linux-kernel - [PATCH v5 1/4] dt-bindings: platform: microsoft: Document surface xbl

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Message-Id: <20220405210750.619511-2-jaschultzMS@gmail.com>
Date:   Tue,  5 Apr 2022 14:07:47 -0700
From:   Jarrett Schultz <jaschultzms@...il.com>
To:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Maximilian Luz <luzmaximilian@...il.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Felipe Balbi <balbi@...nel.org>,
        Jarrett Schultz <jaschultz@...rosoft.com>
Subject: [PATCH v5 1/4] dt-bindings: platform: microsoft: Document surface xbl

From: Jarrett Schultz <jaschultz@...rosoft.com>

Introduce yaml for surface xbl driver.

Signed-off-by: Jarrett Schultz <jaschultz@...rosoft.com>

---

Changed in v5:

 - Updated description
 - Added child node for imem
 - Simplified example

---

Changes in v4:
 - Addressed small formatting changes
 - Removed unnecessary lines

---

Changes in v3:
 - Updated description to only pertain to the hardware
 - Updated the required field to properly reflect the binding
 - Removed the first example
 - Fixed the size of the reg field in the second example

---

Changes in v2:
 - Removed json-schema dependence
 - Elaborated on description of driver
 - Updated example
---
 .../platform/microsoft/surface-xbl.yaml       | 70 +++++++++++++++++++
 MAINTAINERS                                   |  7 ++
 2 files changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/platform/microsoft/surface-xbl.yaml

diff --git a/Documentation/devicetree/bindings/platform/microsoft/surface-xbl.yaml b/Documentation/devicetree/bindings/platform/microsoft/surface-xbl.yaml
new file mode 100644
index 000000000000..648476670bbd
--- /dev/null
+++ b/Documentation/devicetree/bindings/platform/microsoft/surface-xbl.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/platform/microsoft/surface-xbl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Surface Extensible Bootloader for Microsoft Surface Duo
+
+maintainers:
+  - Jarrett Schultz <jaschultz@...rosoft.com>
+
+description: |
+  Defined to expose information that is used during production when
+  the device is in manufacturing mode. Some of the information included
+  in the imem section is -
+    * board_id
+    * battery_present
+    * hw_init_retries
+    * is_customer_mode
+    * is_act_mode
+    * pmic_reset_reason
+    * touch_fw_version
+    * ocp_error_location
+
+properties:
+  compatible:
+    const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  child-node:
+    description: A description of the xbl space within imem
+
+    type: object
+
+    properties:
+      compatible: 
+        const: microsoft,sm8150-surface-duo-xbl
+
+      reg:
+        maxItems: 1
+
+    required:
+      - compatible
+      - reg
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - ranges
+  - address-cells
+  - size-cells
+
+examples:
+  - |
+    imem@...bf000 {
+      compatible = "simple-mfd";
+      reg = <0x146bf000 0x1000>;
+      ranges = <0x0 0x146bf000 0x1000>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      xbl@a94 {
+        compatible = "microsoft,sm8150-surface-duo-xbl";
+        reg = <0xa94 0x100>;
+      };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 13f9a84a617e..5d0ca2a98b57 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12649,6 +12649,13 @@ F:	Documentation/driver-api/surface_aggregator/clients/dtx.rst
 F:	drivers/platform/surface/surface_dtx.c
 F:	include/uapi/linux/surface_aggregator/dtx.h
 
+MICROSOFT SURFACE DUO XBL DRIVER
+M:	Jarrett Schultz <jaschultz@...rosoft.com>
+L:	linux-arm-msm@...r.kernel.org
+L:	platform-driver-x86@...r.kernel.org
+S:	Supported
+F:	Documentation/devicetree/bindings/platform/microsoft/surface-xbl.yaml
+
 MICROSOFT SURFACE GPE LID SUPPORT DRIVER
 M:	Maximilian Luz <luzmaximilian@...il.com>
 L:	platform-driver-x86@...r.kernel.org
-- 
2.25.1