linux-kernel - [PATCH v4 2/7] dt-bindings: net: Add Broadcom BCM4377 family PCIe Bluetooth

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Date:   Thu, 27 Oct 2022 17:08:17 +0200
From:   Sven Peter <sven@...npeter.dev>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Sven Peter <sven@...npeter.dev>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Hector Martin <marcan@...can.st>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        asahi@...ts.linux.dev, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v4 2/7] dt-bindings: net: Add Broadcom BCM4377 family PCIe Bluetooth

These chips are combined Wi-Fi/Bluetooth radios which expose a
PCI subfunction for the Bluetooth part.
They are found in Apple machines such as the x86 models with the T2
chip or the arm64 models with the M1 or M2 chips.

Signed-off-by: Sven Peter <sven@...npeter.dev>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../net/bluetooth/brcm,bcm4377-bluetooth.yaml | 81 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml

diff --git a/Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml b/Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
new file mode 100644
index 000000000000..37cb39a3a62e
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/brcm,bcm4377-bluetooth.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM4377 family PCIe Bluetooth Chips
+
+maintainers:
+  - Sven Peter <sven@...npeter.dev>
+
+description:
+  This binding describes Broadcom BCM4377 family PCIe-attached bluetooth chips
+  usually found in Apple machines. The Wi-Fi part of the chip is described in
+  bindings/net/wireless/brcm,bcm4329-fmac.yaml.
+
+allOf:
+  - $ref: bluetooth-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - pci14e4,5fa0 # BCM4377
+      - pci14e4,5f69 # BCM4378
+      - pci14e4,5f71 # BCM4387
+
+  reg:
+    maxItems: 1
+
+  brcm,board-type:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: Board type of the Bluetooth chip. This is used to decouple
+      the overall system board from the Bluetooth module and used to construct
+      firmware and calibration data filenames.
+      On Apple platforms, this should be the Apple module-instance codename
+      prefixed by "apple,", e.g. "apple,atlantisb".
+    pattern: '^apple,.*'
+
+  brcm,taurus-cal-blob:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    description: A per-device calibration blob for the Bluetooth radio. This
+      should be filled in by the bootloader from platform configuration
+      data, if necessary, and will be uploaded to the device.
+      This blob is used if the chip stepping of the Bluetooth module does not
+      support beamforming.
+
+  brcm,taurus-bf-cal-blob:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    description: A per-device calibration blob for the Bluetooth radio. This
+      should be filled in by the bootloader from platform configuration
+      data, if necessary, and will be uploaded to the device.
+      This blob is used if the chip stepping of the Bluetooth module supports
+      beamforming.
+
+  local-bd-address: true
+
+required:
+  - compatible
+  - reg
+  - local-bd-address
+  - brcm,board-type
+
+additionalProperties: false
+
+examples:
+  - |
+    pcie@...00000 {
+      #address-cells = <3>;
+      #size-cells = <2>;
+      reg = <0xa0000000 0x1000000>;
+      device_type = "pci";
+      ranges = <0x43000000 0x6 0xa0000000 0xa0000000 0x0 0x20000000>;
+
+      bluetooth@0,1 {
+        compatible = "pci14e4,5f69";
+        reg = <0x100 0x0 0x0 0x0 0x0>;
+        brcm,board-type = "apple,honshu";
+        /* To be filled by the bootloader */
+        local-bd-address = [00 00 00 00 00 00];
+      };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index cf0f18502372..ca45551220f5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1903,6 +1903,7 @@ F:	Documentation/devicetree/bindings/interrupt-controller/apple,*
 F:	Documentation/devicetree/bindings/iommu/apple,dart.yaml
 F:	Documentation/devicetree/bindings/iommu/apple,sart.yaml
 F:	Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
+F:	Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
 F:	Documentation/devicetree/bindings/nvme/apple,nvme-ans.yaml
 F:	Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
 F:	Documentation/devicetree/bindings/pci/apple,pcie.yaml
-- 
2.25.1