HP PA-RISC Platform Bus and I/O ASIC Support (GSC, LASI, Dino, Elroy, CCIO)
Platform plumbing for Hewlett-Packard's PA-RISC workstations and servers, including the HP 9000 line. It drives the proprietary system buses and I/O bridge chips (GSC, LASI, WAX, Dino, Elroy, CCIO, SBA) that connect CPUs to PCI, storage, and peripherals on machines HP shipped through the 1990s and 2000s, with last new-system sales in 2008-2009.
recommendation
Worth keeping but flagging as legacy hardware. HP stopped selling PA-RISC systems in 2008-2009 and Debian dropped the port from stable after squeeze, so real-world deployments are now thin. However, the subsystem is clearly not abandoned: maintainer Helge Deller is still landing cleanups in 2025 and bug fixes with stable tags were posted as recently as 2026, and PA-RISC also lives on as a QEMU emulation target. Removal would be premature, but documenting it as a niche legacy platform is appropriate.
repository signals
sources
- lore.kernel.org
Recent upstream maintenance exists in 2026: a bug fix for drivers/parisc/led.c was posted with a Fixes tag and Cc: stable.
- lore.kernel.org
The subtree still gets maintainer-authored cleanups in 2025, indicating it is not abandoned.
- parisc.docs.kernel.org
PA-RISC remains relevant in emulation: current documentation describes QEMU support for four PA-RISC machine types and Linux guests.
- debian.org
Debian still documents PA-RISC as a port, but notes it was dropped from stable after squeeze, consistent with niche rather than mainstream deployment.
- en.wikipedia.org
HP 9000 PA-RISC systems ended new sales in 2008 with last ship dates in 2009, so the physical hardware family is long out of new-production circulation.
codex reasoning notes (technical)
Local `rg`/`sed` inspection of Kconfig/Makefile shows this directory is PA-RISC platform support driver code for HP bus/I/O ASICs, not a generic helper library. The two lore URLs were obtained via `lore_file_timeline` and `lore_activity` on `drivers/parisc/led.c`, showing real 2025-2026 bug-fix traffic rather than pure treewide churn. The QEMU, Debian, and HP 9000 URLs were obtained via web `search_query` plus `open/find`; together they indicate surviving use is mostly legacy physical HP systems plus emulator/ports niches. `lore_regex` timed out and `lei` was sandbox-blocked, so I found no positive evidence of an active upstream removal series; given recent maintenance, removal/deprecation would be premature, but annotating it as legacy hardware is justified.