// SPDX-License-Identifier: GPL-2.0-only /* * MediaTek MT6359 PMIC AUXADC IIO driver * * Copyright (c) 2021 MediaTek Inc. * Copyright (c) 2024 Collabora Ltd * Author: AngeloGioacchino Del Regno <[email protected]> */ #include <linux/bits.h> #include <linux/cleanup.h> #include <linux/delay.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/types.h> #include <linux/iio/iio.h> #include <linux/mfd/mt6397/core.h> #include <dt-bindings/iio/adc/mediatek,mt6357-auxadc.h> #include <dt-bindings/iio/adc/mediatek,mt6358-auxadc.h> #include <dt-bindings/iio/adc/mediatek,mt6359-auxadc.h> #define AUXADC_AVG_TIME_US … #define AUXADC_POLL_DELAY_US … #define AUXADC_TIMEOUT_US … #define AUXADC_VOLT_FULL … #define IMP_STOP_DELAY_US … #define IMP_POLL_DELAY_US … /* For PMIC_RG_RESET_VAL and MT6358_IMP0_CLEAR, the bits specific purpose is unknown. */ #define PMIC_RG_RESET_VAL … #define PMIC_AUXADC_RDY_BIT … #define MT6357_IMP_ADC_NUM … #define MT6358_IMP_ADC_NUM … #define MT6358_DCM_CK_SW_EN … #define MT6358_IMP0_CLEAR … #define MT6358_IMP0_IRQ_RDY … #define MT6358_IMP1_AUTOREPEAT_EN … #define MT6359_IMP0_CONV_EN … #define MT6359_IMP1_IRQ_RDY … enum mtk_pmic_auxadc_regs { … }; enum mtk_pmic_auxadc_channels { … }; /** * struct mt6359_auxadc - Main driver structure * @dev: Device pointer * @regmap: Regmap from SoC PMIC Wrapper * @chip_info: PMIC specific chip info * @lock: Mutex to serialize AUXADC reading vs configuration * @timed_out: Signals whether the last read timed out */ struct mt6359_auxadc { … }; /** * struct mtk_pmic_auxadc_chan - PMIC AUXADC channel data * @req_idx: Request register number * @req_mask: Bitmask to activate a channel * @num_samples: Number of AUXADC samples for averaging * @r_ratio: Resistance ratio fractional */ struct mtk_pmic_auxadc_chan { … }; /** * struct mtk_pmic_auxadc_info - PMIC specific chip info * @model_name: PMIC model name * @channels: IIO specification of ADC channels * @num_channels: Number of ADC channels * @desc: PMIC AUXADC channel data * @regs: List of PMIC specific registers * @sec_unlock_key: Security unlock key for HK_TOP writes * @imp_adc_num: ADC channel for battery impedance readings * @read_imp: Callback to read impedance channels */ struct mtk_pmic_auxadc_info { … }; #define MTK_PMIC_ADC_CHAN(_ch_idx, _req_idx, _req_bit, _samples, _rnum, _rdiv) … #define MTK_PMIC_IIO_CHAN(_model, _name, _ch_idx, _adc_idx, _nbits, _ch_type) … static const struct iio_chan_spec mt6357_auxadc_channels[] = …; static const struct mtk_pmic_auxadc_chan mt6357_auxadc_ch_desc[] = …; static const u16 mt6357_auxadc_regs[] = …; static const struct iio_chan_spec mt6358_auxadc_channels[] = …; static const struct mtk_pmic_auxadc_chan mt6358_auxadc_ch_desc[] = …; static const u16 mt6358_auxadc_regs[] = …; static const struct iio_chan_spec mt6359_auxadc_channels[] = …; static const struct mtk_pmic_auxadc_chan mt6359_auxadc_ch_desc[] = …; static const u16 mt6359_auxadc_regs[] = …; static void mt6358_stop_imp_conv(struct mt6359_auxadc *adc_dev) { … } static int mt6358_start_imp_conv(struct mt6359_auxadc *adc_dev) { … } static int mt6358_read_imp(struct mt6359_auxadc *adc_dev, int *vbat, int *ibat) { … } static int mt6359_read_imp(struct mt6359_auxadc *adc_dev, int *vbat, int *ibat) { … } static const struct mtk_pmic_auxadc_info mt6357_chip_info = …; static const struct mtk_pmic_auxadc_info mt6358_chip_info = …; static const struct mtk_pmic_auxadc_info mt6359_chip_info = …; static void mt6359_auxadc_reset(struct mt6359_auxadc *adc_dev) { … } static int mt6359_auxadc_read_adc(struct mt6359_auxadc *adc_dev, const struct iio_chan_spec *chan, int *out) { … } static int mt6359_auxadc_read_label(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, char *label) { … } static int mt6359_auxadc_read_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long mask) { … } static const struct iio_info mt6359_auxadc_iio_info = …; static int mt6359_auxadc_probe(struct platform_device *pdev) { … } static const struct of_device_id mt6359_auxadc_of_match[] = …; MODULE_DEVICE_TABLE(of, mt6359_auxadc_of_match); static struct platform_driver mt6359_auxadc_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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