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Miller" , Greg Kroah-Hartman , Guenter Roeck , Mauro Carvalho Chehab , Rob Herring , Wim Van Sebroeck , 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 Message-Id: <20200423143945.v5.1.Id96574f1f52479d7a2f3b866b8a0552ab8c03d7f@changeid> X-Mailer: git-send-email 2.26.2.303.gf8c07b1a785-goog In-Reply-To: <20200423044036.234578-1-evanbenn@chromium.org> References: <20200423044036.234578-1-evanbenn@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 --- 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 + +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 +R: Evan Benn +S: Maintained +F: devicetree/bindings/watchdog/arm-smc-wdt.yaml + ARM SMMU DRIVERS M: Will Deacon R: Robin Murphy -- 2.26.2.303.gf8c07b1a785-goog