linux-kernel - Re: [PATCH] arm64: dts: hikey: Define wl1835 power capabilities

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Date:   Mon, 25 Jun 2018 14:56:02 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Ryan Grachek <ryan@...ted.us>
Cc:     Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Tony Lindgren <tony@...mide.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Wei Xu <xuwei5@...ilicon.com>, Eyal Reizer <eyalr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        Valentin Schneider <Valentin.Schneider@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-wireless@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: hikey: Define wl1835 power capabilities

On Wed, Jun 13, 2018 at 11:30 AM, John Stultz <john.stultz@...aro.org> wrote:
> On Wed, Jun 13, 2018 at 8:13 AM, Ryan Grachek <ryan@...ted.us> 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.
>>
>> Signed-off-by: Ryan Grachek <ryan@...ted.us>
>
> Fixes: 60f36637bbbd ("wlcore: sdio: allow pm to handle sdio power")
> Tested-by: John Stultz <john.stultz@...aro.org>
> Acked-by: John Stultz <john.stultz@...aro.org>
>
> Wei Xu: This fixes a functional regression with wifi on the HiKey
> board that was introduced in 4.18-rc with commit 60f36637bbbd
> ("wlcore: sdio: allow pm to handle sdio power").

Wei Xu: Just wanted to follow up to make sure this wasn't missed for
4.18-rc, as I haven't seen it upstream or in -next, and it fixes a
recently introduced regression.

thanks
-john