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watchdog: at91sam9_wdt: add device tree support

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Tested on an at91sam9260 board (evk-pro3)

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Fabio Porcedda 2012-11-12 09:37:25 +01:00 committed by Nicolas Ferre
parent 8cf70f3dc0
commit be49bbae13
2 changed files with 26 additions and 0 deletions
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15
Documentation/devicetree/bindings/watchdog/atmel-wdt.txt Normal file
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@ -0,0 +1,15 @@
* Atmel Watchdog Timers
** at91sam9-wdt
Required properties:
- compatible: must be "atmel,at91sam9260-wdt".
- reg: physical base address of the controller and length of memory mapped
region.
Example:
watchdog@fffffd40 {
compatible = "atmel,at91sam9260-wdt";
reg = <0xfffffd40 0x10>;
};

11
drivers/watchdog/at91sam9_wdt.c
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@ -32,6 +32,7 @@
#include <linux/timer.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/of.h>
#include "at91sam9_wdt.h"
@ -302,11 +303,21 @@ static int __exit at91wdt_remove(struct platform_device *pdev)
return res;
}
#if defined(CONFIG_OF)
static const struct of_device_id at91_wdt_dt_ids[] __initconst = {
{ .compatible = "atmel,at91sam9260-wdt" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, at91_wdt_dt_ids);
#endif
static struct platform_driver at91wdt_driver = {
.remove = __exit_p(at91wdt_remove),
.driver = {
.name = "at91_wdt",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(at91_wdt_dt_ids),
},
};