Enhance rtc-omap driver with DT capability
Signed-off-by: Afzal Mohammed <af...@ti.com>
---
v2:
Use compatible as ti,da830-rtc instead of ti,am1808-rtc
Documentation/devicetree/bindings/rtc/rtc-omap.txt | 20 ++++++++++++++++++++
drivers/rtc/rtc-omap.c | 18 ++++++++++++++++++
2 files changed, 38 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/rtc/rtc-omap.txt
diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
new file mode 100644
index 0000000..8c5c584
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
@@ -0,0 +1,20 @@
+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
+
+Alternative for reg and interrupt properties on OMAP:
+- ti,hwmods: Name of the hwmod associated to the RTC
+
+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 8afbc2e..dc1a4da 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,
@@ -308,12 +312,25 @@ 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) {
@@ -509,6 +526,7 @@ 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,
};
--
1.7.1
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