> The voltage ADC is peripheral of Qualcomm SPMI PMIC chips. It has
> 15bits resolution and register space inside PMIC accessible across
> SPMI bus.
>
> The vadc driver registers itself through IIO interface.
several trivial comments below
there plenty of device-specific sysfs attributes which need to be
documented (in ABI/testing/sysfs-bus-iio-xxx)
> Signed-off-by: Stanimir Varbanov <svarbanov@xxxxxxxxxx>
> Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
> ---
> drivers/iio/adc/Kconfig | 11 +
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/qcom-spmi-vadc.c | 1275 +++++++++++++++++++++++++
> include/dt-bindings/iio/qcom,spmi-pmic-vadc.h | 119 +++
> 4 files changed, 1406 insertions(+), 0 deletions(-)
> create mode 100644 drivers/iio/adc/qcom-spmi-vadc.c
> create mode 100644 include/dt-bindings/iio/qcom,spmi-pmic-vadc.h
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 11b048a..e652d40 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -279,4 +279,15 @@ config XILINX_XADC
> The driver can also be build as a module. If so, the module will be called
> xilinx-xadc.
>
> +config QCOM_SPMI_VADC
alphabetic order please
> + tristate "Qualcomm SPMI PMIC voltage ADC"
> + depends on SPMI
> + help
> + Say yes here if you want support for the Qualcomm SPMI PMIC voltage ADC.
> +
> + The driver supports reading the HKADC, XOADC through the ADC AMUX arbiter.
> + The VADC includes support for the conversion sequencer. The driver
> + supports reading the ADC through the AMUX channels for external pull-ups
> + simultaneously.
> +
> endmenu
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index ad81b51..050cc96 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -30,3 +30,4 @@ obj-$(CONFIG_VF610_ADC) += vf610_adc.o
> obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o
> xilinx-xadc-y := xilinx-xadc-core.o xilinx-xadc-events.o
> obj-$(CONFIG_XILINX_XADC) += xilinx-xadc.o
> +obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o
> diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
> new file mode 100644
> index 0000000..0c500df
> --- /dev/null
> +++ b/drivers/iio/adc/qcom-spmi-vadc.c
> @@ -0,0 +1,1275 @@
> +/*
> + * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/completion.h>
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/sysfs.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/mutex.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +#include <linux/log2.h>
log2 needed?
> +
> +#include <dt-bindings/iio/qcom,spmi-pmic-vadc.h>
> +
> +/* QPNP VADC register and bit definition */
what is QPNP?
> +#define VADC_REVISION2 0x1
PREFIX should probably be QCOM_SPMI_VADC_
> +#define VADC_REVISION2_SUPPORTED_VADC 1
> +
> +#define VADC_PERPH_TYPE 0x4
> +#define VADC_PERPH_TYPE_ADC 8
> +
> +#define VADC_PERPH_SUBTYPE 0x5
> +#define VADC_PERPH_SUBTYPE_VADC 1
> +
> +#define VADC_STATUS1 0x8
> +#define VADC_STATUS1_OP_MODE 4
> +#define VADC_STATUS1_REQ_STS BIT(1)
> +#define VADC_STATUS1_EOC BIT(0)
> +#define VADC_STATUS1_REQ_STS_EOC_MASK 0x3
> +
> +#define VADC_MODE_CTL 0x40
> +#define VADC_OP_MODE_SHIFT 3
> +#define VADC_OP_MODE_NORMAL 0
> +#define VADC_AMUX_TRIM_EN BIT(1)
> +#define VADC_ADC_TRIM_EN BIT(0)
> +
> +#define VADC_EN_CTL1 0x46
> +#define VADC_EN_CTL1_SET BIT(7)
> +
> +#define VADC_ADC_CH_SEL_CTL 0x48
> +
> +#define VADC_ADC_DIG_PARAM 0x50
> +#define VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT 2
> +
> +#define VADC_HW_SETTLE_DELAY 0x51
> +
> +#define VADC_CONV_REQ 0x52
> +#define VADC_CONV_REQ_SET BIT(7)
> +
> +#define VADC_FAST_AVG_CTL 0x5a
> +#define VADC_FAST_AVG_EN 0x5b
> +#define VADC_FAST_AVG_EN_SET BIT(7)
> +
> +#define VADC_ACCESS 0xd0
> +#define VADC_ACCESS_DATA 0xa5
> +
> +#define VADC_PERH_RESET_CTL3 0xda
> +#define VADC_FOLLOW_WARM_RB BIT(2)
> +
> +#define VADC_DATA0 0x60
> +#define VADC_DATA1 0x61
> +
> +#define VADC_CONV_TIME_MIN_US 2000
> +#define VADC_CONV_TIME_MAX_US 2100
> +
> +/* Min ADC code represets 0V */
represents
> +#define VADC_MIN_ADC_CODE 0x6000
> +/* Max ADC code represents full-scale range of 1.8V */
> +#define VADC_MAX_ADC_CODE 0xA800
> +
> +#define VADC_ABSOLUTE_RANGE_UV 625000
> +#define VADC_RATIOMETRIC_RANGE_UV 1800000
> +
> +#define VADC_DEF_PRESCALING 0 /* 1:1 */
> +#define VADC_DEF_DECIMATION 0 /* 512 */
> +#define VADC_DEF_HW_SETTLE_TIME 0 /* 0 us */
> +#define VADC_DEF_AVG_SAMPLES 0 /* 1 sample */
> +#define VADC_DEF_CALIB_TYPE VADC_CALIB_ABSOLUTE
> +
> +#define VADC_DECIMATION_MIN 512
> +#define VADC_DECIMATION_MAX 4096
> +
> +#define VADC_HW_SETTLE_DELAY_MAX 10000
> +#define VADC_AVG_SAMPLES_MAX 512
> +
> +/*
> + * VADC_CALIB_ABSOLUTE: Uses the 625mv and 1.25V reference channels.
mV
> + * VADC_CALIB_RATIOMETRIC: Uses the reference Voltage/GND for calibration.
> + */
> +enum vadc_calibration {
> + VADC_CALIB_ABSOLUTE = 0,
> + VADC_CALIB_RATIOMETRIC
> +};
> +
> +/*
> + * struct vadc_linear_graph - Represent ADC characteristics.
> + * @dy: Numerator slope to calculate the gain.
> + * @dx: Denominator slope to calculate the gain.
> + * @vref: A/D word of the voltage reference used for the channel.
> + * @gnd: A/D word of the ground reference used for the channel.
> + *
> + * Each ADC device has different offset and gain parameters which are
> + * computed to calibrate the device.
> + */
> +struct vadc_linear_graph {
> + s64 dy;
> + s64 dx;
> + s64 vref;
> + s64 gnd;
> +};
> +
the documenting comments are inconsistent, @ above, but not below
some are kerneldoc (i.e. /**, others are not)
> +/*
> + * struct vadc_prescaling - Represent scaling ratio for ADC input.
> + * num: The inverse numerator of the gain applied to the input channel.
> + * den: The inverse denominator of the gain applied to the input channel.
> + */
> +struct vadc_prescaling {
> + s32 num;
> + s32 den;
> +};
> +
> +/**
> + * struct vadc_result - Represent the res of the QPNP ADC.
> + * @adc_code: The pre-calibrated digital output of a given ADC relative to the
> + * the ADC reference.
> + * @measurement: In units specific for a given ADC; most ADC uses reference
> + * voltage but some ADC uses reference current. This measurement
use
> + * here is a number relative to a reference of a given ADC.
> + * @physical: The data meaningful for each individual channel whether it is
> + * voltage, current, temperature, etc.
> + */
> +struct vadc_result {
> + s32 adc_code;
> + s64 measurement;
> + s64 physical;
> +};
> +
> +/*
> + * struct vadc_channel - QPNP VADC amux channel property.
> + * @name - AMUX channel name.
> + * @number - Channel number, refer to the channel list.
> + * @calibration - Calibration type.
> + * @decimation - Sampling rate supported for the channel.
> + * @prescaling - Channel scaling performed on the input signal.
> + * @hw_settle_time - The time between AMUX being configured and the
> + * start of conversion.
> + * @avg_samples - Ability to provide single result from the ADC
> + * that is an average of multiple measurements.
> + */
> +struct vadc_channel {
> + const char *name;
> + int number;
> + enum vadc_calibration calibration;
> + unsigned decimation;
> + unsigned prescaling;
> + unsigned hw_settle_time;
> + unsigned avg_samples;
> +};
> +
> +/**
> + * struct vadc_drv - QPNP ADC device structure.
vadc_chip?
> + * @regmap -
> + * @base - base offset for the ADC peripheral.
> + * @dev - ADC properties specific to the ADC peripheral.
base missing?
> + * @nchannels -
> + * @channels - AMUX properties representing the ADC peripheral.
> + * @is_callibrated -
mis-spelled 'calibrated', but not in struct
is_ref_measured missing
> + * @poll_eoc -
> + * @lock - ADC lock for access to the peripheral.
> + * @complete - ADC res notification after interrupt is received.
> + * @graph -
> + */
> +struct vadc_chip {
> + struct regmap *regmap;
> + struct device *dev;
> + u16 base;
> + int nchannels;
unsigned nchannels
> + struct vadc_channel *channels;
> + int sysfs_channel;
> + bool is_ref_measured;
> + bool poll_eoc;
> + struct mutex lock;
> + struct completion complete;
> + struct vadc_linear_graph graph[2];
> +};
> +
> +static const struct vadc_prescaling vadc_prescale[] = {
> + {1, 1},
> + {1, 3},
> + {1, 4},
> + {1, 6},
> + {1, 20},
> + {1, 8},
> + {10, 81},
> + {1, 10}
> +};
> +
> +static int vadc_read(struct vadc_chip *vadc, u16 offset, u8 *data)
> +{
> + unsigned int val;
same this temp. var and the copy with regmap_read_raw()
> + int rc;
> +
> + rc = regmap_read(vadc->regmap, vadc->base + offset, &val);
> + if (rc < 0)
> + return rc;
> +
> + *data = val;
> +
> + return 0;
> +}
> +
> +static int vadc_write(struct vadc_chip *vadc, u16 offset, u8 data)
> +{
> + return regmap_write(vadc->regmap, vadc->base + offset, data);
> +}
> +
> +static int vadc_reset(struct vadc_chip *vadc)
> +{
> + u8 data;
> + int rc;
> +
> + rc = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);
> + if (rc < 0)
> + return rc;
> +
> + rc = vadc_read(vadc, VADC_PERH_RESET_CTL3, &data);
> + if (rc < 0)
> + return rc;
> +
> + rc = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);
> + if (rc < 0)
> + return rc;
> +
> + data |= VADC_FOLLOW_WARM_RB;
> +
> + return vadc_write(vadc, VADC_PERH_RESET_CTL3, data);
> +}
> +
> +static int vadc_enable(struct vadc_chip *vadc, bool state)
> +{
> + u8 data = 0;
> +
> + if (state)
> + data = VADC_EN_CTL1_SET;
> +
> + return vadc_write(vadc, VADC_EN_CTL1, data);
> +}
> +
> +static void vadc_status_show(struct vadc_chip *vadc)
> +{
> + u8 mode, sta1, chan, dig, en, req;
> + int rc;
> +
> + rc = vadc_read(vadc, VADC_MODE_CTL, &mode);
> + if (rc < 0)
> + return;
> +
> + rc = vadc_read(vadc, VADC_ADC_DIG_PARAM, &dig);
> + if (rc < 0)
> + return;
> +
> + rc = vadc_read(vadc, VADC_ADC_CH_SEL_CTL, &chan);
> + if (rc < 0)
> + return;
> +
> + rc = vadc_read(vadc, VADC_CONV_REQ, &req);
> + if (rc < 0)
> + return;
> +
> + rc = vadc_read(vadc, VADC_STATUS1, &sta1);
> + if (rc < 0)
> + return;
> +
> + rc = vadc_read(vadc, VADC_EN_CTL1, &en);
> + if (rc < 0)
> + return;
> +
> + dev_dbg(vadc->dev,
> + "mode:%02x en:%02x chan:%02x dig:%02x req:%02x sta1:%02x\n",
> + mode, en, chan, dig, req, sta1);
> +}
> +
> +static int vadc_configure(struct vadc_chip *vadc, struct vadc_channel *vchan)
> +{
> + u8 decim, mode_ctrl;
> + int rc;
> +
> + /* Mode selection */
> + mode_ctrl = (VADC_OP_MODE_NORMAL << VADC_OP_MODE_SHIFT) |
> + VADC_ADC_TRIM_EN | VADC_AMUX_TRIM_EN;
> + rc = vadc_write(vadc, VADC_MODE_CTL, mode_ctrl);
> + if (rc < 0)
> + return rc;
> +
> + /* Channel selection */
> + rc = vadc_write(vadc, VADC_ADC_CH_SEL_CTL, vchan->number);
> + if (rc < 0)
> + return rc;
> +
> + /* Digital parameter setup */
> + decim = vchan->decimation << VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT;
> + rc = vadc_write(vadc, VADC_ADC_DIG_PARAM, decim);
> + if (rc < 0)
> + return rc;
> +
> + /* HW settle time delay */
> + rc = vadc_write(vadc, VADC_HW_SETTLE_DELAY, vchan->hw_settle_time);
> + if (rc < 0)
> + return rc;
> +
> + rc = vadc_write(vadc, VADC_FAST_AVG_CTL, vchan->avg_samples);
> + if (rc < 0)
> + return rc;
> +
> + if (vchan->avg_samples)
> + rc = vadc_write(vadc, VADC_FAST_AVG_EN, VADC_FAST_AVG_EN_SET);
> + else
> + rc = vadc_write(vadc, VADC_FAST_AVG_EN, 0);
> +
> + if (rc < 0)
> + return rc;
> +
> + if (!vadc->poll_eoc)
> + reinit_completion(&vadc->complete);
> +
> + rc = vadc_enable(vadc, true);
> + if (rc < 0)
> + return rc;
> +
> + /* Request conversion */
> + return vadc_write(vadc, VADC_CONV_REQ, VADC_CONV_REQ_SET);
> +}
> +
> +static int vadc_poll_wait_eoc(struct vadc_chip *vadc, int interval_us)
> +{
> + int rc, count, retry;
count, retry could be unsigned
> + u8 sta1;
> +
> + retry = interval_us / VADC_CONV_TIME_MIN_US;
> +
> + for (count = 0; count < retry; count++) {
> + rc = vadc_read(vadc, VADC_STATUS1, &sta1);
> + if (rc < 0)
> + return rc;
> +
> + sta1 &= VADC_STATUS1_REQ_STS_EOC_MASK;
> + if (sta1 == VADC_STATUS1_EOC)
> + return 0;
> +
> + usleep_range(VADC_CONV_TIME_MIN_US, VADC_CONV_TIME_MAX_US);
> + }
> +
> + vadc_status_show(vadc);
> +
> + return -ETIMEDOUT;
> +}
> +
> +static int vadc_read_result(struct vadc_chip *vadc, s32 *data)
> +{
> + u8 lsb, msb;
> + int rc;
> +
> + rc = vadc_read(vadc, VADC_DATA0, &lsb);
> + if (rc < 0)
> + return rc;
> +
> + rc = vadc_read(vadc, VADC_DATA1, &msb);
> + if (rc < 0)
> + return rc;
> +
> + *data = ((unsigned)msb << 8) | lsb;
*data will never be negative, hence u32?
would be nice if *data is written only once
> +
> + *data = clamp_t(s32, *data, VADC_MIN_ADC_CODE, VADC_MAX_ADC_CODE);
> +
> + return 0;
> +}
> +
> +static struct vadc_channel *vadc_find_channel(struct vadc_chip *vadc, int num)
> +{
> + int i;
unsigned
> +
> + for (i = 0; i < vadc->nchannels; i++)
> + if (vadc->channels[i].number == num)
> + return &vadc->channels[num];
> +
> + dev_dbg(vadc->dev, "no such channel %02x\n", num);
> +
> + return NULL;
> +}
> +
> +static int vadc_do_conversion(struct vadc_chip *vadc,
> + struct vadc_channel *vchan, s32 *data)
> +{
> + int wait, rc;
> +
> + rc = vadc_configure(vadc, vchan);
> + if (rc < 0)
> + goto exit;
> +
> + wait = BIT(vchan->avg_samples) * VADC_CONV_TIME_MIN_US * 2;
> +
> + if (vadc->poll_eoc) {
> + rc = vadc_poll_wait_eoc(vadc, wait);
> + } else {
> + rc = wait_for_completion_timeout(&vadc->complete, wait);
> + if (!rc)
> + return -ETIMEDOUT;
> +
> + /* double check convertion status */
conversion
> + rc = vadc_poll_wait_eoc(vadc, VADC_CONV_TIME_MIN_US);
result is ignored
> + }
> +
> + rc = vadc_read_result(vadc, data);
result ignored
> +exit:
> + vadc_enable(vadc, false);
> + if (rc < 0)
> + dev_err(vadc->dev, "conversion failed\n");
> +
> + return rc;
> +}
> +
> +static int vadc_measure_reference_points(struct vadc_chip *vadc)
> +{
> + struct vadc_channel *vchan;
> + int rc = -EINVAL, read_1, read_2;
> +
> + vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE_UV;
> + vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV;
> +
> + vchan = vadc_find_channel(vadc, VADC_REF_1250MV);
> + if (!vchan)
> + goto exit;
> +
> + rc = vadc_do_conversion(vadc, vchan, &read_1);
> + if (rc < 0)
> + goto exit;
> +
> + /* Try with buffered 625mV channel first */
> + vchan = vadc_find_channel(vadc, VADC_SPARE1);
> + if (!vchan) {
> + vchan = vadc_find_channel(vadc, VADC_REF_625MV);
> + if (!vchan) {
> + rc = -EINVAL;
> + goto exit;
> + }
> + }
> +
> + rc = vadc_do_conversion(vadc, vchan, &read_2);
> + if (rc < 0)
> + goto exit;
> +
> + if (read_1 == read_2) {
> + rc = -EINVAL;
> + goto exit;
> + }
> +
> + vadc->graph[VADC_CALIB_ABSOLUTE].dy = read_1 - read_2;
> + vadc->graph[VADC_CALIB_ABSOLUTE].vref = read_1;
> + vadc->graph[VADC_CALIB_ABSOLUTE].gnd = read_2;
> +
> + /* Ratiometric calibration */
> + vchan = vadc_find_channel(vadc, VADC_VDD_VADC);
> + if (!vchan) {
> + rc = -EINVAL;
> + goto exit;
> + }
> +
> + rc = vadc_do_conversion(vadc, vchan, &read_1);
> + if (rc < 0)
> + goto exit;
> +
> + vchan = vadc_find_channel(vadc, VADC_GND_REF);
> + if (!vchan) {
> + rc = -EINVAL;
> + goto exit;
> + }
> +
> + rc = vadc_do_conversion(vadc, vchan, &read_2);
> + if (rc < 0)
> + goto exit;
> +
> + if (read_1 == read_2) {
> + rc = -EINVAL;
> + goto exit;
> + }
> +
> + vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2;
> + vadc->graph[VADC_CALIB_RATIOMETRIC].vref = read_1;
> + vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2;
> +exit:
> + if (rc < 0)
> + dev_err(vadc->dev, "measure reference points failed\n");
> +
> + return rc;
> +}
> +
> +static void vadc_calibrate(struct vadc_chip *vadc,
> + const struct vadc_channel *vchan,
> + struct vadc_result *res)
> +{
> + const struct vadc_prescaling *prescale;
> + bool negative = false;
> + s64 voltage;
> +
> + voltage = res->adc_code - vadc->graph[vchan->calibration].gnd;
> + voltage *= vadc->graph[vchan->calibration].dx;
> +
> + if (voltage < 0) {
> + negative = true;
> + voltage = -voltage;
> + }
> +
> + do_div(voltage, vadc->graph[vchan->calibration].dy);
> + if (negative)
> + voltage = -voltage;
> +
> + if (vchan->calibration == VADC_CALIB_ABSOLUTE)
> + voltage += vadc->graph[vchan->calibration].dx;
> +
> + if (voltage < 0)
> + voltage = 0;
> +
> + prescale = &vadc_prescale[vchan->prescaling];
> +
> + res->measurement = voltage * prescale->den;
> +
> + do_div(res->measurement, prescale->num);
> +
> + res->physical = res->measurement;
> +}
> +
> +static inline unsigned vadc_decimation_from_user(unsigned int value)
> +{
> + if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN ||
> + value > VADC_DECIMATION_MAX)
> + return -EINVAL;
> +
> + return __ffs64(value / VADC_DECIMATION_MIN);
> +}
> +
> +static inline unsigned vadc_decimation_to_user(unsigned value)
> +{
> + return (1 << value) * VADC_DECIMATION_MIN;
> +}
> +
> +static inline int
> +vadc_prescaling_from_user(unsigned int value, unsigned int value2)
> +{
> + int pre;
> +
> + for (pre = 0; pre < ARRAY_SIZE(vadc_prescale); pre++)
> + if (vadc_prescale[pre].num == value &&
> + vadc_prescale[pre].den == value2)
> + break;
> +
> + if (pre == ARRAY_SIZE(vadc_prescale))
> + return -EINVAL;
> +
> + return pre;
> +}
> +
> +static inline int vadc_hw_settle_time_from_user(unsigned int value)
> +{
> + if ((value <= 1000 && value % 100) || (value > 1000 && value % 2000))
> + return -EINVAL;
> +
> + if (value <= 1000)
> + value /= 100;
> + else
> + value = value / 2000 + 10;
> +
> + return value;
> +}
> +
> +static inline unsigned vadc_hw_settle_time_to_user(unsigned value)
> +{
> + if (value <= 10)
> + value *= 100;
> + else
> + value = (value - 10) * 2000;
> +
> + return value;
> +}
> +
> +static inline int vadc_avg_samples_from_user(unsigned int value)
> +{
> + if (!is_power_of_2(value) || value > VADC_AVG_SAMPLES_MAX)
> + return -EINVAL;
> +
> + return __ffs64(value);
> +}
> +
> +static inline unsigned vadc_avg_samples_to_user(unsigned value)
> +{
> + return 1 << value;
> +}
> +
> +static ssize_t vadc_show_channel(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> +
> + return sprintf(buf, "%d\n", vadc->sysfs_channel);
> +}
> +
> +static ssize_t vadc_store_channel(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + unsigned number;
> + int rc;
> +
> + rc = kstrtouint(buf, 10, &number);
> + if (rc)
> + return rc;
> +
> + if (!vadc_find_channel(vadc, number))
> + return -EINVAL;
> +
> + mutex_lock(&vadc->lock);
> + vadc->sysfs_channel = number;
> + mutex_unlock(&vadc->lock);
> +
> + return rc < 0 ? rc : len;
> +}
> +
> +static ssize_t vadc_show_calibration(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + const char *type;
> +
> + type = vchan->calibration ? "ratiometric" : "absolute";
> +
> + return sprintf(buf, "%s\n", type);
> +}
> +
> +static ssize_t vadc_store_calibration(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + bool calibration;
> +
> + if (!strncmp(buf, "ratiometric", sizeof("ratiometric")))
> + calibration = VADC_CALIB_RATIOMETRIC;
> + else if (!strncmp(buf, "absolute", sizeof("absolute")))
> + calibration = VADC_CALIB_ABSOLUTE;
> + else
> + return -EINVAL;
> +
> + mutex_lock(&vadc->lock);
> + vchan->calibration = calibration;
> + mutex_unlock(&vadc->lock);
> +
> + return len;
> +}
> +
> +static ssize_t vadc_show_decimation(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned decim;
> +
> + decim = vadc_decimation_to_user(vchan->decimation);
> +
> + return sprintf(buf, "%d\n", decim);
> +}
> +
> +static ssize_t vadc_store_decimation(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned int user;
> + int rc, decimation;
> +
> + rc = kstrtouint(buf, 10, &user);
> + if (rc)
> + return rc;
> +
> + decimation = vadc_decimation_from_user(user);
> + if (decimation < 0)
> + return decimation;
> +
> + mutex_lock(&vadc->lock);
> + vchan->decimation = decimation;
> + mutex_unlock(&vadc->lock);
> +
> + return len;
> +}
> +
> +static ssize_t vadc_show_prescaling(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + int num, den;
> +
> + num = vadc_prescale[vchan->prescaling].num;
> + den = vadc_prescale[vchan->prescaling].den;
> +
> + return sprintf(buf, "%d %d\n", num, den);
> +}
> +
> +static ssize_t vadc_store_prescaling(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned prescaling;
> + int rc;
> +
> + rc = kstrtouint(buf, 10, &prescaling);
> + if (rc)
> + return rc;
> +
> + if (prescaling >= ARRAY_SIZE(vadc_prescale))
> + return -EINVAL;
> +
> + mutex_lock(&vadc->lock);
> + vchan->prescaling = prescaling;
> + mutex_unlock(&vadc->lock);
> +
> + return len;
> +}
> +
> +static ssize_t vadc_show_hw_settle_time(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned time;
> +
> + time = vchan->hw_settle_time;
> +
> + return sprintf(buf, "%d\n", vadc_hw_settle_time_to_user(time));
> +}
> +
> +static ssize_t vadc_store_hw_settle_time(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned int user;
> + int rc, time;
> +
> + rc = kstrtouint(buf, 10, &user);
> + if (rc)
> + return rc;
> +
> + time = vadc_hw_settle_time_from_user(user);
> + if (time < 0)
> + return time;
> +
> + mutex_lock(&vadc->lock);
> + vchan->hw_settle_time = time;
> + mutex_unlock(&vadc->lock);
> +
> + return len;
> +}
> +
> +static ssize_t vadc_show_avg_samples(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned avg;
> +
> + avg = vadc_avg_samples_to_user(vchan->avg_samples);
> +
> + return sprintf(buf, "%d\n", avg);
> +}
> +
> +static ssize_t vadc_store_avg_samples(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct vadc_chip *vadc = iio_priv(dev_to_iio_dev(dev));
> + struct vadc_channel *vchan = &vadc->channels[vadc->sysfs_channel];
> + unsigned int user;
> + int rc, avg;
> +
> + rc = kstrtouint(buf, 10, &user);
> + if (rc)
> + return rc;
> +
> + avg = vadc_avg_samples_from_user(user);
> + if (avg < 0)
> + return avg;
> +
> + mutex_lock(&vadc->lock);
> + vchan->avg_samples = avg;
> + mutex_unlock(&vadc->lock);
> +
> + return len;
> +}
> +
> +static IIO_DEVICE_ATTR(channel, S_IRUGO | S_IWUSR,
> + vadc_show_channel, vadc_store_channel, 0);
> +static IIO_DEVICE_ATTR(calibration, S_IRUGO | S_IWUSR,
> + vadc_show_calibration, vadc_store_calibration, 0);
> +static IIO_DEVICE_ATTR(decimation, S_IRUGO | S_IWUSR,
> + vadc_show_decimation, vadc_store_decimation, 0);
> +static IIO_DEVICE_ATTR(pre_scaling, S_IRUGO | S_IWUSR,
> + vadc_show_prescaling, vadc_store_prescaling, 0);
> +static IIO_DEVICE_ATTR(hw_settle_time, S_IRUGO | S_IWUSR,
> + vadc_show_hw_settle_time, vadc_store_hw_settle_time, 0);
> +static IIO_DEVICE_ATTR(avg_samples, S_IRUGO | S_IWUSR,
> + vadc_show_avg_samples, vadc_store_avg_samples, 0);
> +
> +static struct attribute *vadc_attributes[] = {
> + &iio_dev_attr_channel.dev_attr.attr,
> + &iio_dev_attr_calibration.dev_attr.attr,
> + &iio_dev_attr_decimation.dev_attr.attr,
> + &iio_dev_attr_pre_scaling.dev_attr.attr,
> + &iio_dev_attr_hw_settle_time.dev_attr.attr,
> + &iio_dev_attr_avg_samples.dev_attr.attr,
> + NULL,
> +};
> +
> +static const struct attribute_group vadc_attribute_group = {
> + .attrs = vadc_attributes,
> +};
> +
> +static int vadc_read_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int *val, int *val2, long mask)
> +{
> + struct vadc_chip *vadc = iio_priv(indio_dev);
> + struct vadc_channel *vchan;
> + struct vadc_result result;
> + int rc = -EINVAL;
> +
> + mutex_lock(&vadc->lock);
> +
> + vchan = vadc_find_channel(vadc, chan->channel);
> + if (!vchan)
> + goto exit;
> +
> + if (!vadc->is_ref_measured) {
> + rc = vadc_measure_reference_points(vadc);
> + if (rc < 0)
> + goto exit;
> +
> + vadc->is_ref_measured = true;
> + }
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_PROCESSED:
> + rc = vadc_do_conversion(vadc, vchan, &result.adc_code);
> + if (rc < 0)
> + goto exit;
> +
> + vadc_calibrate(vadc, vchan, &result);
> +
> + *val = result.physical;
> + rc = IIO_VAL_INT;
> + break;
> + default:
> + break;
> + }
> +
> +exit:
> + mutex_unlock(&vadc->lock);
> +
> + return rc;
> +}
> +
> +static const struct iio_info vadc_info = {
> + .read_raw = vadc_read_raw,
> + .attrs = &vadc_attribute_group,
> + .driver_module = THIS_MODULE,
> +};
> +
> +#define VADC_CHAN(_id, _pre) \
> + [VADC_##_id] = { \
> + .type = IIO_VOLTAGE, \
> + .indexed = 1, \
> + .channel = VADC_##_id, \
> + .address = _pre, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
> + .datasheet_name = __stringify(VADC_##_id), \
> + .scan_type = { \
> + .sign = 's', \
> + .realbits = 15, \
> + .storagebits = 16, \
> + }, \
> + },
> +
> +static const struct iio_chan_spec vadc_channels[] = {
> + VADC_CHAN(USBIN, 4) /* 0x00 */
> + VADC_CHAN(DCIN, 4)
> + VADC_CHAN(VCHG_SNS, 3)
> + VADC_CHAN(SPARE1_03, 1)
> + VADC_CHAN(USB_ID_MV, 1)
> + VADC_CHAN(VCOIN, 1)
> + VADC_CHAN(VBAT_SNS, 1)
> + VADC_CHAN(VSYS, 1)
> + VADC_CHAN(DIE_TEMP, 0)
> + VADC_CHAN(REF_625MV, 0)
> + VADC_CHAN(REF_1250MV, 0)
> + VADC_CHAN(CHG_TEMP, 0)
> + VADC_CHAN(SPARE1, 0)
> + VADC_CHAN(SPARE2, 0)
> + VADC_CHAN(GND_REF, 0)
> + VADC_CHAN(VDD_VADC, 0) /* 0x0f */
> +
> + VADC_CHAN(P_MUX1_1_1, 0) /* 0x10 */
> + VADC_CHAN(P_MUX2_1_1, 0)
> + VADC_CHAN(P_MUX3_1_1, 0)
> + VADC_CHAN(P_MUX4_1_1, 0)
> + VADC_CHAN(P_MUX5_1_1, 0)
> + VADC_CHAN(P_MUX6_1_1, 0)
> + VADC_CHAN(P_MUX7_1_1, 0)
> + VADC_CHAN(P_MUX8_1_1, 0)
> + VADC_CHAN(P_MUX9_1_1, 0)
> + VADC_CHAN(P_MUX10_1_1, 0)
> + VADC_CHAN(P_MUX11_1_1, 0)
> + VADC_CHAN(P_MUX12_1_1, 0)
> + VADC_CHAN(P_MUX13_1_1, 0)
> + VADC_CHAN(P_MUX14_1_1, 0)
> + VADC_CHAN(P_MUX15_1_1, 0)
> + VADC_CHAN(P_MUX16_1_1, 0) /* 0x1f */
> +
> + VADC_CHAN(P_MUX1_1_3, 1) /* 0x20 */
> + VADC_CHAN(P_MUX2_1_3, 1)
> + VADC_CHAN(P_MUX3_1_3, 1)
> + VADC_CHAN(P_MUX4_1_3, 1)
> + VADC_CHAN(P_MUX5_1_3, 1)
> + VADC_CHAN(P_MUX6_1_3, 1)
> + VADC_CHAN(P_MUX7_1_3, 1)
> + VADC_CHAN(P_MUX8_1_3, 1)
> + VADC_CHAN(P_MUX9_1_3, 1)
> + VADC_CHAN(P_MUX10_1_3, 1)
> + VADC_CHAN(P_MUX11_1_3, 1)
> + VADC_CHAN(P_MUX12_1_3, 1)
> + VADC_CHAN(P_MUX13_1_3, 1)
> + VADC_CHAN(P_MUX14_1_3, 1)
> + VADC_CHAN(P_MUX15_1_3, 1)
> + VADC_CHAN(P_MUX16_1_3, 1) /* 0x2f */
> +
> + VADC_CHAN(LR_MUX1_BAT_THERM, 0) /* 0x30 */
> + VADC_CHAN(LR_MUX2_BAT_ID, 0)
> + VADC_CHAN(LR_MUX3_XO_THERM, 0)
> + VADC_CHAN(LR_MUX4_AMUX_THM1, 0)
> + VADC_CHAN(LR_MUX5_AMUX_THM2, 0)
> + VADC_CHAN(LR_MUX6_AMUX_THM3, 0)
> + VADC_CHAN(LR_MUX7_HW_ID, 0)
> + VADC_CHAN(LR_MUX8_AMUX_THM4, 0)
> + VADC_CHAN(LR_MUX9_AMUX_THM5, 0)
> + VADC_CHAN(AMUX_PU1, 0)
> + VADC_CHAN(AMUX_PU2, 0)
> + VADC_CHAN(LR_MUX3_BUF_XO_THERM_BUF, 0) /* 0x3c */
> +
> + VADC_CHAN(LR_MUX1_PU1_BAT_THERM, 0) /* 0x70 */
> + VADC_CHAN(LR_MUX2_PU1_BAT_ID, 0)
> + VADC_CHAN(LR_MUX3_PU1_XO_THERM, 0)
> + VADC_CHAN(LR_MUX4_PU1_AMUX_THM1, 0)
> + VADC_CHAN(LR_MUX5_PU1_AMUX_THM2, 0)
> + VADC_CHAN(LR_MUX6_PU1_AMUX_THM3, 0)
> + VADC_CHAN(LR_MUX7_PU1_AMUX_HW_ID, 0)
> + VADC_CHAN(LR_MUX8_PU1_AMUX_THM4, 0)
> + VADC_CHAN(LR_MUX9_PU1_AMUX_THM5, 0)
> + VADC_CHAN(LR_MUX10_PU1_AMUX_USB_ID, 0) /* 0x79 */
> + VADC_CHAN(LR_MUX3_BUF_PU1_XO_THERM_BUF, 0) /* 0x7c */
> +
> + VADC_CHAN(LR_MUX1_PU2_BAT_THERM, 0) /* 0xb0 */
> + VADC_CHAN(LR_MUX2_PU2_BAT_ID, 0)
> + VADC_CHAN(LR_MUX3_PU2_XO_THERM, 0)
> + VADC_CHAN(LR_MUX4_PU2_AMUX_THM1, 0)
> + VADC_CHAN(LR_MUX5_PU2_AMUX_THM2, 0)
> + VADC_CHAN(LR_MUX6_PU2_AMUX_THM3, 0)
> + VADC_CHAN(LR_MUX7_PU2_AMUX_HW_ID, 0)
> + VADC_CHAN(LR_MUX8_PU2_AMUX_THM4, 0)
> + VADC_CHAN(LR_MUX9_PU2_AMUX_THM5, 0)
> + VADC_CHAN(LR_MUX10_PU2_AMUX_USB_ID, 0) /* 0xb9 */
> + VADC_CHAN(LR_MUX3_BUF_PU2_XO_THERM_BUF, 0) /* 0xbc */
> +
> + VADC_CHAN(LR_MUX1_PU1_PU2_BAT_THERM, 0) /* 0xf0 */
> + VADC_CHAN(LR_MUX2_PU1_PU2_BAT_ID, 0)
> + VADC_CHAN(LR_MUX3_PU1_PU2_XO_THERM, 0)
> + VADC_CHAN(LR_MUX4_PU1_PU2_AMUX_THM1, 0)
> + VADC_CHAN(LR_MUX5_PU1_PU2_AMUX_THM2, 0)
> + VADC_CHAN(LR_MUX6_PU1_PU2_AMUX_THM3, 0)
> + VADC_CHAN(LR_MUX7_PU1_PU2_AMUX_HW_ID, 0)
> + VADC_CHAN(LR_MUX8_PU1_PU2_AMUX_THM4, 0)
> + VADC_CHAN(LR_MUX9_PU1_PU2_AMUX_THM5, 0)
> + VADC_CHAN(LR_MUX10_PU1_PU2_AMUX_USB_ID, 0) /* 0xf9 */
> + VADC_CHAN(LR_MUX3_BUF_PU1_PU2_XO_THERM_BU, 0) /* 0xfc */
> +};
> +
> +static int
> +vadc_get_dt_channel_data(struct vadc_chip *vadc, struct device_node *node)
> +{
> + struct vadc_channel *vchan;
> + u32 num, value, varr[2];
> + int rc, pre, time, avg, decim;
> + const char *name;
> +
> + name = of_get_property(node, "label", NULL) ? : node->name;
> +
> + rc = of_property_read_u32(node, "qcom,channel", &num);
> + if (rc) {
> + dev_err(vadc->dev, "invalid channel number %s\n", name);
> + return -EINVAL;
> + }
> +
> + if (num >= vadc->nchannels) {
> + dev_err(vadc->dev, "%s invalid channel number %d\n", name, num);
> + return -EINVAL;
> + }
> +
> + vchan = &vadc->channels[num];
> +
> + /* exist */
> + vchan->number = num;
> +
> + rc = of_property_read_u32(node, "qcom,decimation", &value);
> + if (!rc) {
> + decim = vadc_decimation_from_user(value);
> + if (decim < 0) {
> + dev_err(vadc->dev, "%02x invalid decimation %d\n",
> + num, value);
> + return -EINVAL;
> + }
> + vchan->decimation = decim;
> + }
> +
> + rc = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
> + if (!rc) {
> + pre = vadc_prescaling_from_user(varr[0], varr[1]);
> + if (pre < 0) {
> + dev_warn(vadc->dev,
> + "%02x invalid pre-scaling <%d %d>\n",
> + num, varr[0], varr[1]);
> + return -EINVAL;
> + }
> + vchan->prescaling = pre;
> + }
> +
> + rc = of_property_read_u32(node, "qcom,hw-settle-time", &value);
> + if (!rc) {
> + time = vadc_hw_settle_time_from_user(value);
> + if (time < 0) {
> + dev_warn(vadc->dev,
> + "%02x invalid hw-settle-time %d, us\n",
> + num, value);
> + return -EINVAL;
> + }
> + vchan->hw_settle_time = time;
> + }
> +
> + rc = of_property_read_u32(node, "qcom,avg-samples", &value);
> + if (!rc) {
> + avg = vadc_avg_samples_from_user(value);
> + if (avg < 0) {
> + dev_warn(vadc->dev, "%02x invalid avg-samples %d\n",
> + num, value);
> + return -EINVAL;
> + }
> + vchan->avg_samples = avg;
> + }
> +
> + if (of_property_read_bool(node, "qcom,ratiometric"))
> + vchan->calibration = VADC_CALIB_RATIOMETRIC;
> + else
> + vchan->calibration = VADC_CALIB_ABSOLUTE;
> +
> + dev_info(vadc->dev, "%02x name %s\n", num, name);
> +
> + return 0;
> +}
> +
> +static int vadc_get_dt_data(struct vadc_chip *vadc, struct device_node *node)
> +{
> + struct device_node *child;
> + int rc;
> +
> + vadc->poll_eoc = of_property_read_bool(node, "qcom,poll-eoc");
> +
> + for_each_available_child_of_node(node, child) {
> + rc = vadc_get_dt_channel_data(vadc, child);
> + if (rc < 0)
> + return rc;
> + }
> +
> + return 0;
> +}
> +
> +static irqreturn_t vadc_isr(int irq, void *dev_id)
> +{
> + struct vadc_chip *vadc = dev_id;
> +
> + complete(&vadc->complete);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int vadc_version_check(struct vadc_chip *vadc)
> +{
> + u8 revision, type, subtype;
> + int rc;
> +
> + rc = vadc_read(vadc, VADC_PERPH_TYPE, &type);
> + if (rc < 0)
> + return rc;
> +
> + if (type < VADC_PERPH_TYPE_ADC) {
> + dev_dbg(vadc->dev, "%d is not ADC\n", type);
> + return -EINVAL;
> + }
> +
> + rc = vadc_read(vadc, VADC_PERPH_SUBTYPE, &subtype);
> + if (rc < 0)
> + return rc;
> +
> + if (subtype < VADC_PERPH_SUBTYPE_VADC) {
> + dev_dbg(vadc->dev, "%d is not VADC\n", subtype);
> + return -EINVAL;
> + }
> +
> + rc = vadc_read(vadc, VADC_REVISION2, &revision);
> + if (rc < 0)
> + return rc;
> +
> + if (revision < VADC_REVISION2_SUPPORTED_VADC) {
> + dev_dbg(vadc->dev, "revision %d not supported\n", revision);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int vadc_probe(struct platform_device *pdev)
> +{
> + struct device_node *node = pdev->dev.of_node;
> + struct device *dev = &pdev->dev;
> + struct iio_dev *indio_dev;
> + struct vadc_channel *vchan;
> + struct vadc_chip *vadc;
> + struct resource *res;
> + struct regmap *regmap;
> + int rc, irq_eoc, n;
> +
> + regmap = dev_get_regmap(dev->parent, NULL);
> + if (!regmap)
> + return -ENODEV;
> +
> + indio_dev = devm_iio_device_alloc(dev, sizeof(*vadc));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + vadc = iio_priv(indio_dev);
> + vadc->dev = dev;
> + vadc->regmap = regmap;
> + vadc->is_ref_measured = false;
> + init_completion(&vadc->complete);
> + mutex_init(&vadc->lock);
> +
> + vadc->nchannels = ARRAY_SIZE(vadc_channels);
> + vadc->channels = devm_kcalloc(dev, sizeof(*vadc->channels),
> + vadc->nchannels, GFP_KERNEL);
> + if (!vadc->channels)
> + return -ENOMEM;
> +
> + for (n = 0; n < vadc->nchannels; n++) {
> + vchan = &vadc->channels[n];
> + /* set default channel properties */
> + vchan->name = (char *)vadc_channels[n].datasheet_name;
> + vchan->number = -1; /* inactive */
> + vchan->prescaling = vadc_channels[n].address;
> + vchan->decimation = VADC_DEF_DECIMATION;
> + vchan->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
> + vchan->avg_samples = VADC_DEF_AVG_SAMPLES;
> + vchan->calibration = VADC_DEF_CALIB_TYPE;
> + }
> +
> + platform_set_drvdata(pdev, vadc);
> +
> + res = platform_get_resource(pdev, IORESOURCE_REG, 0);
> + if (!res)
> + return -ENODEV;
> +
> + vadc->base = res->start;
> +
> + rc = vadc_version_check(vadc);
> + if (rc < 0)
> + return -ENODEV;
> +
> + irq_eoc = platform_get_irq(pdev, 0);
> + if (irq_eoc < 0)
> + return -ENODEV;
> +
> + rc = vadc_get_dt_data(vadc, node);
> + if (rc < 0)
> + return rc;
> +
> + rc = vadc_reset(vadc);
> + if (rc < 0) {
> + dev_dbg(dev, "reset failed\n");
> + return rc;
> + }
> +
> + if (!vadc->poll_eoc) {
> + rc = devm_request_irq(dev, irq_eoc, vadc_isr, 0,
> + "spmi-vadc", vadc);
> + if (!rc)
> + enable_irq_wake(irq_eoc);
> + else
> + return rc;
> + } else {
> + device_init_wakeup(vadc->dev, 1);
> + }
> +
> + indio_dev->dev.parent = dev;
> + indio_dev->dev.of_node = node;
> + indio_dev->name = pdev->name;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->info = &vadc_info;
> + indio_dev->channels = vadc_channels;
> + indio_dev->num_channels = ARRAY_SIZE(vadc_channels);
> +
> + return devm_iio_device_register(dev, indio_dev);
> +}
> +
> +static int vadc_remove(struct platform_device *pdev)
needed?
> +{
> + return 0;
> +}
> +
> +static const struct of_device_id vadc_match_table[] = {
> + { .compatible = "qcom,spmi-vadc" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, vadc_match_table);
> +
> +static struct platform_driver vadc_driver = {
> + .driver = {
> + .name = "spmi-vadc",
> + .of_match_table = vadc_match_table,
> + },
> + .probe = vadc_probe,
> + .remove = vadc_remove,
> +};
> +module_platform_driver(vadc_driver);
> +
> +MODULE_ALIAS("platform:spmi-vadc");
> +MODULE_DESCRIPTION("Qualcomm SPMI PMIC voltage ADC driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/dt-bindings/iio/qcom,spmi-pmic-vadc.h b/include/dt-bindings/iio/qcom,spmi-pmic-vadc.h
> new file mode 100644
> index 0000000..594e131
> --- /dev/null
> +++ b/include/dt-bindings/iio/qcom,spmi-pmic-vadc.h
> @@ -0,0 +1,119 @@
> +/*
> + * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _DT_BINDINGS_QCOM_PMIC_ADC_H
> +#define _DT_BINDINGS_QCOM_PMIC_ADC_H
> +
> +/* QPNP Voltage ADC channels */
> +#define VADC_USBIN 0x00
> +#define VADC_DCIN 0x01
> +#define VADC_VCHG_SNS 0x02
> +#define VADC_SPARE1_03 0x03
> +#define VADC_USB_ID_MV 0x04
> +#define VADC_VCOIN 0x05
> +#define VADC_VBAT_SNS 0x06
> +#define VADC_VSYS 0x07
> +#define VADC_DIE_TEMP 0x08
> +#define VADC_REF_625MV 0x09
> +#define VADC_REF_1250MV 0x0a
> +#define VADC_CHG_TEMP 0x0b
> +#define VADC_SPARE1 0x0c
> +#define VADC_SPARE2 0x0d
> +#define VADC_GND_REF 0x0e
> +#define VADC_VDD_VADC 0x0f
> +
> +#define VADC_P_MUX1_1_1 0x10
> +#define VADC_P_MUX2_1_1 0x11
> +#define VADC_P_MUX3_1_1 0x12
> +#define VADC_P_MUX4_1_1 0x13
> +#define VADC_P_MUX5_1_1 0x14
> +#define VADC_P_MUX6_1_1 0x15
> +#define VADC_P_MUX7_1_1 0x16
> +#define VADC_P_MUX8_1_1 0x17
> +#define VADC_P_MUX9_1_1 0x18
> +#define VADC_P_MUX10_1_1 0x19
> +#define VADC_P_MUX11_1_1 0x1a
> +#define VADC_P_MUX12_1_1 0x1b
> +#define VADC_P_MUX13_1_1 0x1c
> +#define VADC_P_MUX14_1_1 0x1d
> +#define VADC_P_MUX15_1_1 0x1e
> +#define VADC_P_MUX16_1_1 0x1f
> +
> +#define VADC_P_MUX1_1_3 0x20
> +#define VADC_P_MUX2_1_3 0x21
> +#define VADC_P_MUX3_1_3 0x22
> +#define VADC_P_MUX4_1_3 0x23
> +#define VADC_P_MUX5_1_3 0x24
> +#define VADC_P_MUX6_1_3 0x25
> +#define VADC_P_MUX7_1_3 0x26
> +#define VADC_P_MUX8_1_3 0x27
> +#define VADC_P_MUX9_1_3 0x28
> +#define VADC_P_MUX10_1_3 0x29
> +#define VADC_P_MUX11_1_3 0x2a
> +#define VADC_P_MUX12_1_3 0x2b
> +#define VADC_P_MUX13_1_3 0x2c
> +#define VADC_P_MUX14_1_3 0x2d
> +#define VADC_P_MUX15_1_3 0x2e
> +#define VADC_P_MUX16_1_3 0x2f
> +
> +#define VADC_LR_MUX1_BAT_THERM 0x30
> +#define VADC_LR_MUX2_BAT_ID 0x31
> +#define VADC_LR_MUX3_XO_THERM 0x32
> +#define VADC_LR_MUX4_AMUX_THM1 0x33
> +#define VADC_LR_MUX5_AMUX_THM2 0x34
> +#define VADC_LR_MUX6_AMUX_THM3 0x35
> +#define VADC_LR_MUX7_HW_ID 0x36
> +#define VADC_LR_MUX8_AMUX_THM4 0x37
> +#define VADC_LR_MUX9_AMUX_THM5 0x38
> +#define VADC_LR_MUX10_USB_ID 0x39
> +#define VADC_AMUX_PU1 0x3a
> +#define VADC_AMUX_PU2 0x3b
> +#define VADC_LR_MUX3_BUF_XO_THERM_BUF 0x3c
> +
> +#define VADC_LR_MUX1_PU1_BAT_THERM 0x70
> +#define VADC_LR_MUX2_PU1_BAT_ID 0x71
> +#define VADC_LR_MUX3_PU1_XO_THERM 0x72
> +#define VADC_LR_MUX4_PU1_AMUX_THM1 0x73
> +#define VADC_LR_MUX5_PU1_AMUX_THM2 0x74
> +#define VADC_LR_MUX6_PU1_AMUX_THM3 0x75
> +#define VADC_LR_MUX7_PU1_AMUX_HW_ID 0x76
> +#define VADC_LR_MUX8_PU1_AMUX_THM4 0x77
> +#define VADC_LR_MUX9_PU1_AMUX_THM5 0x78
> +#define VADC_LR_MUX10_PU1_AMUX_USB_ID 0x79
> +#define VADC_LR_MUX3_BUF_PU1_XO_THERM_BUF 0x7c
> +
> +#define VADC_LR_MUX1_PU2_BAT_THERM 0xb0
> +#define VADC_LR_MUX2_PU2_BAT_ID 0xb1
> +#define VADC_LR_MUX3_PU2_XO_THERM 0xb2
> +#define VADC_LR_MUX4_PU2_AMUX_THM1 0xb3
> +#define VADC_LR_MUX5_PU2_AMUX_THM2 0xb4
> +#define VADC_LR_MUX6_PU2_AMUX_THM3 0xb5
> +#define VADC_LR_MUX7_PU2_AMUX_HW_ID 0xb6
> +#define VADC_LR_MUX8_PU2_AMUX_THM4 0xb7
> +#define VADC_LR_MUX9_PU2_AMUX_THM5 0xb8
> +#define VADC_LR_MUX10_PU2_AMUX_USB_ID 0xb9
> +#define VADC_LR_MUX3_BUF_PU2_XO_THERM_BUF 0xbc
> +
> +#define VADC_LR_MUX1_PU1_PU2_BAT_THERM 0xf0
> +#define VADC_LR_MUX2_PU1_PU2_BAT_ID 0xf1
> +#define VADC_LR_MUX3_PU1_PU2_XO_THERM 0xf2
> +#define VADC_LR_MUX4_PU1_PU2_AMUX_THM1 0xf3
> +#define VADC_LR_MUX5_PU1_PU2_AMUX_THM2 0xf4
> +#define VADC_LR_MUX6_PU1_PU2_AMUX_THM3 0xf5
> +#define VADC_LR_MUX7_PU1_PU2_AMUX_HW_ID 0xf6
> +#define VADC_LR_MUX8_PU1_PU2_AMUX_THM4 0xf7
> +#define VADC_LR_MUX9_PU1_PU2_AMUX_THM5 0xf8
> +#define VADC_LR_MUX10_PU1_PU2_AMUX_USB_ID 0xf9
> +#define VADC_LR_MUX3_BUF_PU1_PU2_XO_THERM_BU 0xfc
> +
> +#endif /* _DT_BINDINGS_QCOM_PMIC_ADC_H */
>
--
Peter Meerwald
+43-664-2444418 (mobile)
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