1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 057ffef37b42..aeddfc46c831 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -196,6 +196,53 @@ static struct cpuidle_state snb_cstates[] = {
                 .enter = NULL }
 };
 
+static struct cpuidle_state byt_cstates[] = {
+        {
+                .name = "C1-BYT",
+                .desc = "MWAIT 0x00",
+                .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+                .exit_latency = 1,
+                .target_residency = 1,
+                .enter = &intel_idle },
+        {
+                .name = "C1E-BYT",
+                .desc = "MWAIT 0x01",
+                .flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_TIME_VALID,
+                .exit_latency = 15,
+                .target_residency = 30,
+                .enter = &intel_idle },
+        {
+                .name = "C6N-BYT",
+                .desc = "MWAIT 0x58",
+                .flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+                .exit_latency = 40,
+                .target_residency = 275,
+                .enter = &intel_idle },
+        {
+                .name = "C6S-BYT",
+                .desc = "MWAIT 0x52",
+                .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+                .exit_latency = 140,
+                .target_residency = 560,
+                .enter = &intel_idle },
+        {
+                .name = "C7-BYT",
+                .desc = "MWAIT 0x60",
+                .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+                .exit_latency = 1200,
+                .target_residency = 1500,
+                .enter = &intel_idle },
+        {
+                .name = "C7S-BYT",
+                .desc = "MWAIT 0x64",
+                .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+                .exit_latency = 10000,
+                .target_residency = 20000,
+                .enter = &intel_idle },
+        {
+                .enter = NULL }
+};
+
 static struct cpuidle_state ivb_cstates[] = {
         {
                 .name = "C1-IVB",
@@ -464,6 +511,11 @@ static const struct idle_cpu idle_cpu_snb = {
         .disable_promotion_to_c1e = true,
 };
 
+static const struct idle_cpu idle_cpu_byt = {
+        .state_table = byt_cstates,
+        .disable_promotion_to_c1e = true,
+};
+
 static const struct idle_cpu idle_cpu_ivb = {
         .state_table = ivb_cstates,
         .disable_promotion_to_c1e = true,
@@ -494,6 +546,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
         ICPU(0x2f, idle_cpu_nehalem),
         ICPU(0x2a, idle_cpu_snb),
         ICPU(0x2d, idle_cpu_snb),
+        ICPU(0x37, idle_cpu_byt),
         ICPU(0x3a, idle_cpu_ivb),
         ICPU(0x3e, idle_cpu_ivb),
         ICPU(0x3c, idle_cpu_hsw),