linux/drivers/rtc/rtc-rc5t583.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * rtc-rc5t583.c -- RICOH RC5T583 Real Time Clock
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Venu Byravarasu <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mfd/rc5t583.h>

struct rc5t583_rtc { … };

/* Total number of RTC registers needed to set time*/
#define NUM_TIME_REGS …

/* Total number of RTC registers needed to set Y-Alarm*/
#define NUM_YAL_REGS …

/* Set Y-Alarm interrupt */
#define SET_YAL …

/* Get Y-Alarm interrupt status*/
#define GET_YAL_STATUS …

static int rc5t583_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
{ … }

/*
 * Gets current rc5t583 RTC time and date parameters.
 *
 * The RTC's time/alarm representation is not what gmtime(3) requires
 * Linux to use:
 *
 *  - Months are 1..12 vs Linux 0-11
 *  - Years are 0..99 vs Linux 1900..N (we assume 21st century)
 */
static int rc5t583_rtc_read_time(struct device *dev, struct rtc_time *tm)
{ … }

static int rc5t583_rtc_set_time(struct device *dev, struct rtc_time *tm)
{ … }

static int rc5t583_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{ … }

static int rc5t583_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{ … }

static irqreturn_t rc5t583_rtc_interrupt(int irq, void *rtc)
{ … }

static const struct rtc_class_ops rc5t583_rtc_ops = …;

static int rc5t583_rtc_probe(struct platform_device *pdev)
{ … }

/*
 * Disable rc5t583 RTC interrupts.
 * Sets status flag to free.
 */
static void rc5t583_rtc_remove(struct platform_device *pdev)
{ … }

#ifdef CONFIG_PM_SLEEP
static int rc5t583_rtc_suspend(struct device *dev)
{ … }

static int rc5t583_rtc_resume(struct device *dev)
{ … }
#endif

static SIMPLE_DEV_PM_OPS(rc5t583_rtc_pm_ops, rc5t583_rtc_suspend,
			rc5t583_rtc_resume);

static struct platform_driver rc5t583_rtc_driver = …;

module_platform_driver(…) …;
MODULE_ALIAS(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;