[PATCH v2 2/2] wifi: ath11k: support board-specific firmware overrides

[Miaoqing Pan <quic_miaoqing@xxxxxxxxxxx>]

QCA6698AQ IP core is the same as WCN6855 hw2.1, but it has different RF,
IPA, thermal, RAM size and etc, so new firmware files used. This change
allows board DT files to override the subdir of the firmware directory
used to lookup the amss.bin and m3.bin.

For example:

- ath11k/WCN6855/hw2.1/amss.bin,
  ath11k/WCN6855/hw2.1/m3.bin: main firmware files, used by default

- ath11k/WCN6855/hw2.1/qca6698aq/amss.bin,
  ath11k/WCN6855/hw2.1/qca6698aq/m3.bin

Tested-on: QCA6698AQ hw2.1 PCI WLAN.HSP.1.1-04402-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1

Signed-off-by: Miaoqing Pan <quic_miaoqing@xxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath11k/core.c | 16 ++++++++++++++++
 drivers/net/wireless/ath/ath11k/core.h | 11 +++--------
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index be67382c00f6..775e48551522 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1178,6 +1178,22 @@ static int ath11k_core_create_chip_id_board_name(struct ath11k_base *ab, char *n
 					       ATH11K_BDF_NAME_CHIP_ID);
 }
 
+void ath11k_core_create_firmware_path(struct ath11k_base *ab,
+				      const char *filename,
+				      void *buf, size_t buf_len)
+{	const char *board_name = NULL;
+
+	of_property_read_string(ab->dev->of_node, "firmware-name", &board_name);
+
+	if (board_name)
+		snprintf(buf, buf_len, "%s/%s/%s/%s", ATH11K_FW_DIR,
+			 ab->hw_params.fw.dir, board_name, filename);
+	else
+		snprintf(buf, buf_len, "%s/%s/%s", ATH11K_FW_DIR,
+			 ab->hw_params.fw.dir, filename);
+}
+EXPORT_SYMBOL(ath11k_core_create_firmware_path);
+
 const struct firmware *ath11k_core_firmware_request(struct ath11k_base *ab,
 						    const char *file)
 {
diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 09c37e19a168..ce4102cfed4d 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -1249,6 +1249,9 @@ bool ath11k_core_coldboot_cal_support(struct ath11k_base *ab);
 
 const struct firmware *ath11k_core_firmware_request(struct ath11k_base *ab,
 						    const char *filename);
+void ath11k_core_create_firmware_path(struct ath11k_base *ab,
+				      const char *filename,
+				      void *buf, size_t buf_len);
 
 static inline const char *ath11k_scan_state_str(enum ath11k_scan_state state)
 {
@@ -1295,14 +1298,6 @@ static inline struct ath11k *ath11k_ab_to_ar(struct ath11k_base *ab,
 	return ab->pdevs[ath11k_hw_mac_id_to_pdev_id(&ab->hw_params, mac_id)].ar;
 }
 
-static inline void ath11k_core_create_firmware_path(struct ath11k_base *ab,
-						    const char *filename,
-						    void *buf, size_t buf_len)
-{
-	snprintf(buf, buf_len, "%s/%s/%s", ATH11K_FW_DIR,
-		 ab->hw_params.fw.dir, filename);
-}
-
 static inline const char *ath11k_bus_str(enum ath11k_bus bus)
 {
 	switch (bus) {
-- 
2.25.1