* Qualcomm WCNSS Platform Driver

WCNSS driver is the platform driver. It is used for performing the cold
boot-up of the wireless device. It is responsible for adjusting
the necessary I/O rails and enabling appropriate gpios for wireless
connectivity subsystem.

Required properties:
- compatible: "wcnss_wlan"
- reg: physical address and length of the register set for the device.
- reg-names: "wcnss_mmio", "wcnss_fiq"
- interupts: Pronto to Apps interrupts for tx done and rx pending.
- qcom,pronto-vddmx-supply: regulator to supply pronto pll.
- qcom,pronto-vddcx-supply: regulator to supply WLAN/BT/FM digital module.
- qcom,pronto-vddpx-supply: regulator to supply WLAN DAC.
- qcom,iris-vddxo-supply  : regulator to supply RF XO.
- qcom,iris-vddrfa-supply : regulator to supply RFA digital.
- qcom,iris-vddpa-supply  : regulator to supply RF PA.
- qcom,iris-vdddig-supply : regulator to supply RF digital(BT/FM).
- gpios: gpio numbers to configure 5-wire interface of WLAN connectivity
- qcom,has-48mhz-xo: boolean flag to determine the usage of 24MHz XO from RF
- qcom,has-pronto-hw: boolean flag to determine the revId of the WLAN subsystem

Optional properties:
- qcom,has-autodetect-xo: boolean flag to determine whether Iris XO auto detect
should be performed during boot up.
- qcom,wlan-rx-buff-count: WLAN RX buffer count is a configurable value,
using a smaller count for this buffer will reduce the memory usage.

Example:

    qcom,wcnss-wlan@fb000000 {
        compatible = "qcom,wcnss_wlan";
        reg = <0xfb000000 0x280000>,
              <0xf9011008 0x04>;
        reg-names = "wcnss_mmio", "wcnss_fiq";
        interrupts = <0 145 0 0 146 0>;
        interrupt-names = "wcnss_wlantx_irq", "wcnss_wlanrx_irq";

        qcom,pronto-vddmx-supply = <&pm8841_s1>;
        qcom,pronto-vddcx-supply = <&pm8841_s2>;
        qcom,pronto-vddpx-supply = <&pm8941_s3>;
        qcom,iris-vddxo-supply = <&pm8941_l6>;
        qcom,iris-vddrfa-supply = <&pm8941_l11>;
        qcom,iris-vddpa-supply = <&pm8941_l19>;
        qcom,iris-vdddig-supply = <&pm8941_l3>;

        gpios = <&msmgpio 36 0>, <&msmgpio 37 0>, <&msmgpio 38 0>,
                <&msmgpio 39 0>, <&msmgpio 40 0>;
        qcom,has-48mhz-xo;
        qcom,has-pronto-hw;
    };