Hi Prabhakar,
On Tue, 18 Feb 2025 at 12:44, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Move the `PLL_CLK_ACCESS()`, `PLL_CLK1_OFFSET()`, and `PLL_CLK2_OFFSET()`
> macros from `rzv2h-cpg.h` to `rzv2h-cpg.c`, as they are not intended for
> use by SoC-specific CPG drivers.
>
> Additionally, update `PLL_CLK1_OFFSET()` and `PLL_CLK2_OFFSET()` to use
> the `FIELD_GET()` macro for better readability and simplify the
> `PLL_CLK_ACCESS()` macro.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
Thanks for your patch!
The changes look correct to me, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
but I still have some comments...
> --- a/drivers/clk/renesas/rzv2h-cpg.c
> +++ b/drivers/clk/renesas/rzv2h-cpg.c
> @@ -56,6 +56,10 @@
>
> #define CPG_CLKSTATUS0 (0x700)
>
> +#define PLL_CLK_ACCESS(n) (!!((n) & BIT(31)))
OK
> +#define PLL_CLK1_OFFSET(n) FIELD_GET(GENMASK(15, 0), (n))
> +#define PLL_CLK2_OFFSET(n) (PLL_CLK1_OFFSET(n) + (0x4))
IMO, the original versions are more readable, as they clearly show
the symmetry between encoding and decoding.
Perhaps a good alternative would be a structure with bitfields and
a PACK() macro, like is used for DDIV and SMUX?
> +
> /**
> * struct rzv2h_cpg_priv - Clock Pulse Generator Private Data
> *
> diff --git a/drivers/clk/renesas/rzv2h-cpg.h b/drivers/clk/renesas/rzv2h-cpg.h
> index fd8eb985c75b..81f44b94f6d5 100644
> --- a/drivers/clk/renesas/rzv2h-cpg.h
> +++ b/drivers/clk/renesas/rzv2h-cpg.h
> @@ -87,9 +87,6 @@ enum clk_types {
>
> /* BIT(31) indicates if CLK1/2 are accessible or not */
> #define PLL_CONF(n) (BIT(31) | ((n) & ~GENMASK(31, 16)))
> -#define PLL_CLK_ACCESS(n) ((n) & BIT(31) ? 1 : 0)
> -#define PLL_CLK1_OFFSET(n) ((n) & ~GENMASK(31, 16))
> -#define PLL_CLK2_OFFSET(n) (((n) & ~GENMASK(31, 16)) + (0x4))
>
> #define DEF_TYPE(_name, _id, _type...) \
> { .name = _name, .id = _id, .type = _type }
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
