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Subject[PATCH] watchdog: imx2_wdt: allow setting timeout in devicetree
Date
By following best practice described in
Documentation/watchdog/watchdog-kernel-api.txt, it also let us to set
timout-sec property in devicetree.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt | 2 ++
drivers/watchdog/imx2_wdt.c | 8 ++------
2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
index 107280ef0025..adc6b76fcb3a 100644
--- a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
@@ -11,6 +11,7 @@ Optional properties:
detail please see: Documentation/devicetree/bindings/regmap/regmap.txt.
- fsl,ext-reset-output: If present the watchdog device is configured to
assert its external reset (WDOG_B) instead of issuing a software reset.
+- timeout-sec : Contains the watchdog timeout in seconds

Examples:

@@ -19,4 +20,5 @@ wdt@73f98000 {
reg = <0x73f98000 0x4000>;
interrupts = <58>;
big-endian;
+ timeout-sec = <20>;
};
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 4874b0f18650..b8674c5c2d9f 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -76,7 +76,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");


-static unsigned timeout = IMX2_WDT_DEFAULT_TIME;
+static unsigned timeout;
module_param(timeout, uint, 0);
MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default="
__MODULE_STRING(IMX2_WDT_DEFAULT_TIME) ")");
@@ -275,6 +275,7 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
wdog->info = &imx2_wdt_info;
wdog->ops = &imx2_wdt_ops;
wdog->min_timeout = 1;
+ wdog->timeout = IMX2_WDT_DEFAULT_TIME;
wdog->max_hw_heartbeat_ms = IMX2_WDT_MAX_TIME * 1000;
wdog->parent = &pdev->dev;

@@ -293,11 +294,6 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)

wdev->ext_reset = of_property_read_bool(pdev->dev.of_node,
"fsl,ext-reset-output");
- wdog->timeout = clamp_t(unsigned, timeout, 1, IMX2_WDT_MAX_TIME);
- if (wdog->timeout != timeout)
- dev_warn(&pdev->dev, "Initial timeout out of range! Clamped from %u to %u\n",
- timeout, wdog->timeout);
-
platform_set_drvdata(pdev, wdog);
watchdog_set_drvdata(wdog, wdev);
watchdog_set_nowayout(wdog, nowayout);
--
2.15.1
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