Even though RTC-IP is wakeup capable, Not all Boards support it.
For example
The rtc alarm wakeup is available in rtc-ip since omap1 days but alarm
was not wired properly in previous ompa1 boards.
commit fa5b07820fe3a0fc06ac368516e71f10a59b9539
Author: Sekhar Nori <nsekhar@xxxxxx>
Date: Wed Oct 27 15:33:05 2010 -0700
rtc: omap: let device wakeup capability be configured from chip
init logic
The rtc-omap driver currently hardcodes the RTC wakeup
capability to be "not capable". While this seems to be true for
existing OMAP1 boards which are not wired for this, the
DA850/OMAP-L138 SoC, the RTC can always be wake up source from
its "deep sleep" mode.
Current rtc-omap driver expects the rtc module wake-up capabilities to
be set up by board specific code. However, in case of DT, this is not
possible.
So, add a DT property "ti,wakeup_capable" to indicate that the module is
wake-up capable.
Signed-off-by: Hebbar Gururaja <gururaja.hebbar@xxxxxx>
---
:100644 100644 b47aa41... 108a629... M Documentation/devicetree/bindings/rtc/rtc-omap.txt
:100644 100644 b0ba3fc... 000a02f... M drivers/rtc/rtc-omap.c
Documentation/devicetree/bindings/rtc/rtc-omap.txt | 4 ++++
drivers/rtc/rtc-omap.c | 5 +++++
2 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
index b47aa41..108a629 100644
--- a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
@@ -6,6 +6,10 @@ Required properties:
- interrupts: rtc timer, alarm interrupts in order
- interrupt-parent: phandle for the interrupt controller
+Optional properties:
+- ti,wakeup_capable: Inform the rtc driver that this module is wake-up
+ capable so that rtcwake and suspend tests can work.
+
Example:
rtc@1c23000 {
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index b0ba3fc..000a02f 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -423,6 +423,11 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
* is write-only, and always reads as zero...)
*/
+ /* Fixup wakeup-enable feature based on the device tree */
+ if (of_id && of_find_property(pdev->dev.of_node,
+ "ti,wakeup_capable", NULL))
+ device_init_wakeup(&pdev->dev, 1);
+
if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
pr_info("%s: split power mode\n", pdev->name);
--
1.7.9.5
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