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From:   Hakan Jansson <hakan.jansson@infineon.com>
CC:     Hakan Jansson <hakan.jansson@infineon.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        <netdev@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        Marcel Holtmann <marcel@holtmann.org>,
        Johan Hedberg <johan.hedberg@gmail.com>,
        "Luiz Augusto von Dentz" <luiz.dentz@gmail.com>,
        <linux-bluetooth@vger.kernel.org>
Subject: [PATCH v2 1/2] dt-bindings: net: broadcom-bluetooth: Add property for autobaud mode
Date:   Fri, 20 May 2022 17:07:13 +0200
Message-ID: <cb20a6f49c91521d54c847ee4dc14451b0ee91dd.1653057480.git.hakan.jansson@infineon.com>
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Some devices (e.g. CYW5557x) require autobaud mode to enable FW loading.
Autobaud mode can also be required on some boards where the controller
device is using a non-standard baud rate when first powered on.

This patch adds a property, "brcm,uses-autobaud-mode", to enable autobaud
mode selection.

Signed-off-by: Hakan Jansson <hakan.jansson@infineon.com>
---
V1 -> V2: Modify property description

 .../devicetree/bindings/net/broadcom-bluetooth.yaml      | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
index 5aac094fd217..a29f059c21cc 100644
--- a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
+++ b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
@@ -92,6 +92,15 @@ properties:
        pcm-sync-mode: slave, master
        pcm-clock-mode: slave, master
 
+  brcm,uses-autobaud-mode:
+    type: boolean
+    description: >
+      Setting this property will make the host (driver) assert the controller
+      chip's BT_UART_CTS_N prior to asserting BT_REG_ON. This will make the
+      controller start up in autobaud mode. The controller will then detect the
+      baud rate of the first incoming (HCI Reset) command from the host and
+      subsequently use that baud rate.
+
   interrupts:
     items:
       - description: Handle to the line HOST_WAKE used to wake
-- 
2.25.1