[PATCH] intel_idle: add idle values for Cherrytrail/Braswell

[Mika Westerberg]

From: Kumar Mahesh <mahesh.kumar.p@xxxxxxxxx>

Braswell is a successor of Intel Baytrail but has slighly different CPU
idle values and latencies.

Signed-off-by: Kumar Mahesh <mahesh.kumar.p@xxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
 drivers/idle/intel_idle.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 9b7ee7e427df..ae6f9f1cb700 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -536,6 +536,59 @@ static struct cpuidle_state atom_cstates[] = {
 	{
 		.enter = NULL }
 };
+
+static struct cpuidle_state chv_cstates[CPUIDLE_STATE_MAX] = {
+	{ /* MWAIT C1 */
+		.name = "C1-ATM",
+		.desc = "MWAIT 0x00",
+		.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+		.exit_latency = 1,
+		.target_residency = 4,
+		.enter = &intel_idle },
+	{ /* MWAIT C4 */
+		.name = "C4-ATM",
+		.desc = "MWAIT 0x30",
+		.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TIME_VALID
+						| CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 100,
+		.target_residency = 400,
+		.enter = &intel_idle },
+	{ /* MWAIT C6 */
+		.name = "C6-ATM",
+		.desc = "MWAIT 0x52",
+		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID
+						| CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 140,
+		.target_residency = 560,
+		.enter = &intel_idle },
+	{ /* MWAIT C7-S0i1 */
+		.name = "S0i1-ATM",
+		.desc = "MWAIT 0x60",
+		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID
+						| CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 1200,
+		.target_residency = 4000,
+		.enter = &intel_idle },
+	{ /* MWAIT C8-S0i2 */
+		.name = "S0i2-ATM",
+		.desc = "MWAIT 0x62",
+		.flags = MWAIT2flg(0x62) | CPUIDLE_FLAG_TIME_VALID
+						| CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 2000,
+		.target_residency = 8000,
+		.enter = &intel_idle },
+	{ /* MWAIT C9-S0i3 */
+		.name = "S0i3-ATM",
+		.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 avn_cstates[] = {
 	{
 		.name = "C1-AVN",
@@ -702,6 +755,10 @@ static const struct idle_cpu idle_cpu_avn = {
 	.disable_promotion_to_c1e = true,
 };
 
+static const struct idle_cpu idle_cpu_chv = {
+	.state_table = chv_cstates,
+};
+
 #define ICPU(model, cpu) \
 	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
 
@@ -725,6 +782,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
 	ICPU(0x3f, idle_cpu_hsw),
 	ICPU(0x45, idle_cpu_hsw),
 	ICPU(0x46, idle_cpu_hsw),
+	ICPU(0x4c, idle_cpu_chv),
 	ICPU(0x4d, idle_cpu_avn),
 	ICPU(0x3d, idle_cpu_bdw),
 	ICPU(0x4f, idle_cpu_bdw),
-- 
2.1.0

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