// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved. */ #include <linux/bitops.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/iio/adc/qcom-vadc-common.h> #include <linux/iio/iio.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/log2.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/slab.h> #include <dt-bindings/iio/qcom,spmi-vadc.h> #define ADC5_USR_REVISION1 … #define ADC5_USR_STATUS1 … #define ADC5_USR_STATUS1_CONV_FAULT … #define ADC5_USR_STATUS1_REQ_STS … #define ADC5_USR_STATUS1_EOC … #define ADC5_USR_STATUS1_REQ_STS_EOC_MASK … #define ADC5_USR_STATUS2 … #define ADC5_USR_STATUS2_CONV_SEQ_MASK … #define ADC5_USR_STATUS2_CONV_SEQ_MASK_SHIFT … #define ADC5_USR_IBAT_MEAS … #define ADC5_USR_IBAT_MEAS_SUPPORTED … #define ADC5_USR_DIG_PARAM … #define ADC5_USR_DIG_PARAM_CAL_VAL … #define ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT … #define ADC5_USR_DIG_PARAM_CAL_SEL … #define ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT … #define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL … #define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT … #define ADC5_USR_FAST_AVG_CTL … #define ADC5_USR_FAST_AVG_CTL_EN … #define ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK … #define ADC5_USR_CH_SEL_CTL … #define ADC5_USR_DELAY_CTL … #define ADC5_USR_HW_SETTLE_DELAY_MASK … #define ADC5_USR_EN_CTL1 … #define ADC5_USR_EN_CTL1_ADC_EN … #define ADC5_USR_CONV_REQ … #define ADC5_USR_CONV_REQ_REQ … #define ADC5_USR_DATA0 … #define ADC5_USR_DATA1 … #define ADC5_USR_IBAT_DATA0 … #define ADC5_USR_IBAT_DATA1 … #define ADC_CHANNEL_OFFSET … #define ADC_CHANNEL_MASK … /* * Conversion time varies based on the decimation, clock rate, fast average * samples and measurements queued across different VADC peripherals. * Set the timeout to a max of 100ms. */ #define ADC5_CONV_TIME_MIN_US … #define ADC5_CONV_TIME_MAX_US … #define ADC5_CONV_TIME_RETRY … #define ADC5_CONV_TIMEOUT … /* Digital version >= 5.3 supports hw_settle_2 */ #define ADC5_HW_SETTLE_DIFF_MINOR … #define ADC5_HW_SETTLE_DIFF_MAJOR … /* For PMIC7 */ #define ADC_APP_SID … #define ADC_APP_SID_MASK … #define ADC7_CONV_TIMEOUT … enum adc5_cal_method { … }; enum adc5_cal_val { … }; /** * struct adc5_channel_prop - ADC channel property. * @channel: channel number, refer to the channel list. * @cal_method: calibration method. * @cal_val: calibration value * @decimation: sampling rate supported for the channel. * @sid: slave id of PMIC owning the channel, for PMIC7. * @prescale: 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. * @scale_fn_type: Represents the scaling function to convert voltage * physical units desired by the client for the channel. * @channel_name: Channel name used in device tree. */ struct adc5_channel_prop { … }; /** * struct adc5_chip - ADC private structure. * @regmap: SPMI ADC5 peripheral register map field. * @dev: SPMI ADC5 device. * @base: base address for the ADC peripheral. * @nchannels: number of ADC channels. * @chan_props: array of ADC channel properties. * @iio_chans: array of IIO channels specification. * @poll_eoc: use polling instead of interrupt. * @complete: ADC result notification after interrupt is received. * @lock: ADC lock for access to the peripheral. * @data: software configuration data. */ struct adc5_chip { … }; static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len) { … } static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len) { … } static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val) { … } static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data) { … } static int adc5_poll_wait_eoc(struct adc5_chip *adc) { … } static void adc5_update_dig_param(struct adc5_chip *adc, struct adc5_channel_prop *prop, u8 *data) { … } static int adc5_configure(struct adc5_chip *adc, struct adc5_channel_prop *prop) { … } static int adc7_configure(struct adc5_chip *adc, struct adc5_channel_prop *prop) { … } static int adc5_do_conversion(struct adc5_chip *adc, struct adc5_channel_prop *prop, struct iio_chan_spec const *chan, u16 *data_volt, u16 *data_cur) { … } static int adc7_do_conversion(struct adc5_chip *adc, struct adc5_channel_prop *prop, struct iio_chan_spec const *chan, u16 *data_volt, u16 *data_cur) { … } adc_do_conversion; static irqreturn_t adc5_isr(int irq, void *dev_id) { … } static int adc5_fwnode_xlate(struct iio_dev *indio_dev, const struct fwnode_reference_args *iiospec) { … } static int adc7_fwnode_xlate(struct iio_dev *indio_dev, const struct fwnode_reference_args *iiospec) { … } static int adc_read_raw_common(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask, adc_do_conversion do_conv) { … } static int adc5_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int adc7_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static const struct iio_info adc5_info = …; static const struct iio_info adc7_info = …; struct adc5_channels { … }; /* In these definitions, _pre refers to an index into adc5_prescale_ratios. */ #define ADC5_CHAN(_dname, _type, _mask, _pre, _scale) … \ #define ADC5_CHAN_TEMP(_dname, _pre, _scale) … \ #define ADC5_CHAN_VOLT(_dname, _pre, _scale) … \ static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = …; static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = …; static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = …; static int adc5_get_fw_channel_data(struct adc5_chip *adc, struct adc5_channel_prop *prop, struct fwnode_handle *fwnode, const struct adc5_data *data) { … } static const struct adc5_data adc5_data_pmic = …; static const struct adc5_data adc7_data_pmic = …; static const struct adc5_data adc5_data_pmic_rev2 = …; static const struct of_device_id adc5_match_table[] = …; MODULE_DEVICE_TABLE(of, adc5_match_table); static int adc5_get_fw_data(struct adc5_chip *adc) { … } static int adc5_probe(struct platform_device *pdev) { … } static struct platform_driver adc5_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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