uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * (C) Copyright 2010

 * Heiko Schocher, DENX Software Engineering, hs@denx.de

 */

#include <common.h>

#include <command.h>

#include <i2c.h>

#include <rtc.h>

​

#define RTC_RV3029_CTRL1    0x00

#define RTC_RV3029_CTRL1_EERE   (1 << 3)

​

#define RTC_RV3029_CTRL_STATUS  0x03

#define RTC_RV3029_CTRLS_EEBUSY (1 << 7)

​

#define RTC_RV3029_CTRL_RESET   0x04

#define RTC_RV3029_CTRL_SYS_R   (1 << 4)

​

#define RTC_RV3029_CLOCK_PAGE   0x08

#define RTC_RV3029_PAGE_LEN 7

​

#define RV3029C2_W_SECONDS  0x00

#define RV3029C2_W_MINUTES  0x01

#define RV3029C2_W_HOURS    0x02

#define RV3029C2_W_DATE     0x03

#define RV3029C2_W_DAYS     0x04

#define RV3029C2_W_MONTHS   0x05

#define RV3029C2_W_YEARS    0x06

​

#define RV3029C2_REG_HR_12_24          (1 << 6)  /* 24h/12h mode */

#define RV3029C2_REG_HR_PM             (1 << 5)  /* PM/AM bit in 12h mode */

​

#define RTC_RV3029_EEPROM_CTRL  0x30

#define RTC_RV3029_TRICKLE_1K   (1 << 4)

#define RTC_RV3029_TRICKLE_5K   (1 << 5)

#define RTC_RV3029_TRICKLE_20K  (1 << 6)

#define RTC_RV3029_TRICKLE_80K  (1 << 7)

​

int rtc_get( struct rtc_time *tmp )

{

    int ret;

    unsigned char buf[RTC_RV3029_PAGE_LEN];

​

    ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \

            RTC_RV3029_PAGE_LEN);

    if (ret) {

        printf("%s: error reading RTC: %x\n", __func__, ret);

        return -1;

    }

    tmp->tm_sec  = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f);

    tmp->tm_min  = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f);

    if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) {

        /* 12h format */

        tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f);

        if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM)

            /* PM flag set */

            tmp->tm_hour += 12;

    } else

        tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f);

​

    tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F );

    tmp->tm_mon  = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F );