From: Marcus Folkesson <marcus.folkesson@gmail.com>
Date: Thu, 8 Feb 2018 14:11:08 +0100
Subject: watchdog: imx2_wdt: allow setting timeout in devicetree
Git-commit: 2b77f0083a7c2e57ecc38d82b11213dc51f733c8
Patch-mainline: v4.17-rc1
References: fate#326530,fate#326531,fate#326535,fate#326538,fate#326539
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>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.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 518dfa1047cb..f07850d2c977 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) ")");
@@ -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);
--
2.11.0