mjhjmtu

I have a RK3288 based custom board with AP6212A wifi/bt chipset. I am using rockhip-linux 4.4 with bcmdhd driver. It is using the SDIO protocol. After the driver loads the kernel freezes when it tries to execute the command "WLC_UP" anywhere in the driver.

dhd_conf_set_intiovar(dhd, WLC_UP, "up", 0, 0, FALSE);

The console gets frozen and also HDMI is freezes as well. If I comment the lines with WLC_UP in the driver, then I get a normal boot and also wlan0 gets registered and is up but cannot scan or connect to wifi.

Here is the dts snippet for sdio and wireless section:

wireless-bluetooth 
 compatible = "bluetooth-platdata";
 clocks = <&rk818 1>;
 clock-names = "ext_clock";
 uart_rts_gpios = <&gpio4 19 GPIO_ACTIVE_LOW>;
 pinctrl-names = "default", "rts_gpio";
 pinctrl-0 = <&uart0_rts>;
 pinctrl-1 = <&uart0_gpios>;
 BT,reset_gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
 BT,wake_gpio = <&gpio4 26 GPIO_ACTIVE_HIGH>;
 BT,wake_host_irq = <&gpio4 31 GPIO_ACTIVE_HIGH>;
 status = "okay";
;

wireless-wlan 
 compatible = "wlan-platdata";
 rockchip,grf = <&grf>;
 wifi_chip_type = "ap6212";
 sdio_vref = <1800>;
 WIFI,host_wake_irq = <&gpio4 30 GPIO_ACTIVE_HIGH>;
 status = "okay";
;

&sdio0 

 clock-frequency = <50000000>;
 clock-freq-min-max = <200000 50000000>;

 bus-width = <4>;
 cap-sd-highspeed;
 cap-sdio-irq;
 disable-wp;
 ignore-pm-notify;
 keep-power-in-suspend;
 mmc-pwrseq = <&sdio_pwrseq>;
 non-removable;
 num-slots = <1>;
 pinctrl-names = "default";
 pinctrl-0 = <&sdio0_bus4 &sdio0_cmd &sdio0_clk &sdio0_int>;
 sd-uhs-sdr104;
 supports-sdio;
 vmmc-supply = <&vcc_wlin>;
 vqmmc-supply = <&vccio_wl>;
 status = "okay";

;