linux-kernel - Re: [PATCH 3/3] ARM: dts: sunxi: enable SDIO Wi-Fi on Orange Pi Zero

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Message-ID: <CAGb2v64taF9x9MDYW+KUEEUUoSx0bF68QNc7uZXQoNrsozMGtg@mail.gmail.com>
Date:   Wed, 23 Nov 2016 22:25:57 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Icenowy Zheng <icenowy@...c.xyz>, Jonathan Corbet <corbet@....net>,
        Chen-Yu Tsai <wens@...e.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Hans de Goede <hdegoede@...hat.com>,
        Vishnu Patekar <vishnupatekar0510@...il.com>,
        Andre Przywara <andre.przywara@....com>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH 3/3] ARM: dts: sunxi: enable SDIO Wi-Fi on Orange Pi Zero

On Wed, Nov 23, 2016 at 3:59 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> Hi,
>
> On Tue, Nov 22, 2016 at 12:24:21AM +0800, Icenowy Zheng wrote:
>> There's a Allwinner's XR819 SDIO Wi-Fi module soldered on the board of
>> Orange Pi Zero, which used a dedicated regulator to power.
>>
>> Add the device tree node of the regulator, the enable gpio (with
>> mmc-pwrseq) and the sdio controller.
>>
>> There's a out-of-tree driver tested to work with this device tree.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
>> ---
>> New patch in the patchset, since a out-of-tree working xradio driver is done.
>>
>> If there is any problem in this patch, it can be omitted.
>
> No particular problem with this one, however it can and should be
> merged with the previous one.
>
> Minor comments below though.
>
>>
>>  arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts | 42 ++++++++++++++++++++++++
>>  1 file changed, 42 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
>> index b428e47..39cac26 100644
>> --- a/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
>> +++ b/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
>> @@ -79,6 +79,24 @@
>>                       gpios = <&pio 0 17 GPIO_ACTIVE_HIGH>;
>>               };
>>       };
>> +
>> +     reg_vcc_wifi: reg_vcc_wifi {
>> +             compatible = "regulator-fixed";
>> +             pinctrl-names = "default";
>> +             pinctrl-0 = <&vcc_wifi_pin_opi0>;
>> +             regulator-min-microvolt = <3300000>;
>> +             regulator-max-microvolt = <3300000>;
>> +             regulator-name = "vcc-wifi";
>> +             enable-active-high;
>> +             gpio = <&pio 0 20 GPIO_ACTIVE_HIGH>;
>> +     };
>> +
>> +     wifi_pwrseq: wifi_pwrseq {
>> +             compatible = "mmc-pwrseq-simple";
>> +             pinctrl-names = "default";
>> +             pinctrl-0 = <&wifi_pwrseq_pin_opi0>;
>> +             reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
>> +     };
>>  };
>>
>>  &ehci1 {
>> @@ -95,6 +113,20 @@
>>       status = "okay";
>>  };
>>
>> +&mmc1 {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&mmc1_pins_a>;
>> +     vmmc-supply = <&reg_vcc_wifi>;
>> +     mmc-pwrseq = <&wifi_pwrseq>;
>> +     bus-width = <4>;
>> +     non-removable;
>> +     status = "okay";
>> +};
>> +
>> +&mmc1_pins_a {
>> +     allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
>
> This should be bias-pull-up.

IIRC I already added this for _all_ existing mmc pinmux settings?

>
>> +};
>> +
>>  &ohci1 {
>>       status = "okay";
>>  };
>> @@ -104,6 +136,11 @@
>>               pins = "PA17";
>>               function = "gpio_out";
>>       };
>> +
>> +     vcc_wifi_pin_opi0: vcc_wifi_pin@0 {
>> +             allwinner,pins = "PA20";
>
> This should be pins
>
>> +             allwinner,function = "gpio_out";
>
> This should be function
>
>> +     };
>>  };
>>
>>  &r_pio {
>> @@ -111,6 +148,11 @@
>>               pins = "PL10";
>>               function = "gpio_out";
>>       };
>> +
>> +     wifi_pwrseq_pin_opi0: wifi_pwrseq_pin@0 {
>> +             allwinner,pins = "PL7";
>> +             allwinner,function = "gpio_out";
>
> And same thing here.

Might we do away with the pinmux for gpio pins tradition?
Recent patches I've sent all omit them.

ChenYu