说明
RK3576 适配 infineon的 aw-xb327ma-pur PCIE接口的WiFi模块，内部的芯片是CYW5557X_PCIE。
步骤
RK常用的适配过的WIFI，蓝牙模块驱动和固件一般都会放到他的仓库里面，buildroot里面直接有的，所以只要设备树配置下引脚，SDK配置下模块信息，修改下编译脚本即可。
设备树修改：
wifi的引脚使用了xl9555的外置引脚，这个驱动也写过见其他随笔。
wireless_bluetooth: wireless-bluetooth {compatible = "bluetooth-platdata";bt_port = "/dev/ttyS4";uart_rts_gpios = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;pinctrl-names = "default", "rts_gpio";pinctrl-0 = <&uart4m1_rtsn>, <&bt_reset_gpio>, <&bt_wake_gpio>, <&bt_irq_gpio>;pinctrl-1 = <&uart4_gpios>;BT,reset_gpio = <&gpio3 RK_PA1 GPIO_ACTIVE_LOW>;BT,wake_gpio = <&gpio1 RK_PD2 GPIO_ACTIVE_HIGH>;BT,wake_host_irq = <&gpio3 RK_PA0 GPIO_ACTIVE_HIGH>;status = "disabled";};wireless_wlan: wireless-wlan {compatible = "wlan-platdata";wifi_chip_type = "CYW5557X";// pinctrl-names = "default";// pinctrl-0 = <&wifi_host_wake_irq>;WIFI,host_wake_irq = <&xl9555_ext_gpio 1 GPIO_ACTIVE_HIGH>;WIFI,poweren_gpio = <&xl9555_ext_gpio 0 GPIO_ACTIVE_LOW>;status = "okay";};
仓库位置：
buildroot/output/rockchip_rk3576/build/rkwifibt-1.0.0
文件夹树状图：
$/sdk/buildroot/output/rockchip_rk3576/build/rkwifibt-1.0.0$ tree -d -L 2
.
├── bin
│ ├── arm
│ └── arm64
├── build
│ ├── brcm_patchram_plus1.p
│ ├── dhd_priv.p
│ ├── meson-info
│ ├── meson-logs
│ ├── meson-private
│ ├── rk_hciattach.p
│ └── rtk_hciattach.p
├── conf
├── debian
├── drivers
│ ├── aic8800d80x2_pcie
│ ├── aic8800_pcie
│ ├── aic8800_sdio
│ ├── aic8800_usb
│ ├── aic_btusb
│ ├── aw-xb327ma-pur
│ ├── bcmdhd
│ ├── bluetooth_uart_driver
│ ├── bluetooth_usb_driver
│ ├── infineon
│ ├── rk960
│ ├── rtl8188fu
│ ├── rtl8189fs
│ ├── rtl8723ds
│ ├── rtl8821cs
│ ├── rtl8822cs
│ ├── rtl8852be
│ └── rtl8852bs
├── firmware
│ ├── aic
│ ├── broadcom
│ ├── infineon
│ ├── realtek
│ └── rockchip
├── scripts
└── tools├── brcm_tools├── rk-hciattach└── rtk_hciattach43 directories
我们的驱动位置：
buildroot/output/rockchip_rk3576/build/rkwifibt-1.0.0/drivers/aw-xb327ma-pur
我们的编译脚本修改
SDK\device\rockchip\common\scripts\post-wifibt.sh
--- /dev/null
+++ b/.chips/rk3576/rockchip_rk3576_qiyang_defconfig
@@ -0,0 +1,4 @@
+RK_WIFIBT_CHIP="AW-XB327MA-PUR"
+RK_UBOOT_SPL=y
+RK_KERNEL_DTS_NAME="rk3576-Customers"
+RK_USE_FIT_IMG=y
diff --git a/common/scripts/post-wifibt.sh b/common/scripts/post-wifibt.sh
index 697f4e6..a822970 100755
--- a/common/scripts/post-wifibt.sh
+++ b/common/scripts/post-wifibt.sh
@@ -288,6 +288,11 @@ build_wifibt()if [[ "$RK_WIFIBT_MODULES" = "RTL8852BE" ]];then$KMAKE M=$RKWIFIBT_DIR/drivers/rtl8852be modulesfi
+
+ if [[ "$RK_WIFIBT_MODULES" = "AW-XB327MA-PUR" ]];then
+ message "Rebuilding aw-xb327ma-pur driver"
+ $KMAKE M=$RKWIFIBT_DIR/drivers/aw-xb327ma-pur clean
+ $KMAKE M=$RKWIFIBT_DIR/drivers/aw-xb327ma-pur modules
+ fi
+ fiecho "building realtek bt drivers"$KMAKE M=$RKWIFIBT_DIR/drivers/bluetooth_uart_driver
@@ -481,6 +486,15 @@ build_wifibt()cp $RKWIFIBT_DIR/drivers/aic_btusb/*.ko \$TARGET_DIR/lib/modules/fi
+
+ if [[ "$RK_WIFIBT_MODULES" =~ "AW-XB327MA-PUR" ]];then
+ message "Copy AW-XB327MA-PUR file to rootfs"
+ cp $RKWIFIBT_DIR/firmware/infineon/$RK_WIFIBT_MODULES/wifi/* \
+ $TARGET_DIR/lib/firmware/
+ cp $RKWIFIBT_DIR/firmware/infineon/$RK_WIFIBT_MODULES/bt/* \
+ $TARGET_DIR/lib/firmware/
+ cp $RKWIFIBT_DIR/drivers/aw-xb327ma-pur/*.ko $TARGET_DIR/lib/modules/
+ fi# Install boot servicesinstall_sysv_service $RKWIFIBT_DIR/S36wifibt-init.sh S
然后重新编译buildroot即可。