// SPDX-License-Identifier: GPL-2.0-or-later /* * Real Time Clock interface for Linux on Atmel AT91RM9200 * * Copyright (C) 2002 Rick Bronson * * Converted to RTC class model by Andrew Victor * * Ported to Linux 2.6 by Steven Scholz * Based on s3c2410-rtc.c Simtec Electronics * * Based on sa1100-rtc.c by Nils Faerber * Based on rtc.c by Paul Gortmaker */ #include <linux/bcd.h> #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/interrupt.h> #include <linux/ioctl.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/rtc.h> #include <linux/spinlock.h> #include <linux/suspend.h> #include <linux/time.h> #include <linux/uaccess.h> #define AT91_RTC_CR … #define AT91_RTC_UPDTIM … #define AT91_RTC_UPDCAL … #define AT91_RTC_MR … #define AT91_RTC_HRMOD … #define AT91_RTC_NEGPPM … #define AT91_RTC_CORRECTION … #define AT91_RTC_HIGHPPM … #define AT91_RTC_TIMR … #define AT91_RTC_SEC … #define AT91_RTC_MIN … #define AT91_RTC_HOUR … #define AT91_RTC_AMPM … #define AT91_RTC_CALR … #define AT91_RTC_CENT … #define AT91_RTC_YEAR … #define AT91_RTC_MONTH … #define AT91_RTC_DAY … #define AT91_RTC_DATE … #define AT91_RTC_TIMALR … #define AT91_RTC_SECEN … #define AT91_RTC_MINEN … #define AT91_RTC_HOUREN … #define AT91_RTC_CALALR … #define AT91_RTC_MTHEN … #define AT91_RTC_DATEEN … #define AT91_RTC_SR … #define AT91_RTC_ACKUPD … #define AT91_RTC_ALARM … #define AT91_RTC_SECEV … #define AT91_RTC_TIMEV … #define AT91_RTC_CALEV … #define AT91_RTC_SCCR … #define AT91_RTC_IER … #define AT91_RTC_IDR … #define AT91_RTC_IMR … #define AT91_RTC_VER … #define AT91_RTC_NVTIM … #define AT91_RTC_NVCAL … #define AT91_RTC_NVTIMALR … #define AT91_RTC_NVCALALR … #define AT91_RTC_CORR_DIVIDEND … #define AT91_RTC_CORR_LOW_RATIO … #define at91_rtc_read(field) … #define at91_rtc_write(field, val) … struct at91_rtc_config { … }; static const struct at91_rtc_config *at91_rtc_config; static DECLARE_COMPLETION(at91_rtc_updated); static DECLARE_COMPLETION(at91_rtc_upd_rdy); static void __iomem *at91_rtc_regs; static int irq; static DEFINE_SPINLOCK(at91_rtc_lock); static u32 at91_rtc_shadow_imr; static bool suspended; static DEFINE_SPINLOCK(suspended_lock); static unsigned long cached_events; static u32 at91_rtc_imr; static struct clk *sclk; static void at91_rtc_write_ier(u32 mask) { … } static void at91_rtc_write_idr(u32 mask) { … } static u32 at91_rtc_read_imr(void) { … } /* * Decode time/date into rtc_time structure */ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, struct rtc_time *tm) { … } /* * Read current time and date in RTC */ static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm) { … } /* * Set current time and date in RTC */ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) { … } /* * Read alarm time and date in RTC */ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) { … } /* * Set alarm time and date in RTC */ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static int at91_rtc_readoffset(struct device *dev, long *offset) { … } static int at91_rtc_setoffset(struct device *dev, long offset) { … } /* * IRQ handler for the RTC */ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) { … } static const struct at91_rtc_config at91rm9200_config = …; static const struct at91_rtc_config at91sam9x5_config = …; static const struct at91_rtc_config sama5d4_config = …; static const struct of_device_id at91_rtc_dt_ids[] = …; MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids); static const struct rtc_class_ops at91_rtc_ops = …; static const struct rtc_class_ops sama5d4_rtc_ops = …; /* * Initialize and install RTC driver */ static int __init at91_rtc_probe(struct platform_device *pdev) { … } /* * Disable and remove the RTC driver */ static void __exit at91_rtc_remove(struct platform_device *pdev) { … } static void at91_rtc_shutdown(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP /* AT91RM9200 RTC Power management control */ static int at91_rtc_suspend(struct device *dev) { … } static int at91_rtc_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume); /* * at91_rtc_remove() lives in .exit.text. For drivers registered via * module_platform_driver_probe() this is ok because they cannot get unbound at * runtime. So mark the driver struct with __refdata to prevent modpost * triggering a section mismatch warning. */ static struct platform_driver at91_rtc_driver __refdata = …; module_platform_driver_probe(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux