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rtc: ds1307: Remove legacy non-DM code

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The DS1307 driver depends on DM_RTC since commit d425d6056e01 ("rtc: Add
DM support to ds1307"), remove the related obsolete code.

Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Francesco Dolcini 2026-04-24 10:45:44 +02:00 committed by Tom Rini
parent 8ef8dee4f3
commit b5633dddbd
1 changed files with 0 additions and 152 deletions
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152
drivers/rtc/ds1307.c
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@ -68,157 +68,6 @@ enum ds_type {
#define MCP7941X_BIT_ST 0x80
#define MCP7941X_BIT_VBATEN 0x08
#ifndef CONFIG_DM_RTC
/*---------------------------------------------------------------------*/
#undef DEBUG_RTC
#ifdef DEBUG_RTC
#define DEBUGR(fmt, args...) printf(fmt, ##args)
#else
#define DEBUGR(fmt, args...)
#endif
/*---------------------------------------------------------------------*/
#ifndef CFG_SYS_I2C_RTC_ADDR
# define CFG_SYS_I2C_RTC_ADDR 0x68
#endif
#if defined(CONFIG_RTC_DS1307) && (CONFIG_SYS_I2C_SPEED > 100000)
# error The DS1307 is specified only up to 100kHz!
#endif
static uchar rtc_read (uchar reg);
static void rtc_write (uchar reg, uchar val);
/*
* Get the current time from the RTC
*/
int rtc_get (struct rtc_time *tmp)
{
int rel = 0;
uchar sec, min, hour, mday, wday, mon, year;
#ifdef CONFIG_RTC_MCP79411
read_rtc:
#endif
sec = rtc_read (RTC_SEC_REG_ADDR);
min = rtc_read (RTC_MIN_REG_ADDR);
hour = rtc_read (RTC_HR_REG_ADDR);
wday = rtc_read (RTC_DAY_REG_ADDR);
mday = rtc_read (RTC_DATE_REG_ADDR);
mon = rtc_read (RTC_MON_REG_ADDR);
year = rtc_read (RTC_YR_REG_ADDR);
DEBUGR ("Get RTC year: %02x mon: %02x mday: %02x wday: %02x "
"hr: %02x min: %02x sec: %02x\n",
year, mon, mday, wday, hour, min, sec);
#ifdef CONFIG_RTC_DS1307
if (sec & RTC_SEC_BIT_CH) {
printf ("### Warning: RTC oscillator has stopped\n");
/* clear the CH flag */
rtc_write (RTC_SEC_REG_ADDR,
rtc_read (RTC_SEC_REG_ADDR) & ~RTC_SEC_BIT_CH);
rel = -1;
}
#endif
#ifdef CONFIG_RTC_MCP79411
/* make sure that the backup battery is enabled */
if (!(wday & MCP7941X_BIT_VBATEN)) {
rtc_write(RTC_DAY_REG_ADDR,
wday | MCP7941X_BIT_VBATEN);
}
/* clock halted? turn it on, so clock can tick. */
if (!(sec & MCP7941X_BIT_ST)) {
rtc_write(RTC_SEC_REG_ADDR, MCP7941X_BIT_ST);
printf("Started RTC\n");
goto read_rtc;
}
#endif
tmp->tm_sec = bcd2bin (sec & 0x7F);
tmp->tm_min = bcd2bin (min & 0x7F);
tmp->tm_hour = bcd2bin (hour & 0x3F);
tmp->tm_mday = bcd2bin (mday & 0x3F);
tmp->tm_mon = bcd2bin (mon & 0x1F);
tmp->tm_year = bcd2bin (year) + ( bcd2bin (year) >= 70 ? 1900 : 2000);
tmp->tm_wday = bcd2bin ((wday - 1) & 0x07);
tmp->tm_yday = 0;
tmp->tm_isdst= 0;
DEBUGR ("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
return rel;
}
/*
* Set the RTC
*/
int rtc_set (struct rtc_time *tmp)
{
DEBUGR ("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
if (tmp->tm_year < 1970 || tmp->tm_year > 2069)
printf("WARNING: year should be between 1970 and 2069!\n");
rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100));
rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon));
#ifdef CONFIG_RTC_MCP79411
rtc_write (RTC_DAY_REG_ADDR,
bin2bcd (tmp->tm_wday + 1) | MCP7941X_BIT_VBATEN);
#else
rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1));
#endif
rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday));
rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
#ifdef CONFIG_RTC_MCP79411
rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec) | MCP7941X_BIT_ST);
#else
rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));
#endif
return 0;
}
/*
* Reset the RTC. We setting the date back to 1970-01-01.
* We also enable the oscillator output on the SQW/OUT pin and program
* it for 32,768 Hz output. Note that according to the datasheet, turning
* on the square wave output increases the current drain on the backup
* battery to something between 480nA and 800nA.
*/
void rtc_reset (void)
{
rtc_write (RTC_SEC_REG_ADDR, 0x00); /* clearing Clock Halt */
rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_SQWE | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS0);
}
/*
* Helper functions
*/
static
uchar rtc_read (uchar reg)
{
return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
}
static void rtc_write (uchar reg, uchar val)
{
i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
}
#endif /* !CONFIG_DM_RTC */
#ifdef CONFIG_DM_RTC
static int ds1307_rtc_set(struct udevice *dev, const struct rtc_time *tm)
{
int ret;
@ -366,4 +215,3 @@ U_BOOT_DRIVER(rtc_ds1307) = {
.of_match = ds1307_rtc_ids,
.ops = &ds1307_rtc_ops,
};
#endif /* CONFIG_DM_RTC */