Re: [PATCH RFT v2 5/5] i3c: cdns: use get_parity8 helper instead of open coding it

[Geert Uytterhoeven]

Hi Wolfram,

On Sun, Dec 29, 2024 at 11:13 AM Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
> The kernel has now a generic helper for getting parity with easier to
> understand semantics. Make use of it.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>

Thanks for your patch!

> --- a/drivers/i3c/master/i3c-master-cdns.c
> +++ b/drivers/i3c/master/i3c-master-cdns.c
> @@ -889,8 +889,7 @@ static u32 prepare_rr0_dev_address(u32 addr)
>         ret |= (addr & GENMASK(9, 7)) << 6;
>
>         /* RR0[0] = ~XOR(addr[6:0]) */
> -       if (!(hweight8(addr & 0x7f) & 1))
> -               ret |= 1;
> +       ret |= parity8(addr & 0x7f) ? 0 : BIT(0);

Perhaps keep the if()-construct, to better match the example in the
documentation in 1/5?

>
>         return ret;
>  }

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