Re: [PATCH v2 11/11] arm64: allwinner: a64: enable Wi-Fi for Pine64

Andreas Färber
2017-04-14T16:56:16Z

Hi,

Am 07.04.2017 um 20:34 schrieb Icenowy Zheng:
> The Wi-Fi modules of Pine64 is powered via DLDO4 and ELDO1 (the latter

"modules ... are" or "module ... is"

> one provides I/O voltage).
>
> Add device node for it.
>
> Signed-off-by: Icenowy Zheng <icenowy-h8G6r0blFSE@public.gmane.org>
> ---
> arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts
> index 7da074f95065..9d90bb32aa87 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts
> @@ -64,6 +64,11 @@
> regulator-min-microvolt = <3300000>;
> regulator-max-microvolt = <3300000>;
> };
> +
> + wifi_pwrseq: wifi_pwrseq {
> + compatible = "mmc-pwrseq-simple";
> + reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
> + };
> };
>
> &ehci1 {
> @@ -91,6 +96,17 @@
> status = "okay";
> };
>
> +&mmc1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&mmc1_pins>;
> + vmmc-supply = <&reg_dldo4>;
> + vqmmc-supply = <&reg_eldo1>;
> + mmc-pwrseq = <&wifi_pwrseq>;
> + non-removable;
> + bus-width = <4>;
> + status = "okay";
> +};

As you mention above, Wi-Fi is a module, so may be absent. Is it really
correct to enable this node and hardcode a certain power sequence? In
theory other modules could be attached.

To me that calls for an overlay instead.

> +
> &ohci1 {
> status = "okay";
> };

Regards,
Andreas

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