Function cvmx_rtc_ds1337_write

freebsd/mips/cavium/octeon_ds1337.c:150–201

* Board-specific RTC write * Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC) */

 * Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC)
 */
int cvmx_rtc_ds1337_write(uint32_t time)
{
    struct clocktime ct;
    struct timespec ts;
    int       i, rc, retry;
    uint8_t   reg[8];
    uint8_t   sec;

    ts.tv_sec = time;
    ts.tv_nsec = 0;

    clock_ts_to_ct(&ts, &ct);

    if (validate_ct_struct(&ct))
    {
	cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n");
	goto ct_invalid;
    }

    reg[0] = bin2bcd(ct.sec);
    reg[1] = bin2bcd(ct.min);
    reg[2] = bin2bcd(ct.hour);       /* Force 0..23 format even if using AM/PM */
    reg[3] = bin2bcd(ct.dow + 1);
    reg[4] = bin2bcd(ct.day);
    reg[5] = bin2bcd(ct.mon);
#if !defined(OCTEON_BOARD_CAPK_0100ND)
    if (ct.year >= 2000)             /* Set century bit*/
    {
	reg[5] |= 0x80;
    }
#endif
    reg[6] = bin2bcd(ct.year % 100);

    /* Lockless write: detects the infrequent roll-over and retries */
    for(retry=0; retry<2; retry++)
    {
	rc = 0;
	for(i=0; i<7; i++)
	{
	    rc |= cvmx_twsi_write8(CVMX_RTC_DS1337_ADDR, i, reg[i]);
	}

	sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
	if ((sec & 0xf) == (reg[0] & 0xf))
	    break; /* Time did not roll-over, value is correct */
    }

    return (rc ? -1 : 0);

 ct_invalid:
    return -1;
}

#ifdef CVMX_RTC_DEBUG