Re: [PATCH v3 0/2] Enable 64-bit polling mode for R-Car Gen3 and RZ/G2+ family

[Geert Uytterhoeven]

Hi Biju,

On Wed, 30 Jul 2025 at 18:46, Biju <biju.das.au@xxxxxxxxx> wrote:
> From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
>
> As per the RZ/{G2L,G3E} HW manual SD_BUF0 can be accessed by 16/32/64
> bits. Most of the data transfer in SD/SDIO/eMMC mode is more than 8 bytes.
> During testing it is found that, if the DMA buffer is not aligned to 128
> bit it fallback to PIO mode. In such cases, 64-bit access is much more
> efficient than the current 16-bit.

Thanks for your series!

I believe some of the SoCs that do not support 64-bit accesses, do
support 32-bit accesses. Do you think it would be worthwhile adding
support for that, too?

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