linux-kernel - [PATCH 3/7] watchdog: sirfsoc: allow setting timeout in devicetree

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Date:   Fri,  9 Feb 2018 20:27:20 +0100
From:   Marcus Folkesson <marcus.folkesson@...il.com>
To:     Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Carlo Caione <carlo@...one.org>,
        Kevin Hilman <khilman@...libre.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Barry Song <baohua@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:     linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH 3/7] watchdog: sirfsoc: allow setting timeout in devicetree

watchdog_init_timeout() will allways pick timeout_param since it
defaults to a valid timeout.

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@...il.com>
---
 Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt | 4 ++++
 drivers/watchdog/sirfsoc_wdt.c                             | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
index 9cbc76c89b2b..0dce5e3100b4 100644
--- a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
@@ -5,10 +5,14 @@ Required properties:
 - reg: Address range of tick timer/WDT register set
 - interrupts: interrupt number to the cpu
 
+Optional properties:
+- timeout-sec : Contains the watchdog timeout in seconds
+
 Example:
 
 timer@...20000 {
 	compatible = "sirf,prima2-tick";
 	reg = <0xb0020000 0x1000>;
 	interrupts = <0>;
+	timeout-sec = <30>;
 };
diff --git a/drivers/watchdog/sirfsoc_wdt.c b/drivers/watchdog/sirfsoc_wdt.c
index 4eea351e09b0..ac0c9d2c4aee 100644
--- a/drivers/watchdog/sirfsoc_wdt.c
+++ b/drivers/watchdog/sirfsoc_wdt.c
@@ -29,7 +29,7 @@
 #define SIRFSOC_WDT_MAX_TIMEOUT		(10 * 60)	/* 10 mins */
 #define SIRFSOC_WDT_DEFAULT_TIMEOUT	30		/* 30 secs */
 
-static unsigned int timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT;
+static unsigned int timeout;
 static bool nowayout = WATCHDOG_NOWAYOUT;
 
 module_param(timeout, uint, 0);
-- 
2.15.1