linux-kernel - [PATCH 2/2] ath11k: search DT for qcom,ath11k-board-id

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Date:   Tue, 21 Jun 2022 15:53:39 +0200
From:   Robert Marko <robimarko@...il.com>
To:     kvalo@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, ath11k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Robert Marko <robimarko@...il.com>
Subject: [PATCH 2/2] ath11k: search DT for qcom,ath11k-board-id

bus + qmi-chip-id + qmi-board-id and optionally the variant are currently
used for identifying the correct board data file.

This however is sometimes not enough as all of the IPQ8074 boards that I
have access to dont have the qmi-board-id properly fused and simply return
the default value of 0xFF.

So, to provide the correct qmi-board-id look for the qcom,ath11k-board-id
property and use that.
This is what vendors have been doing in the stock firmwares that were
shipped on boards I have.

It should be added to DTS like:
	wifi@...0000 {
        status = "okay";

        qcom,ath11k-board-id = <658>;
        qcom,ath11k-calibration-variant = "Edgecore-EAP102";
    };

Signed-off-by: Robert Marko <robimarko@...il.com>
---
 drivers/net/wireless/ath/ath11k/qmi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index 00136601cb7d..9d27b4968d10 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2172,12 +2172,14 @@ static int ath11k_qmi_request_device_info(struct ath11k_base *ab)
 
 static int ath11k_qmi_request_target_cap(struct ath11k_base *ab)
 {
+	struct device *dev = ab->dev;
 	struct qmi_wlanfw_cap_req_msg_v01 req;
 	struct qmi_wlanfw_cap_resp_msg_v01 resp;
 	struct qmi_txn txn;
 	int ret = 0;
 	int r;
 	char *fw_build_id;
+	unsigned int board_id;
 	int fw_build_id_mask_len;
 
 	memset(&req, 0, sizeof(req));
@@ -2219,7 +2221,9 @@ static int ath11k_qmi_request_target_cap(struct ath11k_base *ab)
 		ab->qmi.target.chip_family = resp.chip_info.chip_family;
 	}
 
-	if (resp.board_info_valid)
+	if (!of_property_read_u32(dev->of_node, "qcom,ath11k-board-id", &board_id))
+		ab->qmi.target.board_id = board_id;
+	else if (resp.board_info_valid)
 		ab->qmi.target.board_id = resp.board_info.board_id;
 	else
 		ab->qmi.target.board_id = 0xFF;
-- 
2.36.1