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From: Evan Benn <evanbenn@chromium.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: jwerner@chromium.org, xingyu.chen@amlogic.com,
	Evan Benn <evanbenn@chromium.org>,
	"David S. Miller" <davem@davemloft.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Guenter Roeck <linux@roeck-us.net>,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org
Subject: [PATCH v5 1/2] dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog
Date: Thu, 23 Apr 2020 14:40:35 +1000	[thread overview]
Message-ID: <20200423143945.v5.1.Id96574f1f52479d7a2f3b866b8a0552ab8c03d7f@changeid> (raw)
In-Reply-To: <20200423044036.234578-1-evanbenn@chromium.org>

This watchdog can be used on ARM systems with a Secure
Monitor firmware to forward watchdog operations to
firmware via a Secure Monitor Call.

Signed-off-by: Evan Benn <evanbenn@chromium.org>

---

Changes in v5:
- Change compatible to arm,smc-wdt

Changes in v4:
- Add arm,smc-id property

Changes in v3:
- Change name back to arm

Changes in v2:
- Change name arm > mt8173

 .../bindings/watchdog/arm-smc-wdt.yaml        | 36 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++++
 2 files changed, 42 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
new file mode 100644
index 0000000000000..0ee39aa3be027
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/arm-smc-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Secure Monitor Call based watchdog
+
+allOf:
+  - $ref: "watchdog.yaml#"
+
+maintainers:
+  - Julius Werner <jwerner@chromium.org>
+
+properties:
+  compatible:
+    enum:
+      - arm,smc-wdt
+  arm,smc-id:
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+      - default: 0x82003D06
+    description:
+      The ATF smc function id used by the firmware.
+
+required:
+  - compatible
+
+examples:
+  - |
+    watchdog {
+      compatible = "arm,smc-wdt";
+      timeout-sec = <15>;
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index b816a453b10eb..0f2b39767bfa9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1457,6 +1457,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt
 F:	drivers/irqchip/irq-vic.c
 
+ARM SMC WATCHDOG DRIVER
+M:	Julius Werner <jwerner@chromium.org>
+R:	Evan Benn <evanbenn@chromium.org>
+S:	Maintained
+F:	devicetree/bindings/watchdog/arm-smc-wdt.yaml
+
 ARM SMMU DRIVERS
 M:	Will Deacon <will@kernel.org>
 R:	Robin Murphy <robin.murphy@arm.com>
-- 
2.26.2.303.gf8c07b1a785-goog


  reply	other threads:[~2020-04-23  4:41 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-23  4:40 [PATCH v5 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls Evan Benn
2020-04-23  4:40 ` Evan Benn [this message]
2020-04-23  4:40 ` [PATCH v5 2/2] watchdog: Add new arm_smc_wdt watchdog driver Evan Benn
2020-04-23  5:05   ` Guenter Roeck
2020-04-23 22:17   ` Julius Werner
2020-04-28  4:42     ` Evan Benn
2020-04-28 20:06       ` Julius Werner

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