[PATCH 3/3] watchdog: dw_wdt: add a devicetree binding
From: Heiko Stübner <heiko@sntech.de>
Date: 2013-06-26 18:05:12
Also in:
linux-watchdog, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, watchdog device drivers · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Wim Van Sebroeck, Guenter Roeck
The dw_wdt does not use any platform-specific data, so no new properties need to be introduced. The dw-apb-wdt naming follows other designware components in the kernel and is also written like this in documentation describing the component. Signed-off-by: Heiko Stuebner <heiko@sntech.de> --- .../devicetree/bindings/watchdog/snps-dw-apb-wdt.txt | 18 ++++++++++++++++++ drivers/watchdog/dw_wdt.c | 10 ++++++++++ 2 files changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/snps-dw-apb-wdt.txt
diff --git a/Documentation/devicetree/bindings/watchdog/snps-dw-apb-wdt.txt b/Documentation/devicetree/bindings/watchdog/snps-dw-apb-wdt.txt
new file mode 100644
index 0000000..c20cdd1
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/snps-dw-apb-wdt.txt@@ -0,0 +1,18 @@ +* Synosis DesignWare APB Watchdog + +The Watchdog controller is used for resuming system operation +after a preset amount of time during which the WDT reset event has not +occurred. + +Required properties: +- compatible : "snps,dw-apb-wdt" +- reg : offset and length of the register set for the device. +- clocks : the periphal clock of the controller. + +Example: + + watchdog@2004c000 { + compatible = "snps,dw-apb-wdt"; + reg = <0x2004c000 0x100>; + clocks = <&wdt_clock>; + };
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index b922bec..829e148 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c@@ -35,6 +35,7 @@ #include <linux/timer.h> #include <linux/uaccess.h> #include <linux/watchdog.h> +#include <linux/of.h> #define WDOG_CONTROL_REG_OFFSET 0x00 #define WDOG_CONTROL_REG_WDT_EN_MASK 0x01
@@ -337,12 +338,21 @@ static int dw_wdt_drv_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id dw_wdt_of_match[] = { + { .compatible = "snps,dw-apb-wdt", }, + {}, +}; +MODULE_DEVICE_TABLE(of, dw_i2c_of_match); +#endif + static struct platform_driver dw_wdt_driver = { .probe = dw_wdt_drv_probe, .remove = dw_wdt_drv_remove, .driver = { .name = "dw_wdt", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(dw_wdt_of_match), .pm = &dw_wdt_pm_ops, }, };
--
1.7.10.4