From: <Eugen.Hristev@microchip.com>
To: wim@linux-watchdog.org, linux@roeck-us.net, robh+dt@kernel.org,
linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.or
Cc: Nicolas.Ferre@microchip.com, alexandre.belloni@bootlin.com,
Eugen.Hristev@microchip.com
Subject: [PATCH 1/3] dt-bindings: watchdog: sam9x60_wdt: add bindings
Date: Wed, 2 Oct 2019 07:35:23 +0000 [thread overview]
Message-ID: <1570001371-8174-1-git-send-email-eugen.hristev@microchip.com> (raw)
From: Eugen Hristev <eugen.hristev@microchip.com>
Add bindings for Microchip SAM9X60 Watchdog Timer
It has the same bindings as
Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt
except the compatible.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
.../devicetree/bindings/watchdog/sam9x60-wdt.txt | 34 ++++++++++++++++++++++
1 file changed, 34 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/sam9x60-wdt.txt
diff --git a/Documentation/devicetree/bindings/watchdog/sam9x60-wdt.txt b/Documentation/devicetree/bindings/watchdog/sam9x60-wdt.txt
new file mode 100644
index 00000000..74b4e2d
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/sam9x60-wdt.txt
@@ -0,0 +1,34 @@
+* Microchip SAM9X60 Watchdog Timer (WDT) Controller
+
+Required properties:
+- compatible: "microchip,sam9x60-wdt"
+- reg: base physical address and length of memory mapped region.
+
+Optional properties:
+- timeout-sec: watchdog timeout value (in seconds).
+- interrupts: interrupt number to the CPU.
+- atmel,watchdog-type: should be "hardware" or "software".
+ "hardware": enable watchdog fault reset. A watchdog fault triggers
+ watchdog reset.
+ "software": enable watchdog fault interrupt. A watchdog fault asserts
+ watchdog interrupt.
+- atmel,idle-halt: present if you want to stop the watchdog when the CPU is
+ in idle state.
+ CAUTION: This property should be used with care, it actually makes the
+ watchdog not counting when the CPU is in idle state, therefore the
+ watchdog reset time depends on mean CPU usage and will not reset at all
+ if the CPU stop working while it is in idle state, which is probably
+ not what you want.
+- atmel,dbg-halt: present if you want to stop the watchdog when the CPU is
+ in debug state.
+
+Example:
+ watchdog@ffffff80 {
+ compatible = "microchip,sam9x60-wdt";
+ reg = <0xffffff80 0x24>;
+ interrupts = <1 IRQ_TYPE_LEVEL_HIGH 5>;
+ timeout-sec = <10>;
+ atmel,watchdog-type = "hardware";
+ atmel,dbg-halt;
+ atmel,idle-halt;
+ };
--
2.7.4
next reply other threads:[~2019-10-02 7:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 7:35 Eugen.Hristev [this message]
2019-10-02 7:35 ` [PATCH 2/3] watchdog: sam9x60_wdt: introduce sam9x60 watchdog timer driver Eugen.Hristev
2019-10-02 10:23 ` Alexandre Belloni
2019-10-02 11:07 ` Eugen.Hristev
2019-10-02 13:16 ` Guenter Roeck
2019-10-07 7:58 ` Eugen.Hristev
2019-10-07 12:36 ` Guenter Roeck
2019-10-07 13:14 ` Alexandre Belloni
2019-10-07 14:17 ` Eugen.Hristev
2019-10-02 13:38 ` kbuild test robot
2019-10-02 7:35 ` [PATCH 3/3] MAINTAINERS: add sam9x60_wdt Eugen.Hristev
2019-10-02 9:56 ` [PATCH 1/3] dt-bindings: watchdog: sam9x60_wdt: add bindings Alexandre Belloni
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