| Message ID | 20250118111344.361617-5-marek.vasut+renesas@mailbox.org (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
| Series | [1/5] arm64: dts: renesas: r8a779f0: Add labels for rswitch ports | expand |
diff --git a/arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts b/arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts index 4bf526535ee05..86a1945127529 100644 --- a/arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts +++ b/arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts @@ -22,7 +22,8 @@ aliases { i2c5 = &i2c5; serial0 = &hscif0; serial1 = &hscif1; - ethernet0 = &rswitch; + ethernet0 = &rswitchport0; + ethernet1 = &rswitchport1; }; chosen {
Each rswitch port TSNn has a dedicated MAC address assigned to it, so does AVB MAC. The MAC addresses for each rswitch port and AVB, four in total, are stored in the FPGA populated on the board and can be read out via I2C from bus i2c@e66e0000 address 0x70 offsets 0x58 for AVB and 0x60, 0x68, 0x70 for TSNn . There is no single MAC address assigned to the rswitch itself, there are three of them, one for each rswitch port. Instead of ethernet0 alias for rswitch itself, describe alias ethernet0, ethernet1 for each enabled rswitch port. This allows U-Boot to insert MAC addresses from its environment variables ethaddr/eth1addr/eth2addr into each rswitch port nodes, so Linux can read and use one unique MAC address for each rswitch port. Note that it is unlikely this would break existing rswitch driver operation in the Linux kernel, because as of right now, the rswitch driver already calls of_get_ethdev_address() for each port to read out the MAC address out of each rswitch port DT node, and if that is missing, it falls back to MAC address settings read from the hardware itself, and if that also fails, it uses random MAC address. Fixes: 412f2224b3b6 ("arm64: dts: renesas: s4sk: Fix ethernet0 alias") Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org> --- Cc: Conor Dooley <conor+dt@kernel.org> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org --- arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)