Commit Graph
2 Commits
Author SHA1 Message Date
Yangyu ChenandAnup Patel 019a8e69a1 platform: generic: thead: add Canaan Kendryte K230
Canaan Kendryte K230 SoC has T-Head C908 cores inside. The dt-binding has
been merged into the linux kernel [1]. However, it has early version of
C908 core which does not have Sscofpmf and need to use T-Head PMU
extension. Thus, we add a K230 compatible string to thead_generic_match
and set quirk for T-Head PMU.

[1] https://lore.kernel.org/linux-riscv/tencent_4D85743622F39109466913393EE2F6C5980A@qq.com/

Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Reviewed-by: Inochi Amaoto <inochiama@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-05-09 18:10:25 +05:30
Yangyu ChenandAnup Patel 33e21c9476 platform: generic: thead: separate T-Head PMU Errata
As Guo Ren said from the kernel mailing list [1], future T-Head CPUs,
including the newer versions of T-Head C908, will feature standard
Sscofpmf extension. For these CPUs, T-Head's implementation of PMU
Overflow Interrupts may not needed anymore. In this case, we shouldn't
apply T-Head PMU for all T-Head CPUs. Thus, this patch separated T-Head PMU
errata.

[1] https://lore.kernel.org/linux-riscv/Zh9sUUUT09LZb0MO@gmail.com/

Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Reviewed-by: Inochi Amaoto <inochiama@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-05-09 18:09:05 +05:30