Extend the DPLL subsystem with a new DPLL type, DPLL_TYPE_TXC, representing devices that drive a transmit reference clock. Certain PHYs, MACs and SerDes blocks use a dedicated TX reference clock for link operation, and this clock domain is distinct from PPS- and EEC-driven synchronization sources. Defining a dedicated type allows user space and drivers to correctly classify and configure DPLLs intended for TX clock generation.
The corresponding netlink specification is updated to expose "txc" Reviewed-by: Arkadiusz Kubalewski <[email protected]> Reviewed-by: Aleksandr Loktionov <[email protected]> Signed-off-by: Grzegorz Nitka <[email protected]> --- Documentation/netlink/specs/dpll.yaml | 3 +++ include/uapi/linux/dpll.h | 2 ++ 2 files changed, 5 insertions(+) diff --git a/Documentation/netlink/specs/dpll.yaml b/Documentation/netlink/specs/dpll.yaml index 3dd48a32f783..2a2ee37a1fc0 100644 --- a/Documentation/netlink/specs/dpll.yaml +++ b/Documentation/netlink/specs/dpll.yaml @@ -138,6 +138,9 @@ definitions: - name: eec doc: dpll drives the Ethernet Equipment Clock + - + name: txc + doc: dpll drives Tx reference clock render-max: true - type: enum diff --git a/include/uapi/linux/dpll.h b/include/uapi/linux/dpll.h index de0005f28e5c..a277d08ac264 100644 --- a/include/uapi/linux/dpll.h +++ b/include/uapi/linux/dpll.h @@ -109,10 +109,12 @@ enum dpll_clock_quality_level { * enum dpll_type - type of dpll, valid values for DPLL_A_TYPE attribute * @DPLL_TYPE_PPS: dpll produces Pulse-Per-Second signal * @DPLL_TYPE_EEC: dpll drives the Ethernet Equipment Clock + * @DPLL_TYPE_TXC: dpll drives Tx reference clock signal */ enum dpll_type { DPLL_TYPE_PPS = 1, DPLL_TYPE_EEC, + DPLL_TYPE_TXC, /* private: */ __DPLL_TYPE_MAX, -- 2.39.3
