LS1046a EC2_TX_EN and EC2_GTX_CLK GPIO mode config fail

[YellowHuangMetanoia]

Hi experts,

The tareget is to setup EC2_TX_EN and EC2_GTX_CLK_ as GPIO mode but still reserve EC2_TXD as 1588 function concurrently.

Checked LS1046A Reference Manual(LS1046ARM.pdf), it show that RCW[EC2] value as 010 meet this requirement, but the GPIO3[19] and GPIO3[20] function can't work unless force set RCW[EC2] as 001.

Any suggest?

Thanks

[YellowHuangMetanoia]

OK, got it.

Look like that GPIO and TSEC_1588 are mutual excluded in latest reference manual.

[yipingwang · Accepted solution]

It is not possible to setup EC2_TX_EN and EC2_GTX_CLK_ as GPIO mode but still reserve EC2_TXD as 1588 function concurrently.
Please refer to table Table 3-11. EC2 RGMII signal configuration in LS1046ARMAD (Rev. 3.1, 03/2022)