linux/drivers/rtc/rtc-lpc24xx.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * RTC driver for NXP LPC178x/18xx/43xx Real-Time Clock (RTC)
 *
 * Copyright (C) 2011 NXP Semiconductors
 * Copyright (C) 2015 Joachim Eastwood <[email protected]>
 */

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>

/* LPC24xx RTC register offsets and bits */
#define LPC24XX_ILR …
#define LPC24XX_RTCCIF …
#define LPC24XX_RTCALF …
#define LPC24XX_CTC …
#define LPC24XX_CCR …
#define LPC24XX_CLKEN …
#define LPC178X_CCALEN …
#define LPC24XX_CIIR …
#define LPC24XX_AMR …
#define LPC24XX_ALARM_DISABLE …
#define LPC24XX_CTIME0 …
#define LPC24XX_CTIME1 …
#define LPC24XX_CTIME2 …
#define LPC24XX_SEC …
#define LPC24XX_MIN …
#define LPC24XX_HOUR …
#define LPC24XX_DOM …
#define LPC24XX_DOW …
#define LPC24XX_DOY …
#define LPC24XX_MONTH …
#define LPC24XX_YEAR …
#define LPC24XX_ALSEC …
#define LPC24XX_ALMIN …
#define LPC24XX_ALHOUR …
#define LPC24XX_ALDOM …
#define LPC24XX_ALDOW …
#define LPC24XX_ALDOY …
#define LPC24XX_ALMON …
#define LPC24XX_ALYEAR …

/* Macros to read fields in consolidated time (CT) registers */
#define CT0_SECS(x) …
#define CT0_MINS(x) …
#define CT0_HOURS(x) …
#define CT0_DOW(x) …
#define CT1_DOM(x) …
#define CT1_MONTH(x) …
#define CT1_YEAR(x) …
#define CT2_DOY(x) …

#define rtc_readl(dev, reg) …
#define rtc_writel(dev, reg, val) …

struct lpc24xx_rtc { … };

static int lpc24xx_rtc_set_time(struct device *dev, struct rtc_time *tm)
{ … }

static int lpc24xx_rtc_read_time(struct device *dev, struct rtc_time *tm)
{ … }

static int lpc24xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
{ … }

static int lpc24xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
{ … }

static int lpc24xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
{ … }

static irqreturn_t lpc24xx_rtc_interrupt(int irq, void *data)
{ … }

static const struct rtc_class_ops lpc24xx_rtc_ops = …;

static int lpc24xx_rtc_probe(struct platform_device *pdev)
{ … }

static void lpc24xx_rtc_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id lpc24xx_rtc_match[] = …;
MODULE_DEVICE_TABLE(of, lpc24xx_rtc_match);

static struct platform_driver lpc24xx_rtc_driver = …;
module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;