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Commit cab07a56 authored by Len Brown's avatar Len Brown
Browse files

intel_idle: Add support for the Airmont Core in the Cherrytrail and Braswell SOCs 



Support C-states for the Airmont core in the Cherrytrail and Braswell SOCs.
The states are similar to those of Silvermont in Baytrail,
except both flavors of C6 states are faster.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
Cc: Kumar P Mahesh <mahesh.kumar.p@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
parent d7ef7671

drivers/idle/intel_idle.c

+52 −0
Original line number Diff line number Diff line
@@ -253,6 +253,51 @@ static struct cpuidle_state byt_cstates[] = { 
		.enter = NULL }

};



static struct cpuidle_state cht_cstates[] = {

	{

		.name = "C1-CHT",

		.desc = "MWAIT 0x00",

		.flags = MWAIT2flg(0x00),

		.exit_latency = 1,

		.target_residency = 1,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C6N-CHT",

		.desc = "MWAIT 0x58",

		.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 80,

		.target_residency = 275,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C6S-CHT",

		.desc = "MWAIT 0x52",

		.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 200,

		.target_residency = 560,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C7-CHT",

		.desc = "MWAIT 0x60",

		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 1200,

		.target_residency = 4000,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.name = "C7S-CHT",

		.desc = "MWAIT 0x64",

		.flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 10000,

		.target_residency = 20000,

		.enter = &intel_idle,

		.enter_freeze = intel_idle_freeze, },

	{

		.enter = NULL }

};



static struct cpuidle_state ivb_cstates[] = {

	{

		.name = "C1-IVB",
@@ -740,6 +785,12 @@ static const struct idle_cpu idle_cpu_byt = { 
	.byt_auto_demotion_disable_flag = true,

};



static const struct idle_cpu idle_cpu_cht = {

	.state_table = cht_cstates,

	.disable_promotion_to_c1e = true,

	.byt_auto_demotion_disable_flag = true,

};



static const struct idle_cpu idle_cpu_ivb = {

	.state_table = ivb_cstates,

	.disable_promotion_to_c1e = true,
@@ -782,6 +833,7 @@ static const struct x86_cpu_id intel_idle_ids[] = { 
	ICPU(0x2d, idle_cpu_snb),

	ICPU(0x36, idle_cpu_atom),

	ICPU(0x37, idle_cpu_byt),

	ICPU(0x4c, idle_cpu_cht),

	ICPU(0x3a, idle_cpu_ivb),

	ICPU(0x3e, idle_cpu_ivt),

	ICPU(0x3c, idle_cpu_hsw),