Hi,
this patch change the initialization of ds1340 according to the FIXME.
It was tested on a arm custom board, this is the log when I plug the
board without backup battery.
Linux version 2.6.24-rc7 ([EMAIL PROTECTED]) (gcc version 3.4.6) #22 Tue
Jan 15 19:45:16 CET 2008
.......
Kernel command line: debug
.......
atmel_spi atmel_spi.1: Atmel SPI Controller at 0xfffcc000 (irq 13)
i2c /dev entries driver
rtc-ds1307 0-0068: SET TIME!
rtc-ds1307 0-0068: rtc core: registered ds1340 as rtc0
i2c-gpio i2c-gpio: using pins 55 (SDA) and 56 (SCL)
.......
If you have any comments please CC me
bye.
Signed-off-by: Frederic RODO <[EMAIL PROTECTED]>
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index bc1c7fe..3a86898 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -392,6 +392,33 @@ static int __devinit ds1307_probe(struct i2c_client
*client)
dev_warn(&client->dev, "SET TIME!\n");
}
break;
+ case ds_1340:
+ /* Test nEOSC before OSF */
+ tmp = i2c_smbus_read_byte_data(client, DS1307_REG_SECS);
+ if (tmp < 0) {
+ pr_debug("read error %d\n", tmp);
+ err = -EIO;
+ goto exit_free;
+ }
+
+ /* oscillator off? turn it on, so clock can tick. */
+ if (tmp & DS1340_BIT_nEOSC)
+ i2c_smbus_write_byte_data(client, DS1307_REG_SECS,
+ tmp & ~DS1340_BIT_nEOSC);
+
+ tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG);
+ if (tmp < 0) {
+ pr_debug("read error %d\n", tmp);
+ err = -EIO;
+ goto exit_free;
+ }
+
+ /* oscillator fault? clear flag, and warn */
+ if (tmp & DS1340_BIT_OSF) {
+ i2c_smbus_write_byte_data(client, DS1340_REG_FLAG, 0);
+ dev_warn(&client->dev, "SET TIME!\n");
+ }
+ break;
default:
break;
}
@@ -412,11 +439,6 @@ read_rtc:
*/
tmp = ds1307->regs[DS1307_REG_SECS];
switch (ds1307->type) {
- case ds_1340:
- /* FIXME read register with DS1340_BIT_OSF, use that to
- * trigger the "set time" warning (*after* restarting the
- * oscillator!) instead of this weaker ds1307/m41t00 test.
- */
case ds_1307:
case m41t00:
/* clock halted? turn it on, so clock can tick. */
@@ -442,6 +464,7 @@ read_rtc:
break;
case ds_1337:
case ds_1339:
+ case ds_1340:
break;
}
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