Re: [PATCH 11/11] arm64: dts: rp1: Add support for MACB contained in RP1

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On 8/20/24 07:36, Andrea della Porta wrote:
RaspberryPi RP1 is multi function PCI endpoint device that
exposes several subperipherals via PCI BAR.
Add an ethernet node for Cadence MACB to the RP1 dtso

Signed-off-by: Andrea della Porta <andrea.porta@xxxxxxxx>
---
  arch/arm64/boot/dts/broadcom/rp1.dtso | 23 +++++++++++++++++++++++
  1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/rp1.dtso b/arch/arm64/boot/dts/broadcom/rp1.dtso
index d80178a278ee..b40e203c28d5 100644
--- a/arch/arm64/boot/dts/broadcom/rp1.dtso
+++ b/arch/arm64/boot/dts/broadcom/rp1.dtso
@@ -78,6 +78,29 @@ rp1_clocks: clocks@c040018000 {
  							       <50000000>;   // RP1_CLK_ETH_TSU
  				};
+ rp1_eth: ethernet@c040100000 {
+					reg = <0xc0 0x40100000  0x0 0x4000>;
+					compatible = "cdns,macb";
+					#address-cells = <1>;
+					#size-cells = <0>;
+					interrupts = <RP1_INT_ETH IRQ_TYPE_LEVEL_HIGH>;
+					clocks = <&macb_pclk &macb_hclk &rp1_clocks RP1_CLK_ETH_TSU>;
+					clock-names = "pclk", "hclk", "tsu_clk";
+					phy-mode = "rgmii-id";
+					cdns,aw2w-max-pipe = /bits/ 8 <8>;
+					cdns,ar2r-max-pipe = /bits/ 8 <8>;
+					cdns,use-aw2b-fill;
+					local-mac-address = [00 00 00 00 00 00];
+					phy-handle = <&phy1>;
+					phy-reset-gpios = <&rp1_gpio 32 GPIO_ACTIVE_LOW>;
+					phy-reset-duration = <5>;
+
+					phy1: ethernet-phy@1 {
+						reg = <0x1>;
+						brcm,powerdown-enable;

Undocumented property, and I would like to understand why this needs to be specified in the Device Tree? What model of Broadcom Ethernet PHY is being used here?
--
Florian





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