Re: [RFC] Defining a home/maintenance model for non-NIC PHC devices using the /dev/ptpX API
From: Richard Cochran <richardcochran@gmail.com>
Date: 2026-01-13 04:21:34
Also in:
linux-clk, lkml, virtualization
On Fri, Jan 09, 2026 at 10:56:56AM +0800, Wen Gu wrote:
Introducing a new clock type or a new userspace API (e.g. /dev/XXX) would require widespread userspace changes, duplicated tooling, and long-term fragmentation. This RFC is explicitly NOT proposing a new userspace API.
Actually I disagree. The PHC devices appear to user space as clockid_t. The API for these works seamlessly and interchangeably with SYS-V clock IDs. The path that is opened, whether /dev/ptpX or some new /dev/hwclkX etc is a trivial detail that adds no burden to user space. Thanks, Richard