linux-kernel - Re: [PATCH v4 ath-current 1/2] wifi: ath11k: add usecase firmware handling based on device compatible

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Message-ID: <ea99fca7-c51a-43f8-8fb7-f228b36d3eef@oss.qualcomm.com>
Date: Wed, 28 Jan 2026 21:12:21 +0530
From: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>
To: Miaoqing Pan <miaoqing.pan@....qualcomm.com>, jjohnson@...nel.org,
        johannes@...solutions.net, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org
Cc: ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        jonas.gorski@...il.com, krzk@...nel.org
Subject: Re: [PATCH v4 ath-current 1/2] wifi: ath11k: add usecase firmware
 handling based on device compatible



On 1/21/2026 3:20 PM, Miaoqing Pan wrote:
> For M.2 WLAN chips, there is no suitable DTS node to specify the
> firmware-name property. In addition, assigning firmware for the
> M.2 PCIe interface causes chips that do not use usecase specific
> firmware to fail. Therefore, abandoning the approach of specifying
> firmware in DTS. As an alternative, propose a static lookup table
> mapping device compatible to firmware names. Currently, only WCN6855
> HW2.1 requires this.
> 
> However, support for the firmware-name property is retained to keep
> the ABI backwards compatible.
> 
> For details on usecase specific firmware, see:
> https://lore.kernel.org/all/20250522013444.1301330-3-miaoqing.pan@oss.qualcomm.com/.
> 
> Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1
> 
> Fixes: edbbc647c4f3 ("wifi: ath11k: support usercase-specific firmware overrides")
> Signed-off-by: Miaoqing Pan <miaoqing.pan@....qualcomm.com>

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>