[RFC PATCH] ARM: dts: rockchip: Add wifi support for firefly

[Michael Trimarchi]

Hi Heiko

Sorry for long delay, the product was moved from rk3288 to imx6

I will rebase everything and use your patches soon and test

Michael

On Sun, Aug 9, 2015 at 9:17 PM, Heiko Stübner <heiko at sntech.de> wrote:
> Hi Michael,
>
> Am Sonntag, 9. August 2015, 10:26:44 schrieb Michael Trimarchi:
>
> [...]
>
>> > >   num-slots = <1>;
>> > >   pinctrl-names = "default";
>> > >
>> > > - pinctrl-0 = <&sdio0_bus4>, <&sdio0_cmd>, <&sdio0_clk>;
>> > > - vmmc-supply = <&vcc_18>;
>> > > + pinctrl-0 = <&sdio0_bus4>, <&sdio0_cmd>, <&sdio0_clk>, <&sdio0_int>;
>> > > +
>> > > + sd-uhs-sdr50;
>> > > + sd-uhs-sdr104;
>> > > + sd-uhs-ddr50;
>> >
>> > we don't have mmc tuning capabilities yet, so please no sd-uhs-* stuff.
>> > That way you should also be able to leave out the clock-freq-min-max
>> > above, as regular "highspeed" does not venture above the 50MHz limit.
>>
>> Ok, I have tested without it too and it works with a small hack on the code.
>> Agree with you
>
> what was this supposed to fix? And what "hack" do you use now?
>
>
>> > > + cap-sdio-irq;
>> > > +
>> > > + vmmc-supply = <&vcc_wifi>;
>> >
>> > the original supply is actually wrong in the dts. vcc_18 is the io voltage
>> > used on the
>> > pins _to_ the card, not to supply the card itself. So vcc_18 is actually
>> > the so called vqmmc-supply.
>> > vmmc-supply is done regularly from vcc_io. So your voltage hack above can
>> > go away too.
>> >
>> > Bringup should also use a mmc-power-sequency so you can make sure the
>> > rtc_clock is running, which is also needed by the wifi module.
>>
>> Hack is used to because when sdio subsystem compare the wifi voltage
>> capability returned by a specific message on the bus with the possible
>> voltage levels that hardware connection provides and take the minimal. The
>> card return to support from 2V up and this is the reason to declare it at
>> 2V. I will retest again
>
> after the supplies are corrected (see vmmc and vqmmc in the patches) the
> supply for the modules should actually be read as the 3.3V that are supplying
> it (from vcc_io ... which is called vbat_wl in the schematics).
>
>
>> > >   status = "okay";
>> >
>> > missing #address-cells and #size-cells values for the subnodes
>>
>> Correct
>>
>> > > +
>> > > + brcmf: bcrmf at 0 {
>> > > +         compatible = "brcm,bcm4329-fmac";
>> > > +         interrupt-parent = <&gpio4>;
>> > > +         reg = <0>;
>> > > +         interrupts = <30 IRQ_TYPE_EDGE_FALLING>;
>> > > +         interrupt-names = "host-wake";
>> > > +         status = "okay";
>> > > + };
>> > >
>> > >  };
>> > >
>> > >  &sdmmc {
>> >
>> > I took the liberty to move stuff around how it should look like, but did
>> > not find the time to actually test this. So maybe you can take a look at
>> > the attached patches.
>>
>> Perfect, I will retest as soon as I can and go back to you. Right now
>> I have two hardware design around firefly that use the wifi
>
> great
>
>
> Heiko



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| Michael Nazzareno Trimarchi                     Amarula Solutions BV |
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