netdev - Re: [PATCH iproute2-next] dpll: Add dpll command

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Message-ID: <74b77b89-4359-4955-8560-f4284fbb03f1@redhat.com>
Date: Thu, 6 Nov 2025 08:19:41 +0100
From: Ivan Vecera <ivecera@...hat.com>
To: Petr Oros <poros@...hat.com>, netdev@...r.kernel.org
Cc: dsahern@...nel.org, stephen@...workplumber.org, jiri@...nulli.us
Subject: Re: [PATCH iproute2-next] dpll: Add dpll command

On 11/5/25 8:09 PM, Petr Oros wrote:
> Add a new userspace tool for managing and monitoring DPLL devices via the
> Linux kernel DPLL subsystem. The tool uses libmnl for netlink communication
> and provides a complete interface for device and pin configuration.
> 
> The tool supports:
> 
> - Device management: enumerate devices, query capabilities (lock status,
>    temperature, supported modes, clock quality levels), configure phase-offset
>    monitoring and averaging
> 
> - Pin management: enumerate pins with hierarchical relationships, configure
>    frequencies (including esync), phase adjustments, priorities, states, and
>    directions
> 
> - Complex topologies: handle parent-device and parent-pin relationships,
>    reference synchronization tracking, multi-attribute queries (frequency
>    ranges, capabilities)
> 
> - ID resolution: query device/pin IDs by various attributes (module-name,
>    clock-id, board-label, type)
> 
> - Monitoring: real-time display of device and pin state changes via netlink
>    multicast notifications
> 
> - Output formats: both human-readable and JSON output (with pretty-print
>    support)
> 
> The tool belongs in iproute2 as DPLL devices are tightly integrated with
> network interfaces - modern NICs provide hardware clock synchronization
> support. The DPLL subsystem uses the same netlink infrastructure as other
> networking subsystems, and the tool follows established iproute2 patterns
> for command structure, output formatting, and error handling.
> 
> Example usage:
> 
>    # dpll device show
>    # dpll device id-get module-name ice
>    # dpll device set id 0 phase-offset-monitor enable
>    # dpll pin show
>    # dpll pin set id 0 frequency 10000000
>    # dpll pin set id 13 parent-device 0 state connected prio 10
>    # dpll pin set id 0 reference-sync 1 state connected
>    # dpll monitor
>    # dpll -j -p device show
> 
> Co-developed-by: Ivan Vecera <ivecera@...hat.com>
> Signed-off-by: Petr Oros <poros@...hat.com>
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> ---

Petr, could you please add corresponding entry to MAINTAINERS file?

Thanks,
Ivan