intel_idle: add Clearwater Forest SoC support

Clearwater Forest (CWF) SoC has the same C-states as Sierra Forest (SRF)
SoC.  Add CWF support by re-using the SRF C-states table.

Note: it is expected that CWF C-states will have same or very similar
characteristics as SRF C-states (latency and target residency).

However, there is a possibility that the characteristics will end up
being different enough when the CWF platform development is finished.
In that case, a separate CWF C-states table will be created and populated
with the CWF-specific characteristics (latency and target residency).

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Link: https://patch.msgid.link/20241203130306.1559024-1-artem.bityutskiy@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index ac4d8faa3886c85a4ef119f20048b1c20537c6ae..23d0cd27a58128efd301d7b781213e3edadaf0b2 100644 (file)
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -1651,6 +1651,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
        X86_MATCH_VFM(INTEL_ATOM_TREMONT_D,     &idle_cpu_snr),
        X86_MATCH_VFM(INTEL_ATOM_CRESTMONT,     &idle_cpu_grr),
        X86_MATCH_VFM(INTEL_ATOM_CRESTMONT_X,   &idle_cpu_srf),
+       X86_MATCH_VFM(INTEL_ATOM_DARKMONT_X,    &idle_cpu_srf),
        {}
 };