rtc: omap: dt support

Enhance rtc-omap driver with DT capability

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 35 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
new file mode 100644
index 000000000000..b47aa415c820
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
@@ -0,0 +1,17 @@
+TI Real Time Clock
+
+Required properties:
+- compatible: "ti,da830-rtc"
+- reg: Address range of rtc register set
+- interrupts: rtc timer, alarm interrupts in order
+- interrupt-parent: phandle for the interrupt controller
+
+Example:
+
+rtc@1c23000 {
+        compatible = "ti,da830-rtc";
+        reg = <0x23000 0x1000>;
+        interrupts = <19
+                      19>;
+        interrupt-parent = <&intc>;
+};
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index d948426283db..dff9ff476b0d 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -20,6 +20,8 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <asm/io.h>
 
@@ -298,6 +300,8 @@ static struct rtc_class_ops omap_rtc_ops = {
 static int omap_rtc_alarm;
 static int omap_rtc_timer;
 
+#define OMAP_RTC_DATA_DA830_IDX 1
+
 static struct platform_device_id omap_rtc_devtype[] = {
         {
                 .name   = DRIVER_NAME,
@@ -309,12 +313,25 @@ static struct platform_device_id omap_rtc_devtype[] = {
 };
 MODULE_DEVICE_TABLE(platform, omap_rtc_devtype);
 
+static const struct of_device_id omap_rtc_of_match[] = {
+        {       .compatible     = "ti,da830-rtc",
+                .data           = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX],
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
+
 static int __init omap_rtc_probe(struct platform_device *pdev)
 {
         struct resource         *res, *mem;
         struct rtc_device       *rtc;
         u8                      reg, new_ctrl;
         const struct platform_device_id *id_entry;
+        const struct of_device_id *of_id;
+
+        of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
+        if (of_id)
+                pdev->id_entry = of_id->data;
 
         omap_rtc_timer = platform_get_irq(pdev, 0);
         if (omap_rtc_timer <= 0) {
@@ -510,6 +527,7 @@ static struct platform_driver omap_rtc_driver = {
         .driver         = {
                 .name   = DRIVER_NAME,
                 .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(omap_rtc_of_match),
         },
         .id_table       = omap_rtc_devtype,
 };