linux-kernel - [PATCH 1/2] dt-bindings: net: broadcom-bluetooth: Add property for autobaud mode

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Date:   Wed, 4 May 2022 11:03:39 +0200
From:   Hakan Jansson <hakan.jansson@...ineon.com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Hakan Jansson <hakan.jansson@...ineon.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        "Luiz Augusto von Dentz" <luiz.dentz@...il.com>,
        <linux-bluetooth@...r.kernel.org>
Subject: [PATCH 1/2] dt-bindings: net: broadcom-bluetooth: Add property for autobaud mode

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@...ineon.com>
---
 .../devicetree/bindings/net/broadcom-bluetooth.yaml        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
index 5aac094fd217..26bba3f1c935 100644
--- a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
+++ b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
@@ -92,6 +92,13 @@ properties:
        pcm-sync-mode: slave, master
        pcm-clock-mode: slave, master
 
+  brcm,uses-autobaud-mode:
+    type: boolean
+    description: >
+      The controller should be started in autobaud mode by asserting
+      BT_UART_CTS_N (i.e. host RTS) during startup. Only HCI commands supported
+      in autobaud mode should be used until patch FW has been loaded.
+
   interrupts:
     items:
       - description: Handle to the line HOST_WAKE used to wake
-- 
2.25.1