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Merge branch 'pm-cpufreq'

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* pm-cpufreq: (31 commits)
  cpufreq: Fix cpufreq_online() return value on errors
  cpufreq: Fix up several kerneldoc comments
  cpufreq: stats: Use local_clock() instead of jiffies
  cpufreq: schedutil: Simplify sugov_update_next_freq()
  cpufreq: intel_pstate: Simplify intel_cpufreq_update_pstate()
  cpufreq: arm_scmi: Discover the power scale in performance protocol
  firmware: arm_scmi: Add power_scale_mw_get() interface
  cpufreq: tegra194: Rename tegra194_get_speed_common function
  cpufreq: tegra194: Remove unnecessary frequency calculation
  cpufreq: tegra186: Simplify cluster information lookup
  cpufreq: tegra186: Fix sparse 'incorrect type in assignment' warning
  cpufreq: imx: fix NVMEM_IMX_OCOTP dependency
  cpufreq: vexpress-spc: Add missing MODULE_ALIAS
  cpufreq: scpi: Add missing MODULE_ALIAS
  cpufreq: loongson1: Add missing MODULE_ALIAS
  cpufreq: sun50i: Add missing MODULE_DEVICE_TABLE
  cpufreq: st: Add missing MODULE_DEVICE_TABLE
  cpufreq: qcom: Add missing MODULE_DEVICE_TABLE
  cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE
  cpufreq: highbank: Add missing MODULE_DEVICE_TABLE
  ...
This commit is contained in:
Rafael J. Wysocki 2020-12-15 15:24:52 +01:00
commit e1f1320fc0
25 changed files with 333 additions and 239 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/cpufreq/Kconfig.arm
View File

@ -94,7 +94,7 @@ config ARM_IMX6Q_CPUFREQ
tristate "Freescale i.MX6 cpufreq support"
depends on ARCH_MXC
depends on REGULATOR_ANATOP
select NVMEM_IMX_OCOTP
depends on NVMEM_IMX_OCOTP || COMPILE_TEST
select PM_OPP
help
This adds cpufreq driver support for Freescale i.MX6 series SoCs.

6
drivers/cpufreq/armada-8k-cpufreq.c
View File

@ -204,6 +204,12 @@ static void __exit armada_8k_cpufreq_exit(void)
}
module_exit(armada_8k_cpufreq_exit);
static const struct of_device_id __maybe_unused armada_8k_cpufreq_of_match[] = {
{ .compatible = "marvell,ap806-cpu-clock" },
{ },
};
MODULE_DEVICE_TABLE(of, armada_8k_cpufreq_of_match);
MODULE_AUTHOR("Gregory Clement <gregory.clement@bootlin.com>");
MODULE_DESCRIPTION("Armada 8K cpufreq driver");
MODULE_LICENSE("GPL");

163
drivers/cpufreq/cppc_cpufreq.c
View File

@ -26,8 +26,8 @@
/* Minimum struct length needed for the DMI processor entry we want */
#define DMI_ENTRY_PROCESSOR_MIN_LENGTH 48
/* Offest in the DMI processor structure for the max frequency */
#define DMI_PROCESSOR_MAX_SPEED 0x14
/* Offset in the DMI processor structure for the max frequency */
#define DMI_PROCESSOR_MAX_SPEED 0x14
/*
* These structs contain information parsed from per CPU
@ -96,11 +96,11 @@ static u64 cppc_get_dmi_max_khz(void)
* and extrapolate the rest
* For perf/freq > Nominal, we use the ratio perf:freq at Nominal for conversion
*/
static unsigned int cppc_cpufreq_perf_to_khz(struct cppc_cpudata *cpu,
unsigned int perf)
static unsigned int cppc_cpufreq_perf_to_khz(struct cppc_cpudata *cpu_data,
unsigned int perf)
{
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
static u64 max_khz;
struct cppc_perf_caps *caps = &cpu->perf_caps;
u64 mul, div;
if (caps->lowest_freq && caps->nominal_freq) {
@ -120,11 +120,11 @@ static unsigned int cppc_cpufreq_perf_to_khz(struct cppc_cpudata *cpu,
return (u64)perf * mul / div;
}
static unsigned int cppc_cpufreq_khz_to_perf(struct cppc_cpudata *cpu,
unsigned int freq)
static unsigned int cppc_cpufreq_khz_to_perf(struct cppc_cpudata *cpu_data,
unsigned int freq)
{
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
static u64 max_khz;
struct cppc_perf_caps *caps = &cpu->perf_caps;
u64 mul, div;
if (caps->lowest_freq && caps->nominal_freq) {
@ -146,32 +146,30 @@ static unsigned int cppc_cpufreq_khz_to_perf(struct cppc_cpudata *cpu,
}
static int cppc_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
unsigned int target_freq,
unsigned int relation)
{
struct cppc_cpudata *cpu;
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cpufreq_freqs freqs;
u32 desired_perf;
int ret = 0;
cpu = all_cpu_data[policy->cpu];
desired_perf = cppc_cpufreq_khz_to_perf(cpu, target_freq);
desired_perf = cppc_cpufreq_khz_to_perf(cpu_data, target_freq);
/* Return if it is exactly the same perf */
if (desired_perf == cpu->perf_ctrls.desired_perf)
if (desired_perf == cpu_data->perf_ctrls.desired_perf)
return ret;
cpu->perf_ctrls.desired_perf = desired_perf;
cpu_data->perf_ctrls.desired_perf = desired_perf;
freqs.old = policy->cur;
freqs.new = target_freq;
cpufreq_freq_transition_begin(policy, &freqs);
ret = cppc_set_perf(cpu->cpu, &cpu->perf_ctrls);
ret = cppc_set_perf(cpu_data->cpu, &cpu_data->perf_ctrls);
cpufreq_freq_transition_end(policy, &freqs, ret != 0);
if (ret)
pr_debug("Failed to set target on CPU:%d. ret:%d\n",
cpu->cpu, ret);
cpu_data->cpu, ret);
return ret;
}
@ -184,28 +182,29 @@ static int cppc_verify_policy(struct cpufreq_policy_data *policy)
static void cppc_cpufreq_stop_cpu(struct cpufreq_policy *policy)
{
int cpu_num = policy->cpu;
struct cppc_cpudata *cpu = all_cpu_data[cpu_num];
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
unsigned int cpu = policy->cpu;
int ret;
cpu->perf_ctrls.desired_perf = cpu->perf_caps.lowest_perf;
cpu_data->perf_ctrls.desired_perf = caps->lowest_perf;
ret = cppc_set_perf(cpu_num, &cpu->perf_ctrls);
ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls);
if (ret)
pr_debug("Err setting perf value:%d on CPU:%d. ret:%d\n",
cpu->perf_caps.lowest_perf, cpu_num, ret);
caps->lowest_perf, cpu, ret);
}
/*
* The PCC subspace describes the rate at which platform can accept commands
* on the shared PCC channel (including READs which do not count towards freq
* trasition requests), so ideally we need to use the PCC values as a fallback
* transition requests), so ideally we need to use the PCC values as a fallback
* if we don't have a platform specific transition_delay_us
*/
#ifdef CONFIG_ARM64
#include <asm/cputype.h>
static unsigned int cppc_cpufreq_get_transition_delay_us(int cpu)
static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
{
unsigned long implementor = read_cpuid_implementor();
unsigned long part_num = read_cpuid_part_number();
@ -233,7 +232,7 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(int cpu)
#else
static unsigned int cppc_cpufreq_get_transition_delay_us(int cpu)
static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
{
return cppc_get_transition_latency(cpu) / NSEC_PER_USEC;
}
@ -241,54 +240,57 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(int cpu)
static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
struct cppc_cpudata *cpu;
unsigned int cpu_num = policy->cpu;
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
unsigned int cpu = policy->cpu;
int ret = 0;
cpu = all_cpu_data[policy->cpu];
cpu->cpu = cpu_num;
ret = cppc_get_perf_caps(policy->cpu, &cpu->perf_caps);
cpu_data->cpu = cpu;
ret = cppc_get_perf_caps(cpu, caps);
if (ret) {
pr_debug("Err reading CPU%d perf capabilities. ret:%d\n",
cpu_num, ret);
cpu, ret);
return ret;
}
/* Convert the lowest and nominal freq from MHz to KHz */
cpu->perf_caps.lowest_freq *= 1000;
cpu->perf_caps.nominal_freq *= 1000;
caps->lowest_freq *= 1000;
caps->nominal_freq *= 1000;
/*
* Set min to lowest nonlinear perf to avoid any efficiency penalty (see
* Section 8.4.7.1.1.5 of ACPI 6.1 spec)
*/
policy->min = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_nonlinear_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
policy->min = cppc_cpufreq_perf_to_khz(cpu_data,
caps->lowest_nonlinear_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
caps->nominal_perf);
/*
* Set cpuinfo.min_freq to Lowest to make the full range of performance
* available if userspace wants to use any perf between lowest & lowest
* nonlinear perf
*/
policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_perf);
policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu_data,
caps->lowest_perf);
policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu_data,
caps->nominal_perf);
policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu_num);
policy->shared_type = cpu->shared_type;
policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu);
policy->shared_type = cpu_data->shared_type;
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
int i;
cpumask_copy(policy->cpus, cpu->shared_cpu_map);
cpumask_copy(policy->cpus, cpu_data->shared_cpu_map);
for_each_cpu(i, policy->cpus) {
if (unlikely(i == policy->cpu))
if (unlikely(i == cpu))
continue;
memcpy(&all_cpu_data[i]->perf_caps, &cpu->perf_caps,
sizeof(cpu->perf_caps));
memcpy(&all_cpu_data[i]->perf_caps, caps,
sizeof(cpu_data->perf_caps));
}
} else if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL) {
/* Support only SW_ANY for now. */
@ -296,24 +298,23 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
return -EFAULT;
}
cpu->cur_policy = policy;
cpu_data->cur_policy = policy;
/*
* If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
* is supported.
*/
if (cpu->perf_caps.highest_perf > cpu->perf_caps.nominal_perf)
if (caps->highest_perf > caps->nominal_perf)
boost_supported = true;
/* Set policy->cur to max now. The governors will adjust later. */
policy->cur = cppc_cpufreq_perf_to_khz(cpu,
cpu->perf_caps.highest_perf);
cpu->perf_ctrls.desired_perf = cpu->perf_caps.highest_perf;
policy->cur = cppc_cpufreq_perf_to_khz(cpu_data, caps->highest_perf);
cpu_data->perf_ctrls.desired_perf = caps->highest_perf;
ret = cppc_set_perf(cpu_num, &cpu->perf_ctrls);
ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls);
if (ret)
pr_debug("Err setting perf value:%d on CPU:%d. ret:%d\n",
cpu->perf_caps.highest_perf, cpu_num, ret);
caps->highest_perf, cpu, ret);
return ret;
}
@ -326,7 +327,7 @@ static inline u64 get_delta(u64 t1, u64 t0)
return (u32)t1 - (u32)t0;
}
static int cppc_get_rate_from_fbctrs(struct cppc_cpudata *cpu,
static int cppc_get_rate_from_fbctrs(struct cppc_cpudata *cpu_data,
struct cppc_perf_fb_ctrs fb_ctrs_t0,
struct cppc_perf_fb_ctrs fb_ctrs_t1)
{
@ -345,33 +346,34 @@ static int cppc_get_rate_from_fbctrs(struct cppc_cpudata *cpu,
delivered_perf = (reference_perf * delta_delivered) /
delta_reference;
else
delivered_perf = cpu->perf_ctrls.desired_perf;
delivered_perf = cpu_data->perf_ctrls.desired_perf;
return cppc_cpufreq_perf_to_khz(cpu, delivered_perf);
return cppc_cpufreq_perf_to_khz(cpu_data, delivered_perf);
}
static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
static unsigned int cppc_cpufreq_get_rate(unsigned int cpu)
{
struct cppc_perf_fb_ctrs fb_ctrs_t0 = {0}, fb_ctrs_t1 = {0};
struct cppc_cpudata *cpu = all_cpu_data[cpunum];
struct cppc_cpudata *cpu_data = all_cpu_data[cpu];
int ret;
ret = cppc_get_perf_ctrs(cpunum, &fb_ctrs_t0);
ret = cppc_get_perf_ctrs(cpu, &fb_ctrs_t0);
if (ret)
return ret;
udelay(2); /* 2usec delay between sampling */
ret = cppc_get_perf_ctrs(cpunum, &fb_ctrs_t1);
ret = cppc_get_perf_ctrs(cpu, &fb_ctrs_t1);
if (ret)
return ret;
return cppc_get_rate_from_fbctrs(cpu, fb_ctrs_t0, fb_ctrs_t1);
return cppc_get_rate_from_fbctrs(cpu_data, fb_ctrs_t0, fb_ctrs_t1);
}
static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
{
struct cppc_cpudata *cpudata;
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
int ret;
if (!boost_supported) {
@ -379,13 +381,12 @@ static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
return -EINVAL;
}
cpudata = all_cpu_data[policy->cpu];
if (state)
policy->max = cppc_cpufreq_perf_to_khz(cpudata,
cpudata->perf_caps.highest_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
caps->highest_perf);
else
policy->max = cppc_cpufreq_perf_to_khz(cpudata,
cpudata->perf_caps.nominal_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
caps->nominal_perf);
policy->cpuinfo.max_freq = policy->max;
ret = freq_qos_update_request(policy->max_freq_req, policy->max);
@ -412,17 +413,17 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
* platform specific mechanism. We reuse the desired performance register to
* store the real performance calculated by the platform.
*/
static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpunum)
static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpu)
{
struct cppc_cpudata *cpudata = all_cpu_data[cpunum];
struct cppc_cpudata *cpu_data = all_cpu_data[cpu];
u64 desired_perf;
int ret;
ret = cppc_get_desired_perf(cpunum, &desired_perf);
ret = cppc_get_desired_perf(cpu, &desired_perf);
if (ret < 0)
return -EIO;
return cppc_cpufreq_perf_to_khz(cpudata, desired_perf);
return cppc_cpufreq_perf_to_khz(cpu_data, desired_perf);
}
static void cppc_check_hisi_workaround(void)
@ -450,8 +451,8 @@ static void cppc_check_hisi_workaround(void)
static int __init cppc_cpufreq_init(void)
{
struct cppc_cpudata *cpu_data;
int i, ret = 0;
struct cppc_cpudata *cpu;
if (acpi_disabled)
return -ENODEV;
@ -466,8 +467,8 @@ static int __init cppc_cpufreq_init(void)
if (!all_cpu_data[i])
goto out;
cpu = all_cpu_data[i];
if (!zalloc_cpumask_var(&cpu->shared_cpu_map, GFP_KERNEL))
cpu_data = all_cpu_data[i];
if (!zalloc_cpumask_var(&cpu_data->shared_cpu_map, GFP_KERNEL))
goto out;
}
@ -487,11 +488,11 @@ static int __init cppc_cpufreq_init(void)
out:
for_each_possible_cpu(i) {
cpu = all_cpu_data[i];
if (!cpu)
cpu_data = all_cpu_data[i];
if (!cpu_data)
break;
free_cpumask_var(cpu->shared_cpu_map);
kfree(cpu);
free_cpumask_var(cpu_data->shared_cpu_map);
kfree(cpu_data);
}
kfree(all_cpu_data);
@ -500,15 +501,15 @@ out:
static void __exit cppc_cpufreq_exit(void)
{
struct cppc_cpudata *cpu;
struct cppc_cpudata *cpu_data;
int i;
cpufreq_unregister_driver(&cppc_cpufreq_driver);
for_each_possible_cpu(i) {
cpu = all_cpu_data[i];
free_cpumask_var(cpu->shared_cpu_map);
kfree(cpu);
cpu_data = all_cpu_data[i];
free_cpumask_var(cpu_data->shared_cpu_map);
kfree(cpu_data);
}
kfree(all_cpu_data);

2
drivers/cpufreq/cpufreq-dt-platdev.c
View File

@ -119,10 +119,12 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "mediatek,mt2712", },
{ .compatible = "mediatek,mt7622", },
{ .compatible = "mediatek,mt7623", },
{ .compatible = "mediatek,mt8167", },
{ .compatible = "mediatek,mt817x", },
{ .compatible = "mediatek,mt8173", },
{ .compatible = "mediatek,mt8176", },
{ .compatible = "mediatek,mt8183", },
{ .compatible = "mediatek,mt8516", },
{ .compatible = "nvidia,tegra20", },
{ .compatible = "nvidia,tegra30", },

85
drivers/cpufreq/cpufreq.c
View File

@ -298,8 +298,10 @@ struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu)
* EXTERNALLY AFFECTING FREQUENCY CHANGES *
*********************************************************************/
/*
* adjust_jiffies - adjust the system "loops_per_jiffy"
/**
* adjust_jiffies - Adjust the system "loops_per_jiffy".
* @val: CPUFREQ_PRECHANGE or CPUFREQ_POSTCHANGE.
* @ci: Frequency change information.
*
* This function alters the system "loops_per_jiffy" for the clock
* speed change. Note that loops_per_jiffy cannot be updated on SMP
@ -331,14 +333,14 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
}
/**
* cpufreq_notify_transition - Notify frequency transition and adjust_jiffies.
* cpufreq_notify_transition - Notify frequency transition and adjust jiffies.
* @policy: cpufreq policy to enable fast frequency switching for.
* @freqs: contain details of the frequency update.
* @state: set to CPUFREQ_PRECHANGE or CPUFREQ_POSTCHANGE.
*
* This function calls the transition notifiers and the "adjust_jiffies"
* function. It is called twice on all CPU frequency changes that have
* external effects.
* This function calls the transition notifiers and adjust_jiffies().
*
* It is called twice on all CPU frequency changes that have external effects.
*/
static void cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs,
@ -1391,8 +1393,10 @@ static int cpufreq_online(unsigned int cpu)
policy->min_freq_req = kzalloc(2 * sizeof(*policy->min_freq_req),
GFP_KERNEL);
if (!policy->min_freq_req)
if (!policy->min_freq_req) {
ret = -ENOMEM;
goto out_destroy_policy;
}
ret = freq_qos_add_request(&policy->constraints,
policy->min_freq_req, FREQ_QOS_MIN,
@ -1429,6 +1433,7 @@ static int cpufreq_online(unsigned int cpu)
if (cpufreq_driver->get && has_target()) {
policy->cur = cpufreq_driver->get(policy->cpu);
if (!policy->cur) {
ret = -EIO;
pr_err("%s: ->get() failed\n", __func__);
goto out_destroy_policy;
}
@ -1646,13 +1651,12 @@ static void cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
}
/**
* cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
* in deep trouble.
* @policy: policy managing CPUs
* @new_freq: CPU frequency the CPU actually runs at
* cpufreq_out_of_sync - Fix up actual and saved CPU frequency difference.
* @policy: Policy managing CPUs.
* @new_freq: New CPU frequency.
*
* We adjust to current frequency first, and need to clean up later.
* So either call to cpufreq_update_policy() or schedule handle_update()).
* Adjust to the current frequency first and clean up later by either calling
* cpufreq_update_policy(), or scheduling handle_update().
*/
static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
unsigned int new_freq)
@ -1832,7 +1836,7 @@ int cpufreq_generic_suspend(struct cpufreq_policy *policy)
EXPORT_SYMBOL(cpufreq_generic_suspend);
/**
* cpufreq_suspend() - Suspend CPUFreq governors
* cpufreq_suspend() - Suspend CPUFreq governors.
*
* Called during system wide Suspend/Hibernate cycles for suspending governors
* as some platforms can't change frequency after this point in suspend cycle.
@ -1868,7 +1872,7 @@ suspend:
}
/**
* cpufreq_resume() - Resume CPUFreq governors
* cpufreq_resume() - Resume CPUFreq governors.
*
* Called during system wide Suspend/Hibernate cycle for resuming governors that
* are suspended with cpufreq_suspend().
@ -1920,10 +1924,10 @@ bool cpufreq_driver_test_flags(u16 flags)
}
/**
* cpufreq_get_current_driver - return current driver's name
* cpufreq_get_current_driver - Return the current driver's name.
*
* Return the name string of the currently loaded cpufreq driver
* or NULL, if none.
* Return the name string of the currently registered cpufreq driver or NULL if
* none.
*/
const char *cpufreq_get_current_driver(void)
{
@ -1935,10 +1939,10 @@ const char *cpufreq_get_current_driver(void)
EXPORT_SYMBOL_GPL(cpufreq_get_current_driver);
/**
* cpufreq_get_driver_data - return current driver data
* cpufreq_get_driver_data - Return current driver data.
*
* Return the private data of the currently loaded cpufreq
* driver, or NULL if no cpufreq driver is loaded.
* Return the private data of the currently registered cpufreq driver, or NULL
* if no cpufreq driver has been registered.
*/
void *cpufreq_get_driver_data(void)
{
@ -1954,17 +1958,16 @@ EXPORT_SYMBOL_GPL(cpufreq_get_driver_data);
*********************************************************************/
/**
* cpufreq_register_notifier - register a driver with cpufreq
* @nb: notifier function to register
* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
* cpufreq_register_notifier - Register a notifier with cpufreq.
* @nb: notifier function to register.
* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER.
*
* Add a driver to one of two lists: either a list of drivers that
* are notified about clock rate changes (once before and once after
* the transition), or a list of drivers that are notified about
* changes in cpufreq policy.
* Add a notifier to one of two lists: either a list of notifiers that run on
* clock rate changes (once before and once after every transition), or a list
* of notifiers that ron on cpufreq policy changes.
*
* This function may sleep, and has the same return conditions as
* blocking_notifier_chain_register.
* This function may sleep and it has the same return values as
* blocking_notifier_chain_register().
*/
int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
{
@ -2001,14 +2004,14 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
EXPORT_SYMBOL(cpufreq_register_notifier);
/**
* cpufreq_unregister_notifier - unregister a driver with cpufreq
* @nb: notifier block to be unregistered
* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
* cpufreq_unregister_notifier - Unregister a notifier from cpufreq.
* @nb: notifier block to be unregistered.
* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER.
*
* Remove a driver from the CPU frequency notifier list.
* Remove a notifier from one of the cpufreq notifier lists.
*
* This function may sleep, and has the same return conditions as
* blocking_notifier_chain_unregister.
* This function may sleep and it has the same return values as
* blocking_notifier_chain_unregister().
*/
int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list)
{
@ -2123,7 +2126,7 @@ static int __target_intermediate(struct cpufreq_policy *policy,
static int __target_index(struct cpufreq_policy *policy, int index)
{
struct cpufreq_freqs freqs = {.old = policy->cur, .flags = 0};
unsigned int intermediate_freq = 0;
unsigned int restore_freq, intermediate_freq = 0;
unsigned int newfreq = policy->freq_table[index].frequency;
int retval = -EINVAL;
bool notify;
@ -2131,6 +2134,9 @@ static int __target_index(struct cpufreq_policy *policy, int index)
if (newfreq == policy->cur)
return 0;
/* Save last value to restore later on errors */
restore_freq = policy->cur;
notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
if (notify) {
/* Handle switching to intermediate frequency */
@ -2168,7 +2174,7 @@ static int __target_index(struct cpufreq_policy *policy, int index)
*/
if (unlikely(retval && intermediate_freq)) {
freqs.old = intermediate_freq;
freqs.new = policy->restore_freq;
freqs.new = restore_freq;
cpufreq_freq_transition_begin(policy, &freqs);
cpufreq_freq_transition_end(policy, &freqs, 0);
}
@ -2203,9 +2209,6 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
!(cpufreq_driver->flags & CPUFREQ_NEED_UPDATE_LIMITS))
return 0;
/* Save last value to restore later on errors */
policy->restore_freq = policy->cur;
if (cpufreq_driver->target)
return cpufreq_driver->target(policy, target_freq, relation);

16
drivers/cpufreq/cpufreq_stats.c
View File

@ -9,9 +9,9 @@
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/sched/clock.h>
#include <linux/slab.h>
struct cpufreq_stats {
unsigned int total_trans;
unsigned long long last_time;
@ -30,7 +30,7 @@ struct cpufreq_stats {
static void cpufreq_stats_update(struct cpufreq_stats *stats,
unsigned long long time)
{
unsigned long long cur_time = get_jiffies_64();
unsigned long long cur_time = local_clock();
stats->time_in_state[stats->last_index] += cur_time - time;
stats->last_time = cur_time;
@ -42,7 +42,7 @@ static void cpufreq_stats_reset_table(struct cpufreq_stats *stats)
memset(stats->time_in_state, 0, count * sizeof(u64));
memset(stats->trans_table, 0, count * count * sizeof(int));
stats->last_time = get_jiffies_64();
stats->last_time = local_clock();
stats->total_trans = 0;
/* Adjust for the time elapsed since reset was requested */
@ -82,18 +82,18 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
* before the reset_pending read above.
*/
smp_rmb();
time = get_jiffies_64() - READ_ONCE(stats->reset_time);
time = local_clock() - READ_ONCE(stats->reset_time);
} else {
time = 0;
}
} else {
time = stats->time_in_state[i];
if (i == stats->last_index)
time += get_jiffies_64() - stats->last_time;
time += local_clock() - stats->last_time;
}
len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
jiffies_64_to_clock_t(time));
nsec_to_clock_t(time));
}
return len;
}
@ -109,7 +109,7 @@ static ssize_t store_reset(struct cpufreq_policy *policy, const char *buf,
* Defer resetting of stats to cpufreq_stats_record_transition() to
* avoid races.
*/
WRITE_ONCE(stats->reset_time, get_jiffies_64());
WRITE_ONCE(stats->reset_time, local_clock());
/*
* The memory barrier below is to prevent the readers of reset_time from
* seeing a stale or partially updated value.
@ -249,7 +249,7 @@ void cpufreq_stats_create_table(struct cpufreq_policy *policy)
stats->freq_table[i++] = pos->frequency;
stats->state_num = i;
stats->last_time = get_jiffies_64();
stats->last_time = local_clock();
stats->last_index = freq_table_get_index(stats, policy->cur);
policy->stats = stats;

7
drivers/cpufreq/highbank-cpufreq.c
View File

@ -101,6 +101,13 @@ out_put_node:
}
module_init(hb_cpufreq_driver_init);
static const struct of_device_id __maybe_unused hb_cpufreq_of_match[] = {
{ .compatible = "calxeda,highbank" },
{ .compatible = "calxeda,ecx-2000" },
{ },
};
MODULE_DEVICE_TABLE(of, hb_cpufreq_of_match);
MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@calxeda.com>");
MODULE_DESCRIPTION("Calxeda Highbank cpufreq driver");
MODULE_LICENSE("GPL");

9
drivers/cpufreq/intel_pstate.c
View File

@ -2569,14 +2569,13 @@ static int intel_cpufreq_update_pstate(struct cpufreq_policy *policy,
int old_pstate = cpu->pstate.current_pstate;
target_pstate = intel_pstate_prepare_request(cpu, target_pstate);
if (hwp_active) {
if (hwp_active)
intel_cpufreq_adjust_hwp(cpu, target_pstate,
policy->strict_target, fast_switch);
cpu->pstate.current_pstate = target_pstate;
} else if (target_pstate != old_pstate) {
else if (target_pstate != old_pstate)
intel_cpufreq_adjust_perf_ctl(cpu, target_pstate, fast_switch);
cpu->pstate.current_pstate = target_pstate;
}
cpu->pstate.current_pstate = target_pstate;
intel_cpufreq_trace(cpu, fast_switch ? INTEL_PSTATE_TRACE_FAST_SWITCH :
INTEL_PSTATE_TRACE_TARGET, old_pstate);

1
drivers/cpufreq/loongson1-cpufreq.c
View File

@ -216,6 +216,7 @@ static struct platform_driver ls1x_cpufreq_platdrv = {
module_platform_driver(ls1x_cpufreq_platdrv);
MODULE_ALIAS("platform:ls1x-cpufreq");
MODULE_AUTHOR("Kelvin Cheung <keguang.zhang@gmail.com>");
MODULE_DESCRIPTION("Loongson1 CPUFreq driver");
MODULE_LICENSE("GPL");

3
drivers/cpufreq/mediatek-cpufreq.c
View File

@ -532,6 +532,7 @@ static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
{ .compatible = "mediatek,mt2712", },
{ .compatible = "mediatek,mt7622", },
{ .compatible = "mediatek,mt7623", },
{ .compatible = "mediatek,mt8167", },
{ .compatible = "mediatek,mt817x", },
{ .compatible = "mediatek,mt8173", },
{ .compatible = "mediatek,mt8176", },
@ -540,6 +541,7 @@ static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
{ }
};
MODULE_DEVICE_TABLE(of, mtk_cpufreq_machines);
static int __init mtk_cpufreq_driver_init(void)
{
@ -572,6 +574,7 @@ static int __init mtk_cpufreq_driver_init(void)
pdev = platform_device_register_simple("mtk-cpufreq", -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("failed to register mtk-cpufreq platform device\n");
platform_driver_unregister(&mtk_cpufreq_platdrv);
return PTR_ERR(pdev);
}

1
drivers/cpufreq/qcom-cpufreq-nvmem.c
View File

@ -461,6 +461,7 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
{ .compatible = "qcom,msm8960", .data = &match_data_krait },
{},
};
MODULE_DEVICE_TABLE(of, qcom_cpufreq_match_list);
/*
* Since the driver depends on smem and nvmem drivers, which may

5
drivers/cpufreq/scmi-cpufreq.c
View File

@ -126,6 +126,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
struct scmi_data *priv;
struct cpufreq_frequency_table *freq_table;
struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power);
bool power_scale_mw;
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
@ -189,7 +190,9 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
policy->fast_switch_possible =
handle->perf_ops->fast_switch_possible(handle, cpu_dev);
em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus);
power_scale_mw = handle->perf_ops->power_scale_mw_get(handle);
em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus,
power_scale_mw);
return 0;

1
drivers/cpufreq/scpi-cpufreq.c
View File

@ -233,6 +233,7 @@ static struct platform_driver scpi_cpufreq_platdrv = {
};
module_platform_driver(scpi_cpufreq_platdrv);
MODULE_ALIAS("platform:scpi-cpufreq");
MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
MODULE_DESCRIPTION("ARM SCPI CPUFreq interface driver");
MODULE_LICENSE("GPL v2");

14
drivers/cpufreq/sti-cpufreq.c
View File

@ -223,7 +223,8 @@ use_defaults:
opp_table = dev_pm_opp_set_supported_hw(dev, version, VERSION_ELEMENTS);
if (IS_ERR(opp_table)) {
dev_err(dev, "Failed to set supported hardware\n");
return PTR_ERR(opp_table);
ret = PTR_ERR(opp_table);
goto err_put_prop_name;
}
dev_dbg(dev, "pcode: %d major: %d minor: %d substrate: %d\n",
@ -232,6 +233,10 @@ use_defaults:
version[0], version[1], version[2]);
return 0;
err_put_prop_name:
dev_pm_opp_put_prop_name(opp_table);
return ret;
}
static int sti_cpufreq_fetch_syscon_registers(void)
@ -292,6 +297,13 @@ register_cpufreq_dt:
}
module_init(sti_cpufreq_init);
static const struct of_device_id __maybe_unused sti_cpufreq_of_match[] = {
{ .compatible = "st,stih407" },
{ .compatible = "st,stih410" },
{ },
};
MODULE_DEVICE_TABLE(of, sti_cpufreq_of_match);
MODULE_DESCRIPTION("STMicroelectronics CPUFreq/OPP driver");
MODULE_AUTHOR("Ajitpal Singh <ajitpal.singh@st.com>");
MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org>");

1
drivers/cpufreq/sun50i-cpufreq-nvmem.c
View File

@ -167,6 +167,7 @@ static const struct of_device_id sun50i_cpufreq_match_list[] = {
{ .compatible = "allwinner,sun50i-h6" },
{}
};
MODULE_DEVICE_TABLE(of, sun50i_cpufreq_match_list);
static const struct of_device_id *sun50i_cpufreq_match_node(void)
{

126
drivers/cpufreq/tegra186-cpufreq.c
View File

@ -12,35 +12,52 @@
#include <soc/tegra/bpmp.h>
#include <soc/tegra/bpmp-abi.h>
#define EDVD_CORE_VOLT_FREQ(core) (0x20 + (core) * 0x4)
#define EDVD_CORE_VOLT_FREQ_F_SHIFT 0
#define EDVD_CORE_VOLT_FREQ_F_MASK 0xffff
#define EDVD_CORE_VOLT_FREQ_V_SHIFT 16
#define TEGRA186_NUM_CLUSTERS 2
#define EDVD_OFFSET_A57(core) ((SZ_64K * 6) + (0x20 + (core) * 0x4))
#define EDVD_OFFSET_DENVER(core) ((SZ_64K * 7) + (0x20 + (core) * 0x4))
#define EDVD_CORE_VOLT_FREQ_F_SHIFT 0
#define EDVD_CORE_VOLT_FREQ_F_MASK 0xffff
#define EDVD_CORE_VOLT_FREQ_V_SHIFT 16
struct tegra186_cpufreq_cluster_info {
unsigned long offset;
int cpus[4];
struct tegra186_cpufreq_cpu {
unsigned int bpmp_cluster_id;
unsigned int edvd_offset;
};
#define NO_CPU -1
static const struct tegra186_cpufreq_cluster_info tegra186_clusters[] = {
/* Denver cluster */
static const struct tegra186_cpufreq_cpu tegra186_cpus[] = {
/* CPU0 - A57 Cluster */
{
.offset = SZ_64K * 7,
.cpus = { 1, 2, NO_CPU, NO_CPU },
.bpmp_cluster_id = 0,
},
/* A57 cluster */
{
.offset = SZ_64K * 6,
.cpus = { 0, 3, 4, 5 },
.bpmp_cluster_id = 1,
.edvd_offset = EDVD_OFFSET_A57(0)
},
/* CPU1 - Denver Cluster */
{
.bpmp_cluster_id = 0,
.edvd_offset = EDVD_OFFSET_DENVER(0)
},
/* CPU2 - Denver Cluster */
{
.bpmp_cluster_id = 0,
.edvd_offset = EDVD_OFFSET_DENVER(1)
},
/* CPU3 - A57 Cluster */
{
.bpmp_cluster_id = 1,
.edvd_offset = EDVD_OFFSET_A57(1)
},
/* CPU4 - A57 Cluster */
{
.bpmp_cluster_id = 1,
.edvd_offset = EDVD_OFFSET_A57(2)
},
/* CPU5 - A57 Cluster */
{
.bpmp_cluster_id = 1,
.edvd_offset = EDVD_OFFSET_A57(3)
},
};
struct tegra186_cpufreq_cluster {
const struct tegra186_cpufreq_cluster_info *info;
struct cpufreq_frequency_table *table;
u32 ref_clk_khz;
u32 div;
@ -48,36 +65,18 @@ struct tegra186_cpufreq_cluster {
struct tegra186_cpufreq_data {
void __iomem *regs;
size_t num_clusters;
struct tegra186_cpufreq_cluster *clusters;
const struct tegra186_cpufreq_cpu *cpus;
};
static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
{
struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
unsigned int i;
for (i = 0; i < data->num_clusters; i++) {
struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
const struct tegra186_cpufreq_cluster_info *info =
cluster->info;
int core;
for (core = 0; core < ARRAY_SIZE(info->cpus); core++) {
if (info->cpus[core] == policy->cpu)
break;
}
if (core == ARRAY_SIZE(info->cpus))
continue;
policy->driver_data =
data->regs + info->offset + EDVD_CORE_VOLT_FREQ(core);
policy->freq_table = cluster->table;
break;
}
unsigned int cluster = data->cpus[policy->cpu].bpmp_cluster_id;
policy->freq_table = data->clusters[cluster].table;
policy->cpuinfo.transition_latency = 300 * 1000;
policy->driver_data = NULL;
return 0;
}
@ -85,11 +84,12 @@ static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{
struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
struct cpufreq_frequency_table *tbl = policy->freq_table + index;
void __iomem *edvd_reg = policy->driver_data;
unsigned int edvd_offset = data->cpus[policy->cpu].edvd_offset;
u32 edvd_val = tbl->driver_data;
writel(edvd_val, edvd_reg);
writel(edvd_val, data->regs + edvd_offset);
return 0;
}
@ -97,35 +97,22 @@ static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
static unsigned int tegra186_cpufreq_get(unsigned int cpu)
{
struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
struct tegra186_cpufreq_cluster *cluster;
struct cpufreq_policy *policy;
void __iomem *edvd_reg;
unsigned int i, freq = 0;
unsigned int edvd_offset, cluster_id;
u32 ndiv;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return 0;
edvd_reg = policy->driver_data;
ndiv = readl(edvd_reg) & EDVD_CORE_VOLT_FREQ_F_MASK;
for (i = 0; i < data->num_clusters; i++) {
struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
int core;
for (core = 0; core < ARRAY_SIZE(cluster->info->cpus); core++) {
if (cluster->info->cpus[core] != policy->cpu)
continue;
freq = (cluster->ref_clk_khz * ndiv) / cluster->div;
goto out;
}
}
out:
edvd_offset = data->cpus[policy->cpu].edvd_offset;
ndiv = readl(data->regs + edvd_offset) & EDVD_CORE_VOLT_FREQ_F_MASK;
cluster_id = data->cpus[policy->cpu].bpmp_cluster_id;
cluster = &data->clusters[cluster_id];
cpufreq_cpu_put(policy);
return freq;
return (cluster->ref_clk_khz * ndiv) / cluster->div;
}
static struct cpufreq_driver tegra186_cpufreq_driver = {
@ -141,7 +128,7 @@ static struct cpufreq_driver tegra186_cpufreq_driver = {
static struct cpufreq_frequency_table *init_vhint_table(
struct platform_device *pdev, struct tegra_bpmp *bpmp,
struct tegra186_cpufreq_cluster *cluster)
struct tegra186_cpufreq_cluster *cluster, unsigned int cluster_id)
{
struct cpufreq_frequency_table *table;
struct mrq_cpu_vhint_request req;
@ -160,7 +147,7 @@ static struct cpufreq_frequency_table *init_vhint_table(
memset(&req, 0, sizeof(req));
req.addr = phys;
req.cluster_id = cluster->info->bpmp_cluster_id;
req.cluster_id = cluster_id;
memset(&msg, 0, sizeof(msg));
msg.mrq = MRQ_CPU_VHINT;
@ -234,12 +221,12 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;
data->clusters = devm_kcalloc(&pdev->dev, ARRAY_SIZE(tegra186_clusters),
data->clusters = devm_kcalloc(&pdev->dev, TEGRA186_NUM_CLUSTERS,
sizeof(*data->clusters), GFP_KERNEL);
if (!data->clusters)
return -ENOMEM;
data->num_clusters = ARRAY_SIZE(tegra186_clusters);
data->cpus = tegra186_cpus;
bpmp = tegra_bpmp_get(&pdev->dev);
if (IS_ERR(bpmp))
@ -251,11 +238,10 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev)
goto put_bpmp;
}
for (i = 0; i < data->num_clusters; i++) {
for (i = 0; i < TEGRA186_NUM_CLUSTERS; i++) {
struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
cluster->info = &tegra186_clusters[i];
cluster->table = init_vhint_table(pdev, bpmp, cluster);
cluster->table = init_vhint_table(pdev, bpmp, cluster, i);
if (IS_ERR(cluster->table)) {
err = PTR_ERR(cluster->table);
goto put_bpmp;

72
drivers/cpufreq/tegra194-cpufreq.c
View File

@ -21,7 +21,6 @@
#define KHZ 1000
#define REF_CLK_MHZ 408 /* 408 MHz */
#define US_DELAY 500
#define US_DELAY_MIN 2
#define CPUFREQ_TBL_STEP_HZ (50 * KHZ * KHZ)
#define MAX_CNT ~0U
@ -44,7 +43,6 @@ struct tegra194_cpufreq_data {
struct tegra_cpu_ctr {
u32 cpu;
u32 delay;
u32 coreclk_cnt, last_coreclk_cnt;
u32 refclk_cnt, last_refclk_cnt;
};
@ -112,7 +110,7 @@ static void tegra_read_counters(struct work_struct *work)
val = read_freq_feedback();
c->last_refclk_cnt = lower_32_bits(val);
c->last_coreclk_cnt = upper_32_bits(val);
udelay(c->delay);
udelay(US_DELAY);
val = read_freq_feedback();
c->refclk_cnt = lower_32_bits(val);
c->coreclk_cnt = upper_32_bits(val);
@ -139,7 +137,7 @@ static void tegra_read_counters(struct work_struct *work)
* @cpu - logical cpu whose freq to be updated
* Returns freq in KHz on success, 0 if cpu is offline
*/
static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
static unsigned int tegra194_calculate_speed(u32 cpu)
{
struct read_counters_work read_counters_work;
struct tegra_cpu_ctr c;
@ -153,7 +151,6 @@ static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
* interrupts enabled.
*/
read_counters_work.c.cpu = cpu;
read_counters_work.c.delay = delay;
INIT_WORK_ONSTACK(&read_counters_work.work, tegra_read_counters);
queue_work_on(cpu, read_counters_wq, &read_counters_work.work);
flush_work(&read_counters_work.work);
@ -180,9 +177,61 @@ static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
return (rate_mhz * KHZ); /* in KHz */
}
static void get_cpu_ndiv(void *ndiv)
{
u64 ndiv_val;
asm volatile("mrs %0, s3_0_c15_c0_4" : "=r" (ndiv_val) : );
*(u64 *)ndiv = ndiv_val;
}
static void set_cpu_ndiv(void *data)
{
struct cpufreq_frequency_table *tbl = data;
u64 ndiv_val = (u64)tbl->driver_data;
asm volatile("msr s3_0_c15_c0_4, %0" : : "r" (ndiv_val));
}
static unsigned int tegra194_get_speed(u32 cpu)
{
return tegra194_get_speed_common(cpu, US_DELAY);
struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
struct cpufreq_frequency_table *pos;
unsigned int rate;
u64 ndiv;
int ret;
u32 cl;
smp_call_function_single(cpu, get_cpu_cluster, &cl, true);
/* reconstruct actual cpu freq using counters */
rate = tegra194_calculate_speed(cpu);
/* get last written ndiv value */
ret = smp_call_function_single(cpu, get_cpu_ndiv, &ndiv, true);
if (WARN_ON_ONCE(ret))
return rate;
/*
* If the reconstructed frequency has acceptable delta from
* the last written value, then return freq corresponding
* to the last written ndiv value from freq_table. This is
* done to return consistent value.
*/
cpufreq_for_each_valid_entry(pos, data->tables[cl]) {
if (pos->driver_data != ndiv)
continue;
if (abs(pos->frequency - rate) > 115200) {
pr_warn("cpufreq: cpu%d,cur:%u,set:%u,set ndiv:%llu\n",
cpu, rate, pos->frequency, ndiv);
} else {
rate = pos->frequency;
}
break;
}
return rate;
}
static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
@ -196,9 +245,6 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
if (cl >= data->num_clusters)
return -EINVAL;
/* boot freq */
policy->cur = tegra194_get_speed_common(policy->cpu, US_DELAY_MIN);
/* set same policy for all cpus in a cluster */
for (cpu = (cl * 2); cpu < ((cl + 1) * 2); cpu++)
cpumask_set_cpu(cpu, policy->cpus);
@ -209,14 +255,6 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
return 0;
}
static void set_cpu_ndiv(void *data)
{
struct cpufreq_frequency_table *tbl = data;
u64 ndiv_val = (u64)tbl->driver_data;
asm volatile("msr s3_0_c15_c0_4, %0" : : "r" (ndiv_val));
}
static int tegra194_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{

1
drivers/cpufreq/vexpress-spc-cpufreq.c
View File

@ -591,6 +591,7 @@ static struct platform_driver ve_spc_cpufreq_platdrv = {
};
module_platform_driver(ve_spc_cpufreq_platdrv);
MODULE_ALIAS("platform:vexpress-spc-cpufreq");
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
MODULE_DESCRIPTION("Vexpress SPC ARM big LITTLE cpufreq driver");

8
drivers/firmware/arm_scmi/perf.c
View File

@ -750,6 +750,13 @@ static bool scmi_fast_switch_possible(const struct scmi_handle *handle,
return dom->fc_info && dom->fc_info->level_set_addr;
}
static bool scmi_power_scale_mw_get(const struct scmi_handle *handle)
{
struct scmi_perf_info *pi = handle->perf_priv;
return pi->power_scale_mw;
}
static const struct scmi_perf_ops perf_ops = {
.limits_set = scmi_perf_limits_set,
.limits_get = scmi_perf_limits_get,
@ -762,6 +769,7 @@ static const struct scmi_perf_ops perf_ops = {
.freq_get = scmi_dvfs_freq_get,
.est_power_get = scmi_dvfs_est_power_get,
.fast_switch_possible = scmi_fast_switch_possible,
.power_scale_mw_get = scmi_power_scale_mw_get,
};
static int scmi_perf_set_notify_enabled(const struct scmi_handle *handle,

2
drivers/opp/of.c
View File

@ -1339,7 +1339,7 @@ int dev_pm_opp_of_register_em(struct device *dev, struct cpumask *cpus)
goto failed;
}
ret = em_dev_register_perf_domain(dev, nr_opp, &em_cb, cpus);
ret = em_dev_register_perf_domain(dev, nr_opp, &em_cb, cpus, true);
if (ret)
goto failed;

5
include/linux/cpufreq.h
View File

@ -65,7 +65,6 @@ struct cpufreq_policy {
unsigned int max; /* in kHz */
unsigned int cur; /* in kHz, only needed if cpufreq
* governors are used */
unsigned int restore_freq; /* = policy->cur before transition */
unsigned int suspend_freq; /* freq to set during suspend */
unsigned int policy; /* see above */
@ -314,10 +313,6 @@ struct cpufreq_driver {
/* define one out of two */
int (*setpolicy)(struct cpufreq_policy *policy);
/*
* On failure, should always restore frequency to policy->restore_freq
* (i.e. old freq).
*/
int (*target)(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation); /* Deprecated */

9
include/linux/energy_model.h
View File

@ -29,6 +29,8 @@ struct em_perf_state {
* em_perf_domain - Performance domain
* @table: List of performance states, in ascending order
* @nr_perf_states: Number of performance states
* @milliwatts: Flag indicating the power values are in milli-Watts
* or some other scale.
* @cpus: Cpumask covering the CPUs of the domain. It's here
* for performance reasons to avoid potential cache
* misses during energy calculations in the scheduler
@ -43,6 +45,7 @@ struct em_perf_state {
struct em_perf_domain {
struct em_perf_state *table;
int nr_perf_states;
int milliwatts;
unsigned long cpus[];
};
@ -79,7 +82,8 @@ struct em_data_callback {
struct em_perf_domain *em_cpu_get(int cpu);
struct em_perf_domain *em_pd_get(struct device *dev);
int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
struct em_data_callback *cb, cpumask_t *span);
struct em_data_callback *cb, cpumask_t *span,
bool milliwatts);
void em_dev_unregister_perf_domain(struct device *dev);
/**
@ -186,7 +190,8 @@ struct em_data_callback {};
static inline
int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
struct em_data_callback *cb, cpumask_t *span)
struct em_data_callback *cb, cpumask_t *span,
bool milliwatts)
{
return -EINVAL;
}

1
include/linux/scmi_protocol.h
View File

@ -121,6 +121,7 @@ struct scmi_perf_ops {
unsigned long *rate, unsigned long *power);
bool (*fast_switch_possible)(const struct scmi_handle *handle,
struct device *dev);
bool (*power_scale_mw_get)(const struct scmi_handle *handle);
};
/**

24
kernel/power/energy_model.c
View File

@ -52,6 +52,17 @@ static int em_debug_cpus_show(struct seq_file *s, void *unused)
}
DEFINE_SHOW_ATTRIBUTE(em_debug_cpus);
static int em_debug_units_show(struct seq_file *s, void *unused)
{
struct em_perf_domain *pd = s->private;
char *units = pd->milliwatts ? "milliWatts" : "bogoWatts";
seq_printf(s, "%s\n", units);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(em_debug_units);
static void em_debug_create_pd(struct device *dev)
{
struct dentry *d;
@ -64,6 +75,8 @@ static void em_debug_create_pd(struct device *dev)
debugfs_create_file("cpus", 0444, d, dev->em_pd->cpus,
&em_debug_cpus_fops);
debugfs_create_file("units", 0444, d, dev->em_pd, &em_debug_units_fops);
/* Create a sub-directory for each performance state */
for (i = 0; i < dev->em_pd->nr_perf_states; i++)
em_debug_create_ps(&dev->em_pd->table[i], d);
@ -250,17 +263,24 @@ EXPORT_SYMBOL_GPL(em_cpu_get);
* @cpus : Pointer to cpumask_t, which in case of a CPU device is
* obligatory. It can be taken from i.e. 'policy->cpus'. For other
* type of devices this should be set to NULL.
* @milliwatts : Flag indicating that the power values are in milliWatts or
* in some other scale. It must be set properly.
*
* Create Energy Model tables for a performance domain using the callbacks
* defined in cb.
*
* The @milliwatts is important to set with correct value. Some kernel
* sub-systems might rely on this flag and check if all devices in the EM are
* using the same scale.
*
* If multiple clients register the same performance domain, all but the first
* registration will be ignored.
*
* Return 0 on success
*/
int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
struct em_data_callback *cb, cpumask_t *cpus)
struct em_data_callback *cb, cpumask_t *cpus,
bool milliwatts)
{
unsigned long cap, prev_cap = 0;
int cpu, ret;
@ -313,6 +333,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
if (ret)
goto unlock;
dev->em_pd->milliwatts = milliwatts;
em_debug_create_pd(dev);
dev_info(dev, "EM: created perf domain\n");

8
kernel/sched/cpufreq_schedutil.c
View File

@ -102,12 +102,10 @@ static bool sugov_should_update_freq(struct sugov_policy *sg_policy, u64 time)
static bool sugov_update_next_freq(struct sugov_policy *sg_policy, u64 time,
unsigned int next_freq)
{
if (!sg_policy->need_freq_update) {
if (sg_policy->next_freq == next_freq)
return false;
} else {
if (sg_policy->need_freq_update)
sg_policy->need_freq_update = cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS);
}
else if (sg_policy->next_freq == next_freq)
return false;
sg_policy->next_freq = next_freq;
sg_policy->last_freq_update_time = time;