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rtc: rtc-s3c: Add device tree support 

Add device tree based discovery support for Samsung's rtc controller.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Thomas Abraham 2011-10-24 14:49:04 +02:00 committed by Kukjin Kim
parent b3d6ac3e5f
commit 39ce4084a6
2 changed files with 40 additions and 1 deletions
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20
Documentation/devicetree/bindings/rtc/s3c-rtc.txt Normal file
View File

@ -0,0 +1,20 @@
* Samsung's S3C Real Time Clock controller
Required properties:
- compatible: should be one of the following.
* "samsung,s3c2410-rtc" - for controllers compatible with s3c2410 rtc.
* "samsung,s3c6410-rtc" - for controllers compatible with s3c6410 rtc.
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: Two interrupt numbers to the cpu should be specified. First
interrupt number is the rtc alarm interupt and second interrupt number
is the rtc tick interrupt. The number of cells representing a interrupt
depends on the parent interrupt controller.
Example:
rtc@10070000 {
compatible = "samsung,s3c6410-rtc";
reg = <0x10070000 0x100>;
interrupts = <44 0 45 0>;
};

21
drivers/rtc/rtc-s3c.c
View File

@ -25,6 +25,7 @@
#include <linux/clk.h>
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <mach/hardware.h>
#include <asm/uaccess.h>
@ -507,7 +508,13 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
goto err_nortc;
}
s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
#ifdef CONFIG_OF
if (pdev->dev.of_node)
s3c_rtc_cpu_type = of_device_is_compatible(pdev->dev.of_node,
"samsung,s3c6410-rtc") ? TYPE_S3C64XX : TYPE_S3C2410;
else
#endif
s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
/* Check RTC Time */
@ -629,6 +636,17 @@ static int s3c_rtc_resume(struct platform_device *pdev)
#define s3c_rtc_resume NULL
#endif
#ifdef CONFIG_OF
static const struct of_device_id s3c_rtc_dt_match[] = {
{ .compatible = "samsung,s3c2410-rtc" },
{ .compatible = "samsung,s3c6410-rtc" },
{},
};
MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
#else
#define s3c_rtc_dt_match NULL
#endif
static struct platform_device_id s3c_rtc_driver_ids[] = {
{
.name = "s3c2410-rtc",
@ -651,6 +669,7 @@ static struct platform_driver s3c_rtc_driver = {
.driver = {
.name = "s3c-rtc",
.owner = THIS_MODULE,
.of_match_table = s3c_rtc_dt_match,
},
};