linux-kernel - Re: [PATCH v2 3/6] clk: renesas: rzv2h: Simplify BUS

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Message-ID: <CAMuHMdVfcqHVkJ3ea=uN7zGAw=ho=gLGVJjFFB_O82C-RTU11Q@mail.gmail.com>
Date: Fri, 27 Dec 2024 15:33:21 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, 
	linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 3/6] clk: renesas: rzv2h: Simplify BUS_MSTOP macros and
 field extraction

Hi Prabhakar,

On Mon, Dec 23, 2024 at 6:37 PM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Replace manual bit manipulation in `BUS_MSTOP` with `FIELD_PREP_CONST` and
> `FIELD_GET` macros for better clarity and maintainability. Introduce
> explicit masks (`BUS_MSTOP_IDX_MASK`, `BUS_MSTOP_BITS_MASK`) to improve
> readability.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Thanks for your patch!

> --- a/drivers/clk/renesas/rzv2h-cpg.c
> +++ b/drivers/clk/renesas/rzv2h-cpg.c
> @@ -582,8 +582,8 @@ static struct rzv2h_mstop
>         if (!mstop)
>                 return NULL;
>
> -       mstop->idx = (mstop_data >> 16) & 0xffff;
> -       mstop->mask = mstop_data & 0xffff;
> +       mstop->idx = FIELD_GET(BUS_MSTOP_IDX_MASK, (mstop_data));
> +       mstop->mask = FIELD_GET(BUS_MSTOP_BITS_MASK, (mstop_data));

Nit: no need for the parentheses around mstop_data.

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

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