watchdog: at91sam9_wdt: add device tree support

Hi all,

This patchset is for adding device tree support to the at91sam9_wdt driver.

The "timeout-sec" binding is added by another patchset already sent:
[PATCH v4 0/8] watchdog: dt: add support for the timeout-sec dt property

Changes:
v9:
- rebased over v3.7-rc1
v8:
- add __initconst to at91_wdt_dt_ids
v7:
- split the patchset
- remove timeout binding
v6:
- add watchdog core proprty timeout binding
- add as example to the orion_wdt driver the new timeout binding
v5:
- split dts commit in two, one for socs and one for boards.
v4:
- use "atmel,at91sam9260-wdt" as compatible
v3:
- add heartbeat option
- default disabled for all the soc, enable only for evk-pro3 board
- add at91sam9263 and at91sam9g45 soc
v2:
- add missing to and cc addresses

Based on v3.7-rc5

Fabio Porcedda (3):
watchdog: at91sam9_wdt: add device tree support
ARM: at91/dts: add at91sam9_wdt driver to at91sam926x, at91sam9g45
ARM: at91/dts: evk-pro3: enable watchdog

 Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 15 +++++++++++++++
 arch/arm/boot/dts/at91sam9260.dtsi                       |  6 ++++++
 arch/arm/boot/dts/at91sam9263.dtsi                       |  6 ++++++
 arch/arm/boot/dts/at91sam9g45.dtsi                       |  6 ++++++
 arch/arm/boot/dts/evk-pro3.dts                           |  4 ++++
 drivers/watchdog/at91sam9_wdt.c                          | 11 +++++++++++
 6 files changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/atmel-wdt.txt

1.8.0

Tested on an at91sam9260 board (evk-pro3)

---
 Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 15 +++++++++++++++
 drivers/watchdog/at91sam9_wdt.c                          | 11 +++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/atmel-wdt.txt

new file mode 100644
index 0000000..2957ebb
@@ -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 at fffffd40 {
+		compatible = "atmel,at91sam9260-wdt";
+		reg = <0xfffffd40 0x10>;
+	};

index 05e1be8..dc42e44 100644
@@ -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),
 	},
 };
 

1.8.0

On 11/12/2012 09:37 AM, Fabio Porcedda :

(and to the whole patch series actually)

Wim, can you tell me if it is possible to merge this part through arm-soc git tree with the rest of material for AT91? If yes, I would need your Acked-by...

Thanks, best regards,

Nicolas Ferre

Tested on an at91sam9260 board (evk-pro3).

---
 arch/arm/boot/dts/at91sam9260.dtsi | 6 ++++++
 arch/arm/boot/dts/at91sam9263.dtsi | 6 ++++++
 arch/arm/boot/dts/at91sam9g45.dtsi | 6 ++++++
 3 files changed, 18 insertions(+)

index d410581..bfb5bb6 100644
@@ -246,6 +246,12 @@
 					trigger-external;
 				};
 			};
+
+			watchdog at fffffd40 {
+				compatible = "atmel,at91sam9260-wdt";
+				reg = <0xfffffd40 0x10>;
+				status = "disabled";
+			};
 		};
 
 		nand0: nand at 40000000 {

index 3e6e5c1..ff54612 100644
@@ -195,6 +195,12 @@
 				#size-cells = <0>;
 				status = "disabled";
 			};
+
+			watchdog at fffffd40 {
+				compatible = "atmel,at91sam9260-wdt";
+				reg = <0xfffffd40 0x10>;
+				status = "disabled";
+			};
 		};
 
 		nand0: nand at 40000000 {

index 3add030..a98c00a 100644
@@ -262,6 +262,12 @@
 					trigger-value = <0x6>;
 				};
 			};
+
+			watchdog at fffffd40 {
+				compatible = "atmel,at91sam9260-wdt";
+				reg = <0xfffffd40 0x10>;
+				status = "disabled";
+			};
 		};
 
 		nand0: nand at 40000000 {

1.8.0

Tested on evk-pro3.

---
 arch/arm/boot/dts/evk-pro3.dts | 4 ++++
 1 file changed, 4 insertions(+)

index b7354e6..ce959ee 100644
@@ -26,6 +26,10 @@
 				atmel,vbus-gpio = <&pioC 5 0>;
 				status = "okay";
 			};
+
+			watchdog at fffffd40 {
+				status = "okay";
+			};
 		};
 
 		usb0: ohci at 00500000 {

1.8.0