default or selected kernelversion does not have config value CONFIG_AS21XXX_PHY.
Result is shown for kernelversion 6.16-rc6
Aeonsemi AS21xxx PHYs
modulename: as21xxx.ko
configname: CONFIG_AS21XXX_PHY
Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>PHY Device support and infrastructure
└─>Aeonsemi AS21xxx PHYs
In linux kernel since version 6.1.145 (release Date: 2025-07-14)
Currently supports the Aeonsemi AS21xxx PHY.
These are C45 PHYs 10G that require all a generic firmware.
Supported PHYs AS21011JB1, AS21011PB1, AS21010JB1, AS21010PB1,
AS21511JB1, AS21511PB1, AS21510JB1, AS21510PB1, AS21210JB1,
AS21210PB1 that all register with the PHY ID 0x7500 0x7500
before the firmware is loaded.
These are C45 PHYs 10G that require all a generic firmware.
Supported PHYs AS21011JB1, AS21011PB1, AS21010JB1, AS21010PB1,
AS21511JB1, AS21511PB1, AS21510JB1, AS21510PB1, AS21210JB1,
AS21210PB1 that all register with the PHY ID 0x7500 0x7500
before the firmware is loaded.