[PATCH v3] rtc: stmp3xxx: Add simple binding for the stmp3xxx-rtc

[Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]

From: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>

Signed-off-by: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>
Cc: Alessandro Zummo <a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
Acked-by: Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
Changes since v2:

* Back out the dts changes from the patch, so that it could be merged
  through rtc tree if that's the case.

* The first interrupt has to be rtc alarm interrupt, and that's the
  only one that driver tries to get.  Fix binding document for that.

 .../devicetree/bindings/rtc/stmp3xxx-rtc.txt       |   16 ++++++++++++++++
 drivers/rtc/rtc-stmp3xxx.c                         |    8 ++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt

diff --git a/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt b/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt
new file mode 100644
index 0000000..b800070
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt
@@ -0,0 +1,16 @@
+* STMP3xxx/i.MX28 Time Clock controller
+
+Required properties:
+- compatible: should be one of the following.
+    * "fsl,stmp3xxx-rtc"
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- interrupts: rtc alarm interrupt
+
+Example:
+
+rtc@80056000 {
+	compatible = "fsl,imx28-rtc", "fsl,stmp3xxx-rtc";
+	reg = <0x80056000 2000>;
+	interrupts = <29>;
+};
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 1028786..739ef556 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -25,6 +25,7 @@
 #include <linux/interrupt.h>
 #include <linux/rtc.h>
 #include <linux/slab.h>
+#include <linux/of_device.h>
 
 #include <mach/common.h>
 
@@ -265,6 +266,12 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
 #define stmp3xxx_rtc_resume	NULL
 #endif
 
+static const struct of_device_id rtc_dt_ids[] = {
+	{ .compatible = "fsl,stmp3xxx-rtc", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rtc_dt_ids);
+
 static struct platform_driver stmp3xxx_rtcdrv = {
 	.probe		= stmp3xxx_rtc_probe,
 	.remove		= stmp3xxx_rtc_remove,
@@ -273,6 +280,7 @@ static struct platform_driver stmp3xxx_rtcdrv = {
 	.driver		= {
 		.name	= "stmp3xxx-rtc",
 		.owner	= THIS_MODULE,
+		.of_match_table = rtc_dt_ids,
 	},
 };
 
-- 
1.7.5.4