diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 54 |
1 files changed, 49 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 8e1c5cb6ece6..4e31036ee259 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -186,6 +186,7 @@ static const struct i2c_device_id ds1307_id[] = { { "mcp7941x", mcp794xx }, { "pt7c4338", ds_1307 }, { "rx8025", rx_8025 }, + { "isl12057", ds_1337 }, { } }; MODULE_DEVICE_TABLE(i2c, ds1307_id); @@ -382,10 +383,25 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) t->tm_mday = bcd2bin(ds1307->regs[DS1307_REG_MDAY] & 0x3f); tmp = ds1307->regs[DS1307_REG_MONTH] & 0x1f; t->tm_mon = bcd2bin(tmp) - 1; - - /* assume 20YY not 19YY, and ignore DS1337_BIT_CENTURY */ t->tm_year = bcd2bin(ds1307->regs[DS1307_REG_YEAR]) + 100; +#ifdef CONFIG_RTC_DRV_DS1307_CENTURY + switch (ds1307->type) { + case ds_1337: + case ds_1339: + case ds_3231: + if (ds1307->regs[DS1307_REG_MONTH] & DS1337_BIT_CENTURY) + t->tm_year += 100; + break; + case ds_1340: + if (ds1307->regs[DS1307_REG_HOUR] & DS1340_BIT_CENTURY) + t->tm_year += 100; + break; + default: + break; + } +#endif + dev_dbg(dev, "%s secs=%d, mins=%d, " "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", "read", t->tm_sec, t->tm_min, @@ -409,6 +425,27 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) t->tm_hour, t->tm_mday, t->tm_mon, t->tm_year, t->tm_wday); +#ifdef CONFIG_RTC_DRV_DS1307_CENTURY + if (t->tm_year < 100) + return -EINVAL; + + switch (ds1307->type) { + case ds_1337: + case ds_1339: + case ds_3231: + case ds_1340: + if (t->tm_year > 299) + return -EINVAL; + default: + if (t->tm_year > 199) + return -EINVAL; + break; + } +#else + if (t->tm_year < 100 || t->tm_year > 199) + return -EINVAL; +#endif + buf[DS1307_REG_SECS] = bin2bcd(t->tm_sec); buf[DS1307_REG_MIN] = bin2bcd(t->tm_min); buf[DS1307_REG_HOUR] = bin2bcd(t->tm_hour); @@ -424,11 +461,13 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) case ds_1337: case ds_1339: case ds_3231: - buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; + if (t->tm_year > 199) + buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; break; case ds_1340: - buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN - | DS1340_BIT_CENTURY; + buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN; + if (t->tm_year > 199) + buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY; break; case mcp794xx: /* @@ -1295,6 +1334,11 @@ static int ds1307_probe(struct i2c_client *client, if (of_property_read_bool(client->dev.of_node, "wakeup-source")) { ds1307_can_wakeup_device = true; } + /* Intersil ISL12057 DT backward compatibility */ + if (of_property_read_bool(client->dev.of_node, + "isil,irq2-can-wakeup-machine")) { + ds1307_can_wakeup_device = true; + } #endif switch (ds1307->type) { |