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rtc: rtc-ds1307: enable support for mcp794xx as a wakeup source without IRQ

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This patch extends the fixes for ds1337, ds1339, ds3231 in commit
8bc2a40730 ("rtc: ds1307: add support for the DT property
'wakeup-source'") to mcp794xx devices, so that those parts can similarly be
used as a wakeup source without an IRQ to the processor.

Tested on Raspberry Pi ZeroW with MCP79400.

Signed-off-by: David Lowe <dave-lowe@ntlworld.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
David Lowe 2017-04-22 18:28:00 +01:00 committed by Alexandre Belloni
parent 11e5890b53
commit 8066360744
1 changed files with 2 additions and 1 deletions
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3
drivers/rtc/rtc-ds1307.c
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@ -1407,7 +1407,8 @@ static int ds1307_probe(struct i2c_client *client,
break;
case mcp794xx:
rtc_ops = &mcp794xx_rtc_ops;
if (ds1307->irq > 0 && chip->alarm) {
if (chip->alarm && (ds1307->irq > 0 ||
ds1307_can_wakeup_device)) {
irq_handler = mcp794xx_irq;
want_irq = true;
}