1 files changed, 15 insertions, 4 deletions

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 2c4a65302a9d..52e2427e5a95 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -31,6 +31,7 @@ enum ds_type {
         ds_1338,
         ds_1339,
         ds_1340,
+        ds_1388,
         m41t00,
         rx_8025,
         // rs5c372 too?  different address...
@@ -94,6 +95,7 @@ enum ds_type {
 
 
 struct ds1307 {
+        u8                      offset; /* register's offset */
         u8                      regs[11];
         enum ds_type            type;
         unsigned long           flags;
@@ -138,6 +140,7 @@ static const struct i2c_device_id ds1307_id[] = {
         { "ds1337", ds_1337 },
         { "ds1338", ds_1338 },
         { "ds1339", ds_1339 },
+        { "ds1388", ds_1388 },
         { "ds1340", ds_1340 },
         { "m41t00", m41t00 },
         { "rx8025", rx_8025 },
@@ -291,7 +294,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
 
         /* read the RTC date and time registers all at once */
         tmp = ds1307->read_block_data(ds1307->client,
-                DS1307_REG_SECS, 7, ds1307->regs);
+                ds1307->offset, 7, ds1307->regs);
         if (tmp != 7) {
                 dev_err(dev, "%s error %d\n", "read", tmp);
                 return -EIO;
@@ -367,7 +370,8 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
                 "write", buf[0], buf[1], buf[2], buf[3],
                 buf[4], buf[5], buf[6]);
 
-        result = ds1307->write_block_data(ds1307->client, 0, 7, buf);
+        result = ds1307->write_block_data(ds1307->client,
+                ds1307->offset, 7, buf);
         if (result < 0) {
                 dev_err(dev, "%s error %d\n", "write", result);
                 return result;
@@ -632,9 +636,12 @@ static int __devinit ds1307_probe(struct i2c_client *client,
         if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL)))
                 return -ENOMEM;
 
-        ds1307->client = client;
         i2c_set_clientdata(client, ds1307);
-        ds1307->type = id->driver_data;
+
+        ds1307->client  = client;
+        ds1307->type    = id->driver_data;
+        ds1307->offset  = 0;
+
         buf = ds1307->regs;
         if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
                 ds1307->read_block_data = i2c_smbus_read_i2c_block_data;
@@ -751,6 +758,9 @@ static int __devinit ds1307_probe(struct i2c_client *client,
                                                   hour);
                 }
                 break;
+        case ds_1388:
+                ds1307->offset = 1; /* Seconds starts at 1 */
+                break;
         default:
                 break;
         }
@@ -814,6 +824,7 @@ read_rtc:
         case rx_8025:
         case ds_1337:
         case ds_1339:
+        case ds_1388:
                 break;
         }