intel_idle: add SnowRidge C-state table

[linux-2.6-microblaze.git] / drivers / idle / intel_idle.c

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index d793355..28f93b9 100644 (file)
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -963,6 +963,39 @@ static struct cpuidle_state dnv_cstates[] __initdata = {
                .enter = NULL }
 };
 
+/*
+ * Note, depending on HW and FW revision, SnowRidge SoC may or may not support
+ * C6, and this is indicated in the CPUID mwait leaf.
+ */
+static struct cpuidle_state snr_cstates[] __initdata = {
+       {
+               .name = "C1",
+               .desc = "MWAIT 0x00",
+               .flags = MWAIT2flg(0x00),
+               .exit_latency = 2,
+               .target_residency = 2,
+               .enter = &intel_idle,
+               .enter_s2idle = intel_idle_s2idle, },
+       {
+               .name = "C1E",
+               .desc = "MWAIT 0x01",
+               .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_ALWAYS_ENABLE,
+               .exit_latency = 15,
+               .target_residency = 25,
+               .enter = &intel_idle,
+               .enter_s2idle = intel_idle_s2idle, },
+       {
+               .name = "C6",
+               .desc = "MWAIT 0x20",
+               .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 130,
+               .target_residency = 500,
+               .enter = &intel_idle,
+               .enter_s2idle = intel_idle_s2idle, },
+       {
+               .enter = NULL }
+};
+
 static const struct idle_cpu idle_cpu_nehalem __initconst = {
        .state_table = nehalem_cstates,
        .auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE,
@@ -1084,6 +1117,12 @@ static const struct idle_cpu idle_cpu_dnv __initconst = {
        .use_acpi = true,
 };
 
+static const struct idle_cpu idle_cpu_snr __initconst = {
+       .state_table = snr_cstates,
+       .disable_promotion_to_c1e = true,
+       .use_acpi = true,
+};
+
 static const struct x86_cpu_id intel_idle_ids[] __initconst = {
        X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EP,          &idle_cpu_nhx),
        X86_MATCH_INTEL_FAM6_MODEL(NEHALEM,             &idle_cpu_nehalem),
@@ -1122,7 +1161,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
        X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT,       &idle_cpu_bxt),
        X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS,  &idle_cpu_bxt),
        X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D,     &idle_cpu_dnv),
-       X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D,      &idle_cpu_dnv),
+       X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D,      &idle_cpu_snr),
        {}
 };