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Date:   Wed, 13 Jun 2018 13:19:51 -0500
From:   Ryan Grachek <ryan@...ted.us>
To:     Valentin Schneider <valentin.schneider@....com>
Cc:     Wei Xu <xuwei5@...ilicon.com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH] arm64: dts: hikey: Define wl1835 power capabilities

Hi Valentin,

On Wed, Jun 13, 2018 at 12:34 PM, Valentin Schneider
<valentin.schneider@....com> wrote:
> Hi,
>
> On 13/06/18 16:13, Ryan Grachek wrote:
>> These properties are required for compatibility with runtime PM.
>> Without these properties, MMC host controller will not be aware
>> of power capabilities. When the wlcore driver attempts to power
>> on the device, it will erroneously fail with -EACCES.
>>
>
> I don't have a hikey620 to test this, but the hikey960 is suffering from the
> same issue (see [1]). I added these properties to the dwmmc2 node of the
> hikey960 (see snippet) and wlan0 does show up. Would you mind sending a
> similar patch for that board ?
>
> Thanks !
>
> Valentin
>
> [1]: https://lkml.org/lkml/2018/6/12/930
>
> --->8
>
> diff --git a/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts b/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts
> index 85aadf1b..c706f70 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts
> +++ b/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts
> @@ -613,6 +613,8 @@
>         vmmc-supply = <&wlan_en>;
>         ti,non-removable;
>         non-removable;
> +       cap-power-off-card;
> +       keep-power-in-suspend;
>         #address-cells = <0x1>;
>         #size-cells = <0x0>;
>         status = "ok";

Not a problem. The patch can be found here:
https://patchwork.kernel.org/patch/10462767/

Ryan

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