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[75.67.38.46]) by smtp.googlemail.com with ESMTPSA id 6a1803df08f44-8f1a7b26b2csm23003536d6.45.2026.06.30.06.30.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 06:30:15 -0700 (PDT) From: Andrew LaMarche To: Johannes Berg , Jeff Johnson , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-wireless@vger.kernel.org, devicetree@vger.kernel.org, ath12k@lists.infradead.org, linux-kernel@vger.kernel.org, Andrew LaMarche , Ernest Van Hoecke Subject: [PATCH v2 1/2] wifi: ath12k: support calibration-variant from device tree Date: Tue, 30 Jun 2026 13:30:00 +0000 Message-ID: <20260630133001.1426824-1-andrewjlamarche@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ath10k and ath11k support reading calibration variants from the device tree to locate the correct Board Description File (BDF). The ath12k-wsi binding already describes using qcom,calibration-variant but it is not implemented in the driver. Many ath12k designs expose all the radios under a single phy, each of which typically require a separate BDF. Without this, the radios may not come up or will not be calibrated correctly. Fix this by parsing the device tree for the generation-agnostic qcom,calibration-variant. This allows the driver to properly select, read and apply the correct BDF. Signed-off-by: Andrew LaMarche --- Changes in v2: - Drop ath12k-specific binding qcom,ath12k-calibration-variant in favor of generation agnostic qcom,calibration-variant. - Link to v1: https://lore.kernel.org/all/20260131003222.2011259-1-andrewjlamarche@gmail.com --- drivers/net/wireless/ath/ath12k/core.c | 22 ++++++++++++++++++++++ drivers/net/wireless/ath/ath12k/qmi.c | 4 ++++ 2 files changed, 26 insertions(+) diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c index 742d4fd1b598..52c28864c63c 100644 --- a/drivers/net/wireless/ath/ath12k/core.c +++ b/drivers/net/wireless/ath/ath12k/core.c @@ -812,6 +812,28 @@ int ath12k_core_check_smbios(struct ath12k_base *ab) return 0; } +int ath12k_core_check_dt(struct ath12k_base *ab) +{ + size_t max_len = sizeof(ab->qmi.target.bdf_ext); + const char *variant = NULL; + struct device_node *node; + + node = ab->dev->of_node; + if (!node) + return -ENOENT; + + of_property_read_string(node, "qcom,calibration-variant", + &variant); + if (!variant) + return -ENODATA; + + if (strscpy(ab->qmi.target.bdf_ext, variant, max_len) < 0) + ath12k_dbg(ab, ATH12K_DBG_BOOT, + "bdf variant string is longer than the buffer can accommodate (variant: %s)\n", variant); + + return 0; +} + static int ath12k_core_soc_create(struct ath12k_base *ab) { int ret; diff --git a/drivers/net/wireless/ath/ath12k/qmi.c b/drivers/net/wireless/ath/ath12k/qmi.c index fd762b5d7bb5..3cf39ae06fd3 100644 --- a/drivers/net/wireless/ath/ath12k/qmi.c +++ b/drivers/net/wireless/ath/ath12k/qmi.c @@ -2945,6 +2945,10 @@ int ath12k_qmi_request_target_cap(struct ath12k_base *ab) if (r) ath12k_dbg(ab, ATH12K_DBG_QMI, "SMBIOS bdf variant name not set.\n"); + r = ath12k_core_check_dt(ab); + if (r) + ath12k_dbg(ab, ATH12K_DBG_QMI, "DT bdf variant name not set.\n"); + r = ath12k_acpi_start(ab); if (r) /* ACPI is optional so continue in case of an error */ -- 2.43.0