From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Phani A, Rama Krishna" Subject: Re: [PATCH V5 2/2] iio: adc: spmi-vadc: Changes to support different scaling Date: Fri, 9 Dec 2016 20:10:54 +0530 Message-ID: <4332e164-e4a7-31e2-356f-dc6d409e9f8d@codeaurora.org> References: <1479965465-30182-1-git-send-email-rphani@codeaurora.org> <1479965465-30182-3-git-send-email-rphani@codeaurora.org> <13ba4983-db04-4ea3-73c0-6b82a319322b@kernel.org> <4bd45f1b-d2c2-a7e6-d0f4-0cfbb196f805@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4bd45f1b-d2c2-a7e6-d0f4-0cfbb196f805-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: linux-iio-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jonathan Cameron , linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cdevired-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, smohanad-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, mgautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, sivaa-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, knaack.h-Mmb7MZpHnFY@public.gmane.org, lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org, pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org, Julia.Lawall-L2FTfq7BK8M@public.gmane.org List-Id: linux-arm-msm@vger.kernel.org Hi Jonathan, On 03-Dec-16 3:19 PM, Jonathan Cameron wrote: > 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 >>> 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. Sure ., Will fix this and will post next patch. >> >> 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 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-iio" in >> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > Thanks, Ramakrishna From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH V5 2/2] iio: adc: spmi-vadc: Changes to support different scaling To: Jonathan Cameron , linux-iio@vger.kernel.org References: <1479965465-30182-1-git-send-email-rphani@codeaurora.org> <1479965465-30182-3-git-send-email-rphani@codeaurora.org> <13ba4983-db04-4ea3-73c0-6b82a319322b@kernel.org> <4bd45f1b-d2c2-a7e6-d0f4-0cfbb196f805@kernel.org> Cc: linux-arm-msm@vger.kernel.org, cdevired@codeaurora.org, smohanad@codeaurora.org, mgautam@codeaurora.org, sivaa@codeaurora.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, Julia.Lawall@lip6.fr From: "Phani A, Rama Krishna" Message-ID: <4332e164-e4a7-31e2-356f-dc6d409e9f8d@codeaurora.org> Date: Fri, 9 Dec 2016 20:10:54 +0530 MIME-Version: 1.0 In-Reply-To: <4bd45f1b-d2c2-a7e6-d0f4-0cfbb196f805@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed List-ID: Hi Jonathan, On 03-Dec-16 3:19 PM, Jonathan Cameron wrote: > 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 >>> 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. Sure ., Will fix this and will post next patch. >> >> 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 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-iio" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > Thanks, Ramakrishna