// SPDX-License-Identifier: GPL-2.0-only /* rtc-ds1343.c * * Driver for Dallas Semiconductor DS1343 Low Current, SPI Compatible * Real Time Clock * * Author : Raghavendra Chandra Ganiga <[email protected]> * Ankur Srivastava <[email protected]> : DS1343 Nvram Support */ #include <linux/init.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/device.h> #include <linux/spi/spi.h> #include <linux/regmap.h> #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/pm.h> #include <linux/pm_wakeirq.h> #include <linux/slab.h> #define DALLAS_MAXIM_DS1343 … #define DALLAS_MAXIM_DS1344 … /* RTC DS1343 Registers */ #define DS1343_SECONDS_REG … #define DS1343_MINUTES_REG … #define DS1343_HOURS_REG … #define DS1343_DAY_REG … #define DS1343_DATE_REG … #define DS1343_MONTH_REG … #define DS1343_YEAR_REG … #define DS1343_ALM0_SEC_REG … #define DS1343_ALM0_MIN_REG … #define DS1343_ALM0_HOUR_REG … #define DS1343_ALM0_DAY_REG … #define DS1343_ALM1_SEC_REG … #define DS1343_ALM1_MIN_REG … #define DS1343_ALM1_HOUR_REG … #define DS1343_ALM1_DAY_REG … #define DS1343_CONTROL_REG … #define DS1343_STATUS_REG … #define DS1343_TRICKLE_REG … #define DS1343_NVRAM … #define DS1343_NVRAM_LEN … /* DS1343 Control Registers bits */ #define DS1343_EOSC … #define DS1343_DOSF … #define DS1343_EGFIL … #define DS1343_SQW … #define DS1343_INTCN … #define DS1343_A1IE … #define DS1343_A0IE … /* DS1343 Status Registers bits */ #define DS1343_OSF … #define DS1343_IRQF1 … #define DS1343_IRQF0 … /* DS1343 Trickle Charger Registers bits */ #define DS1343_TRICKLE_MAGIC … #define DS1343_TRICKLE_DS1 … #define DS1343_TRICKLE_1K … #define DS1343_TRICKLE_2K … #define DS1343_TRICKLE_4K … static const struct spi_device_id ds1343_id[] = …; MODULE_DEVICE_TABLE(spi, ds1343_id); struct ds1343_priv { … }; static ssize_t ds1343_show_glitchfilter(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ds1343_store_glitchfilter(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter, ds1343_store_glitchfilter); static int ds1343_nvram_write(void *priv, unsigned int off, void *val, size_t bytes) { … } static int ds1343_nvram_read(void *priv, unsigned int off, void *val, size_t bytes) { … } static ssize_t ds1343_show_tricklecharger(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL); static struct attribute *ds1343_attrs[] = …; static const struct attribute_group ds1343_attr_group = …; static int ds1343_read_time(struct device *dev, struct rtc_time *dt) { … } static int ds1343_set_time(struct device *dev, struct rtc_time *dt) { … } static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) { … } static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) { … } static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static irqreturn_t ds1343_thread(int irq, void *dev_id) { … } static const struct rtc_class_ops ds1343_rtc_ops = …; static int ds1343_probe(struct spi_device *spi) { … } static void ds1343_remove(struct spi_device *spi) { … } #ifdef CONFIG_PM_SLEEP static int ds1343_suspend(struct device *dev) { … } static int ds1343_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume); static struct spi_driver ds1343_driver = …; module_spi_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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