diff mbox series

[v4,2/6] arm64: dts: ti: k3-j784s4: Add alias to MCU CPSW2G

Message ID 20240131101441.1362409-3-c-vankar@ti.com
State New
Headers
Series Add CPSW2G and CPSW9G nodes for J784S4 |

Commit Message

Chintan Vankar Jan. 31, 2024, 10:14 a.m. UTC 
  Add alias for the MCU CPSW2G port to enable Linux to fetch MAC Address
for the port directly from U-Boot.
---
 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 1 +
 1 file changed, 1 insertion(+)

Comments

Andrew Davis Jan. 31, 2024, 3:36 p.m. UTC | #1 
On 1/31/24 4:14 AM, Chintan Vankar wrote:
> Add alias for the MCU CPSW2G port to enable Linux to fetch MAC Address
> for the port directly from U-Boot.

Could you explain *how* this alias allows Linux to fetch a MAC
address from U-Boot? Sounds like we are doing something hacky here..

Why can't Linux fetch the MAC from efuses the same way U-Boot does,
what happens if I don't use U-Boot to boot?

Andrew

> ---
>   arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> index f34b92acc56d..b74f7d3025de 100644
> --- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> @@ -27,6 +27,7 @@ aliases {
>   		mmc1 = &main_sdhci1;
>   		i2c0 = &wkup_i2c0;
>   		i2c3 = &main_i2c0;
> +		ethernet0 = &mcu_cpsw_port1;
>   	};
>   
>   	memory@80000000 {
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
index f34b92acc56d..b74f7d3025de 100644
--- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
@@ -27,6 +27,7 @@  aliases {
 		mmc1 = &main_sdhci1;
 		i2c0 = &wkup_i2c0;
 		i2c3 = &main_i2c0;
+		ethernet0 = &mcu_cpsw_port1;
 	};
 
 	memory@80000000 {