From: David Lowe <dave-lowe@ntlworld.com>
Date: Sat, 22 Apr 2017 18:28:00 +0100
Subject: rtc: rtc-ds1307: enable support for mcp794xx as a wakeup source
without IRQ
Git-commit: 8066360744743fb7f2dee1e2041fc9fc92f9d6b5
Patch-mainline: v4.13-rc1
References: fate#326530,fate#326531,fate#326535,fate#326538,fate#326539
This patch extends the fixes for ds1337, ds1339, ds3231 in commit
8bc2a40730ec ("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>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/rtc/rtc-ds1307.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 94e13d703735..a264938500af 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -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;
}
--
2.11.0