Re: [PATCH 08/14] pinctrl: renesas: rzg2l: Add output enable support

[Geert Uytterhoeven]

Hi Claudiu,

Thanks for your patch!

On Mon, Nov 20, 2023 at 8:01 AM Claudiu <claudiu.beznea@xxxxxxxxx> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
>
> Some of the Ethernet pins on RZ/G3S (but also valid for RZ/G2L) need to
> have direction of the IO buffer set as output for Ethernet to work
> properly. On RZ/G3S these pins are P1_0/P7_0, P1_1/P7_1 with could have
> the following Ethernet functions: TXC/TX_CLK or TX_CTL/TX_EN. To be able
> to configure this the output enable has been implemented. This is
> implemented with 2 per-platform read/write functions to be able to simply
> validate the pins supporting this on a platform basis. Moreover, on RZ/G2L
> the register though which these settings could be done is 8 bits long
> whereas on RZ/G3S this is a 32 bit register. The Ethernet pins supporting
> OEN are different. These differences could be handled in platform specific
> OEN read/write functions.

These registers are documented to support access sizes of 8/16/32 bits
on RZ/G3S.  Hence you don't need to differentiate, but can just use
8-bit accesses on all platforms.

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