xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'pm-cpufreq'

Browse Source 
* pm-cpufreq:
  intel_pstate: skip the driver if ACPI has power mgmt option
  cpufreq: ondemand: Remove redundant return statement
  cpufreq: move freq change notifications to cpufreq core
  cpufreq: distinguish drivers that do asynchronous notifications
  cpufreq/intel_pstate: Add static declarations to internal functions
  cpufreq: arm_big_little: reconfigure switcher behavior at run time
  cpufreq: arm_big_little: add in-kernel switching (IKS) support
  ARM: vexpress/TC2: register vexpress-spc cpufreq device
  cpufreq: arm_big_little: add vexpress SPC interface driver
  ARM: vexpress/TC2: add cpu clock support
  ARM: vexpress/TC2: add support for CPU DVFS
This commit is contained in:
Rafael J. Wysocki
2013-11-07 19:26:02 +01:00
parent adf9684588 fbbcdc0744
commit 15d4cb9013
54 changed files with 1128 additions and 660 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/cpufreq/intel_pstate.c
View File

@@ -25,6 +25,7 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/acpi.h>
#include <trace/events/power.h>
#include <asm/div64.h>
@@ -759,7 +760,7 @@ static int intel_pstate_msrs_not_valid(void)
return 0;
}
void copy_pid_params(struct pstate_adjust_policy *policy)
static void copy_pid_params(struct pstate_adjust_policy *policy)
{
pid_params.sample_rate_ms = policy->sample_rate_ms;
pid_params.p_gain_pct = policy->p_gain_pct;
@@ -769,7 +770,7 @@ void copy_pid_params(struct pstate_adjust_policy *policy)
pid_params.setpoint = policy->setpoint;
}
void copy_cpu_funcs(struct pstate_funcs *funcs)
static void copy_cpu_funcs(struct pstate_funcs *funcs)
{
pstate_funcs.get_max = funcs->get_max;
pstate_funcs.get_min = funcs->get_min;
@@ -777,6 +778,72 @@ void copy_cpu_funcs(struct pstate_funcs *funcs)
pstate_funcs.set = funcs->set;
}
#if IS_ENABLED(CONFIG_ACPI)
#include <acpi/processor.h>
static bool intel_pstate_no_acpi_pss(void)
{
int i;
for_each_possible_cpu(i) {
acpi_status status;
union acpi_object *pss;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_processor *pr = per_cpu(processors, i);
if (!pr)
continue;
status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
if (ACPI_FAILURE(status))
continue;
pss = buffer.pointer;
if (pss && pss->type == ACPI_TYPE_PACKAGE) {
kfree(pss);
return false;
}
kfree(pss);
}
return true;
}
struct hw_vendor_info {
u16 valid;
char oem_id[ACPI_OEM_ID_SIZE];
char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
};
/* Hardware vendor-specific info that has its own power management modes */
static struct hw_vendor_info vendor_info[] = {
{1, "HP ", "ProLiant"},
{0, "", ""},
};
static bool intel_pstate_platform_pwr_mgmt_exists(void)
{
struct acpi_table_header hdr;
struct hw_vendor_info *v_info;
if (acpi_disabled
|| ACPI_FAILURE(acpi_get_table_header(ACPI_SIG_FADT, 0, &hdr)))
return false;
for (v_info = vendor_info; v_info->valid; v_info++) {
if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE)
&& !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE)
&& intel_pstate_no_acpi_pss())
return true;
}
return false;
}
#else /* CONFIG_ACPI not enabled */
static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; }
#endif /* CONFIG_ACPI */
static int __init intel_pstate_init(void)
{
int cpu, rc = 0;
@@ -790,6 +857,13 @@ static int __init intel_pstate_init(void)
if (!id)
return -ENODEV;
/*
* The Intel pstate driver will be ignored if the platform
* firmware has its own power management modes.
*/
if (intel_pstate_platform_pwr_mgmt_exists())
return -ENODEV;
cpu_info = (struct cpu_defaults *)id->driver_data;
copy_pid_params(&cpu_info->pid_policy);