RK3568+AP6256调试笔记

最新推荐文章于 2025-06-27 16:54:14 发布

Calvin.chen

最新推荐文章于 2025-06-27 16:54:14 发布

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文章标签： linux linux驱动开发

本文链接：https://blog.youkuaiyun.com/Calvinlove2/article/details/148735368

AP6256是正基科技推出的一款低成本，低功耗的双模模块。是一款SDIO接口单通道802.11ac双频支持BT5.0 蓝牙WiFi二合一模块。

Model：AP6256：SDIO WIFI + UART BT

1、内核配置选择编为模块(个人选择，编译到内核中也行)

wifi配置

2、查看原理图引脚复用：

因为原理图中WL_HOST_WAKE和BT_HOST_WAKE引脚硬件未连接，DTS中去除了相关引脚配置。并且需要配置kernel/drivers/net/wireless/rockchip_wlan/rkwifi/bcmdhd/Makefile中CONFIG_BCMDHD_OOB=n。

SDIO3.0 引脚1.8V SDIO2.0 3.3V //设备树中sd-uhs-sdr104节点和max-frequency节点相关

3、修改设备树

/* SDIO节点 */

&sdmmc1 {
max-frequency = <20000000>; //本硬件限制最大24M，3.3v转1.8v模块限制
supports-sdio;
bus-width = <4>;
disable-wp;
cap-sd-highspeed;
cap-sdio-irq;
keep-power-in-suspend;
mmc-pwrseq = <&sdio_pwrseq>;
non-removable;
num-slots = <1>;
pinctrl-names = "default";
pinctrl-0 = <&sdmmc1_bus4 &sdmmc1_cmd &sdmmc1_clk>;
sd-uhs-sdr104; //1.8v SDIO3.0 3.3v SDIO2.0 需要去除此项
status = "okay";
};

sdio_pwrseq: sdio-pwrseq {
       status = "okay";
       compatible = "mmc-pwrseq-simple";
       clocks = <&clk32k>; //外部32K时钟
       clock-names = "ext_clock";
       pinctrl-names = "default";
       pinctrl-0 = <&wifi_reg_on>;
       post-power-on-delay-ms = <200>;
       reset-gpios = <&gpio3 RK_PD4 GPIO_ACTIVE_LOW>;
   };

/* wifi节点 */

   wireless_wlan: wireless-wlan {
       compatible = "wlan-platdata";
       rockchip,grf = <&grf>;
       wifi_chip_type = "ap6256";
       status = "okay";
   };

/* 蓝牙节点 */

   wireless_bluetooth: wireless-bluetooth {
       compatible = "bluetooth-platdata";
       //wifi-bt-power-toggle;
       status = "okay";
       clocks = <&clk32k>;  //外部32K时钟
       clock-names = "ext_clock";
       uart_rts_gpios = <&gpio2 RK_PB5 GPIO_ACTIVE_LOW>;
       pinctrl-names = "default", "rts_gpio";
       pinctrl-0 = <&uart1m0_rtsn>, <&bt_power_en_gpio>;
       pinctrl-1 = <&uart1m0_xfer>;
       BT,power_gpio = <&gpio3 RK_PD1 GPIO_ACTIVE_HIGH>;
   };