Commit 8dd6803d authored by Heiko Schocher's avatar Heiko Schocher Committed by Tom Rini

rtc: ds1307: add support for m41t11

add m41t11 support in ds1307 driver. changes:

- add compatible string for m41t11
- check if RTC clock is running, if not
  enable the clock
Signed-off-by: default avatarHeiko Schocher <hs@denx.de>
parent d66fb5b1
......@@ -23,6 +23,7 @@ enum ds_type {
ds_1307,
ds_1337,
ds_1340,
m41t11,
mcp794xx,
};
......@@ -260,6 +261,18 @@ read_rtc:
}
}
if (type == m41t11) {
/* clock halted? turn it on, so clock can tick. */
if (buf[RTC_SEC_REG_ADDR] & RTC_SEC_BIT_CH) {
buf[RTC_SEC_REG_ADDR] &= ~RTC_SEC_BIT_CH;
dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
MCP7941X_BIT_ST);
dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
buf[RTC_SEC_REG_ADDR]);
goto read_rtc;
}
}
if (type == mcp794xx) {
/* make sure that the backup battery is enabled */
if (!(buf[RTC_DAY_REG_ADDR] & MCP7941X_BIT_VBATEN)) {
......@@ -332,6 +345,7 @@ static const struct udevice_id ds1307_rtc_ids[] = {
{ .compatible = "dallas,ds1337", .data = ds_1337 },
{ .compatible = "dallas,ds1340", .data = ds_1340 },
{ .compatible = "microchip,mcp7941x", .data = mcp794xx },
{ .compatible = "st,m41t11", .data = m41t11 },
{ }
};
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment