Re: [PATCH net-next 3/3] net: fec: reset phy on resume after power-up

On Wed, Dec 15, 2021 at 08:34:00PM +0100, Andrew Lunn wrote:

quoted

The reason is that the power consumption in reset is higher in reset
compared to the normal PHY software power down.

Does the datasheet have numbers for in lower power mode and held in
reset? We only have an issue if held in reset when in low power mode
consumes more power than simply in low power mode.

The numbers for KSZ9131, Table 6-3: Power Consumption from datasheet [0]

61.2mW in reset, 24.4mW in software power down (3.3VDD)
40.9mW in reset, 12.5mW in software power down (2.5VDD)

Francesco

[0] https://ww1.microchip.com/downloads/en/DeviceDoc/00002841B.pdf