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 KELVINMIL_CELSIUSMIL 273150 42 #define PMIC5_CHG_TEMP_SCALE_FACTOR 377500 43 #define PMIC5_SMB_TEMP_CONSTANT 419400 44 #define PMIC5_SMB_TEMP_SCALE_FACTOR 356 45 46 #define PMI_CHG_SCALE_1 -138890 47 #define PMI_CHG_SCALE_2 391750000000LL 48 49 #define VADC5_MAX_CODE 0x7fff 50 #define ADC5_FULL_SCALE_CODE 0x70e4 51 #define ADC5_USR_DATA_CHECK 0x8000 52 53 /** 54 * struct vadc_map_pt - Map the graph representation for ADC channel 55 * @x: Represent the ADC digitized code. 56 * @y: Represent the physical data which can be temperature, voltage, 57 * resistance. 58 */ 59 struct vadc_map_pt { 60 s32 x; 61 s32 y; 62 }; 63 64 /* 65 * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels. 66 * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for 67 * calibration. 68 */ 69 enum vadc_calibration { 70 VADC_CALIB_ABSOLUTE = 0, 71 VADC_CALIB_RATIOMETRIC 72 }; 73 74 /** 75 * struct vadc_linear_graph - Represent ADC characteristics. 76 * @dy: numerator slope to calculate the gain. 77 * @dx: denominator slope to calculate the gain. 78 * @gnd: A/D word of the ground reference used for the channel. 79 * 80 * Each ADC device has different offset and gain parameters which are 81 * computed to calibrate the device. 82 */ 83 struct vadc_linear_graph { 84 s32 dy; 85 s32 dx; 86 s32 gnd; 87 }; 88 89 /** 90 * struct vadc_prescale_ratio - Represent scaling ratio for ADC input. 91 * @num: the inverse numerator of the gain applied to the input channel. 92 * @den: the inverse denominator of the gain applied to the input channel. 93 */ 94 struct vadc_prescale_ratio { 95 u32 num; 96 u32 den; 97 }; 98 99 /** 100 * enum vadc_scale_fn_type - Scaling function to convert ADC code to 101 * physical scaled units for the channel. 102 * SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV). 103 * SCALE_THERM_100K_PULLUP: Returns temperature in millidegC. 104 * Uses a mapping table with 100K pullup. 105 * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade. 106 * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC. 107 * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp 108 * SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to 109 * voltage (uV) with hardware applied offset/slope values to adc code. 110 * SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using 111 * lookup table. The hardware applies offset/slope to adc code. 112 * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using 113 * 100k pullup. The hardware applies offset/slope to adc code. 114 * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade. 115 * The hardware applies offset/slope to adc code. 116 * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5 117 * charger temperature. 118 * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5 119 * SMB1390 temperature. 120 */ 121 enum vadc_scale_fn_type { 122 SCALE_DEFAULT = 0, 123 SCALE_THERM_100K_PULLUP, 124 SCALE_PMIC_THERM, 125 SCALE_XOTHERM, 126 SCALE_PMI_CHG_TEMP, 127 SCALE_HW_CALIB_DEFAULT, 128 SCALE_HW_CALIB_THERM_100K_PULLUP, 129 SCALE_HW_CALIB_XOTHERM, 130 SCALE_HW_CALIB_PMIC_THERM, 131 SCALE_HW_CALIB_PM5_CHG_TEMP, 132 SCALE_HW_CALIB_PM5_SMB_TEMP, 133 SCALE_HW_CALIB_INVALID, 134 }; 135 136 struct adc5_data { 137 const u32 full_scale_code_volt; 138 const u32 full_scale_code_cur; 139 const struct adc5_channels *adc_chans; 140 unsigned int *decimation; 141 unsigned int *hw_settle_1; 142 unsigned int *hw_settle_2; 143 }; 144 145 int qcom_vadc_scale(enum vadc_scale_fn_type scaletype, 146 const struct vadc_linear_graph *calib_graph, 147 const struct vadc_prescale_ratio *prescale, 148 bool absolute, 149 u16 adc_code, int *result_mdec); 150 151 struct qcom_adc5_scale_type { 152 int (*scale_fn)(const struct vadc_prescale_ratio *prescale, 153 const struct adc5_data *data, u16 adc_code, int *result); 154 }; 155 156 int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype, 157 const struct vadc_prescale_ratio *prescale, 158 const struct adc5_data *data, 159 u16 adc_code, int *result_mdec); 160 161 int qcom_vadc_decimation_from_dt(u32 value); 162 163 #endif /* QCOM_VADC_COMMON_H */ 164
