// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Spreadtrum Communications Inc. #include <linux/hwspinlock.h> #include <linux/iio/iio.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/nvmem-consumer.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> /* PMIC global registers definition */ #define SC2730_MODULE_EN … #define SC2731_MODULE_EN … #define SC27XX_MODULE_ADC_EN … #define SC2721_ARM_CLK_EN … #define SC2730_ARM_CLK_EN … #define SC2731_ARM_CLK_EN … #define SC27XX_CLK_ADC_EN … #define SC27XX_CLK_ADC_CLK_EN … /* ADC controller registers definition */ #define SC27XX_ADC_CTL … #define SC27XX_ADC_CH_CFG … #define SC27XX_ADC_DATA … #define SC27XX_ADC_INT_EN … #define SC27XX_ADC_INT_CLR … #define SC27XX_ADC_INT_STS … #define SC27XX_ADC_INT_RAW … /* Bits and mask definition for SC27XX_ADC_CTL register */ #define SC27XX_ADC_EN … #define SC27XX_ADC_CHN_RUN … #define SC27XX_ADC_12BIT_MODE … #define SC27XX_ADC_RUN_NUM_MASK … #define SC27XX_ADC_RUN_NUM_SHIFT … /* Bits and mask definition for SC27XX_ADC_CH_CFG register */ #define SC27XX_ADC_CHN_ID_MASK … #define SC27XX_ADC_SCALE_MASK … #define SC2721_ADC_SCALE_MASK … #define SC27XX_ADC_SCALE_SHIFT … #define SC2721_ADC_SCALE_SHIFT … /* Bits definitions for SC27XX_ADC_INT_EN registers */ #define SC27XX_ADC_IRQ_EN … /* Bits definitions for SC27XX_ADC_INT_CLR registers */ #define SC27XX_ADC_IRQ_CLR … /* Bits definitions for SC27XX_ADC_INT_RAW registers */ #define SC27XX_ADC_IRQ_RAW … /* Mask definition for SC27XX_ADC_DATA register */ #define SC27XX_ADC_DATA_MASK … /* Timeout (ms) for the trylock of hardware spinlocks */ #define SC27XX_ADC_HWLOCK_TIMEOUT … /* Timeout (us) for ADC data conversion according to ADC datasheet */ #define SC27XX_ADC_RDY_TIMEOUT … #define SC27XX_ADC_POLL_RAW_STATUS … /* Maximum ADC channel number */ #define SC27XX_ADC_CHANNEL_MAX … /* ADC voltage ratio definition */ #define SC27XX_VOLT_RATIO(n, d) … #define SC27XX_RATIO_NUMERATOR_OFFSET … #define SC27XX_RATIO_DENOMINATOR_MASK … /* ADC specific channel reference voltage 3.5V */ #define SC27XX_ADC_REFVOL_VDD35 … /* ADC default channel reference voltage is 2.8V */ #define SC27XX_ADC_REFVOL_VDD28 … struct sc27xx_adc_data { … }; /* * Since different PMICs of SC27xx series can have different * address and ratio, we should save ratio config and base * in the device data structure. */ struct sc27xx_adc_variant_data { … }; struct sc27xx_adc_linear_graph { … }; /* * According to the datasheet, we can convert one ADC value to one voltage value * through 2 points in the linear graph. If the voltage is less than 1.2v, we * should use the small-scale graph, and if more than 1.2v, we should use the * big-scale graph. */ static struct sc27xx_adc_linear_graph big_scale_graph = …; static struct sc27xx_adc_linear_graph small_scale_graph = …; static const struct sc27xx_adc_linear_graph sc2731_big_scale_graph_calib = …; static const struct sc27xx_adc_linear_graph sc2731_small_scale_graph_calib = …; static const struct sc27xx_adc_linear_graph big_scale_graph_calib = …; static const struct sc27xx_adc_linear_graph small_scale_graph_calib = …; static int sc27xx_adc_get_calib_data(u32 calib_data, int calib_adc) { … } /* get the adc nvmem cell calibration data */ static int adc_nvmem_cell_calib_data(struct sc27xx_adc_data *data, const char *cell_name) { … } static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data, bool big_scale) { … } static int sc2720_adc_get_ratio(int channel, int scale) { … } static int sc2721_adc_get_ratio(int channel, int scale) { … } static int sc2730_adc_get_ratio(int channel, int scale) { … } static int sc2731_adc_get_ratio(int channel, int scale) { … } /* * According to the datasheet set specific value on some channel. */ static void sc2720_adc_scale_init(struct sc27xx_adc_data *data) { … } static void sc2730_adc_scale_init(struct sc27xx_adc_data *data) { … } static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) { … } static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, int scale, int *val) { … } static void sc27xx_adc_volt_ratio(struct sc27xx_adc_data *data, int channel, int scale, struct u32_fract *fract) { … } static int adc_to_volt(struct sc27xx_adc_linear_graph *graph, int raw_adc) { … } static int sc27xx_adc_to_volt(struct sc27xx_adc_linear_graph *graph, int raw_adc) { … } static int sc27xx_adc_convert_volt(struct sc27xx_adc_data *data, int channel, int scale, int raw_adc) { … } static int sc27xx_adc_read_processed(struct sc27xx_adc_data *data, int channel, int scale, int *val) { … } static int sc27xx_adc_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int sc27xx_adc_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info sc27xx_info = …; #define SC27XX_ADC_CHANNEL(index, mask) … static const struct iio_chan_spec sc27xx_channels[] = …; static int sc27xx_adc_enable(struct sc27xx_adc_data *data) { … } static void sc27xx_adc_disable(void *_data) { … } static const struct sc27xx_adc_variant_data sc2731_data = …; static const struct sc27xx_adc_variant_data sc2730_data = …; static const struct sc27xx_adc_variant_data sc2721_data = …; static const struct sc27xx_adc_variant_data sc2720_data = …; static int sc27xx_adc_probe(struct platform_device *pdev) { … } static const struct of_device_id sc27xx_adc_of_match[] = …; MODULE_DEVICE_TABLE(of, sc27xx_adc_of_match); static struct platform_driver sc27xx_adc_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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