diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
-rw-r--r-- | drivers/rtc/rtc-ds1307.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 2c4a65302a9d..47a93c022d91 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c | |||
@@ -31,6 +31,8 @@ enum ds_type { | |||
31 | ds_1338, | 31 | ds_1338, |
32 | ds_1339, | 32 | ds_1339, |
33 | ds_1340, | 33 | ds_1340, |
34 | ds_1388, | ||
35 | ds_3231, | ||
34 | m41t00, | 36 | m41t00, |
35 | rx_8025, | 37 | rx_8025, |
36 | // rs5c372 too? different address... | 38 | // rs5c372 too? different address... |
@@ -66,6 +68,7 @@ enum ds_type { | |||
66 | #define DS1337_REG_CONTROL 0x0e | 68 | #define DS1337_REG_CONTROL 0x0e |
67 | # define DS1337_BIT_nEOSC 0x80 | 69 | # define DS1337_BIT_nEOSC 0x80 |
68 | # define DS1339_BIT_BBSQI 0x20 | 70 | # define DS1339_BIT_BBSQI 0x20 |
71 | # define DS3231_BIT_BBSQW 0x40 /* same as BBSQI */ | ||
69 | # define DS1337_BIT_RS2 0x10 | 72 | # define DS1337_BIT_RS2 0x10 |
70 | # define DS1337_BIT_RS1 0x08 | 73 | # define DS1337_BIT_RS1 0x08 |
71 | # define DS1337_BIT_INTCN 0x04 | 74 | # define DS1337_BIT_INTCN 0x04 |
@@ -94,6 +97,7 @@ enum ds_type { | |||
94 | 97 | ||
95 | 98 | ||
96 | struct ds1307 { | 99 | struct ds1307 { |
100 | u8 offset; /* register's offset */ | ||
97 | u8 regs[11]; | 101 | u8 regs[11]; |
98 | enum ds_type type; | 102 | enum ds_type type; |
99 | unsigned long flags; | 103 | unsigned long flags; |
@@ -128,6 +132,9 @@ static const struct chip_desc chips[] = { | |||
128 | }, | 132 | }, |
129 | [ds_1340] = { | 133 | [ds_1340] = { |
130 | }, | 134 | }, |
135 | [ds_3231] = { | ||
136 | .alarm = 1, | ||
137 | }, | ||
131 | [m41t00] = { | 138 | [m41t00] = { |
132 | }, | 139 | }, |
133 | [rx_8025] = { | 140 | [rx_8025] = { |
@@ -138,7 +145,9 @@ static const struct i2c_device_id ds1307_id[] = { | |||
138 | { "ds1337", ds_1337 }, | 145 | { "ds1337", ds_1337 }, |
139 | { "ds1338", ds_1338 }, | 146 | { "ds1338", ds_1338 }, |
140 | { "ds1339", ds_1339 }, | 147 | { "ds1339", ds_1339 }, |
148 | { "ds1388", ds_1388 }, | ||
141 | { "ds1340", ds_1340 }, | 149 | { "ds1340", ds_1340 }, |
150 | { "ds3231", ds_3231 }, | ||
142 | { "m41t00", m41t00 }, | 151 | { "m41t00", m41t00 }, |
143 | { "rx8025", rx_8025 }, | 152 | { "rx8025", rx_8025 }, |
144 | { } | 153 | { } |
@@ -258,12 +267,7 @@ static void ds1307_work(struct work_struct *work) | |||
258 | control &= ~DS1337_BIT_A1IE; | 267 | control &= ~DS1337_BIT_A1IE; |
259 | i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control); | 268 | i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control); |
260 | 269 | ||
261 | /* rtc_update_irq() assumes that it is called | ||
262 | * from IRQ-disabled context. | ||
263 | */ | ||
264 | local_irq_disable(); | ||
265 | rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF); | 270 | rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF); |
266 | local_irq_enable(); | ||
267 | } | 271 | } |
268 | 272 | ||
269 | out: | 273 | out: |
@@ -291,7 +295,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) | |||
291 | 295 | ||
292 | /* read the RTC date and time registers all at once */ | 296 | /* read the RTC date and time registers all at once */ |
293 | tmp = ds1307->read_block_data(ds1307->client, | 297 | tmp = ds1307->read_block_data(ds1307->client, |
294 | DS1307_REG_SECS, 7, ds1307->regs); | 298 | ds1307->offset, 7, ds1307->regs); |
295 | if (tmp != 7) { | 299 | if (tmp != 7) { |
296 | dev_err(dev, "%s error %d\n", "read", tmp); | 300 | dev_err(dev, "%s error %d\n", "read", tmp); |
297 | return -EIO; | 301 | return -EIO; |
@@ -353,6 +357,7 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) | |||
353 | switch (ds1307->type) { | 357 | switch (ds1307->type) { |
354 | case ds_1337: | 358 | case ds_1337: |
355 | case ds_1339: | 359 | case ds_1339: |
360 | case ds_3231: | ||
356 | buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; | 361 | buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; |
357 | break; | 362 | break; |
358 | case ds_1340: | 363 | case ds_1340: |
@@ -367,7 +372,8 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) | |||
367 | "write", buf[0], buf[1], buf[2], buf[3], | 372 | "write", buf[0], buf[1], buf[2], buf[3], |
368 | buf[4], buf[5], buf[6]); | 373 | buf[4], buf[5], buf[6]); |
369 | 374 | ||
370 | result = ds1307->write_block_data(ds1307->client, 0, 7, buf); | 375 | result = ds1307->write_block_data(ds1307->client, |
376 | ds1307->offset, 7, buf); | ||
371 | if (result < 0) { | 377 | if (result < 0) { |
372 | dev_err(dev, "%s error %d\n", "write", result); | 378 | dev_err(dev, "%s error %d\n", "write", result); |
373 | return result; | 379 | return result; |
@@ -624,6 +630,11 @@ static int __devinit ds1307_probe(struct i2c_client *client, | |||
624 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | 630 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
625 | int want_irq = false; | 631 | int want_irq = false; |
626 | unsigned char *buf; | 632 | unsigned char *buf; |
633 | static const int bbsqi_bitpos[] = { | ||
634 | [ds_1337] = 0, | ||
635 | [ds_1339] = DS1339_BIT_BBSQI, | ||
636 | [ds_3231] = DS3231_BIT_BBSQW, | ||
637 | }; | ||
627 | 638 | ||
628 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA) | 639 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA) |
629 | && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) | 640 | && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) |
@@ -632,9 +643,12 @@ static int __devinit ds1307_probe(struct i2c_client *client, | |||
632 | if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) | 643 | if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) |
633 | return -ENOMEM; | 644 | return -ENOMEM; |
634 | 645 | ||
635 | ds1307->client = client; | ||
636 | i2c_set_clientdata(client, ds1307); | 646 | i2c_set_clientdata(client, ds1307); |
637 | ds1307->type = id->driver_data; | 647 | |
648 | ds1307->client = client; | ||
649 | ds1307->type = id->driver_data; | ||
650 | ds1307->offset = 0; | ||
651 | |||
638 | buf = ds1307->regs; | 652 | buf = ds1307->regs; |
639 | if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { | 653 | if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { |
640 | ds1307->read_block_data = i2c_smbus_read_i2c_block_data; | 654 | ds1307->read_block_data = i2c_smbus_read_i2c_block_data; |
@@ -647,6 +661,7 @@ static int __devinit ds1307_probe(struct i2c_client *client, | |||
647 | switch (ds1307->type) { | 661 | switch (ds1307->type) { |
648 | case ds_1337: | 662 | case ds_1337: |
649 | case ds_1339: | 663 | case ds_1339: |
664 | case ds_3231: | ||
650 | /* has IRQ? */ | 665 | /* has IRQ? */ |
651 | if (ds1307->client->irq > 0 && chip->alarm) { | 666 | if (ds1307->client->irq > 0 && chip->alarm) { |
652 | INIT_WORK(&ds1307->work, ds1307_work); | 667 | INIT_WORK(&ds1307->work, ds1307_work); |
@@ -666,12 +681,12 @@ static int __devinit ds1307_probe(struct i2c_client *client, | |||
666 | ds1307->regs[0] &= ~DS1337_BIT_nEOSC; | 681 | ds1307->regs[0] &= ~DS1337_BIT_nEOSC; |
667 | 682 | ||
668 | /* Using IRQ? Disable the square wave and both alarms. | 683 | /* Using IRQ? Disable the square wave and both alarms. |
669 | * For ds1339, be sure alarms can trigger when we're | 684 | * For some variants, be sure alarms can trigger when we're |
670 | * running on Vbackup (BBSQI); we assume ds1337 will | 685 | * running on Vbackup (BBSQI/BBSQW) |
671 | * ignore that bit | ||
672 | */ | 686 | */ |
673 | if (want_irq) { | 687 | if (want_irq) { |
674 | ds1307->regs[0] |= DS1337_BIT_INTCN | DS1339_BIT_BBSQI; | 688 | ds1307->regs[0] |= DS1337_BIT_INTCN |
689 | | bbsqi_bitpos[ds1307->type]; | ||
675 | ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); | 690 | ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); |
676 | } | 691 | } |
677 | 692 | ||
@@ -751,6 +766,9 @@ static int __devinit ds1307_probe(struct i2c_client *client, | |||
751 | hour); | 766 | hour); |
752 | } | 767 | } |
753 | break; | 768 | break; |
769 | case ds_1388: | ||
770 | ds1307->offset = 1; /* Seconds starts at 1 */ | ||
771 | break; | ||
754 | default: | 772 | default: |
755 | break; | 773 | break; |
756 | } | 774 | } |
@@ -814,6 +832,8 @@ read_rtc: | |||
814 | case rx_8025: | 832 | case rx_8025: |
815 | case ds_1337: | 833 | case ds_1337: |
816 | case ds_1339: | 834 | case ds_1339: |
835 | case ds_1388: | ||
836 | case ds_3231: | ||
817 | break; | 837 | break; |
818 | } | 838 | } |
819 | 839 | ||