[PATCH 2/2] arm64: dts: renesas: hihope-rzg2-ex: Specify ethernet PHY reset timings

Geert Uytterhoeven geert at linux-m68k.org
Mon Aug 10 07:45:23 PDT 2026


On Tue, 14 Jul 2026 at 15:05, Marek Vasut
<marek.vasut+renesas at mailbox.org> wrote:
> The RTL8211E reference manual [1] page 38 chapter 7.16. PHY Reset
> (Hardware Reset) states that the PHYRSTB pin must be asserted low
> for at least 10ms (Tgap in Figure 10) and the system must wait at
> minimum 30ms (for internal circuits settle time) before accessing
> the PHY registers. Use 15ms and 35ms respectively to provide some
> additional margin.
>
> [1] https://files.pine64.org/doc/datasheet/pine64/rtl8211e%28g%29-vb%28vl%29-cg_datasheet_1.6.pdf
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>

Reviewed-by: Geert Uytterhoeven <geert+renesas at glider.be>
i.e. will queue in renesas-devel for v7.4.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-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



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