Hi Niklas,
On Mon, Jan 22, 2024 at 5:06 PM Niklas Söderlund
<niklas.soderlund+renesas@xxxxxxxxxxxx> wrote:
> On the white-hawk development board the Ethernet TSN IP can be connected
> to one of two different external PHYs. One PHY is located on the
> breakout board, and the other on the Ethernet sub-board. Which PHY is
> connected depends on what resistors are mounted on the board.
Actually there are three options:
1. Breakout board,
2. Ethernet sub-board,
3. Ether module board.
> The default white-hawk configuration connect the TSN with the PHY on the
> breakout board. Unfortunately the standard breakout board do not
> populate the external PHY.
According to the schematics, this seems to depend on board revision:
- rev. 0.909: TSN is wired to 3,
- rev. 1.00: TSN is wired to 2.
> Add an overlay that can be applied to enable Ethernet TSN support for
> those boards that do populate the breakout board, or mount the
> appropriate resistors to connect TSN with the Ethernet sub-board.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Thanks for your patch!
> --- a/arch/arm64/boot/dts/renesas/Makefile
> +++ b/arch/arm64/boot/dts/renesas/Makefile
> @@ -84,7 +84,9 @@ dtb-$(CONFIG_ARCH_R8A779F0) += r8a779f4-s4sk.dtb
> dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk.dtb
> dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-ard-audio-da7212.dtbo
> r8a779g0-white-hawk-ard-audio-da7212-dtbs := r8a779g0-white-hawk.dtb r8a779g0-white-hawk-ard-audio-da7212.dtbo
Please add
dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-tsn.dtbo
so that the .dtbo is considered for installation, too.
> +r8a779g0-white-hawk-tsn-dtbs := r8a779g0-white-hawk.dtb r8a779g0-white-hawk-tsn.dtbo
> dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-ard-audio-da7212.dtb
> +dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g0-white-hawk-tsn.dtb
The rest LGTM.
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
