linux-imx

/*

 * SiRFSoC Real Time Clock interface for Linux

 *

 * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company.

 *

 * Licensed under GPLv2 or later.

 */

​

#include <linux/module.h>

#include <linux/err.h>

#include <linux/rtc.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/regmap.h>

#include <linux/rtc/sirfsoc_rtciobrg.h>

​

​

#define RTC_CN          0x00

#define RTC_ALARM0      0x04

#define RTC_ALARM1      0x18

#define RTC_STATUS      0x08

#define RTC_SW_VALUE            0x40

#define SIRFSOC_RTC_AL1E    (1<<6)

#define SIRFSOC_RTC_AL1     (1<<4)

#define SIRFSOC_RTC_HZE     (1<<3)

#define SIRFSOC_RTC_AL0E    (1<<2)

#define SIRFSOC_RTC_HZ      (1<<1)

#define SIRFSOC_RTC_AL0     (1<<0)

#define RTC_DIV         0x0c

#define RTC_DEEP_CTRL       0x14

#define RTC_CLOCK_SWITCH    0x1c

#define SIRFSOC_RTC_CLK     0x03    /* others are reserved */

​

/* Refer to RTC DIV switch */

#define RTC_HZ          16

​

/* This macro is also defined in arch/arm/plat-sirfsoc/cpu.c */

#define RTC_SHIFT       4

​

#define INTR_SYSRTC_CN      0x48

​

struct sirfsoc_rtc_drv {

    struct rtc_device   *rtc;

    u32         rtc_base;

    u32         irq;

    unsigned        irq_wake;

    /* Overflow for every 8 years extra time */

    u32         overflow_rtc;

    spinlock_t      lock;

    struct regmap *regmap;

#ifdef CONFIG_PM

    u32     saved_counter;

    u32     saved_overflow_rtc;

#endif

};

​

static u32 sirfsoc_rtc_readl(struct sirfsoc_rtc_drv *rtcdrv, u32 offset)

{

    u32 val;

​

    regmap_read(rtcdrv->regmap, rtcdrv->rtc_base + offset, &val);