1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/fixp-arith.h>
6 #include <linux/iio/adc/qcom-vadc-common.h>
14  * struct vadc_map_pt - Map the graph representation for ADC channel
17  *     resistance.
26 	{1758,	-40000 },
27 	{1742,	-35000 },
28 	{1719,	-30000 },
29 	{1691,	-25000 },
30 	{1654,	-20000 },
31 	{1608,	-15000 },
32 	{1551,	-10000 },
33 	{1483,	-5000 },
63  * Voltage to temperature table for 100k pull up for NTCG104EF104 with
67 	{ 1831,	-40000 },
68 	{ 1814,	-35000 },
69 	{ 1791,	-30000 },
70 	{ 1761,	-25000 },
71 	{ 1723,	-20000 },
72 	{ 1675,	-15000 },
73 	{ 1616,	-10000 },
74 	{ 1545,	-5000 },
113 	{ 512400, -20000 },
114 	{ 473100, -40000 },
115 	{ 433700, -60000 },
119  * Resistance to temperature table for 100k pull up for NTCG104EF104.
122 	{ 4250657, -40960 },
123 	{ 3962085, -39936 },
124 	{ 3694875, -38912 },
125 	{ 3447322, -37888 },
126 	{ 3217867, -36864 },
127 	{ 3005082, -35840 },
128 	{ 2807660, -34816 },
129 	{ 2624405, -33792 },
130 	{ 2454218, -32768 },
131 	{ 2296094, -31744 },
132 	{ 2149108, -30720 },
133 	{ 2012414, -29696 },
134 	{ 1885232, -28672 },
135 	{ 1766846, -27648 },
136 	{ 1656598, -26624 },
137 	{ 1553884, -25600 },
138 	{ 1458147, -24576 },
139 	{ 1368873, -23552 },
140 	{ 1285590, -22528 },
141 	{ 1207863, -21504 },
142 	{ 1135290, -20480 },
143 	{ 1067501, -19456 },
144 	{ 1004155, -18432 },
145 	{ 944935, -17408 },
146 	{ 889550, -16384 },
147 	{ 837731, -15360 },
148 	{ 789229, -14336 },
149 	{ 743813, -13312 },
150 	{ 701271, -12288 },
151 	{ 661405, -11264 },
152 	{ 624032, -10240 },
153 	{ 588982, -9216 },
154 	{ 556100, -8192 },
155 	{ 525239, -7168 },
156 	{ 496264, -6144 },
157 	{ 469050, -5120 },
158 	{ 443480, -4096 },
159 	{ 419448, -3072 },
160 	{ 396851, -2048 },
161 	{ 375597, -1024 },
352 		return -EINVAL;  in qcom_vadc_map_voltage_temp()
360 		*output = pts[tablesize - 1].y;  in qcom_vadc_map_voltage_temp()
363 		*output = fixp_linear_interpolate(pts[i - 1].x, pts[i - 1].y,  in qcom_vadc_map_voltage_temp()
377 	 * Table must be sorted, find the interval of 'y' which contains value  in qcom_vadc_map_temp_voltage()
386 		return pts[tablesize - 1].x;  in qcom_vadc_map_temp_voltage()
389 	return fixp_linear_interpolate(pts[i - 1].y, pts[i - 1].x,  in qcom_vadc_map_temp_voltage()
398 	*scale_voltage = (adc_code - calib_graph->gnd);  in qcom_vadc_scale_calib()
399 	*scale_voltage *= calib_graph->dx;  in qcom_vadc_scale_calib()
400 	*scale_voltage = div64_s64(*scale_voltage, calib_graph->dy);  in qcom_vadc_scale_calib()
402 		*scale_voltage += calib_graph->dx;  in qcom_vadc_scale_calib()
417 	voltage *= prescale->denominator;  in qcom_vadc_scale_volt()
418 	result = div64_s64(voltage, prescale->numerator);  in qcom_vadc_scale_volt()
452 	u64 temp; /* Temporary variable for do_div */  in qcom_vadc_scale_die_temp()  local
457 		temp = voltage * prescale->denominator;  in qcom_vadc_scale_die_temp()
458 		do_div(temp, prescale->numerator * 2);  in qcom_vadc_scale_die_temp()
459 		voltage = temp;  in qcom_vadc_scale_die_temp()
478 	voltage *= prescale->denominator;  in qcom_vadc_scale_chg_temp()
479 	voltage = div64_s64(voltage, prescale->numerator);  in qcom_vadc_scale_chg_temp()
497 	volt *= prescale->numerator * factor * full_scale_code_volt;  in qcom_vadc_scale_voltage_code()
498 	volt = div64_s64(volt, (s64)prescale->denominator * adc_vdd_ref_mv * 1000);  in qcom_vadc_scale_voltage_code()
508 	s64 voltage, temp, adc_vdd_ref_mv = 1875;  in qcom_vadc_scale_code_voltage_factor()  local
521 	voltage = div64_s64(voltage, data->full_scale_code_volt);  in qcom_vadc_scale_code_voltage_factor()
523 		voltage *= prescale->denominator;  in qcom_vadc_scale_code_voltage_factor()
524 		temp = prescale->numerator * factor;  in qcom_vadc_scale_code_voltage_factor()
525 		voltage = div64_s64(voltage, temp);  in qcom_vadc_scale_code_voltage_factor()
538 	s64 resistance = adc_code;  in qcom_vadc7_scale_hw_calib_therm()  local
542 		return -EINVAL;  in qcom_vadc7_scale_hw_calib_therm()
544 	/* (ADC code * R_PULLUP (100Kohm)) / (full_scale_code - ADC code)*/  in qcom_vadc7_scale_hw_calib_therm()
545 	resistance *= R_PU_100K;  in qcom_vadc7_scale_hw_calib_therm()
546 	resistance = div64_s64(resistance, RATIO_MAX_ADC7 - adc_code);  in qcom_vadc7_scale_hw_calib_therm()
550 				 resistance, &result);  in qcom_vadc7_scale_hw_calib_therm()
580 	/* Map voltage to temperature from look-up table */  in qcom_vadc_scale_hw_calib_therm()
620 	*result_mdec = PMIC5_SMB_TEMP_CONSTANT - *result_mdec;  in qcom_vadc_scale_hw_smb_temp()
632 	*result_mdec = PMIC5_CHG_TEMP_SCALE_FACTOR - *result_mdec;  in qcom_vadc_scale_hw_chg5_temp()
662 		return -EINVAL;  in qcom_vadc_scale()
668 				 u32 full_scale_code_volt, int temp)  in qcom_adc_tm5_temp_volt_scale()  argument
675 					     temp);  in qcom_adc_tm5_temp_volt_scale()
680 u16 qcom_adc_tm5_gen2_temp_res_scale(int temp)  in qcom_adc_tm5_gen2_temp_res_scale()  argument
682 	int64_t resistance;  in qcom_adc_tm5_gen2_temp_res_scale()  local
684 	resistance = qcom_vadc_map_temp_voltage(adcmap7_100k,  in qcom_adc_tm5_gen2_temp_res_scale()
685 		ARRAY_SIZE(adcmap7_100k), temp);  in qcom_adc_tm5_gen2_temp_res_scale()
687 	return div64_s64(resistance * RATIO_MAX_ADC7, resistance + R_PU_100K);  in qcom_adc_tm5_gen2_temp_res_scale()
701 		return -EINVAL;  in qcom_adc5_hw_scale()
719 		return -EINVAL;  in qcom_adc5_prescaling_from_dt()
735 	return -EINVAL;  in qcom_adc5_hw_settle_time_from_dt()
742 		return -EINVAL;  in qcom_adc5_avg_samples_from_dt()
757 	return -EINVAL;  in qcom_adc5_decimation_from_dt()
765 		return -EINVAL;  in qcom_vadc_decimation_from_dt()