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 #include <linux/types.h> 10 11 #define VADC_CONV_TIME_MIN_US 2000 12 #define VADC_CONV_TIME_MAX_US 2100 13 14 /* Min ADC code represents 0V */ 15 #define VADC_MIN_ADC_CODE 0x6000 16 /* Max ADC code represents full-scale range of 1.8V */ 17 #define VADC_MAX_ADC_CODE 0xa800 18 19 #define VADC_ABSOLUTE_RANGE_UV 625000 20 #define VADC_RATIOMETRIC_RANGE 1800 21 22 #define VADC_DEF_PRESCALING 0 /* 1:1 */ 23 #define VADC_DEF_DECIMATION 0 /* 512 */ 24 #define VADC_DEF_HW_SETTLE_TIME 0 /* 0 us */ 25 #define VADC_DEF_AVG_SAMPLES 0 /* 1 sample */ 26 #define VADC_DEF_CALIB_TYPE VADC_CALIB_ABSOLUTE 27 28 #define VADC_DECIMATION_MIN 512 29 #define VADC_DECIMATION_MAX 4096 30 #define ADC5_DEF_VBAT_PRESCALING 1 /* 1:3 */ 31 #define ADC5_DECIMATION_SHORT 250 32 #define ADC5_DECIMATION_MEDIUM 420 33 #define ADC5_DECIMATION_LONG 840 34 /* Default decimation - 1024 for rev2, 840 for pmic5 */ 35 #define ADC5_DECIMATION_DEFAULT 2 36 #define ADC5_DECIMATION_SAMPLES_MAX 3 37 38 #define VADC_HW_SETTLE_DELAY_MAX 10000 39 #define VADC_HW_SETTLE_SAMPLES_MAX 16 40 #define VADC_AVG_SAMPLES_MAX 512 41 #define ADC5_AVG_SAMPLES_MAX 16 42 43 #define PMIC5_CHG_TEMP_SCALE_FACTOR 377500 44 #define PMIC5_SMB_TEMP_CONSTANT 419400 45 #define PMIC5_SMB_TEMP_SCALE_FACTOR 356 46 47 #define PMI_CHG_SCALE_1 -138890 48 #define PMI_CHG_SCALE_2 391750000000LL 49 50 #define VADC5_MAX_CODE 0x7fff 51 #define ADC5_FULL_SCALE_CODE 0x70e4 52 #define ADC5_USR_DATA_CHECK 0x8000 53 54 #define R_PU_100K 100000 55 #define RATIO_MAX_ADC7 BIT(14) 56 57 /* 58 * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels. 59 * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for 60 * calibration. 61 */ 62 enum vadc_calibration { 63 VADC_CALIB_ABSOLUTE = 0, 64 VADC_CALIB_RATIOMETRIC 65 }; 66 67 /** 68 * struct vadc_linear_graph - Represent ADC characteristics. 69 * @dy: numerator slope to calculate the gain. 70 * @dx: denominator slope to calculate the gain. 71 * @gnd: A/D word of the ground reference used for the channel. 72 * 73 * Each ADC device has different offset and gain parameters which are 74 * computed to calibrate the device. 75 */ 76 struct vadc_linear_graph { 77 s32 dy; 78 s32 dx; 79 s32 gnd; 80 }; 81 82 /** 83 * struct vadc_prescale_ratio - Represent scaling ratio for ADC input. 84 * @num: the inverse numerator of the gain applied to the input channel. 85 * @den: the inverse denominator of the gain applied to the input channel. 86 */ 87 struct vadc_prescale_ratio { 88 u32 num; 89 u32 den; 90 }; 91 92 /** 93 * enum vadc_scale_fn_type - Scaling function to convert ADC code to 94 * physical scaled units for the channel. 95 * SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV). 96 * SCALE_THERM_100K_PULLUP: Returns temperature in millidegC. 97 * Uses a mapping table with 100K pullup. 98 * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade. 99 * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC. 100 * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp 101 * SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to 102 * voltage (uV) with hardware applied offset/slope values to adc code. 103 * SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using 104 * lookup table. The hardware applies offset/slope to adc code. 105 * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using 106 * 100k pullup. The hardware applies offset/slope to adc code. 107 * SCALE_HW_CALIB_THERM_100K_PU_PM7: Returns temperature in millidegC using 108 * lookup table for PMIC7. The hardware applies offset/slope to adc code. 109 * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade. 110 * The hardware applies offset/slope to adc code. 111 * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade. 112 * The hardware applies offset/slope to adc code. This is for PMIC7. 113 * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5 114 * charger temperature. 115 * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5 116 * SMB1390 temperature. 117 */ 118 enum vadc_scale_fn_type { 119 SCALE_DEFAULT = 0, 120 SCALE_THERM_100K_PULLUP, 121 SCALE_PMIC_THERM, 122 SCALE_XOTHERM, 123 SCALE_PMI_CHG_TEMP, 124 SCALE_HW_CALIB_DEFAULT, 125 SCALE_HW_CALIB_THERM_100K_PULLUP, 126 SCALE_HW_CALIB_XOTHERM, 127 SCALE_HW_CALIB_THERM_100K_PU_PM7, 128 SCALE_HW_CALIB_PMIC_THERM, 129 SCALE_HW_CALIB_PMIC_THERM_PM7, 130 SCALE_HW_CALIB_PM5_CHG_TEMP, 131 SCALE_HW_CALIB_PM5_SMB_TEMP, 132 SCALE_HW_CALIB_INVALID, 133 }; 134 135 struct adc5_data { 136 const u32 full_scale_code_volt; 137 const u32 full_scale_code_cur; 138 const struct adc5_channels *adc_chans; 139 const struct iio_info *info; 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 unsigned int prescale_ratio, 158 const struct adc5_data *data, 159 u16 adc_code, int *result_mdec); 160 161 u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio, 162 u32 full_scale_code_volt, int temp); 163 164 int qcom_adc5_prescaling_from_dt(u32 num, u32 den); 165 166 int qcom_adc5_hw_settle_time_from_dt(u32 value, const unsigned int *hw_settle); 167 168 int qcom_adc5_avg_samples_from_dt(u32 value); 169 170 int qcom_adc5_decimation_from_dt(u32 value, const unsigned int *decimation); 171 172 int qcom_vadc_decimation_from_dt(u32 value); 173 174 #endif /* QCOM_VADC_COMMON_H */ 175
