Re: [U-Boot] Disabling Autonegotiation
Dear priyanka sharma,
please keep the mailinmg list on Cc:
In message CAKynAoccK9AwcQrt-ggWRYj5RiTLtnf00+fU71=YMog+8eJZwA@mail.gmail.com you wrote:
Disabling auto negotiation along with limiting ethernet PHY to 100MBit is a part of requirements for a custom solution.
This does not actually answer my question. What I'm interested to understand is _why_ you want to do that. As mentioned before, autonegotiation is usually a good thing to have, and mandatory in many cases. If you disable it, you probably want to work around some problem (eventually caused by broken or mis-designed hardware), and depending on the nature of the problem there might be better ways to solve it.
Best regards,
Wolfgang Denk
Hi all
2015-06-09 15:04 GMT+02:00 Wolfgang Denk wd@denx.de:
Dear priyanka sharma,
please keep the mailinmg list on Cc:
In message CAKynAoccK9AwcQrt-ggWRYj5RiTLtnf00+fU71=YMog+8eJZwA@mail.gmail.com you wrote:
Disabling auto negotiation along with limiting ethernet PHY to 100MBit is a part of requirements for a custom solution.
This does not actually answer my question. What I'm interested to understand is _why_ you want to do that. As mentioned before, autonegotiation is usually a good thing to have, and mandatory in many cases. If you disable it, you probably want to work around some problem (eventually caused by broken or mis-designed hardware), and depending on the nature of the problem there might be better ways to solve it.
I have the same cosmetic issue (and can live with it). The cause to disable autoneg for my case is quite simple. On a custom imx6 based board the fec is directly connected via MII to an Ethernet switch (KSZ8895). In that case the link to the switch is always up and autoneg does not work. Under linux I am using the fixed phy device tree binding.
greets -- Christian Gmeiner, MSc
Hi all
2015-06-09 21:50 GMT+02:00 Christian Gmeiner christian.gmeiner@gmail.com:
Hi all
2015-06-09 15:04 GMT+02:00 Wolfgang Denk wd@denx.de:
Dear priyanka sharma,
please keep the mailinmg list on Cc:
In message CAKynAoccK9AwcQrt-ggWRYj5RiTLtnf00+fU71=YMog+8eJZwA@mail.gmail.com you wrote:
Disabling auto negotiation along with limiting ethernet PHY to 100MBit is a part of requirements for a custom solution.
This does not actually answer my question. What I'm interested to understand is _why_ you want to do that. As mentioned before, autonegotiation is usually a good thing to have, and mandatory in many cases. If you disable it, you probably want to work around some problem (eventually caused by broken or mis-designed hardware), and depending on the nature of the problem there might be better ways to solve it.
I have the same cosmetic issue (and can live with it). The cause to disable autoneg for my case is quite simple. On a custom imx6 based board the fec is directly connected via MII to an Ethernet switch (KSZ8895). In that case the link to the switch is always up and autoneg does not work. Under linux I am using the fixed phy device tree binding.
drivers/net/phy/micrel.c has support for the KSZ8895 - will give it a try :)
greets -- Christian Gmeiner, MSc
participants (2)
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Christian Gmeiner -
Wolfgang Denk