BFE EngineeringandClaude Opus 4.8
54f961c6b6
Whole-driver port (mainline has no rockchip pvtm): copied vendor rockchip_pvtm.c
+ pvtm.h. 6.18 deltas: thermal_zone opaque -> thermal_zone_get_temp; of_device.h.
Real blocker: vendor of_match_table wrapped rv1106 entries in #ifdef
CONFIG_CPU_RV1106 (nonexistent in mainline) -> devices+driver present but never
bound, probe silent. Dropped the guard -> both bind.
Verified: ff240000.pvtm + ff390000.pvtm probed; /sys/kernel/debug/pvtm/{core,pmu}/
value read ring-osc counts (71682 90462 / 35772). pvtm/PORT-DONE.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017wB8KB3MMQztRDXCMCkPrf
1.5 KiB
PVTM (Process-Voltage-Temperature Monitor) — ✅ VERIFIED on warden-c8a3 (2026-08-25)
Whole-driver port: mainline 6.18 has no rockchip pvtm driver; the vendor
drivers/soc/rockchip/rockchip_pvtm.c (GPL-2.0, 1046L) supports rv1106. Copied it in
include/linux/soc/rockchip/pvtm.h; KconfigROCKCHIP_PVTM+ Makefile;=y.
API-delta fixes (6.18)
struct thermal_zone_deviceis now opaque → replacedpvtm->tz->ops->get_temp(...)with the publicthermal_zone_get_temp(pvtm->tz, &cur_temp).- added
#include <linux/of_device.h>forof_match_device(). - copied the vendor-only header
linux/soc/rockchip/pvtm.h.
The real blocker (why it first probed silently)
The vendor of_match_table wraps the rv1106 entries in #ifdef CONFIG_CPU_RV1106 — a
vendor per-SoC symbol that does not exist in mainline. Result: devices
(ff240000.pvtm, ff390000.pvtm) were created + the driver registered, but the
compatibles were compiled out of the match table, so nothing bound and probe never
ran (no dmesg at all). Fix: drop the #ifdef CONFIG_CPU_RV1106 guard — our tree
only builds for rv1106, so the entries are unconditional. (Watch for this guard in any
other vendor driver ported by verbatim copy.)
Evidence
rockchip-pvtm ff240000.pvtm: pvtm@0 probed + ff390000.pvtm: pvtm@0 probed;
/sys/kernel/debug/pvtm/core/value = pvtm: 71682 90462,
/sys/kernel/debug/pvtm/pmu/value = pvtm: 35772 (ring-oscillator counts, the PVT
signal). Exports rockchip_get_pvtm_value() for future DVFS voltage margining.