linux-kernel - Re: [PATCH 2/3] platform: surface: Add surface xbl

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Message-ID: <87fsskqvvc.fsf@kernel.org>
Date:   Fri, 29 Oct 2021 07:45:28 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Jarrett Schultz <jaschultzms@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>,
        Maximilian Luz <luzmaximilian@...il.com>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jarrett Schultz <jaschultz@...rosoft.com>
Subject: Re: [PATCH 2/3] platform: surface: Add surface xbl


Hi,

Andy Shevchenko <andy.shevchenko@...il.com> writes:
>  diff --git a/drivers/platform/surface/surface-xbl.c b/drivers/platform/surface/surface-xbl.c
>  new file mode 100644
>  index 000000000000..910287f0c987
>  --- /dev/null
>  +++ b/drivers/platform/surface/surface-xbl.c
>  @@ -0,0 +1,223 @@
>  +// SPDX-License-Identifier: GPL-2.0-only
>  +/*
>  + * surface-xbl.c - Surface E(x)tensible (B)oot(l)oader
>  + *
>
> First of all, do not include filename in the file.
>
> Capital L will be better to read and understand the
> abbreviation. Actually usually we do something like this:
>
> Extensible Boot Loader (EBL)

nah, this is silly Andy. It's just capitalized as eXtensible Boot
Loader, very much akin to eXtensible Host Controller Interface.

>  +static const struct attribute_group inputs_attr_group = {
>  +       .attrs = inputs_attrs,
>  +};
>  +
>  +static u8 surface_xbl_readb(void __iomem *base, u32 offset)
>  +{
>  +       return readb(base + offset);
>  +}
>  +
>  +static u16 surface_xbl_readw(void __iomem *base, u32 offset)
>  +{
>  +       return readw(base + offset);
>  +}
>
> Either use corresponding io accessors in-line, or make first parameter
> to be sirface_xbl pointer. Otherwise these helpers useless.

I agree with passing surface_xbl point as first parameter, but calling
the accessors pointless is a bit much. At a minimum, they make it easier
to ftrace the entire driver by simply ftracing surface_xbl_*

-- 
balbi