hi3519v101: kernel version independence analysis

[widgetii]

Overview

hi3519v101 (V3A, Cortex-A17+A7) is the second OSAL-based platform after CV500. Blobs call osal_* wrappers which are source-compiled with kernel_compat.h shims. Only 3 blobs bypass OSAL for 2 kernel APIs.

PR #55 adds hi3516av200 (same SOC_FAMILY) to the README.

API Profile — Nearly as clean as CV500

Direct kernel calls (bypassing OSAL) — only 3 blobs

API	Blobs	Removed in	Shim complexity
register_sysctl_table()	base, sys (2)	6.6	Moderate
init_timer_key()	pciv_fmw (1)	4.15	Moderate — callback signature changed

Via OSAL (handled by recompiling OSAL source)

osal wrapper	Underlying API	Removed in	Handled by
osal_ioremap_nocache()	ioremap_nocache()	5.6	kernel_compat.h
osal_create_proc_entry()	proc_create()	3.10 (old API)	OSAL version check
osal_access_ok()	access_ok()	5.0 (signature)	kernel_compat.h
osal_rtc_time_to_tm()	rtc_time_to_tm()	5.6	kernel_compat.h
osal_rtc_tm_to_time()	rtc_tm_to_time()	5.6	kernel_compat.h

Kernel bump feasibility

Target	Feasible?	Shims needed
4.9 LTS	Yes	None
4.14 LTS	Yes	None
4.19 LTS	Yes	init_timer_key (1 blob: pciv_fmw)
5.4 LTS	Yes	Same — OSAL handles the rest
5.10 LTS	Yes	Same
6.1 LTS	Yes	Same
6.6 LTS	Likely	Above + register_sysctl_table (2 blobs)

hi3519v101 has the second-best kernel bump path after CV500.

Comparison with other platforms

Platform	OSAL?	Direct dangerous APIs	Blobs affected	Bump ceiling
CV500	Yes	0 (strlcpy in 1 blob)	1	Any
hi3519v101	Yes	2 (sysctl_table, init_timer)	3	6.6+
AV100	No	4	13	6.6+
CV200	No	4	~10	5.x–6.x
CV100	No	18	30	3.9

References

• Issue Kernel version independence: umbrella tracker for all legacy platforms #51 — umbrella tracker
• Issue hi3516av100: OSAL shim layer for kernel version independence #50 — AV100 analysis (same shim approach for non-OSAL platforms)
• PR docs: add hi3516av200 to V3A supported hardware table #55 — adds hi3516av200 to README