linux-kernel - Re: [PATCH] PCI: rcar: avoid defines prefixed with CONFIG

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Date:   Fri, 13 Jan 2023 17:30:24 +0100
From:   Lorenzo Pieralisi <lpieralisi@...nel.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: rcar: avoid defines prefixed with CONFIG

On Fri, Jan 13, 2023 at 10:05:09AM +0100, Geert Uytterhoeven wrote:
> Hi Lukas,
> 
> On Fri, Jan 13, 2023 at 9:52 AM Lukas Bulwahn <lukas.bulwahn@...il.com> wrote:
> > Defines prefixed with "CONFIG" should be limited to proper Kconfig options,
> > that are introduced in a Kconfig file.
> >
> > Here, a definition for a bitmask to configure the SEND_ENABLE mode is named
> > CONFIG_SEND_ENABLE.
> >
> > Rename this local definition to CONFIGURE_SEND_ENABLE to avoid defines
> > prefixed with "CONFIG".
> >
> > No functional change.
> >
> > Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
> 
> Thanks for your patch!
> 
> > --- a/drivers/pci/controller/pcie-rcar.h
> > +++ b/drivers/pci/controller/pcie-rcar.h
> > @@ -11,7 +11,7 @@
> >
> >  #define PCIECAR                        0x000010
> >  #define PCIECCTLR              0x000018
> > -#define  CONFIG_SEND_ENABLE    BIT(31)
> > +#define  CONFIGURE_SEND_ENABLE BIT(31)
> 
> The R-Car Gen3 rev. 2.30 Hardware User's Manual calls the bit "CCIE".
> 
> Hence if I would have written the driver, I would have used
> 
>     #define PCIECCTLR_CCIE     BIT(31)   /* Configuration Send Enable */

Should I change it when I merge it ? That makes sense actually.

Thanks,
Lorenzo

> >  #define  TYPE0                 (0 << 8)
> >  #define  TYPE1                 BIT(8)
> >  #define PCIECDR                        0x000020
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds