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watchdog: imx2_wdt: allow setting timeout in devicetree 

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>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
hifive-unleashed-5.1
Marcus Folkesson 2018-02-08 14:11:08 +01:00 committed by Wim Van Sebroeck
parent 2b3d89b402
commit 2b77f0083a
2 changed files with 4 additions and 6 deletions
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2
Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt
View File

@ -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>;
};

8
drivers/watchdog/imx2_wdt.c
View File

@ -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) ")");
@ -281,6 +281,7 @@ 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;
@ -299,11 +300,6 @@ 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);