1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Code shared between the different Qualcomm PMIC voltage ADCs 4 */ 5 6 #ifndef QCOM_VADC_COMMON_H 7 #define QCOM_VADC_COMMON_H 8 9 #define VADC_CONV_TIME_MIN_US 2000 10 #define VADC_CONV_TIME_MAX_US 2100 11 12 /* Min ADC code represents 0V */ 13 #define VADC_MIN_ADC_CODE 0x6000 14 /* Max ADC code represents full-scale range of 1.8V */ 15 #define VADC_MAX_ADC_CODE 0xa800 16 17 #define VADC_ABSOLUTE_RANGE_UV 625000 18 #define VADC_RATIOMETRIC_RANGE 1800 19 20 #define VADC_DEF_PRESCALING 0 /* 1:1 */ 21 #define VADC_DEF_DECIMATION 0 /* 512 */ 22 #define VADC_DEF_HW_SETTLE_TIME 0 /* 0 us */ 23 #define VADC_DEF_AVG_SAMPLES 0 /* 1 sample */ 24 #define VADC_DEF_CALIB_TYPE VADC_CALIB_ABSOLUTE 25 26 #define VADC_DECIMATION_MIN 512 27 #define VADC_DECIMATION_MAX 4096 28 #define ADC5_DEF_VBAT_PRESCALING 1 /* 1:3 */ 29 #define ADC5_DECIMATION_SHORT 250 30 #define ADC5_DECIMATION_MEDIUM 420 31 #define ADC5_DECIMATION_LONG 840 32 /* Default decimation - 1024 for rev2, 840 for pmic5 */ 33 #define ADC5_DECIMATION_DEFAULT 2 34 #define ADC5_DECIMATION_SAMPLES_MAX 3 35 36 #define VADC_HW_SETTLE_DELAY_MAX 10000 37 #define VADC_HW_SETTLE_SAMPLES_MAX 16 38 #define VADC_AVG_SAMPLES_MAX 512 39 #define ADC5_AVG_SAMPLES_MAX 16 40 41 #define PMIC5_CHG_TEMP_SCALE_FACTOR 377500 42 #define PMIC5_SMB_TEMP_CONSTANT 419400 43 #define PMIC5_SMB_TEMP_SCALE_FACTOR 356 44 45 #define PMI_CHG_SCALE_1 -138890 46 #define PMI_CHG_SCALE_2 391750000000LL 47 48 #define VADC5_MAX_CODE 0x7fff 49 #define ADC5_FULL_SCALE_CODE 0x70e4 50 #define ADC5_USR_DATA_CHECK 0x8000 51 52 #define R_PU_100K 100000 53 #define RATIO_MAX_ADC7 BIT(14) 54 55 #define DIE_TEMP_ADC7_SCALE_1 -60000 56 #define DIE_TEMP_ADC7_SCALE_2 20000 57 #define DIE_TEMP_ADC7_SCALE_FACTOR 1000 58 #define DIE_TEMP_ADC7_MAX 160000 59 60 /** 61 * struct vadc_map_pt - Map the graph representation for ADC channel 62 * @x: Represent the ADC digitized code. 63 * @y: Represent the physical data which can be temperature, voltage, 64 * resistance. 65 */ 66 struct vadc_map_pt { 67 s32 x; 68 s32 y; 69 }; 70 71 /* 72 * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels. 73 * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for 74 * calibration. 75 */ 76 enum vadc_calibration { 77 VADC_CALIB_ABSOLUTE = 0, 78 VADC_CALIB_RATIOMETRIC 79 }; 80 81 /** 82 * struct vadc_linear_graph - Represent ADC characteristics. 83 * @dy: numerator slope to calculate the gain. 84 * @dx: denominator slope to calculate the gain. 85 * @gnd: A/D word of the ground reference used for the channel. 86 * 87 * Each ADC device has different offset and gain parameters which are 88 * computed to calibrate the device. 89 */ 90 struct vadc_linear_graph { 91 s32 dy; 92 s32 dx; 93 s32 gnd; 94 }; 95 96 /** 97 * struct vadc_prescale_ratio - Represent scaling ratio for ADC input. 98 * @num: the inverse numerator of the gain applied to the input channel. 99 * @den: the inverse denominator of the gain applied to the input channel. 100 */ 101 struct vadc_prescale_ratio { 102 u32 num; 103 u32 den; 104 }; 105 106 /** 107 * enum vadc_scale_fn_type - Scaling function to convert ADC code to 108 * physical scaled units for the channel. 109 * SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV). 110 * SCALE_THERM_100K_PULLUP: Returns temperature in millidegC. 111 * Uses a mapping table with 100K pullup. 112 * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade. 113 * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC. 114 * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp 115 * SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to 116 * voltage (uV) with hardware applied offset/slope values to adc code. 117 * SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using 118 * lookup table. The hardware applies offset/slope to adc code. 119 * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using 120 * 100k pullup. The hardware applies offset/slope to adc code. 121 * SCALE_HW_CALIB_THERM_100K_PU_PM7: Returns temperature in millidegC using 122 * lookup table for PMIC7. The hardware applies offset/slope to adc code. 123 * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade. 124 * The hardware applies offset/slope to adc code. 125 * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade. 126 * The hardware applies offset/slope to adc code. This is for PMIC7. 127 * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5 128 * charger temperature. 129 * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5 130 * SMB1390 temperature. 131 */ 132 enum vadc_scale_fn_type { 133 SCALE_DEFAULT = 0, 134 SCALE_THERM_100K_PULLUP, 135 SCALE_PMIC_THERM, 136 SCALE_XOTHERM, 137 SCALE_PMI_CHG_TEMP, 138 SCALE_HW_CALIB_DEFAULT, 139 SCALE_HW_CALIB_THERM_100K_PULLUP, 140 SCALE_HW_CALIB_XOTHERM, 141 SCALE_HW_CALIB_THERM_100K_PU_PM7, 142 SCALE_HW_CALIB_PMIC_THERM, 143 SCALE_HW_CALIB_PMIC_THERM_PM7, 144 SCALE_HW_CALIB_PM5_CHG_TEMP, 145 SCALE_HW_CALIB_PM5_SMB_TEMP, 146 SCALE_HW_CALIB_INVALID, 147 }; 148 149 struct adc5_data { 150 const u32 full_scale_code_volt; 151 const u32 full_scale_code_cur; 152 const struct adc5_channels *adc_chans; 153 const struct iio_info *info; 154 unsigned int *decimation; 155 unsigned int *hw_settle_1; 156 unsigned int *hw_settle_2; 157 }; 158 159 int qcom_vadc_scale(enum vadc_scale_fn_type scaletype, 160 const struct vadc_linear_graph *calib_graph, 161 const struct vadc_prescale_ratio *prescale, 162 bool absolute, 163 u16 adc_code, int *result_mdec); 164 165 struct qcom_adc5_scale_type { 166 int (*scale_fn)(const struct vadc_prescale_ratio *prescale, 167 const struct adc5_data *data, u16 adc_code, int *result); 168 }; 169 170 int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype, 171 const struct vadc_prescale_ratio *prescale, 172 const struct adc5_data *data, 173 u16 adc_code, int *result_mdec); 174 175 int qcom_vadc_decimation_from_dt(u32 value); 176 177 #endif /* QCOM_VADC_COMMON_H */ 178