AM5728: How to enable GMAC_SW module clock

Hi Biser,

You quick response is always appreciated. I had already downloaded CLOCKTREETOOL-SITARA for AM5728 ethernet clock mapping. But i was confused about quite a few things.

1) The data sheet says we have GMAC_SW Ethernet Controller, but in clock tree for AM5728 we have GMAC under (CD_GMAC) clock.

2) If GMAC block is similar to GMAC_SW, what frequency we need to set in order have RGMII mode. As there are so many clock buses for GMAC block..

3) There are 5 clock buses coming through GMAC{RMII_50MHz_CLK, GMAC_MAIN_CLK, RGMII_5MHZ_CLK, GMAC_RFT_CLK, GMAC_250MHZ_CLK}} but all of the buses are open at some point like "H_/_". 

Thanks,

Hamza.

Hi Biser,

Thank you again for looking into it. By looking into datasheet, CCM module has CM_GMAC_GMAC_CLKCTRL, is this register reponsible to enable the GMAC_SW module ? Would this register enable GMAC_MAIN_CLOCK ?

Thanks,
Hamza.

Hi Biser,

Thank you for guiding me to the write place. Still one little confusion, In third point "Enable the GMAC_SW Ethernet Subsystem Clocks", what are exactly subsystem clocks and shouldn't they enabled by default after enabling Ethernet module? Also in Register CM_GMAC_CLKSTCTRL there are bits of CLKTRCTRL, I think i should configure it to HW_AUTO for normal operation, just want a confirmation though.

Thanks,
Hamza

Hi Biser,

Thank you for your support. I will look into SDK.

Thanks,
Hamza.