TDA4VH-Q1: mcu_cpsw C45 phy support in uboot

josh dong

Part Number: TDA4VH-Q1

Tool/software:

Hello TI experts, I am currently using the Marvell 88Q2112 connected to the MCU_CPSW port. How can I access a Clause 45 (C45) type PHY in U-Boot?" My SDK version is

PROCESSOR-SDK-LINUX-J784S4 11.0.

2 months ago

0 Tanmay Patil 2 months ago

TI__Mastermind 38880 points

Hi,

You should be able to do it using mii tool from u-boot. Are you facing any issues with that.

Regards,

Tanmay

0 josh dong 2 months ago

Prodigy 50 points

Hi Tanmay,

Thank you for your suggestion. I have attempted to use the mii tool in U-Boot to access Clause 45 (C45) PHY registers，but it returned all 0. However, after reviewing the source code of the CPSW MDIO driver (drivers/net/phy/cpsw_mdio.c), I observed that the current implementation lacks native support for the C45 protocol.

0 Tanmay Patil 2 months ago in reply to josh dong

TI__Mastermind 38880 points

Hi,

Correct, but it should be possible to indirect access of c45 regs using c22. Are you facing problems for this as well.

Regards,
Tanmay

0 josh dong 2 months ago in reply to Tanmay Patil

Prodigy 50 points

HI,I modified the CPSW_MDIO read and write functions in U-Boot to simultaneously support both Clause 45 and Clause 22 protocols, and now the driver for the 88Q2112 can be loaded successfully. Thanks!

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TDA4VH-Q1: mcu_cpsw C45 phy support in uboot

PROCESSOR-SDK-LINUX-J784S4 11.0.