rtc: stmp3xxx: Add simple binding for the stmp3xxx-rtc

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: rtc-linux@googlegroups.com
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

2 files changed, 24 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt b/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt
new file mode 100644
index 000000000000..b800070fe6e9
--- /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 10287865e330..739ef55694f4 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,
         },
 };