Re: SDIO - High Speed - iMX6

[John Tobias <john.tobias.ph@xxxxxxxxx>]

Hi Fabio,

In order NOT to permit the SDIO core controller to communicate in 3.3v
signal voltage, you need to define the vqmmc, voltage-ranges and vmmc
(see the example below).
I've tested this settings on 3.19 kernel and able to backport on 3.13.


wlan_en_reg: fixedregulator {
        compatible = "regulator-fixed";
        regulator-name = "wlan-en-regulator";
        regulator-min-microvolt = <1800000>;
        regulator-max-microvolt = <1800000>;

        enable-active-high;
        regulator-always-on;
    };

    reg_1p8v: 1p8v {
        compatible = "regulator-fixed";
        regulator-name = "1p8v";
        regulator-min-microvolt = <1800000>;
        regulator-max-microvolt = <1800000>;
    };

/* WiLink8 WIFI module */
&usdhc2 {
    status = "okay";
    vmmc-supply = <&wlan_en_reg>;
    vqmmc-supply = <&reg_1p8v>;
    voltage-ranges = <1800 1800>;

};

Regards,

John


On Tue, Feb 17, 2015 at 10:59 AM, Fabio Estevam <festevam@xxxxxxxxx> wrote:
> On Sun, Feb 15, 2015 at 4:54 AM, John Tobias <john.tobias.ph@xxxxxxxxx> wrote:
>> Hi Fabio,
>>
>> I was able to work it.
>
> Care to share the solution?
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