linux-kernel - Re: [RFT 06/11] mmc: sdhci-brcmstb: Simplify with optional clock and dev_err

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Message-ID: <CAPDyKFrp3GLLTjdSroyB9_QOcGM=JkFcsv3Chfgu2FSfATxGqg@mail.gmail.com>
Date:   Thu, 3 Sep 2020 10:09:53 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Jun Nie <jun.nie@...aro.org>, Shawn Guo <shawnguo@...nel.org>,
        Paul Cercueil <paul@...pouillou.net>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Al Cooper <alcooperx@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michal Simek <michal.simek@...inx.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-rpi-kernel@...ts.infradead.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: [RFT 06/11] mmc: sdhci-brcmstb: Simplify with optional clock and dev_err_probe()

On Wed, 2 Sep 2020 at 21:58, Florian Fainelli <f.fainelli@...il.com> wrote:
>
>
>
> On 9/2/2020 12:36 PM, Krzysztof Kozlowski wrote:
> > Only -ENOENT from devm_clk_get() means that clock is not present in
> > device tree.  Other errors have their own meaning and should not be
> > ignored.
> >
> > Simplify getting the clock which is in fact optional and also use
> > dev_err_probe() for handling deferred.
> >
> > Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
>
> This is actually an open coded version of devm_clk_get_optional(), so
> this is fine:

devm_clk_get_optional() treats -ENOENT specifically, so it's not an
exact open coded version. I think that's why Krzysztof prefered to get
it tested on HW.

>
> Acked-by: Florian Fainelli <f.fainelli@...il.com>

Thanks!

I am queuing this up for next, without waiting for explicit tests .
There is time to get that from testing in linux-next anyway.

Kind regards
Uffe