linux-imx

/*

 * Driver for MediaTek SoC based RTC

 *

 * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 of

 * the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 */

​

#include <linux/clk.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

​

#define MTK_RTC_DEV KBUILD_MODNAME

​

#define MTK_RTC_PWRCHK1     0x4

#define RTC_PWRCHK1_MAGIC   0xc6

​

#define MTK_RTC_PWRCHK2     0x8

#define RTC_PWRCHK2_MAGIC   0x9a

​

#define MTK_RTC_KEY     0xc

#define RTC_KEY_MAGIC       0x59

​

#define MTK_RTC_PROT1       0x10

#define RTC_PROT1_MAGIC     0xa3

​

#define MTK_RTC_PROT2       0x14

#define RTC_PROT2_MAGIC     0x57

​

#define MTK_RTC_PROT3       0x18

#define RTC_PROT3_MAGIC     0x67

​

#define MTK_RTC_PROT4       0x1c

#define RTC_PROT4_MAGIC     0xd2

​

#define MTK_RTC_CTL     0x20

#define RTC_RC_STOP     BIT(0)

​

#define MTK_RTC_DEBNCE      0x2c

#define RTC_DEBNCE_MASK     GENMASK(2, 0)

​

#define MTK_RTC_INT     0x30

#define RTC_INT_AL_STA      BIT(4)

​

/*

 * Ranges from 0x40 to 0x78 provide RTC time setup for year, month,

 * day of month, day of week, hour, minute and second.

 */

#define MTK_RTC_TREG(_t, _f)    (0x40 + (0x4 * (_f)) + ((_t) * 0x20))

​

#define MTK_RTC_AL_CTL      0x7c