Messages in this thread | | | Date | Sat, 26 Aug 2023 13:49:10 +0300 | From | Vladimir Oltean <> | Subject | Re: [PATCH 2/2] net: dsa: microchip: Provide Module 4 KSZ9477 errata (DS80000754C) |
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On Fri, Aug 25, 2023 at 06:48:41PM +0000, Tristram.Ha@microchip.com wrote: > > > IMHO adding functions to MMD modification would facilitate further > > > development (for example LED setup). > > > > We already have some KSZ9477 specific initialization done in the Micrel > > PHY driver under drivers/net/phy/micrel.c, can we converge on the PHY > > driver which has a reasonable amount of infrastructure for dealing with > > workarounds, indirect or direct MMD accesses etc.? > > Actually the internal PHY used in the KSZ9897/KSZ9477/KSZ9893 switches > are special and only used inside those switches. Putting all the switch > related code in Micrel PHY driver does not really help. When the switch > is reset all those PHY registers need to be set again, but the PHY driver > only executes those code during PHY initialization. I do not know if > there is a good way to tell the PHY to re-initialize again.
Suppose there was a method to tell the PHY driver to re-initialize itself. What would be the key points in which the DSA switch driver would need to trigger that method? Where is the switch reset at runtime?
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