diff options
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 73 |
1 files changed, 27 insertions, 46 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 9b4106a7e8e4..922675281b7a 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -136,6 +136,9 @@ struct chip_desc { unsigned alarm:1; u16 nvram_offset; u16 nvram_size; + u8 century_reg; + u8 century_enable_bit; + u8 century_bit; u16 trickle_charger_reg; u8 trickle_charger_setup; u8 (*do_trickle_setup)(struct ds1307 *, uint32_t, @@ -151,6 +154,8 @@ static struct chip_desc chips[last_ds_type] = { }, [ds_1337] = { .alarm = 1, + .century_reg = DS1307_REG_MONTH, + .century_bit = DS1337_BIT_CENTURY, }, [ds_1338] = { .nvram_offset = 8, @@ -158,10 +163,15 @@ static struct chip_desc chips[last_ds_type] = { }, [ds_1339] = { .alarm = 1, + .century_reg = DS1307_REG_MONTH, + .century_bit = DS1337_BIT_CENTURY, .trickle_charger_reg = 0x10, .do_trickle_setup = &do_trickle_setup_ds1339, }, [ds_1340] = { + .century_reg = DS1307_REG_HOUR, + .century_enable_bit = DS1340_BIT_CENTURY_EN, + .century_bit = DS1340_BIT_CENTURY, .trickle_charger_reg = 0x08, }, [ds_1388] = { @@ -169,6 +179,8 @@ static struct chip_desc chips[last_ds_type] = { }, [ds_3231] = { .alarm = 1, + .century_reg = DS1307_REG_MONTH, + .century_bit = DS1337_BIT_CENTURY, }, [rx_8130] = { .alarm = 1, @@ -328,6 +340,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) { struct ds1307 *ds1307 = dev_get_drvdata(dev); int tmp, ret; + const struct chip_desc *chip = &chips[ds1307->type]; /* read the RTC date and time registers all at once */ ret = regmap_bulk_read(ds1307->regmap, ds1307->offset, ds1307->regs, 7); @@ -355,22 +368,9 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) t->tm_mon = bcd2bin(tmp) - 1; 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 + if (ds1307->regs[chip->century_reg] & chip->century_bit && + IS_ENABLED(CONFIG_RTC_DRV_DS1307_CENTURY)) + t->tm_year += 100; dev_dbg(dev, "%s secs=%d, mins=%d, " "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", @@ -385,6 +385,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) static int ds1307_set_time(struct device *dev, struct rtc_time *t) { struct ds1307 *ds1307 = dev_get_drvdata(dev); + const struct chip_desc *chip = &chips[ds1307->type]; int result; int tmp; u8 *buf = ds1307->regs; @@ -395,24 +396,14 @@ 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; - } +#ifdef CONFIG_RTC_DRV_DS1307_CENTURY + if (t->tm_year > (chip->century_bit ? 299 : 199)) + return -EINVAL; #else - if (t->tm_year < 100 || t->tm_year > 199) + if (t->tm_year > 199) return -EINVAL; #endif @@ -427,19 +418,12 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) tmp = t->tm_year - 100; buf[DS1307_REG_YEAR] = bin2bcd(tmp); - switch (ds1307->type) { - case ds_1337: - case ds_1339: - case ds_3231: - if (t->tm_year > 199) - buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; - break; - case ds_1340: - buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN; - if (t->tm_year > 199) - buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY; - break; - case mcp794xx: + if (chip->century_enable_bit) + buf[chip->century_reg] |= chip->century_enable_bit; + if (t->tm_year > 199 && chip->century_bit) + buf[chip->century_reg] |= chip->century_bit; + + if (ds1307->type == mcp794xx) { /* * these bits were cleared when preparing the date/time * values and need to be set again before writing the @@ -447,9 +431,6 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) */ buf[DS1307_REG_SECS] |= MCP794XX_BIT_ST; buf[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN; - break; - default: - break; } dev_dbg(dev, "%s: %7ph\n", "write", buf); |