On 30/11/16 09:07, Phani A, Rama Krishna wrote:
> Hi Jonathan,
>
> On 27-Nov-16 9:18 PM, Jonathan Cameron wrote:
>> On 24/11/16 05:31, Rama Krishna Phani A wrote:
>>> Several ADC channels are supported in PMIC which can be used to
>>> measure voltage, temperature, current etc. Different scaling can be
>>> applied on the obtained voltage to report in physical units. Scaling
>>> functionality can be different per channel. Add scaling support per
>>> channel. Every channel present in adc has an unique conversion formula
>>> for obtained voltage. Add support to report in Raw as well as in
>>> processed format. Scaling is applied when processed read is requested
>>> and is not applied when a Raw read is requested.
>>>
>>> Signed-off-by: Rama Krishna Phani A <rphani@xxxxxxxxxxxxxx>
>> I obviously didn't make it clear enough in last review.
>>
>> If you can't return a value in response to reading a sysfs attribute, the
>> attribute should not exist. See below for a suggestion on this.
> Agree., Even here we never expose a channel in sysfs if we dont know the response. Channels in sysfs are populated based on list available from DT. Provided more explanation below.
>>
>> Jonathan
>>> ---
>>> drivers/iio/adc/qcom-spmi-vadc.c | 435 +++++++++++++++++++++++++++++----------
>>> 1 file changed, 326 insertions(+), 109 deletions(-)
>>>
>>> diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
>>> index 93c0639..a4e5405 100644
>>> --- a/drivers/iio/adc/qcom-spmi-vadc.c
>>> +++ b/drivers/iio/adc/qcom-spmi-vadc.c
>>> @@ -84,7 +84,7 @@
>>> #define VADC_MAX_ADC_CODE 0xa800
>>>
>>> #define VADC_ABSOLUTE_RANGE_UV 625000
>>> -#define VADC_RATIOMETRIC_RANGE_UV 1800000
>>> +#define VADC_RATIOMETRIC_RANGE 1800
>>>
>>> #define VADC_DEF_PRESCALING 0 /* 1:1 */
>>> #define VADC_DEF_DECIMATION 0 /* 512 */
>>> @@ -100,9 +100,23 @@
>>>
>>> #define KELVINMIL_CELSIUSMIL 273150
>>>
>>> +#define PMI_CHG_SCALE_1 -138890
>>> +#define PMI_CHG_SCALE_2 391750000000
>>> +
>>> #define VADC_CHAN_MIN VADC_USBIN
>>> #define VADC_CHAN_MAX VADC_LR_MUX3_BUF_PU1_PU2_XO_THERM
>>>
>>> +/**
>>> + * 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;
>>> +};
>>> +
>>> /*
>>> * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels.
>>> * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for
>>> @@ -148,6 +162,9 @@ struct vadc_prescale_ratio {
>>> * start of conversion.
>>> * @avg_samples: ability to provide single result from the ADC
>>> * that is an average of multiple measurements.
>>> + * @scale_fn: Represents the scaling function to convert voltage
>>> + * physical units desired by the client for the channel.
>>> + * Referenced from enum vadc_scale_fn_type.
>>> */
>>> struct vadc_channel_prop {
>>> unsigned int channel;
>>> @@ -156,6 +173,7 @@ struct vadc_channel_prop {
>>> unsigned int prescale;
>>> unsigned int hw_settle_time;
>>> unsigned int avg_samples;
>>> + unsigned int scale_fn;
>>> };
>>>
>>> /**
>>> @@ -186,6 +204,37 @@ struct vadc_priv {
>>> struct mutex lock;
>>> };
>>>
>>> +/**
>>> + * struct vadc_scale_fn - Scaling function prototype
>>> + * @scale: Function pointer to one of the scaling functions
>>> + * which takes the adc properties, channel properties,
>>> + * and returns the physical result.
>>> + */
>>> +struct vadc_scale_fn {
>>> + int (*scale)(struct vadc_priv *, const struct vadc_channel_prop *,
>>> + u16, int *);
>>> +};
>>> +
>>> +/**
>>> + * enum vadc_scale_fn_type - Scaling function to convert ADC code to
>>> + * physical scaled units for the channel.
>>> + * SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV).
>>> + * SCALE_THERM_100K_PULLUP: Returns temperature in millidegC.
>>> + * Uses a mapping table with 100K pullup.
>>> + * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade.
>>> + * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC.
>>> + * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp
>>> + * SCALE_NONE: Do not use this scaling type.
>>> + */
>>> +enum vadc_scale_fn_type {
>>> + SCALE_DEFAULT = 0,
>>> + SCALE_THERM_100K_PULLUP,
>>> + SCALE_PMIC_THERM,
>>> + SCALE_XOTHERM,
>>> + SCALE_PMI_CHG_TEMP,
>>> + SCALE_NONE,
>>> +};
>>> +
>>> static const struct vadc_prescale_ratio vadc_prescale_ratios[] = {
>>> {.num = 1, .den = 1},
>>> {.num = 1, .den = 3},
>>> @@ -197,6 +246,44 @@ struct vadc_priv {
>>> {.num = 1, .den = 10}
>>> };
>>>
>>> +/* 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}
>>> +};
>>> +
>>> static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data)
>>> {
>>> return regmap_bulk_read(vadc->regmap, vadc->base + offset, data, 1);
>>> @@ -418,7 +505,7 @@ static int vadc_measure_ref_points(struct vadc_priv *vadc)
>>> u16 read_1, read_2;
>>> int ret;
>>>
>>> - vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE_UV;
>>> + vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;
>>> vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV;
>>>
>>> prop = vadc_get_channel(vadc, VADC_REF_1250MV);
>>> @@ -468,6 +555,51 @@ static int vadc_measure_ref_points(struct vadc_priv *vadc)
>>> return ret;
>>> }
>>>
>>> +static int vadc_map_voltage_temp(const struct vadc_map_pt *pts,
>>> + u32 tablesize, s32 input, s64 *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;
>>> + }
>>> + 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);
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static void vadc_scale_calib(struct vadc_priv *vadc, u16 adc_code,
>>> const struct vadc_channel_prop *prop,
>>> s64 *scale_voltage)
>>> @@ -502,6 +634,77 @@ static int vadc_scale_volt(struct vadc_priv *vadc,
>>> return 0;
>>> }
>>>
>>> +static int vadc_scale_therm(struct vadc_priv *vadc,
>>> + const struct vadc_channel_prop *prop, u16 adc_code,
>>> + int *result_mdec)
>>> +{
>>> + s64 voltage = 0, result = 0;
>>> +
>>> + vadc_scale_calib(vadc, adc_code, prop, &voltage);
>>> +
>>> + if (prop->calibration == VADC_CALIB_ABSOLUTE)
>>> + voltage /= 1000;
>>> +
>>> + vadc_map_voltage_temp(adcmap_100k_104ef_104fb,
>>> + ARRAY_SIZE(adcmap_100k_104ef_104fb),
>>> + voltage, &result);
>>> + result *= 1000;
>>> + *result_mdec = result;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int vadc_scale_die_temp(struct vadc_priv *vadc,
>>> + const struct vadc_channel_prop *prop,
>>> + u16 adc_code, int *result_mdec)
>>> +{
>>> + const struct vadc_prescale_ratio *prescale;
>>> + s64 voltage = 0;
>>> +
>>> + vadc_scale_calib(vadc, adc_code, prop, &voltage);
>>> +
>>> + if (voltage > 0) {
>>> + prescale = &vadc_prescale_ratios[prop->prescale];
>>> + voltage = voltage * prescale->den;
>>> + voltage /= (prescale->num * 2);
>>> + } else {
>>> + voltage = 0;
>>> + }
>>> +
>>> + voltage -= KELVINMIL_CELSIUSMIL;
>>> + *result_mdec = voltage;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int vadc_scale_chg_temp(struct vadc_priv *vadc,
>>> + const struct vadc_channel_prop *prop,
>>> + u16 adc_code, int *result_mdec)
>>> +{
>>> + const struct vadc_prescale_ratio *prescale;
>>> + s64 voltage = 0, result = 0;
>>> +
>>> + vadc_scale_calib(vadc, adc_code, prop, &voltage);
>>> +
>>> + prescale = &vadc_prescale_ratios[prop->prescale];
>>> + voltage = voltage * prescale->den;
>>> + voltage = div64_s64(voltage, prescale->num);
>>> + voltage = ((PMI_CHG_SCALE_1) * (voltage * 2));
>>> + voltage = (voltage + PMI_CHG_SCALE_2);
>>> + result = div64_s64(voltage, 1000000);
>>> + *result_mdec = result;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int vadc_scale(struct vadc_priv *vadc,
>>> + const struct vadc_channel_prop *prop, u16 adc_code,
>>> + int *scale)
>>> +{
>>> + dev_err(vadc->dev, "Need a scale function\n");
>>> + return 0;
>>> +}
>>> +
>>> static int vadc_decimation_from_dt(u32 value)
>>> {
>>> if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN ||
>>> @@ -547,6 +750,15 @@ static int vadc_avg_samples_from_dt(u32 value)
>>> return __ffs64(value);
>>> }
>>>
>>> +static struct vadc_scale_fn scale_fn[] = {
>>> + [SCALE_DEFAULT] = {vadc_scale_volt},
>>> + [SCALE_THERM_100K_PULLUP] = {vadc_scale_therm},
>>> + [SCALE_PMIC_THERM] = {vadc_scale_die_temp},
>>> + [SCALE_XOTHERM] = {vadc_scale_therm},
>>> + [SCALE_PMI_CHG_TEMP] = {vadc_scale_chg_temp},
>>> + [SCALE_NONE] = {vadc_scale},
>>> +};
>>> +
>>> static int vadc_read_raw(struct iio_dev *indio_dev,
>>> struct iio_chan_spec const *chan, int *val, int *val2,
>>> long mask)
>>> @@ -563,7 +775,7 @@ static int vadc_read_raw(struct iio_dev *indio_dev,
>>> if (ret)
>>> break;
>>>
>>> - vadc_scale_volt(vadc, prop, adc_code, val);
>>> + scale_fn[prop->scale_fn].scale(vadc, prop, adc_code, val);
>>>
>>> return IIO_VAL_INT;
>>> case IIO_CHAN_INFO_RAW:
>>> @@ -606,23 +818,27 @@ struct vadc_channels {
>>> unsigned int prescale_index;
>>> enum iio_chan_type type;
>>> long info_mask;
>>> + unsigned int scale_fn;
>>> };
>>>
>>> -#define VADC_CHAN(_dname, _type, _mask, _pre) \
>>> +#define VADC_CHAN(_dname, _type, _mask, _pre, _scale) \
>>> [VADC_##_dname] = { \
>>> .datasheet_name = __stringify(_dname), \
>>> .prescale_index = _pre, \
>>> .type = _type, \
>>> - .info_mask = _mask \
>>> + .info_mask = _mask, \
>>> + .scale_fn = _scale \
>>> }, \
>>>
>>> -#define VADC_CHAN_TEMP(_dname, _pre) \
>>> - VADC_CHAN(_dname, IIO_TEMP, BIT(IIO_CHAN_INFO_PROCESSED), _pre) \
>>> +#define VADC_CHAN_TEMP(_dname, _pre, _scale) \
>>> + VADC_CHAN(_dname, IIO_TEMP, \
>>> + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED), \
>>> + _pre, _scale) \
>>>
>>> -#define VADC_CHAN_VOLT(_dname, _pre) \
>>> +#define VADC_CHAN_VOLT(_dname, _pre, _scale) \
>>> VADC_CHAN(_dname, IIO_VOLTAGE, \
>>> BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED),\
>>> - _pre) \
>>> + _pre, _scale) \
>> In the SCALE_NONE case you are still creating the sysfs attributes to provide
>> processed. Just have a variant of this macro that doesn't do this.
>>
>> That way we don't end up with a sysfs attribute that always results in
>> an error!
>>
>> #define VADC_CHAN_VOLT_NO_KNOWN_SCALEE(_dname, _pre) \
>> VADC_CHAN(_dname, IIO_VOLTAGE, BIT(IIO_CHAN_INFO_RAW), _pre);
>>
> sysfs attributes will be created only for the channels that are populated from DT. Here we are just mapping a function that needs to be invoked in case the channel is available.
>
> None of the channels are exposed in sysfs unconditionally. Channels with DT entry only will get exposed in sysfs.
>
> For SCALE_NONE .., none of these channels will get exposed in sysfs.
> Even for other SCALE_* ., the channels will be shown in sysfs only if there is any corresponding DT entry for that channel.
But if someone does write a DT that specifies those channels then it'll be wrong.
The fix is easy. Fix it in here.
>
> If an entry is created for channels with SCALE_NONE in DT ., then the corresponding SCALE_* function needs to be implemented by removing SCALE_NONE.
>>>
>>> /*
>>> * The array represents all possible ADC channels found in the supported PMICs.
>>> @@ -630,106 +846,106 @@ struct vadc_channels {
>>> * gaps in the array should be treated as reserved channels.
>>> */
>>> static const struct vadc_channels vadc_chans[] = {
>>> - VADC_CHAN_VOLT(USBIN, 4)
>>> - VADC_CHAN_VOLT(DCIN, 4)
>>> - VADC_CHAN_VOLT(VCHG_SNS, 3)
>>> - VADC_CHAN_VOLT(SPARE1_03, 1)
>>> - VADC_CHAN_VOLT(USB_ID_MV, 1)
>>> - VADC_CHAN_VOLT(VCOIN, 1)
>>> - VADC_CHAN_VOLT(VBAT_SNS, 1)
>>> - VADC_CHAN_VOLT(VSYS, 1)
>>> - VADC_CHAN_TEMP(DIE_TEMP, 0)
>>> - VADC_CHAN_VOLT(REF_625MV, 0)
>>> - VADC_CHAN_VOLT(REF_1250MV, 0)
>>> - VADC_CHAN_VOLT(CHG_TEMP, 0)
>>> - VADC_CHAN_VOLT(SPARE1, 0)
>>> - VADC_CHAN_VOLT(SPARE2, 0)
>>> - VADC_CHAN_VOLT(GND_REF, 0)
>>> - VADC_CHAN_VOLT(VDD_VADC, 0)
>>> -
>>> - VADC_CHAN_VOLT(P_MUX1_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX2_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX3_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX4_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX5_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX6_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX7_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX8_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX9_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX10_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX11_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX12_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX13_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX14_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX15_1_1, 0)
>>> - VADC_CHAN_VOLT(P_MUX16_1_1, 0)
>>> -
>>> - VADC_CHAN_VOLT(P_MUX1_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX2_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX3_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX4_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX5_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX6_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX7_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX8_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX9_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX10_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX11_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX12_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX13_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX14_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX15_1_3, 1)
>>> - VADC_CHAN_VOLT(P_MUX16_1_3, 1)
>>> -
>>> - VADC_CHAN_VOLT(LR_MUX1_BAT_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_XO_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX4_AMUX_THM1, 0)
>>> - VADC_CHAN_VOLT(LR_MUX5_AMUX_THM2, 0)
>>> - VADC_CHAN_VOLT(LR_MUX6_AMUX_THM3, 0)
>>> - VADC_CHAN_VOLT(LR_MUX7_HW_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX8_AMUX_THM4, 0)
>>> - VADC_CHAN_VOLT(LR_MUX9_AMUX_THM5, 0)
>>> - VADC_CHAN_VOLT(LR_MUX10_USB_ID, 0)
>>> - VADC_CHAN_VOLT(AMUX_PU1, 0)
>>> - VADC_CHAN_VOLT(AMUX_PU2, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_BUF_XO_THERM, 0)
>>> -
>>> - VADC_CHAN_VOLT(LR_MUX1_PU1_BAT_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX2_PU1_BAT_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_PU1_XO_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX4_PU1_AMUX_THM1, 0)
>>> - VADC_CHAN_VOLT(LR_MUX5_PU1_AMUX_THM2, 0)
>>> - VADC_CHAN_VOLT(LR_MUX6_PU1_AMUX_THM3, 0)
>>> - VADC_CHAN_VOLT(LR_MUX7_PU1_AMUX_HW_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX8_PU1_AMUX_THM4, 0)
>>> - VADC_CHAN_VOLT(LR_MUX9_PU1_AMUX_THM5, 0)
>>> - VADC_CHAN_VOLT(LR_MUX10_PU1_AMUX_USB_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_BUF_PU1_XO_THERM, 0)
>>> -
>>> - VADC_CHAN_VOLT(LR_MUX1_PU2_BAT_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX2_PU2_BAT_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_PU2_XO_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX4_PU2_AMUX_THM1, 0)
>>> - VADC_CHAN_VOLT(LR_MUX5_PU2_AMUX_THM2, 0)
>>> - VADC_CHAN_VOLT(LR_MUX6_PU2_AMUX_THM3, 0)
>>> - VADC_CHAN_VOLT(LR_MUX7_PU2_AMUX_HW_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX8_PU2_AMUX_THM4, 0)
>> - VADC_CHAN_VOLT(LR_MUX9_PU2_AMUX_THM5, 0)
>>> - VADC_CHAN_VOLT(LR_MUX10_PU2_AMUX_USB_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_BUF_PU2_XO_THERM, 0)
>>> -
>>> - VADC_CHAN_VOLT(LR_MUX1_PU1_PU2_BAT_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX2_PU1_PU2_BAT_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_PU1_PU2_XO_THERM, 0)
>>> - VADC_CHAN_VOLT(LR_MUX4_PU1_PU2_AMUX_THM1, 0)
>>> - VADC_CHAN_VOLT(LR_MUX5_PU1_PU2_AMUX_THM2, 0)
>>> - VADC_CHAN_VOLT(LR_MUX6_PU1_PU2_AMUX_THM3, 0)
>>> - VADC_CHAN_VOLT(LR_MUX7_PU1_PU2_AMUX_HW_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX8_PU1_PU2_AMUX_THM4, 0)
>>> - VADC_CHAN_VOLT(LR_MUX9_PU1_PU2_AMUX_THM5, 0)
>>> - VADC_CHAN_VOLT(LR_MUX10_PU1_PU2_AMUX_USB_ID, 0)
>>> - VADC_CHAN_VOLT(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0)
>>> + VADC_CHAN_VOLT(USBIN, 4, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(DCIN, 4, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(VCHG_SNS, 3, SCALE_NONE)
>>> + VADC_CHAN_VOLT(SPARE1_03, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(USB_ID_MV, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(VCOIN, 1, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(VBAT_SNS, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(VSYS, 1, SCALE_DEFAULT)
>>> + VADC_CHAN_TEMP(DIE_TEMP, 0, SCALE_PMIC_THERM)
>>> + VADC_CHAN_VOLT(REF_625MV, 0, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(REF_1250MV, 0, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(CHG_TEMP, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(SPARE1, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(SPARE2, 0, SCALE_PMI_CHG_TEMP)
>>> + VADC_CHAN_VOLT(GND_REF, 0, SCALE_DEFAULT)
>>> + VADC_CHAN_VOLT(VDD_VADC, 0, SCALE_DEFAULT)
>>> +
>>> + VADC_CHAN_VOLT(P_MUX1_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX2_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX3_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX4_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX5_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX6_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX7_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX8_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX9_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX10_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX11_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX12_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX13_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX14_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX15_1_1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX16_1_1, 0, SCALE_NONE)
>>> +
>>> + VADC_CHAN_VOLT(P_MUX1_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX2_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX3_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX4_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX5_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX6_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX7_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX8_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX9_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX10_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX11_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX12_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX13_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX14_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX15_1_3, 1, SCALE_NONE)
>>> + VADC_CHAN_VOLT(P_MUX16_1_3, 1, SCALE_NONE)
>>> +
>>> + VADC_CHAN_VOLT(LR_MUX1_BAT_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX3_XO_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX4_AMUX_THM1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX5_AMUX_THM2, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX6_AMUX_THM3, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX7_HW_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX8_AMUX_THM4, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX9_AMUX_THM5, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX10_USB_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(AMUX_PU1, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(AMUX_PU2, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX3_BUF_XO_THERM, 0, SCALE_NONE)
>>> +
>>> + VADC_CHAN_TEMP(LR_MUX1_PU1_BAT_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX2_PU1_BAT_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_PU1_XO_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX4_PU1_AMUX_THM1, 0, SCALE_THERM_100K_PULLUP)
>>> + VADC_CHAN_TEMP(LR_MUX5_PU1_AMUX_THM2, 0, SCALE_THERM_100K_PULLUP)
>>> + VADC_CHAN_TEMP(LR_MUX6_PU1_AMUX_THM3, 0, SCALE_THERM_100K_PULLUP)
>>> + VADC_CHAN_VOLT(LR_MUX7_PU1_AMUX_HW_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX8_PU1_AMUX_THM4, 0, SCALE_THERM_100K_PULLUP)
>>> + VADC_CHAN_TEMP(LR_MUX9_PU1_AMUX_THM5, 0, SCALE_THERM_100K_PULLUP)
>>> + VADC_CHAN_VOLT(LR_MUX10_PU1_AMUX_USB_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_BUF_PU1_XO_THERM, 0, SCALE_XOTHERM)
>>> +
>>> + VADC_CHAN_TEMP(LR_MUX1_PU2_BAT_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX2_PU2_BAT_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_PU2_XO_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX4_PU2_AMUX_THM1, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX5_PU2_AMUX_THM2, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX6_PU2_AMUX_THM3, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX7_PU2_AMUX_HW_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX8_PU2_AMUX_THM4, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX9_PU2_AMUX_THM5, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX10_PU2_AMUX_USB_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_BUF_PU2_XO_THERM, 0, SCALE_NONE)
>>> +
>>> + VADC_CHAN_TEMP(LR_MUX1_PU1_PU2_BAT_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX2_PU1_PU2_BAT_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_PU1_PU2_XO_THERM, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX4_PU1_PU2_AMUX_THM1, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX5_PU1_PU2_AMUX_THM2, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX6_PU1_PU2_AMUX_THM3, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX7_PU1_PU2_AMUX_HW_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX8_PU1_PU2_AMUX_THM4, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX9_PU1_PU2_AMUX_THM5, 0, SCALE_NONE)
>>> + VADC_CHAN_VOLT(LR_MUX10_PU1_PU2_AMUX_USB_ID, 0, SCALE_NONE)
>>> + VADC_CHAN_TEMP(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0, SCALE_NONE)
>>> };
>>>
>>> static int vadc_get_dt_channel_data(struct device *dev,
>>> @@ -848,6 +1064,7 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
>>> return ret;
>>> }
>>>
>>> + prop.scale_fn = vadc_chans[prop.channel].scale_fn;
>>> vadc->chan_props[index] = prop;
>>>
>>> vadc_chan = &vadc_chans[prop.channel];
>>>
>>
> Thanks,
> Ramakrishna
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