diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index c293d0cdb104..836710ce750e 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -17,8 +17,7 @@ #include <linux/string.h> #include <linux/rtc.h> #include <linux/bcd.h> - - +#include <linux/rtc/ds1307.h> /* * We can't determine type by probing, but if we expect pre-Linux code @@ -92,7 +91,8 @@ enum ds_type { # define DS1337_BIT_A2I 0x02 # define DS1337_BIT_A1I 0x01 #define DS1339_REG_ALARM1_SECS 0x07 -#define DS1339_REG_TRICKLE 0x10 + +#define DS13XX_TRICKLE_CHARGER_MAGIC 0xa0 #define RX8025_REG_CTRL1 0x0e # define RX8025_BIT_2412 0x20 @@ -124,6 +124,7 @@ struct chip_desc { unsigned alarm:1; u16 nvram_offset; u16 nvram_size; + u16 trickle_charger_reg; }; static const struct chip_desc chips[last_ds_type] = { @@ -140,6 +141,13 @@ static const struct chip_desc chips[last_ds_type] = { }, [ds_1339] = { .alarm = 1, + .trickle_charger_reg = 0x10, + }, + [ds_1340] = { + .trickle_charger_reg = 0x08, + }, + [ds_1388] = { + .trickle_charger_reg = 0x0a, }, [ds_3231] = { .alarm = 1, @@ -619,6 +627,7 @@ static int __devinit ds1307_probe(struct i2c_client *client, struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); int want_irq = false; unsigned char *buf; + struct ds1307_platform_data *pdata = client->dev.platform_data; static const int bbsqi_bitpos[] = { [ds_1337] = 0, [ds_1339] = DS1339_BIT_BBSQI, @@ -637,7 +646,10 @@ static int __devinit ds1307_probe(struct i2c_client *client, ds1307->client = client; ds1307->type = id->driver_data; - ds1307->offset = 0; + + if (pdata && pdata->trickle_charger_setup && chip->trickle_charger_reg) + i2c_smbus_write_byte_data(client, chip->trickle_charger_reg, + DS13XX_TRICKLE_CHARGER_MAGIC | pdata->trickle_charger_setup); buf = ds1307->regs; if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { |