watchdog: imx2_wdt: add device tree probe support

Adds device tree probe support for imx2_wdt driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
new file mode 100644 (file)
index 0000000..2144af1
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
@@ -0,0 +1,14 @@
+* Freescale i.MX Watchdog Timer (WDT) Controller
+
+Required properties:
+- compatible : Should be "fsl,<soc>-wdt"
+- reg : Should contain WDT registers location and length
+- interrupts : Should contain WDT interrupt
+
+Examples:
+
+wdt@73f98000 {
+       compatible = "fsl,imx51-wdt", "fsl,imx21-wdt";
+       reg = <0x73f98000 0x4000>;
+       interrupts = <58>;
+};

diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 86f7cac..b8ef2c6 100644 (file)
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -329,12 +329,18 @@ static void imx2_wdt_shutdown(struct platform_device *pdev)
        }
 }
 
+static const struct of_device_id imx2_wdt_dt_ids[] = {
+       { .compatible = "fsl,imx21-wdt", },
+       { /* sentinel */ }
+};
+
 static struct platform_driver imx2_wdt_driver = {
        .remove         = __exit_p(imx2_wdt_remove),
        .shutdown       = imx2_wdt_shutdown,
        .driver         = {
                .name   = DRIVER_NAME,
                .owner  = THIS_MODULE,
+               .of_match_table = imx2_wdt_dt_ids,
        },
 };