// SPDX-License-Identifier: GPL-2.0-only /* * drivers/rtc/rtc-spear.c * * Copyright (C) 2010 ST Microelectronics * Rajeev Kumar<[email protected]> */ #include <linux/bcd.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/rtc.h> #include <linux/slab.h> #include <linux/spinlock.h> /* RTC registers */ #define TIME_REG … #define DATE_REG … #define ALARM_TIME_REG … #define ALARM_DATE_REG … #define CTRL_REG … #define STATUS_REG … /* TIME_REG & ALARM_TIME_REG */ #define SECONDS_UNITS … #define SECONDS_TENS … #define MINUTES_UNITS … #define MINUTES_TENS … #define HOURS_UNITS … #define HOURS_TENS … /* DATE_REG & ALARM_DATE_REG */ #define DAYS_UNITS … #define DAYS_TENS … #define MONTHS_UNITS … #define MONTHS_TENS … #define YEARS_UNITS … #define YEARS_TENS … #define YEARS_HUNDREDS … #define YEARS_MILLENIUMS … /* MASK SHIFT TIME_REG & ALARM_TIME_REG*/ #define SECOND_SHIFT … #define MINUTE_SHIFT … #define HOUR_SHIFT … #define MDAY_SHIFT … #define MONTH_SHIFT … #define YEAR_SHIFT … #define SECOND_MASK … #define MIN_MASK … #define HOUR_MASK … #define DAY_MASK … #define MONTH_MASK … #define YEAR_MASK … /* date reg equal to time reg, for debug only */ #define TIME_BYP … #define INT_ENABLE … /* STATUS_REG */ #define CLK_UNCONNECTED … #define PEND_WR_TIME … #define PEND_WR_DATE … #define LOST_WR_TIME … #define LOST_WR_DATE … #define RTC_INT_MASK … #define STATUS_BUSY … #define STATUS_FAIL … struct spear_rtc_config { … }; static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config) { … } static inline void spear_rtc_enable_interrupt(struct spear_rtc_config *config) { … } static inline void spear_rtc_disable_interrupt(struct spear_rtc_config *config) { … } static inline int is_write_complete(struct spear_rtc_config *config) { … } static void rtc_wait_not_busy(struct spear_rtc_config *config) { … } static irqreturn_t spear_rtc_irq(int irq, void *dev_id) { … } static void tm2bcd(struct rtc_time *tm) { … } static void bcd2tm(struct rtc_time *tm) { … } /* * spear_rtc_read_time - set the time * @dev: rtc device in use * @tm: holds date and time * * This function read time and date. On success it will return 0 * otherwise -ve error is returned. */ static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } /* * spear_rtc_set_time - set the time * @dev: rtc device in use * @tm: holds date and time * * This function set time and date. On success it will return 0 * otherwise -ve error is returned. */ static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } /* * spear_rtc_read_alarm - read the alarm time * @dev: rtc device in use * @alm: holds alarm date and time * * This function read alarm time and date. On success it will return 0 * otherwise -ve error is returned. */ static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { … } /* * spear_rtc_set_alarm - set the alarm time * @dev: rtc device in use * @alm: holds alarm date and time * * This function set alarm time and date. On success it will return 0 * otherwise -ve error is returned. */ static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) { … } static int spear_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static const struct rtc_class_ops spear_rtc_ops = …; static int spear_rtc_probe(struct platform_device *pdev) { … } static void spear_rtc_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int spear_rtc_suspend(struct device *dev) { … } static int spear_rtc_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(spear_rtc_pm_ops, spear_rtc_suspend, spear_rtc_resume); static void spear_rtc_shutdown(struct platform_device *pdev) { … } #ifdef CONFIG_OF static const struct of_device_id spear_rtc_id_table[] = …; MODULE_DEVICE_TABLE(of, spear_rtc_id_table); #endif static struct platform_driver spear_rtc_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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