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Diffstat (limited to 'drivers/iio/adc/qcom-vadc-common.c')
-rw-r--r--drivers/iio/adc/qcom-vadc-common.c700
1 files changed, 621 insertions, 79 deletions
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c
index 102fc51b10aa..b03cf584b165 100644
--- a/drivers/iio/adc/qcom-vadc-common.c
+++ b/drivers/iio/adc/qcom-vadc-common.c
@@ -1,95 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
+#include <linux/fixp-arith.h>
+#include <linux/iio/adc/qcom-vadc-common.h>
#include <linux/math64.h>
#include <linux/log2.h>
#include <linux/err.h>
-
-#include "qcom-vadc-common.h"
+#include <linux/module.h>
+#include <linux/units.h>
+
+/**
+ * struct vadc_map_pt - Map the graph representation for ADC channel
+ * @x: Represent the ADC digitized code.
+ * @y: Represent the physical data which can be temperature, voltage,
+ * resistance.
+ */
+struct vadc_map_pt {
+ s32 x;
+ s32 y;
+};
/* Voltage to temperature */
static const struct vadc_map_pt adcmap_100k_104ef_104fb[] = {
- {1758, -40},
- {1742, -35},
- {1719, -30},
- {1691, -25},
- {1654, -20},
- {1608, -15},
- {1551, -10},
- {1483, -5},
- {1404, 0},
- {1315, 5},
- {1218, 10},
- {1114, 15},
- {1007, 20},
- {900, 25},
- {795, 30},
- {696, 35},
- {605, 40},
- {522, 45},
- {448, 50},
- {383, 55},
- {327, 60},
- {278, 65},
- {237, 70},
- {202, 75},
- {172, 80},
- {146, 85},
- {125, 90},
- {107, 95},
- {92, 100},
- {79, 105},
- {68, 110},
- {59, 115},
- {51, 120},
- {44, 125}
+ {1758, -40000 },
+ {1742, -35000 },
+ {1719, -30000 },
+ {1691, -25000 },
+ {1654, -20000 },
+ {1608, -15000 },
+ {1551, -10000 },
+ {1483, -5000 },
+ {1404, 0 },
+ {1315, 5000 },
+ {1218, 10000 },
+ {1114, 15000 },
+ {1007, 20000 },
+ {900, 25000 },
+ {795, 30000 },
+ {696, 35000 },
+ {605, 40000 },
+ {522, 45000 },
+ {448, 50000 },
+ {383, 55000 },
+ {327, 60000 },
+ {278, 65000 },
+ {237, 70000 },
+ {202, 75000 },
+ {172, 80000 },
+ {146, 85000 },
+ {125, 90000 },
+ {107, 95000 },
+ {92, 100000 },
+ {79, 105000 },
+ {68, 110000 },
+ {59, 115000 },
+ {51, 120000 },
+ {44, 125000 }
+};
+
+/*
+ * Voltage to temperature table for 100k pull up for NTCG104EF104 with
+ * 1.875V reference.
+ */
+static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
+ { 1831, -40000 },
+ { 1814, -35000 },
+ { 1791, -30000 },
+ { 1761, -25000 },
+ { 1723, -20000 },
+ { 1675, -15000 },
+ { 1616, -10000 },
+ { 1545, -5000 },
+ { 1463, 0 },
+ { 1370, 5000 },
+ { 1268, 10000 },
+ { 1160, 15000 },
+ { 1049, 20000 },
+ { 937, 25000 },
+ { 828, 30000 },
+ { 726, 35000 },
+ { 630, 40000 },
+ { 544, 45000 },
+ { 467, 50000 },
+ { 399, 55000 },
+ { 340, 60000 },
+ { 290, 65000 },
+ { 247, 70000 },
+ { 209, 75000 },
+ { 179, 80000 },
+ { 153, 85000 },
+ { 130, 90000 },
+ { 112, 95000 },
+ { 96, 100000 },
+ { 82, 105000 },
+ { 71, 110000 },
+ { 62, 115000 },
+ { 53, 120000 },
+ { 46, 125000 },
+};
+
+static const struct vadc_map_pt adcmap7_die_temp[] = {
+ { 857300, 160000 },
+ { 820100, 140000 },
+ { 782500, 120000 },
+ { 744600, 100000 },
+ { 706400, 80000 },
+ { 667900, 60000 },
+ { 629300, 40000 },
+ { 590500, 20000 },
+ { 551500, 0 },
+ { 512400, -20000 },
+ { 473100, -40000 },
+ { 433700, -60000 },
+};
+
+/*
+ * Resistance to temperature table for 100k pull up for NTCG104EF104.
+ */
+static const struct vadc_map_pt adcmap7_100k[] = {
+ { 4250657, -40960 },
+ { 3962085, -39936 },
+ { 3694875, -38912 },
+ { 3447322, -37888 },
+ { 3217867, -36864 },
+ { 3005082, -35840 },
+ { 2807660, -34816 },
+ { 2624405, -33792 },
+ { 2454218, -32768 },
+ { 2296094, -31744 },
+ { 2149108, -30720 },
+ { 2012414, -29696 },
+ { 1885232, -28672 },
+ { 1766846, -27648 },
+ { 1656598, -26624 },
+ { 1553884, -25600 },
+ { 1458147, -24576 },
+ { 1368873, -23552 },
+ { 1285590, -22528 },
+ { 1207863, -21504 },
+ { 1135290, -20480 },
+ { 1067501, -19456 },
+ { 1004155, -18432 },
+ { 944935, -17408 },
+ { 889550, -16384 },
+ { 837731, -15360 },
+ { 789229, -14336 },
+ { 743813, -13312 },
+ { 701271, -12288 },
+ { 661405, -11264 },
+ { 624032, -10240 },
+ { 588982, -9216 },
+ { 556100, -8192 },
+ { 525239, -7168 },
+ { 496264, -6144 },
+ { 469050, -5120 },
+ { 443480, -4096 },
+ { 419448, -3072 },
+ { 396851, -2048 },
+ { 375597, -1024 },
+ { 355598, 0 },
+ { 336775, 1024 },
+ { 319052, 2048 },
+ { 302359, 3072 },
+ { 286630, 4096 },
+ { 271806, 5120 },
+ { 257829, 6144 },
+ { 244646, 7168 },
+ { 232209, 8192 },
+ { 220471, 9216 },
+ { 209390, 10240 },
+ { 198926, 11264 },
+ { 189040, 12288 },
+ { 179698, 13312 },
+ { 170868, 14336 },
+ { 162519, 15360 },
+ { 154622, 16384 },
+ { 147150, 17408 },
+ { 140079, 18432 },
+ { 133385, 19456 },
+ { 127046, 20480 },
+ { 121042, 21504 },
+ { 115352, 22528 },
+ { 109960, 23552 },
+ { 104848, 24576 },
+ { 100000, 25600 },
+ { 95402, 26624 },
+ { 91038, 27648 },
+ { 86897, 28672 },
+ { 82965, 29696 },
+ { 79232, 30720 },
+ { 75686, 31744 },
+ { 72316, 32768 },
+ { 69114, 33792 },
+ { 66070, 34816 },
+ { 63176, 35840 },
+ { 60423, 36864 },
+ { 57804, 37888 },
+ { 55312, 38912 },
+ { 52940, 39936 },
+ { 50681, 40960 },
+ { 48531, 41984 },
+ { 46482, 43008 },
+ { 44530, 44032 },
+ { 42670, 45056 },
+ { 40897, 46080 },
+ { 39207, 47104 },
+ { 37595, 48128 },
+ { 36057, 49152 },
+ { 34590, 50176 },
+ { 33190, 51200 },
+ { 31853, 52224 },
+ { 30577, 53248 },
+ { 29358, 54272 },
+ { 28194, 55296 },
+ { 27082, 56320 },
+ { 26020, 57344 },
+ { 25004, 58368 },
+ { 24033, 59392 },
+ { 23104, 60416 },
+ { 22216, 61440 },
+ { 21367, 62464 },
+ { 20554, 63488 },
+ { 19776, 64512 },
+ { 19031, 65536 },
+ { 18318, 66560 },
+ { 17636, 67584 },
+ { 16982, 68608 },
+ { 16355, 69632 },
+ { 15755, 70656 },
+ { 15180, 71680 },
+ { 14628, 72704 },
+ { 14099, 73728 },
+ { 13592, 74752 },
+ { 13106, 75776 },
+ { 12640, 76800 },
+ { 12192, 77824 },
+ { 11762, 78848 },
+ { 11350, 79872 },
+ { 10954, 80896 },
+ { 10574, 81920 },
+ { 10209, 82944 },
+ { 9858, 83968 },
+ { 9521, 84992 },
+ { 9197, 86016 },
+ { 8886, 87040 },
+ { 8587, 88064 },
+ { 8299, 89088 },
+ { 8023, 90112 },
+ { 7757, 91136 },
+ { 7501, 92160 },
+ { 7254, 93184 },
+ { 7017, 94208 },
+ { 6789, 95232 },
+ { 6570, 96256 },
+ { 6358, 97280 },
+ { 6155, 98304 },
+ { 5959, 99328 },
+ { 5770, 100352 },
+ { 5588, 101376 },
+ { 5412, 102400 },
+ { 5243, 103424 },
+ { 5080, 104448 },
+ { 4923, 105472 },
+ { 4771, 106496 },
+ { 4625, 107520 },
+ { 4484, 108544 },
+ { 4348, 109568 },
+ { 4217, 110592 },
+ { 4090, 111616 },
+ { 3968, 112640 },
+ { 3850, 113664 },
+ { 3736, 114688 },
+ { 3626, 115712 },
+ { 3519, 116736 },
+ { 3417, 117760 },
+ { 3317, 118784 },
+ { 3221, 119808 },
+ { 3129, 120832 },
+ { 3039, 121856 },
+ { 2952, 122880 },
+ { 2868, 123904 },
+ { 2787, 124928 },
+ { 2709, 125952 },
+ { 2633, 126976 },
+ { 2560, 128000 },
+ { 2489, 129024 },
+ { 2420, 130048 }
+};
+
+static const struct u32_fract adc5_prescale_ratios[] = {
+ { .numerator = 1, .denominator = 1 },
+ { .numerator = 1, .denominator = 3 },
+ { .numerator = 1, .denominator = 4 },
+ { .numerator = 1, .denominator = 6 },
+ { .numerator = 1, .denominator = 20 },
+ { .numerator = 1, .denominator = 8 },
+ { .numerator = 10, .denominator = 81 },
+ { .numerator = 1, .denominator = 10 },
+ { .numerator = 1, .denominator = 16 },
+};
+
+static int qcom_vadc_scale_hw_calib_volt(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_uv);
+static int qcom_vadc_scale_hw_calib_therm(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_therm(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_smb_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_chg5_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_calib_die_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_die_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec);
+
+static const struct qcom_adc5_scale_type scale_adc5_fn[] = {
+ [SCALE_HW_CALIB_DEFAULT] = {qcom_vadc_scale_hw_calib_volt},
+ [SCALE_HW_CALIB_THERM_100K_PULLUP] = {qcom_vadc_scale_hw_calib_therm},
+ [SCALE_HW_CALIB_XOTHERM] = {qcom_vadc_scale_hw_calib_therm},
+ [SCALE_HW_CALIB_THERM_100K_PU_PM7] = {
+ qcom_vadc7_scale_hw_calib_therm},
+ [SCALE_HW_CALIB_PMIC_THERM] = {qcom_vadc_scale_hw_calib_die_temp},
+ [SCALE_HW_CALIB_PMIC_THERM_PM7] = {
+ qcom_vadc7_scale_hw_calib_die_temp},
+ [SCALE_HW_CALIB_PM5_CHG_TEMP] = {qcom_vadc_scale_hw_chg5_temp},
+ [SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},
};
static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,
- u32 tablesize, s32 input, s64 *output)
+ u32 tablesize, s32 input, int *output)
{
- bool descending = 1;
u32 i = 0;
if (!pts)
return -EINVAL;
- /* Check if table is descending or ascending */
- if (tablesize > 1) {
- if (pts[0].x < pts[1].x)
- descending = 0;
- }
-
- while (i < tablesize) {
- if ((descending) && (pts[i].x < input)) {
- /* table entry is less than measured*/
- /* value and table is descending, stop */
- break;
- } else if ((!descending) &&
- (pts[i].x > input)) {
- /* table entry is greater than measured*/
- /*value and table is ascending, stop */
- break;
- }
+ while (i < tablesize && pts[i].x > input)
i++;
- }
if (i == 0) {
*output = pts[0].y;
} else if (i == tablesize) {
*output = pts[tablesize - 1].y;
} else {
- /* result is between search_index and search_index-1 */
/* interpolate linearly */
- *output = (((s32)((pts[i].y - pts[i - 1].y) *
- (input - pts[i - 1].x)) /
- (pts[i].x - pts[i - 1].x)) +
- pts[i - 1].y);
+ *output = fixp_linear_interpolate(pts[i - 1].x, pts[i - 1].y,
+ pts[i].x, pts[i].y,
+ input);
}
return 0;
}
+static s32 qcom_vadc_map_temp_voltage(const struct vadc_map_pt *pts,
+ u32 tablesize, int input)
+{
+ u32 i = 0;
+
+ /*
+ * Table must be sorted, find the interval of 'y' which contains value
+ * 'input' and map it to proper 'x' value
+ */
+ while (i < tablesize && pts[i].y < input)
+ i++;
+
+ if (i == 0)
+ return pts[0].x;
+ if (i == tablesize)
+ return pts[tablesize - 1].x;
+
+ /* interpolate linearly */
+ return fixp_linear_interpolate(pts[i - 1].y, pts[i - 1].x,
+ pts[i].y, pts[i].x, input);
+}
+
static void qcom_vadc_scale_calib(const struct vadc_linear_graph *calib_graph,
u16 adc_code,
bool absolute,
@@ -106,7 +406,7 @@ static void qcom_vadc_scale_calib(const struct vadc_linear_graph *calib_graph,
}
static int qcom_vadc_scale_volt(const struct vadc_linear_graph *calib_graph,
- const struct vadc_prescale_ratio *prescale,
+ const struct u32_fract *prescale,
bool absolute, u16 adc_code,
int *result_uv)
{
@@ -114,19 +414,19 @@ static int qcom_vadc_scale_volt(const struct vadc_linear_graph *calib_graph,
qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);
- voltage = voltage * prescale->den;
- result = div64_s64(voltage, prescale->num);
+ voltage *= prescale->denominator;
+ result = div64_s64(voltage, prescale->numerator);
*result_uv = result;
return 0;
}
static int qcom_vadc_scale_therm(const struct vadc_linear_graph *calib_graph,
- const struct vadc_prescale_ratio *prescale,
+ const struct u32_fract *prescale,
bool absolute, u16 adc_code,
int *result_mdec)
{
- s64 voltage = 0, result = 0;
+ s64 voltage = 0;
int ret;
qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);
@@ -136,18 +436,15 @@ static int qcom_vadc_scale_therm(const struct vadc_linear_graph *calib_graph,
ret = qcom_vadc_map_voltage_temp(adcmap_100k_104ef_104fb,
ARRAY_SIZE(adcmap_100k_104ef_104fb),
- voltage, &result);
+ voltage, result_mdec);
if (ret)
return ret;
- result *= 1000;
- *result_mdec = result;
-
return 0;
}
static int qcom_vadc_scale_die_temp(const struct vadc_linear_graph *calib_graph,
- const struct vadc_prescale_ratio *prescale,
+ const struct u32_fract *prescale,
bool absolute,
u16 adc_code, int *result_mdec)
{
@@ -157,21 +454,20 @@ static int qcom_vadc_scale_die_temp(const struct vadc_linear_graph *calib_graph,
qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);
if (voltage > 0) {
- temp = voltage * prescale->den;
- do_div(temp, prescale->num * 2);
+ temp = voltage * prescale->denominator;
+ do_div(temp, prescale->numerator * 2);
voltage = temp;
} else {
voltage = 0;
}
- voltage -= KELVINMIL_CELSIUSMIL;
- *result_mdec = voltage;
+ *result_mdec = milli_kelvin_to_millicelsius(voltage);
return 0;
}
static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph,
- const struct vadc_prescale_ratio *prescale,
+ const struct u32_fract *prescale,
bool absolute,
u16 adc_code, int *result_mdec)
{
@@ -179,8 +475,8 @@ static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph,
qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);
- voltage = voltage * prescale->den;
- voltage = div64_s64(voltage, prescale->num);
+ voltage *= prescale->denominator;
+ voltage = div64_s64(voltage, prescale->numerator);
voltage = ((PMI_CHG_SCALE_1) * (voltage * 2));
voltage = (voltage + PMI_CHG_SCALE_2);
result = div64_s64(voltage, 1000000);
@@ -189,9 +485,158 @@ static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph,
return 0;
}
+/* convert voltage to ADC code, using 1.875V reference */
+static u16 qcom_vadc_scale_voltage_code(s32 voltage,
+ const struct u32_fract *prescale,
+ const u32 full_scale_code_volt,
+ unsigned int factor)
+{
+ s64 volt = voltage;
+ s64 adc_vdd_ref_mv = 1875; /* reference voltage */
+
+ volt *= prescale->numerator * factor * full_scale_code_volt;
+ volt = div64_s64(volt, (s64)prescale->denominator * adc_vdd_ref_mv * 1000);
+
+ return volt;
+}
+
+static int qcom_vadc_scale_code_voltage_factor(u16 adc_code,
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ unsigned int factor)
+{
+ s64 voltage, temp, adc_vdd_ref_mv = 1875;
+
+ /*
+ * The normal data range is between 0V to 1.875V. On cases where
+ * we read low voltage values, the ADC code can go beyond the
+ * range and the scale result is incorrect so we clamp the values
+ * for the cases where the code represents a value below 0V
+ */
+ if (adc_code > VADC5_MAX_CODE)
+ adc_code = 0;
+
+ /* (ADC code * vref_vadc (1.875V)) / full_scale_code */
+ voltage = (s64) adc_code * adc_vdd_ref_mv * 1000;
+ voltage = div64_s64(voltage, data->full_scale_code_volt);
+ if (voltage > 0) {
+ voltage *= prescale->denominator;
+ temp = prescale->numerator * factor;
+ voltage = div64_s64(voltage, temp);
+ } else {
+ voltage = 0;
+ }
+
+ return (int) voltage;
+}
+
+static int qcom_vadc7_scale_hw_calib_therm(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+ s64 resistance = adc_code;
+ int ret, result;
+
+ if (adc_code >= RATIO_MAX_ADC7)
+ return -EINVAL;
+
+ /* (ADC code * R_PULLUP (100Kohm)) / (full_scale_code - ADC code)*/
+ resistance *= R_PU_100K;
+ resistance = div64_s64(resistance, RATIO_MAX_ADC7 - adc_code);
+
+ ret = qcom_vadc_map_voltage_temp(adcmap7_100k,
+ ARRAY_SIZE(adcmap7_100k),
+ resistance, &result);
+ if (ret)
+ return ret;
+
+ *result_mdec = result;
+
+ return 0;
+}
+
+static int qcom_vadc_scale_hw_calib_volt(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_uv)
+{
+ *result_uv = qcom_vadc_scale_code_voltage_factor(adc_code,
+ prescale, data, 1);
+
+ return 0;
+}
+
+static int qcom_vadc_scale_hw_calib_therm(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+ int voltage;
+
+ voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
+ prescale, data, 1000);
+
+ /* Map voltage to temperature from look-up table */
+ return qcom_vadc_map_voltage_temp(adcmap_100k_104ef_104fb_1875_vref,
+ ARRAY_SIZE(adcmap_100k_104ef_104fb_1875_vref),
+ voltage, result_mdec);
+}
+
+static int qcom_vadc_scale_hw_calib_die_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+ *result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code,
+ prescale, data, 2);
+ *result_mdec = milli_kelvin_to_millicelsius(*result_mdec);
+
+ return 0;
+}
+
+static int qcom_vadc7_scale_hw_calib_die_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+
+ int voltage;
+
+ voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
+ prescale, data, 1);
+
+ return qcom_vadc_map_voltage_temp(adcmap7_die_temp, ARRAY_SIZE(adcmap7_die_temp),
+ voltage, result_mdec);
+}
+
+static int qcom_vadc_scale_hw_smb_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+ *result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code * 100,
+ prescale, data, PMIC5_SMB_TEMP_SCALE_FACTOR);
+ *result_mdec = PMIC5_SMB_TEMP_CONSTANT - *result_mdec;
+
+ return 0;
+}
+
+static int qcom_vadc_scale_hw_chg5_temp(
+ const struct u32_fract *prescale,
+ const struct adc5_data *data,
+ u16 adc_code, int *result_mdec)
+{
+ *result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code,
+ prescale, data, 4);
+ *result_mdec = PMIC5_CHG_TEMP_SCALE_FACTOR - *result_mdec;
+
+ return 0;
+}
+
int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
const struct vadc_linear_graph *calib_graph,
- const struct vadc_prescale_ratio *prescale,
+ const struct u32_fract *prescale,
bool absolute,
u16 adc_code, int *result)
{
@@ -219,6 +664,100 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
}
EXPORT_SYMBOL(qcom_vadc_scale);
+u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
+ u32 full_scale_code_volt, int temp)
+{
+ const struct u32_fract *prescale = &adc5_prescale_ratios[prescale_ratio];
+ s32 voltage;
+
+ voltage = qcom_vadc_map_temp_voltage(adcmap_100k_104ef_104fb_1875_vref,
+ ARRAY_SIZE(adcmap_100k_104ef_104fb_1875_vref),
+ temp);
+ return qcom_vadc_scale_voltage_code(voltage, prescale, full_scale_code_volt, 1000);
+}
+EXPORT_SYMBOL(qcom_adc_tm5_temp_volt_scale);
+
+u16 qcom_adc_tm5_gen2_temp_res_scale(int temp)
+{
+ int64_t resistance;
+
+ resistance = qcom_vadc_map_temp_voltage(adcmap7_100k,
+ ARRAY_SIZE(adcmap7_100k), temp);
+
+ return div64_s64(resistance * RATIO_MAX_ADC7, resistance + R_PU_100K);
+}
+EXPORT_SYMBOL(qcom_adc_tm5_gen2_temp_res_scale);
+
+int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
+ unsigned int prescale_ratio,
+ const struct adc5_data *data,
+ u16 adc_code, int *result)
+{
+ const struct u32_fract *prescale = &adc5_prescale_ratios[prescale_ratio];
+
+ if (!(scaletype >= SCALE_HW_CALIB_DEFAULT &&
+ scaletype < SCALE_HW_CALIB_INVALID)) {
+ pr_err("Invalid scale type %d\n", scaletype);
+ return -EINVAL;
+ }
+
+ return scale_adc5_fn[scaletype].scale_fn(prescale, data,
+ adc_code, result);
+}
+EXPORT_SYMBOL(qcom_adc5_hw_scale);
+
+int qcom_adc5_prescaling_from_dt(u32 numerator, u32 denominator)
+{
+ unsigned int pre;
+
+ for (pre = 0; pre < ARRAY_SIZE(adc5_prescale_ratios); pre++)
+ if (adc5_prescale_ratios[pre].numerator == numerator &&
+ adc5_prescale_ratios[pre].denominator == denominator)
+ break;
+
+ if (pre == ARRAY_SIZE(adc5_prescale_ratios))
+ return -EINVAL;
+
+ return pre;
+}
+EXPORT_SYMBOL(qcom_adc5_prescaling_from_dt);
+
+int qcom_adc5_hw_settle_time_from_dt(u32 value,
+ const unsigned int *hw_settle)
+{
+ unsigned int i;
+
+ for (i = 0; i < VADC_HW_SETTLE_SAMPLES_MAX; i++) {
+ if (value == hw_settle[i])
+ return i;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(qcom_adc5_hw_settle_time_from_dt);
+
+int qcom_adc5_avg_samples_from_dt(u32 value)
+{
+ if (!is_power_of_2(value) || value > ADC5_AVG_SAMPLES_MAX)
+ return -EINVAL;
+
+ return __ffs(value);
+}
+EXPORT_SYMBOL(qcom_adc5_avg_samples_from_dt);
+
+int qcom_adc5_decimation_from_dt(u32 value, const unsigned int *decimation)
+{
+ unsigned int i;
+
+ for (i = 0; i < ADC5_DECIMATION_SAMPLES_MAX; i++) {
+ if (value == decimation[i])
+ return i;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(qcom_adc5_decimation_from_dt);
+
int qcom_vadc_decimation_from_dt(u32 value)
{
if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN ||
@@ -228,3 +767,6 @@ int qcom_vadc_decimation_from_dt(u32 value)
return __ffs64(value / VADC_DECIMATION_MIN);
}
EXPORT_SYMBOL(qcom_vadc_decimation_from_dt);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm ADC common functionality");
generated by cgit (git 2.34.1) at 2025-12-25 00:39:18 +0000