On 6/10/19 2:27 PM, Andrew Lunn wrote: >> Maybe the broader question is how do you, Heiner and Russell imagine a >> genuine case where the PHY does not have a firmware provided/loaded >> before Linux does take over (say, BoM cost savings dictate no flash can >> be used > > I've not seen either of these PHY devices not have a FLASH. I also > wonder how long such a download to RAM takes. I suspect it is > slow. The boards i have, have a 4Mbit Flash, so, 256K 16bit words. > How long does 256K MDIO transfers take, given that they are typically > polled IO? Is that a reasonable design/cost trade off?
If you have a long enough uptime, sure. You could emulate the SPI flash through the means of GPIO pins, it's embedded, so sky's (no pun intended) is the limit :). -- Florian
