// SPDX-License-Identifier: GPL-2.0-or-later /* * RTC client/driver for the Maxim/Dallas DS3232/DS3234 Real-Time Clock * * Copyright (C) 2009-2011 Freescale Semiconductor. * Author: Jack Lan <[email protected]> * Copyright (C) 2008 MIMOMax Wireless Ltd. */ #define pr_fmt(fmt) … #include <linux/kernel.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/spi/spi.h> #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/slab.h> #include <linux/regmap.h> #include <linux/hwmon.h> #define DS3232_REG_SECONDS … #define DS3232_REG_MINUTES … #define DS3232_REG_HOURS … #define DS3232_REG_AMPM … #define DS3232_REG_DAY … #define DS3232_REG_DATE … #define DS3232_REG_MONTH … #define DS3232_REG_CENTURY … #define DS3232_REG_YEAR … #define DS3232_REG_ALARM1 … #define DS3232_REG_ALARM2 … #define DS3232_REG_CR … #define DS3232_REG_CR_nEOSC … #define DS3232_REG_CR_INTCN … #define DS3232_REG_CR_A2IE … #define DS3232_REG_CR_A1IE … #define DS3232_REG_SR … #define DS3232_REG_SR_OSF … #define DS3232_REG_SR_BSY … #define DS3232_REG_SR_A2F … #define DS3232_REG_SR_A1F … #define DS3232_REG_TEMPERATURE … #define DS3232_REG_SRAM_START … #define DS3232_REG_SRAM_END … #define DS3232_REG_SRAM_SIZE … struct ds3232 { … }; static int ds3232_check_rtc_status(struct device *dev) { … } static int ds3232_read_time(struct device *dev, struct rtc_time *time) { … } static int ds3232_set_time(struct device *dev, struct rtc_time *time) { … } /* * DS3232 has two alarm, we only use alarm1 * According to linux specification, only support one-shot alarm * no periodic alarm mode */ static int ds3232_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) { … } /* * linux rtc-module does not support wday alarm * and only 24h time mode supported indeed */ static int ds3232_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) { … } static int ds3232_update_alarm(struct device *dev, unsigned int enabled) { … } /* * Temperature sensor support for ds3232/ds3234 devices. * A user-initiated temperature conversion is not started by this function, * so the temperature is updated once every 64 seconds. */ static int ds3232_hwmon_read_temp(struct device *dev, long int *mC) { … } static umode_t ds3232_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static int ds3232_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *temp) { … } static u32 ds3232_hwmon_chip_config[] = …; static const struct hwmon_channel_info ds3232_hwmon_chip = …; static u32 ds3232_hwmon_temp_config[] = …; static const struct hwmon_channel_info ds3232_hwmon_temp = …; static const struct hwmon_channel_info * const ds3232_hwmon_info[] = …; static const struct hwmon_ops ds3232_hwmon_hwmon_ops = …; static const struct hwmon_chip_info ds3232_hwmon_chip_info = …; static void ds3232_hwmon_register(struct device *dev, const char *name) { … } static int ds3232_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static irqreturn_t ds3232_irq(int irq, void *dev_id) { … } static const struct rtc_class_ops ds3232_rtc_ops = …; static int ds3232_nvmem_read(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int ds3232_nvmem_write(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int ds3232_probe(struct device *dev, struct regmap *regmap, int irq, const char *name) { … } #if IS_ENABLED(CONFIG_I2C) #ifdef CONFIG_PM_SLEEP static int ds3232_suspend(struct device *dev) { … } static int ds3232_resume(struct device *dev) { … } #endif static const struct dev_pm_ops ds3232_pm_ops = …; static int ds3232_i2c_probe(struct i2c_client *client) { … } static const struct i2c_device_id ds3232_id[] = …; MODULE_DEVICE_TABLE(i2c, ds3232_id); static const __maybe_unused struct of_device_id ds3232_of_match[] = …; MODULE_DEVICE_TABLE(of, ds3232_of_match); static struct i2c_driver ds3232_driver = …; static int ds3232_register_driver(void) { … } static void ds3232_unregister_driver(void) { … } #else static int ds3232_register_driver(void) { return 0; } static void ds3232_unregister_driver(void) { } #endif #if IS_ENABLED(CONFIG_SPI_MASTER) static int ds3234_probe(struct spi_device *spi) { … } static struct spi_driver ds3234_driver = …; static int ds3234_register_driver(void) { … } static void ds3234_unregister_driver(void) { … } #else static int ds3234_register_driver(void) { return 0; } static void ds3234_unregister_driver(void) { } #endif static int __init ds323x_init(void) { … } module_init(…) … static void __exit ds323x_exit(void) { … } module_exit(…) MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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