185
-				  &reg_status);
186
-		if (ret < 0)
187
-			return ret;
188
-		if (reg_status & MLX90632_STAT_DATA_RDY)
189
-			break;
190
-		usleep_range(10000, 11000);
191
-	}
228
+	ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS, reg_status,
229
+				       !(reg_status & MLX90632_STAT_DATA_RDY), 10000,
230
+				       100 * 10000);
192231 
193
-	if (tries < 0) {
232
+	if (ret < 0) {
194233 		dev_err(&data->client->dev, "data not ready");
195234 		return -ETIMEDOUT;
196235 	}
197236 
198237 	return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
238
+}
239
+
240
+static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
241
+{
242
+	int ret;
243
+
244
+	if ((type != MLX90632_MTYP_MEDICAL) && (type != MLX90632_MTYP_EXTENDED))
245
+		return -EINVAL;
246
+
247
+	ret = regmap_write(regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
248
+	if (ret < 0)
249
+		return ret;
250
+
251
+	/*
252
+	 * Give the mlx90632 some time to reset properly before sending a new I2C command
253
+	 * if this is not done, the following I2C command(s) will not be accepted.
254
+	 */
255
+	usleep_range(150, 200);
256
+
257
+	ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
258
+				 (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
259
+				 (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
260
+	if (ret < 0)
261
+		return ret;
262
+
263
+	return mlx90632_pwr_continuous(regmap);
199264 }
200265 
201266 static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
....@@ -299,6 +364,97 @@
299364 	return ret;
300365 }
301366 
367
+static int mlx90632_read_ambient_raw_extended(struct regmap *regmap,
368
+					      s16 *ambient_new_raw, s16 *ambient_old_raw)
369
+{
370
+	unsigned int read_tmp;
371
+	int ret;
372
+
373
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1, &read_tmp);
374
+	if (ret < 0)
375
+		return ret;
376
+	*ambient_new_raw = (s16)read_tmp;
377
+
378
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2, &read_tmp);
379
+	if (ret < 0)
380
+		return ret;
381
+	*ambient_old_raw = (s16)read_tmp;
382
+
383
+	return 0;
384
+}
385
+
386
+static int mlx90632_read_object_raw_extended(struct regmap *regmap, s16 *object_new_raw)
387
+{
388
+	unsigned int read_tmp;
389
+	s32 read;
390
+	int ret;
391
+
392
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_1, &read_tmp);
393
+	if (ret < 0)
394
+		return ret;
395
+	read = (s16)read_tmp;
396
+
397
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_2, &read_tmp);
398
+	if (ret < 0)
399
+		return ret;
400
+	read = read - (s16)read_tmp;
401
+
402
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_3, &read_tmp);
403
+	if (ret < 0)
404
+		return ret;
405
+	read = read - (s16)read_tmp;
406
+
407
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_4, &read_tmp);
408
+	if (ret < 0)
409
+		return ret;
410
+	read = (read + (s16)read_tmp) / 2;
411
+
412
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_5, &read_tmp);
413
+	if (ret < 0)
414
+		return ret;
415
+	read = read + (s16)read_tmp;
416
+
417
+	ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_6, &read_tmp);
418
+	if (ret < 0)
419
+		return ret;
420
+	read = read + (s16)read_tmp;
421
+
422
+	if (read > S16_MAX || read < S16_MIN)
423
+		return -ERANGE;
424
+
425
+	*object_new_raw = read;
426
+
427
+	return 0;
428
+}
429
+
430
+static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *object_new_raw,
431
+					      s16 *ambient_new_raw, s16 *ambient_old_raw)
432
+{
433
+	s32 ret, meas;
434
+
435
+	mutex_lock(&data->lock);
436
+	ret = mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_EXTENDED);
437
+	if (ret < 0)
438
+		goto read_unlock;
439
+
440
+	ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
441
+				50000, 800000, false, data);
442
+	if (ret != 0)
443
+		goto read_unlock;
444
+
445
+	ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
446
+	if (ret < 0)
447
+		goto read_unlock;
448
+
449
+	ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_old_raw);
450
+
451
+read_unlock:
452
+	(void) mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_MEDICAL);
453
+
454
+	mutex_unlock(&data->lock);
455
+	return ret;
456
+}
457
+
302458 static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
303459 				     s32 *reg_value)
304460 {
....@@ -353,9 +509,23 @@
353509 	return div64_s64((tmp << 19ULL), 1000LL);
354510 }
355511 
512
+static s64 mlx90632_preprocess_temp_obj_extended(s16 object_new_raw, s16 ambient_new_raw,
513
+						 s16 ambient_old_raw, s16 Ka)
514
+{
515
+	s64 VR_IR, kKa, tmp;
516
+
517
+	kKa = ((s64)Ka * 1000LL) >> 10ULL;
518
+	VR_IR = (s64)ambient_old_raw * 1000000LL +
519
+		kKa * div64_s64((s64)ambient_new_raw * 1000LL,
520
+				MLX90632_REF_3);
521
+	tmp = div64_s64(
522
+			div64_s64((s64) object_new_raw * 1000000000000LL, MLX90632_REF_12),
523
+			VR_IR);
524
+	return div64_s64(tmp << 19ULL, 1000LL);
525
+}
526
+
356527 static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
357
-				      s32 P_T, s32 P_R, s32 P_G, s32 P_O,
358
-				      s16 Gb)
528
+				      s32 P_T, s32 P_R, s32 P_G, s32 P_O, s16 Gb)
359529 {
360530 	s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
361531 
....@@ -373,11 +543,11 @@
373543 }
374544 
375545 static s32 mlx90632_calc_temp_object_iteration(s32 prev_object_temp, s64 object,
376
-					       s64 TAdut, s32 Fa, s32 Fb,
546
+					       s64 TAdut, s64 TAdut4, s32 Fa, s32 Fb,
377547 					       s32 Ga, s16 Ha, s16 Hb,
378548 					       u16 emissivity)
379549 {
380
-	s64 calcedKsTO, calcedKsTA, ir_Alpha, TAdut4, Alpha_corr;
550
+	s64 calcedKsTO, calcedKsTA, ir_Alpha, Alpha_corr;
381551 	s64 Ha_customer, Hb_customer;
382552 
383553 	Ha_customer = ((s64)Ha * 1000000LL) >> 14ULL;
....@@ -392,33 +562,63 @@
392562 	Alpha_corr = emissivity * div64_s64(Alpha_corr, 100000LL);
393563 	Alpha_corr = div64_s64(Alpha_corr, 1000LL);
394564 	ir_Alpha = div64_s64((s64)object * 10000000LL, Alpha_corr);
395
-	TAdut4 = (div64_s64(TAdut, 10000LL) + 27315) *
396
-		(div64_s64(TAdut, 10000LL) + 27315) *
397
-		(div64_s64(TAdut, 10000LL)  + 27315) *
398
-		(div64_s64(TAdut, 10000LL) + 27315);
399565 
400566 	return (int_sqrt64(int_sqrt64(ir_Alpha * 1000000000000LL + TAdut4))
401567 		- 27315 - Hb_customer) * 10;
568
+}
569
+
570
+static s64 mlx90632_calc_ta4(s64 TAdut, s64 scale)
571
+{
572
+	return (div64_s64(TAdut, scale) + 27315) *
573
+		(div64_s64(TAdut, scale) + 27315) *
574
+		(div64_s64(TAdut, scale) + 27315) *
575
+		(div64_s64(TAdut, scale) + 27315);
402576 }
403577 
404578 static s32 mlx90632_calc_temp_object(s64 object, s64 ambient, s32 Ea, s32 Eb,
405579 				     s32 Fa, s32 Fb, s32 Ga, s16 Ha, s16 Hb,
406580 				     u16 tmp_emi)
407581 {
408
-	s64 kTA, kTA0, TAdut;
582
+	s64 kTA, kTA0, TAdut, TAdut4;
409583 	s64 temp = 25000;
410584 	s8 i;
411585 
412586 	kTA = (Ea * 1000LL) >> 16LL;
413587 	kTA0 = (Eb * 1000LL) >> 8LL;
414588 	TAdut = div64_s64(((ambient - kTA0) * 1000000LL), kTA) + 25 * 1000000LL;
589
+	TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
415590 
416591 	/* Iterations of calculation as described in datasheet */
417592 	for (i = 0; i < 5; ++i) {
418
-		temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut,
593
+		temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TAdut4,
419594 							   Fa, Fb, Ga, Ha, Hb,
420595 							   tmp_emi);
421596 	}
597
+	return temp;
598
+}
599
+
600
+static s32 mlx90632_calc_temp_object_extended(s64 object, s64 ambient, s64 reflected,
601
+					      s32 Ea, s32 Eb, s32 Fa, s32 Fb, s32 Ga,
602
+					      s16 Ha, s16 Hb, u16 tmp_emi)
603
+{
604
+	s64 kTA, kTA0, TAdut, TAdut4, Tr4, TaTr4;
605
+	s64 temp = 25000;
606
+	s8 i;
607
+
608
+	kTA = (Ea * 1000LL) >> 16LL;
609
+	kTA0 = (Eb * 1000LL) >> 8LL;
610
+	TAdut = div64_s64((ambient - kTA0) * 1000000LL, kTA) + 25 * 1000000LL;
611
+	Tr4 = mlx90632_calc_ta4(reflected, 10);
612
+	TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
613
+	TaTr4 = Tr4 - div64_s64(Tr4 - TAdut4, tmp_emi) * 1000;
614
+
615
+	/* Iterations of calculation as described in datasheet */
616
+	for (i = 0; i < 5; ++i) {
617
+		temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TaTr4,
618
+							   Fa / 2, Fb, Ga, Ha, Hb,
619
+							   tmp_emi);
620
+	}
621
+
422622 	return temp;
423623 }
424624 
....@@ -468,6 +668,26 @@
468668 					&object_new_raw, &object_old_raw);
469669 	if (ret < 0)
470670 		return ret;
671
+
672
+	if (object_new_raw > MLX90632_EXTENDED_LIMIT &&
673
+	    data->mtyp == MLX90632_MTYP_EXTENDED) {
674
+		ret = mlx90632_read_all_channel_extended(data, &object_new_raw,
675
+							 &ambient_new_raw, &ambient_old_raw);
676
+		if (ret < 0)
677
+			return ret;
678
+
679
+		/* Use extended mode calculations */
680
+		ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
681
+						       ambient_old_raw, Gb);
682
+		object = mlx90632_preprocess_temp_obj_extended(object_new_raw,
683
+							       ambient_new_raw,
684
+							       ambient_old_raw, Ka);
685
+		*val = mlx90632_calc_temp_object_extended(object, ambient,
686
+							  data->object_ambient_temperature,
687
+							  Ea, Eb, Fa, Fb, Ga,
688
+							  Ha, Hb, data->emissivity);
689
+		return 0;
690
+	}
471691 
472692 	ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
473693 					       ambient_old_raw, Gb);
....@@ -547,7 +767,9 @@
547767 			*val2 = data->emissivity * 1000;
548768 		}
549769 		return IIO_VAL_INT_PLUS_MICRO;
550
-
770
+	case IIO_CHAN_INFO_CALIBAMBIENT:
771
+		*val = data->object_ambient_temperature;
772
+		return IIO_VAL_INT;
551773 	default:
552774 		return -EINVAL;
553775 	}
....@@ -567,6 +789,9 @@
567789 			return -EINVAL;
568790 		data->emissivity = val * 1000 + val2 / 1000;
569791 		return 0;
792
+	case IIO_CHAN_INFO_CALIBAMBIENT:
793
+		data->object_ambient_temperature = val;
794
+		return 0;
570795 	default:
571796 		return -EINVAL;
572797 	}
....@@ -584,7 +809,7 @@
584809 		.modified = 1,
585810 		.channel2 = IIO_MOD_TEMP_OBJECT,
586811 		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
587
-			BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
812
+			BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
588813 	},
589814 };
590815 
....@@ -642,9 +867,9 @@
642867 	i2c_set_clientdata(client, indio_dev);
643868 	mlx90632->client = client;
644869 	mlx90632->regmap = regmap;
870
+	mlx90632->mtyp = MLX90632_MTYP_MEDICAL;
645871 
646872 	mutex_init(&mlx90632->lock);
647
-	indio_dev->dev.parent = &client->dev;
648873 	indio_dev->name = id->name;
649874 	indio_dev->modes = INDIO_DIRECT_MODE;
650875 	indio_dev->info = &mlx90632_info;
....@@ -662,12 +887,17 @@
662887 		dev_err(&client->dev, "read of version failed: %d\n", ret);
663888 		return ret;
664889 	}
890
+	read = read & MLX90632_ID_MASK;
665891 	if (read == MLX90632_ID_MEDICAL) {
666892 		dev_dbg(&client->dev,
667893 			"Detected Medical EEPROM calibration %x\n", read);
668894 	} else if (read == MLX90632_ID_CONSUMER) {
669895 		dev_dbg(&client->dev,
670896 			"Detected Consumer EEPROM calibration %x\n", read);
897
+	} else if (read == MLX90632_ID_EXTENDED) {
898
+		dev_dbg(&client->dev,
899
+			"Detected Extended range EEPROM calibration %x\n", read);
900
+		mlx90632->mtyp = MLX90632_MTYP_EXTENDED;
671901 	} else if ((read & MLX90632_DSP_MASK) == MLX90632_DSP_VERSION) {
672902 		dev_dbg(&client->dev,
673903 			"Detected Unknown EEPROM calibration %x\n", read);
....@@ -679,6 +909,7 @@
679909 	}
680910 
681911 	mlx90632->emissivity = 1000;
912
+	mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
682913 
683914 	pm_runtime_disable(&client->dev);
684915 	ret = pm_runtime_set_active(&client->dev);