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Thu, 27 Aug 2026 10:59:26 -0700 (PDT) Received: from localhost.localdomain ([85.118.83.238]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482e27a9945sm10272342f8f.9.2026.08.27.10.59.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Aug 2026 10:59:26 -0700 (PDT) From: Georgi Valkov To: briannorris@chromium.org, johannes@sipsolutions.net, andrew@lunn.ch, krzk+dt@kernel.org Cc: francesco@dolcini.it, johannes.berg@intel.com, kees@kernel.org, miriam.rachel.korenblit@intel.com, rongqianfeng@vivo.com, wenst@chromium.org, rafael.beims@toradex.com, avraham.stern@intel.com, error27@gmail.com, s.kerkmann@pengutronix.de, gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com, robh@kernel.org, conor+dt@kernel.org, Frank.Li@nxp.com, chunfan.chen@gmail.com, arend.vanspriel@broadcom.com, peddolla.reddy@oss.qualcomm.com, linux-arm-kernel@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, gvalkov@gmail.com, Krzysztof Kozlowski Subject: [PATCH v9 1/3] dt-bindings: net: wireless: add flag marvell,invalid-reg-hint-in-rom Date: Thu, 27 Aug 2026 20:58:48 +0300 Message-ID: <20260827175850.89395-1-gvalkov@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit WRT3200ACM and WRT32x routers always report a fixed US regulatory domain from the mwifiex ROM, which conflicts with the platform regulatory configuration on units sold outside the US market. For example: - phy0 mwlwifi 5 GHz, hard-coded region 98 EU mapped to FR - phy1 mwlwifi 2.4 GHz, hard-coded region 98 EU mapped to FR - phy2 mwifiex 2.4 and 5 GHz, hard-coded region US When the system boots, it detects a conflict between the user selected region and the radios, e.g. BG FR US, and applies extreme restrictions, preventing phy0 from starting on any DFS channel. phy2 works. Add a device-tree flag, which allows affected devices, where the radio conflicts with the platform to ignore the incorrect regulatory hint in the ROM of the radio, so the platform regulatory domain can be used. This does not allow the user to change the regulatory configuration of any radio. It only allows phy0 to start and operate according to its certified configuration. [1] https://github.com/kaloz/mwlwifi/issues/173#issuecomment-307879699 [2] https://github.com/openwrt/openwrt/issues/9956 Signed-off-by: Georgi Valkov Reviewed-by: Krzysztof Kozlowski --- v9: 1. no change 2. drop Cc: stable 3. drop Cc: stable v8: 1. no change 2. drop invalid tag Tested-on, replace it with description of the fix 3. no change v7: 1. drop Cc: stable, the first patch only documents a binding 2. restore colon after Tested-on as requested by openwrt-ai 3. mention the added wifi@1 node v6: Rename flag: marvell,ignore-regulatory-hint -> marvell,invalid-reg-hint-in-rom Clarify commit description: The patch series allows affected devices, where the radio conflicts with the platform to ignore the incorrect regulatory hint in the ROM of the radio, so the platform regulatory domain can be used. This does not allow the user to change the regulatory configuration of any radio. It only allows phy0 to start and operate according to its certified configuration. The change affects only platforms which explicitly define this flag, and helps overcome the incorrect behaviour of proprietary radio firmware. Rearrange patches so that the flag is implemented in the driver, before being added to the board for WRT3200ACM. Link: https://lore.kernel.org/linux-wireless/20260728103536.25012-1-gvalkov@gmail.com/T/#u v5: 1. description: remove tag Tested-on 2. add #address-cells = <1>, #size-cells = <0> to fix a warning: arch/arm/boot/dts/marvell/armada-385-linksys-rango.dts:183.3-13: Warning (reg_format): /soc/internal-regs/sdhci@d8000/wifi@1:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1) 3. description: add info about testing v4: 1. Add binding documentation for flag marvell,ignore-regulatory-hint 2. Add dt for sd8897 and move the flag there, I used sample from docs 3. Use device_property_read_bool in the driver v3: I implemented and tested a better approach with no board specific code: 1. check for a device-tree flag in mwifiex_register_cfg80211in() !of_property_read_bool(of_root, "marvell,ignore-regulatory-hint") 2. add this flag to the root device tree of each affected board Currently this affects only armada-385-linksys-rango.dts, because Linux has no dts for venom. OpenWrt will take care of that. This approach is more flexible and scalable, because the flag can also be used in other drivers, e.g. mwlwifi (not part of Linux). v2: Replace the compatible device names, which are currently only available on OpenWrt with board names which are available on both Linux and OpenWrt. .../devicetree/bindings/net/wireless/marvell,sd8787.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/net/wireless/marvell,sd8787.yaml b/Documentation/devicetree/bindings/net/wireless/marvell,sd8787.yaml index 930b700b73d0..9f905ef5c2c0 100644 --- a/Documentation/devicetree/bindings/net/wireless/marvell,sd8787.yaml +++ b/Documentation/devicetree/bindings/net/wireless/marvell,sd8787.yaml @@ -59,6 +59,12 @@ properties: description: Calibration data for sub-band 3 in the 5GHz band. maxItems: 502 + marvell,invalid-reg-hint-in-rom: + $ref: /schemas/types.yaml#/definitions/flag + description: + The regulatory hint in ROM conflicts with platform configuration. + It should be ignored, so the platform regulatory domain can be used. + marvell,wakeup-pin: $ref: /schemas/types.yaml#/definitions/uint32 description: -- 2.55.0