linux-imx

/*

 * Xilinx Zynq Ultrascale+ MPSoC Real Time Clock Driver

 *

 * Copyright (C) 2015 Xilinx, Inc.

 *

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

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program. If not, see <http://www.gnu.org/licenses/>.

 *

 */

​

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

​

/* RTC Registers */

#define RTC_SET_TM_WR       0x00

#define RTC_SET_TM_RD       0x04

#define RTC_CALIB_WR        0x08

#define RTC_CALIB_RD        0x0C

#define RTC_CUR_TM      0x10

#define RTC_CUR_TICK        0x14

#define RTC_ALRM        0x18

#define RTC_INT_STS     0x20

#define RTC_INT_MASK        0x24

#define RTC_INT_EN      0x28

#define RTC_INT_DIS     0x2C

#define RTC_CTRL        0x40

​

#define RTC_FR_EN       BIT(20)

#define RTC_FR_DATSHIFT     16

#define RTC_TICK_MASK       0xFFFF

#define RTC_INT_SEC     BIT(0)

#define RTC_INT_ALRM        BIT(1)

#define RTC_OSC_EN      BIT(24)

#define RTC_BATT_EN     BIT(31)

​

#define RTC_CALIB_DEF       0x198233

#define RTC_CALIB_MASK      0x1FFFFF

​

struct xlnx_rtc_dev {

    struct rtc_device   *rtc;

    void __iomem        *reg_base;

    int         alarm_irq;

    int         sec_irq;

    int         calibval;

};

​

static int xlnx_rtc_set_time(struct device *dev, struct rtc_time *tm)

{

    struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev);