Add the "cpsw-mac-efuse" node within "wkup_conf" node corresponding to the CTRLMMR_MAC_IDx registers within the CTRL_MMR space. Assign the compatible "ti,am62p-cpsw-mac-efuse" to enable "syscon_regmap" operations on these registers. The MAC Address programmed in the eFuse is accessible through the CTRLMMR_MAC_IDx registers. The "ti,syscon-efuse" device-tree property points to the CTRLMMR_MAC_IDx registers, allowing the CPSW driver to fetch the MAC Address and assign it to the network interface associated with CPSW3G MAC Port 1. Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx> --- This patch is based on linux-next tagged next-20240404. Patch depends on: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240402105708.4114146-1-s-vadapalli@xxxxxx/ for the newly added "ti,am62p-cpsw-mac-efuse" compatible. v1: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240402094200.4036076-1-s-vadapalli@xxxxxx/ Changes since v1: - Since "wkup_conf" is modelled as a "simple-bus" rather than being modelled as a System Controller node with the "syscon" compatible, directly passing the reference to the "wkup_conf" node using the "ti,syscon-efuse" device-tree property will not work. Therefore, I posted the patch at: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240402105708.4114146-1-s-vadapalli@xxxxxx/ in order to add a new compatible to be used for modelling the CTRLMMR_MAC_IDx registers as System Controller nodes, thereby allowing the existing "ti,syscon-efuse" property to be used. Now, "ti,syscon-efuse" points to the "cpsw_mac_efuse" node within "wkup_conf" node, with "cpsw_mac_efuse" being a "syscon" node. Logs verifying that the CPSW driver assigns the MAC Address from the eFuse based on the CTRLMMR_MAC_IDx registers at 0x43000200 and 0x43000204 to the interface eth0 corresponding to CPSW3G MAC Port 1: https://gist.github.com/Siddharth-Vadapalli-at-TI/9982c6f13bf9b8cfaf97e8517e7dea13 Regards, Siddharth. arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 1 + arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi index 7337a9e13535..848ca454a411 100644 --- a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi @@ -696,6 +696,7 @@ cpsw_port1: port@1 { label = "port1"; phys = <&phy_gmii_sel 1>; mac-address = [00 00 00 00 00 00]; + ti,syscon-efuse = <&cpsw_mac_efuse 0x0>; }; cpsw_port2: port@2 { diff --git a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi index a84756c336d0..df9d40f64e3b 100644 --- a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi @@ -18,6 +18,11 @@ chipid: chipid@14 { reg = <0x14 0x4>; bootph-all; }; + + cpsw_mac_efuse: cpsw-mac-efuse@200 { + compatible = "ti,am62p-cpsw-mac-efuse", "syscon"; + reg = <0x200 0x8>; + }; }; wkup_uart0: serial@2b300000 { -- 2.40.1
