56 lines
1.7 KiB
YAML
56 lines
1.7 KiB
YAML
%YAML 1.2
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---
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$id: http://devicetree.org/schemas/bindings/arm/msm/msm_watchdog.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: QTI MSM Watchdog
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maintainers:
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- Prakruthi Deepak Heragu <pheragu@quicinc.com>
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description: |+
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Watchdog timer is configured with a bark and a bite time.
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If the watchdog is not "pet" at regular intervals, the system
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is assumed to have become non responsive and needs to be reset.
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A warning in the form of a bark timeout leads to a bark interrupt
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and a kernel panic. If the watchdog timer is still not reset,
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a bite timeout occurs, which is an interrupt in the secure mode,
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which leads to a reset of the SOC via the secure watchdog. The
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driver needs the petting time, and the bark timeout to be programmed
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into the watchdog, as well as the bark and bite irqs.
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The device tree parameters for the watchdog are:
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properties:
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compatible:
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Usage: required
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Value type: <string>
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Definition: Must be "qcom,msm-watchdog"
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reg:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: offset and length of the register set for the watchdog block.
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reg-names:
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Usage: required
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Value type: <string>
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Definition: names corresponding to each reg property value (base required).
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"wdt-base" - physical base address of watchdog timer registers
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"wdt-absent-base" - physical base address of watchdog absent register
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interrupts:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: should contain bark and bite irq numbers
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example:
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- |
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wdog: qcom,wdt@17c10000{
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compatible = "qcom,msm-watchdog";
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reg = <0x17c10000 0x1000>;
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reg-names = "wdt-base";
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interrupts = <0 0 IRQ_TYPE_LEVEL_HIGH>,
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<0 1 IRQ_TYPE_LEVEL_HIGH>;
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};
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...
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