// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2013 Capella Microsystems Inc. * Author: Kevin Tsai <[email protected]> */ #include <linux/acpi.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/interrupt.h> #include <linux/regulator/consumer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/init.h> /* Registers Address */ #define CM32181_REG_ADDR_CMD … #define CM32181_REG_ADDR_WH … #define CM32181_REG_ADDR_WL … #define CM32181_REG_ADDR_TEST … #define CM32181_REG_ADDR_ALS … #define CM32181_REG_ADDR_STATUS … #define CM32181_REG_ADDR_ID … /* Number of Configurable Registers */ #define CM32181_CONF_REG_NUM … /* CMD register */ #define CM32181_CMD_ALS_DISABLE … #define CM32181_CMD_ALS_INT_EN … #define CM32181_CMD_ALS_THRES_WINDOW … #define CM32181_CMD_ALS_PERS_SHIFT … #define CM32181_CMD_ALS_PERS_MASK … #define CM32181_CMD_ALS_PERS_DEFAULT … #define CM32181_CMD_ALS_IT_SHIFT … #define CM32181_CMD_ALS_IT_MASK … #define CM32181_CMD_ALS_IT_DEFAULT … #define CM32181_CMD_ALS_SM_SHIFT … #define CM32181_CMD_ALS_SM_MASK … #define CM32181_CMD_ALS_SM_DEFAULT … #define CM32181_LUX_PER_BIT … #define CM32181_LUX_PER_BIT_RESOLUTION … #define CM32181_LUX_PER_BIT_BASE_IT … #define CM32181_CALIBSCALE_DEFAULT … #define CM32181_CALIBSCALE_RESOLUTION … #define SMBUS_ALERT_RESPONSE_ADDRESS … /* CPM0 Index 0: device-id (3218 or 32181), 1: Unknown, 2: init_regs_bitmap */ #define CPM0_REGS_BITMAP … #define CPM0_HEADER_SIZE … /* CPM1 Index 0: lux_per_bit, 1: calibscale, 2: resolution (100000) */ #define CPM1_LUX_PER_BIT … #define CPM1_CALIBSCALE … #define CPM1_SIZE … /* CM3218 Family */ static const int cm3218_als_it_bits[] = …; static const int cm3218_als_it_values[] = …; /* CM32181 Family */ static const int cm32181_als_it_bits[] = …; static const int cm32181_als_it_values[] = …; struct cm32181_chip { … }; static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val2); #ifdef CONFIG_ACPI /** * cm32181_acpi_get_cpm() - Get CPM object from ACPI * @dev: pointer of struct device. * @obj_name: pointer of ACPI object name. * @values: pointer of array for return elements. * @count: maximum size of return array. * * Convert ACPI CPM table to array. * * Return: -ENODEV for fail. Otherwise is number of elements. */ static int cm32181_acpi_get_cpm(struct device *dev, char *obj_name, u64 *values, int count) { … } static void cm32181_acpi_parse_cpm_tables(struct cm32181_chip *cm32181) { … } #else static void cm32181_acpi_parse_cpm_tables(struct cm32181_chip *cm32181) { } #endif /* CONFIG_ACPI */ /** * cm32181_reg_init() - Initialize CM32181 registers * @cm32181: pointer of struct cm32181. * * Initialize CM32181 ambient light sensor register to default values. * * Return: 0 for success; otherwise for error code. */ static int cm32181_reg_init(struct cm32181_chip *cm32181) { … } /** * cm32181_read_als_it() - Get sensor integration time (ms) * @cm32181: pointer of struct cm32181 * @val2: pointer of int to load the als_it value. * * Report the current integration time in milliseconds. * * Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL. */ static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val2) { … } /** * cm32181_write_als_it() - Write sensor integration time * @cm32181: pointer of struct cm32181. * @val: integration time by millisecond. * * Convert integration time (ms) to sensor value. * * Return: i2c_smbus_write_word_data command return value. */ static int cm32181_write_als_it(struct cm32181_chip *cm32181, int val) { … } /** * cm32181_get_lux() - report current lux value * @cm32181: pointer of struct cm32181. * * Convert sensor raw data to lux. It depends on integration * time and calibscale variable. * * Return: Positive value is lux, otherwise is error code. */ static int cm32181_get_lux(struct cm32181_chip *cm32181) { … } static int cm32181_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int cm32181_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } /** * cm32181_get_it_available() - Get available ALS IT value * @dev: pointer of struct device. * @attr: pointer of struct device_attribute. * @buf: pointer of return string buffer. * * Display the available integration time values by millisecond. * * Return: string length. */ static ssize_t cm32181_get_it_available(struct device *dev, struct device_attribute *attr, char *buf) { … } static const struct iio_chan_spec cm32181_channels[] = …; static IIO_DEVICE_ATTR(in_illuminance_integration_time_available, S_IRUGO, cm32181_get_it_available, NULL, 0); static struct attribute *cm32181_attributes[] = …; static const struct attribute_group cm32181_attribute_group = …; static const struct iio_info cm32181_info = …; static void cm32181_unregister_dummy_client(void *data) { … } static int cm32181_probe(struct i2c_client *client) { … } static int cm32181_suspend(struct device *dev) { … } static int cm32181_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(cm32181_pm_ops, cm32181_suspend, cm32181_resume); static const struct of_device_id cm32181_of_match[] = …; MODULE_DEVICE_TABLE(of, cm32181_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id cm32181_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, cm32181_acpi_match); #endif static struct i2c_driver cm32181_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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