linux-kernel - [PATCH V7 1/2] dt-bindings: firmware: bootstats: Add the dtschema

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Message-ID: <b3105990e021a71039f621e6c4e70ab05fb348fa.1688533340.git.quic_schowdhu@quicinc.com>
Date:   Wed, 5 Jul 2023 11:02:31 +0530
From:   Souradeep Chowdhury <quic_schowdhu@...cinc.com>
To:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, Arnd Bergmann <arnd@...db.de>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Sibi Sankar <quic_sibis@...cinc.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Souradeep Chowdhury <quic_schowdhu@...cinc.com>
Subject: [PATCH V7 1/2] dt-bindings: firmware: bootstats: Add the dtschema

Add the device tree bindings for boot stats. This has 2 properties
pre-abl-time and abl-time which records the timestamps for boot
stats.

Signed-off-by: Souradeep Chowdhury <quic_schowdhu@...cinc.com>
Link: https://lore.kernel.org/linux-arm-kernel/7d397e67-5d56-4975-98af-1ac9746c07f4@app.fastmail.com/
---
 .../bindings/firmware/qcom,bootstats.yaml     | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/qcom,bootstats.yaml

diff --git a/Documentation/devicetree/bindings/firmware/qcom,bootstats.yaml b/Documentation/devicetree/bindings/firmware/qcom,bootstats.yaml
new file mode 100644
index 000000000000..22e697524058
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/qcom,bootstats.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/qcom,bootstats.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Boot Stats
+
+maintainers:
+  - Souradeep Chowdhury <quic_schowdhu@...cinc.com>
+
+description: |
+    Qualcomm's proprietary Android boot-loaders capture boot time
+    stats, like the time when the bootloader started execution and
+    at what point the bootloader handed over control to the kernel.
+    This is captured in the unit of ms in devicetree property.
+
+properties:
+  pre-abl-time:
+    description: The property to store the starting point of abl in ms.
+    $ref: /schemas/types.yaml#/definitions/string-array
+
+  abl-time:
+    description: The property to store the duration of abl in ms.
+    $ref: /schemas/types.yaml#/definitions/string-array
+
+required:
+  - pre-abl-time
+  - abl-time
+
+additionalProperties: false
+
+examples:
+  - |
+    bootstats {
+        pre-abl-time="17627";
+        abl-time="26748";
+    };
-- 
2.17.1