netdev - [PATCH 1/2] dt-bindings: bcm4329-fmac: add optional brcm,ccode-map-trivial

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Message-Id: <20220711123005.3055300-2-alvin@pqrs.dk>
Date:   Mon, 11 Jul 2022 14:30:03 +0200
From:   Alvin Šipraga <alvin@...s.dk>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        van Spriel <arend@...adcom.com>
Cc:     Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com
Subject: [PATCH 1/2] dt-bindings: bcm4329-fmac: add optional brcm,ccode-map-trivial

From: Alvin Šipraga <alsi@...g-olufsen.dk>

The bindings already offer a brcm,ccode-map property to describe the
mapping between the kernel's ISO3166 alpha 2 country code string and the
firmware's country code string and revision number. This is a
board-specific property and determined by the CLM blob firmware provided
by the hardware vendor.

However, in some cases the firmware will also use ISO3166 country codes
internally, and the revision will always be zero. This implies a trivial
mapping: cc -> { cc, 0 }.

For such cases, add an optional property brcm,ccode-map-trivial which
obviates the need to describe every trivial country code mapping in the
device tree with the existing brcm,ccode-map property. The new property
is subordinate to the more explicit brcm,ccode-map property.

Signed-off-by: Alvin Šipraga <alsi@...g-olufsen.dk>
---
 .../bindings/net/wireless/brcm,bcm4329-fmac.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
index c11f23b20c4c..53b4153d9bfc 100644
--- a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
+++ b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
@@ -75,6 +75,16 @@ properties:
     items:
       pattern: '^[A-Z][A-Z]-[A-Z][0-9A-Z]-[0-9]+$'
 
+  brcm,ccode-map-trivial:
+    description: |
+      Use a trivial mapping of ISO3166 country codes to brcmfmac firmware
+      country code and revision: cc -> { cc, 0 }. In other words, assume that
+      the CLM blob firmware uses ISO3166 country codes as well, and that all
+      revisions are zero. This property is mutually exclusive with
+      brcm,ccode-map. If both properties are specified, then brcm,ccode-map
+      takes precedence.
+    type: boolean
+
 required:
   - compatible
   - reg
-- 
2.37.0