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Merge branch 'pm-cpufreq'

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* pm-cpufreq:
  cpufreq: Avoid calling cpufreq_verify_current_freq() from handle_update()
  cpufreq: Consolidate cpufreq_update_current_freq() and __cpufreq_get()
  cpufreq: Don't skip frequency validation for has_target() drivers
  cpufreq: Use has_target() instead of !setpolicy
  cpufreq: Remove redundant !setpolicy check
  cpufreq: Move the IS_ENABLED(CPU_THERMAL) macro into a stub
  cpufreq: s5pv210: Don't flood kernel log after cpufreq change
  cpufreq: pcc-cpufreq: Fail initialization if driver cannot be registered
  cpufreq: add driver for Raspberry Pi
  cpufreq: Switch imx7d to imx-cpufreq-dt for speed grading
  cpufreq: imx-cpufreq-dt: Remove global platform match list
  cpufreq: brcmstb-avs-cpufreq: Fix types for voltage/frequency
  cpufreq: brcmstb-avs-cpufreq: Fix initial command check
  cpufreq: armada-37xx: Remove set but not used variable 'freq'
  cpufreq: imx-cpufreq-dt: Fix no OPPs available on unfused parts
  dt-bindings: imx-cpufreq-dt: Document opp-supported-hw usage
  cpufreq: Add imx-cpufreq-dt driver
This commit is contained in:
Rafael J. Wysocki 2019-07-08 11:00:02 +02:00
commit 586a07dca8
13 changed files with 327 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt Normal file
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@ -0,0 +1,37 @@
i.MX CPUFreq-DT OPP bindings
================================
Certain i.MX SoCs support different OPPs depending on the "market segment" and
"speed grading" value which are written in fuses. These bits are combined with
the opp-supported-hw values for each OPP to check if the OPP is allowed.
Required properties:
--------------------
For each opp entry in 'operating-points-v2' table:
- opp-supported-hw: Two bitmaps indicating:
- Supported speed grade mask
- Supported market segment mask
0: Consumer
1: Extended Consumer
2: Industrial
3: Automotive
Example:
--------
opp_table {
compatible = "operating-points-v2";
opp-1000000000 {
opp-hz = /bits/ 64 <1000000000>;
/* grade >= 0, consumer only */
opp-supported-hw = <0xf>, <0x3>;
};
opp-1300000000 {
opp-hz = /bits/ 64 <1300000000>;
opp-microvolt = <1000000>;
/* grade >= 1, all segments */
opp-supported-hw = <0xe>, <0x7>;
};
}

17
drivers/cpufreq/Kconfig.arm
View File

@ -93,6 +93,15 @@ config ARM_IMX6Q_CPUFREQ
If in doubt, say N.
config ARM_IMX_CPUFREQ_DT
tristate "Freescale i.MX8M cpufreq support"
depends on ARCH_MXC && CPUFREQ_DT
help
This adds cpufreq driver support for Freescale i.MX8M series SoCs,
based on cpufreq-dt.
If in doubt, say N.
config ARM_KIRKWOOD_CPUFREQ
def_bool MACH_KIRKWOOD
help
@ -133,6 +142,14 @@ config ARM_QCOM_CPUFREQ_HW
The driver implements the cpufreq interface for this HW engine.
Say Y if you want to support CPUFreq HW.
config ARM_RASPBERRYPI_CPUFREQ
tristate "Raspberry Pi cpufreq support"
depends on CLK_RASPBERRYPI || COMPILE_TEST
help
This adds the CPUFreq driver for Raspberry Pi
If in doubt, say N.
config ARM_S3C_CPUFREQ
bool
help

2
drivers/cpufreq/Makefile
View File

@ -56,6 +56,7 @@ obj-$(CONFIG_ACPI_CPPC_CPUFREQ) += cppc_cpufreq.o
obj-$(CONFIG_ARCH_DAVINCI) += davinci-cpufreq.o
obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
obj-$(CONFIG_ARM_IMX_CPUFREQ_DT) += imx-cpufreq-dt.o
obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o
obj-$(CONFIG_ARM_MEDIATEK_CPUFREQ) += mediatek-cpufreq.o
obj-$(CONFIG_MACH_MVEBU_V7) += mvebu-cpufreq.o
@ -64,6 +65,7 @@ obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW) += qcom-cpufreq-hw.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o
obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) += raspberrypi-cpufreq.o
obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o

4
drivers/cpufreq/armada-37xx-cpufreq.c
View File

@ -257,7 +257,7 @@ static void __init armada37xx_cpufreq_avs_configure(struct regmap *base,
static void __init armada37xx_cpufreq_avs_setup(struct regmap *base,
struct armada_37xx_dvfs *dvfs)
{
unsigned int avs_val = 0, freq;
unsigned int avs_val = 0;
int load_level = 0;
if (base == NULL)
@ -275,8 +275,6 @@ static void __init armada37xx_cpufreq_avs_setup(struct regmap *base,
for (load_level = 1; load_level < LOAD_LEVEL_NR; load_level++) {
freq = dvfs->cpu_freq_max / dvfs->divider[load_level];
avs_val = dvfs->avs[load_level];
regmap_update_bits(base, ARMADA_37XX_AVS_VSET(load_level-1),
ARMADA_37XX_AVS_VDD_MASK << ARMADA_37XX_AVS_HIGH_VDD_LIMIT |

12
drivers/cpufreq/brcmstb-avs-cpufreq.c
View File

@ -384,12 +384,12 @@ static int brcm_avs_set_pstate(struct private_data *priv, unsigned int pstate)
return __issue_avs_command(priv, AVS_CMD_SET_PSTATE, true, args);
}
static unsigned long brcm_avs_get_voltage(void __iomem *base)
static u32 brcm_avs_get_voltage(void __iomem *base)
{
return readl(base + AVS_MBOX_VOLTAGE1);
}
static unsigned long brcm_avs_get_frequency(void __iomem *base)
static u32 brcm_avs_get_frequency(void __iomem *base)
{
return readl(base + AVS_MBOX_FREQUENCY) * 1000; /* in kHz */
}
@ -446,8 +446,8 @@ static bool brcm_avs_is_firmware_loaded(struct private_data *priv)
rc = brcm_avs_get_pmap(priv, NULL);
magic = readl(priv->base + AVS_MBOX_MAGIC);
return (magic == AVS_FIRMWARE_MAGIC) && (rc != -ENOTSUPP) &&
(rc != -EINVAL);
return (magic == AVS_FIRMWARE_MAGIC) && ((rc != -ENOTSUPP) ||
(rc != -EINVAL));
}
static unsigned int brcm_avs_cpufreq_get(unsigned int cpu)
@ -653,14 +653,14 @@ static ssize_t show_brcm_avs_voltage(struct cpufreq_policy *policy, char *buf)
{
struct private_data *priv = policy->driver_data;
return sprintf(buf, "0x%08lx\n", brcm_avs_get_voltage(priv->base));
return sprintf(buf, "0x%08x\n", brcm_avs_get_voltage(priv->base));
}
static ssize_t show_brcm_avs_frequency(struct cpufreq_policy *policy, char *buf)
{
struct private_data *priv = policy->driver_data;
return sprintf(buf, "0x%08lx\n", brcm_avs_get_frequency(priv->base));
return sprintf(buf, "0x%08x\n", brcm_avs_get_frequency(priv->base));
}
cpufreq_freq_attr_ro(brcm_avs_pstate);

5
drivers/cpufreq/cpufreq-dt-platdev.c
View File

@ -37,7 +37,6 @@ static const struct of_device_id whitelist[] __initconst = {
{ .compatible = "fsl,imx27", },
{ .compatible = "fsl,imx51", },
{ .compatible = "fsl,imx53", },
{ .compatible = "fsl,imx7d", },
{ .compatible = "marvell,berlin", },
{ .compatible = "marvell,pxa250", },
@ -105,6 +104,10 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "calxeda,highbank", },
{ .compatible = "calxeda,ecx-2000", },
{ .compatible = "fsl,imx7d", },
{ .compatible = "fsl,imx8mq", },
{ .compatible = "fsl,imx8mm", },
{ .compatible = "marvell,armadaxp", },
{ .compatible = "mediatek,mt2701", },

115
drivers/cpufreq/cpufreq.c
View File

@ -356,13 +356,11 @@ static void cpufreq_notify_transition(struct cpufreq_policy *policy,
* which is not equal to what the cpufreq core thinks is
* "old frequency".
*/
if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
if (policy->cur && (policy->cur != freqs->old)) {
if (policy->cur && policy->cur != freqs->old) {
pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",
freqs->old, policy->cur);
freqs->old = policy->cur;
}
}
srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_PRECHANGE, freqs);
@ -631,7 +629,7 @@ static int cpufreq_parse_policy(char *str_governor,
}
/**
* cpufreq_parse_governor - parse a governor string only for !setpolicy
* cpufreq_parse_governor - parse a governor string only for has_target()
*/
static int cpufreq_parse_governor(char *str_governor,
struct cpufreq_policy *policy)
@ -1114,13 +1112,25 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp
return ret;
}
static void refresh_frequency_limits(struct cpufreq_policy *policy)
{
struct cpufreq_policy new_policy = *policy;
pr_debug("updating policy for CPU %u\n", policy->cpu);
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
cpufreq_set_policy(policy, &new_policy);
}
static void handle_update(struct work_struct *work)
{
struct cpufreq_policy *policy =
container_of(work, struct cpufreq_policy, update);
unsigned int cpu = policy->cpu;
pr_debug("handle_update for cpu %u called\n", cpu);
cpufreq_update_policy(cpu);
pr_debug("handle_update for cpu %u called\n", policy->cpu);
refresh_frequency_limits(policy);
}
static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
@ -1300,7 +1310,7 @@ static int cpufreq_online(unsigned int cpu)
policy->max = policy->user_policy.max;
}
if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
if (cpufreq_driver->get && has_target()) {
policy->cur = cpufreq_driver->get(policy->cpu);
if (!policy->cur) {
pr_err("%s: ->get() failed\n", __func__);
@ -1375,8 +1385,7 @@ static int cpufreq_online(unsigned int cpu)
if (cpufreq_driver->ready)
cpufreq_driver->ready(policy);
if (IS_ENABLED(CONFIG_CPU_THERMAL) &&
cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV)
if (cpufreq_thermal_control_enabled(cpufreq_driver))
policy->cdev = of_cpufreq_cooling_register(policy);
pr_debug("initialization complete\n");
@ -1466,8 +1475,7 @@ static int cpufreq_offline(unsigned int cpu)
goto unlock;
}
if (IS_ENABLED(CONFIG_CPU_THERMAL) &&
cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) {
if (cpufreq_thermal_control_enabled(cpufreq_driver)) {
cpufreq_cooling_unregister(policy->cdev);
policy->cdev = NULL;
}
@ -1546,6 +1554,30 @@ static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
cpufreq_freq_transition_end(policy, &freqs, 0);
}
static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, bool update)
{
unsigned int new_freq;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
/*
* If fast frequency switching is used with the given policy, the check
* against policy->cur is pointless, so skip it in that case.
*/
if (policy->fast_switch_enabled || !has_target())
return new_freq;
if (policy->cur != new_freq) {
cpufreq_out_of_sync(policy, new_freq);
if (update)
schedule_work(&policy->update);
}
return new_freq;
}
/**
* cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
* @cpu: CPU number
@ -1601,31 +1633,10 @@ EXPORT_SYMBOL(cpufreq_quick_get_max);
static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
{
unsigned int ret_freq = 0;
if (unlikely(policy_is_inactive(policy)))
return ret_freq;
return 0;
ret_freq = cpufreq_driver->get(policy->cpu);
/*
* If fast frequency switching is used with the given policy, the check
* against policy->cur is pointless, so skip it in that case too.
*/
if (policy->fast_switch_enabled)
return ret_freq;
if (ret_freq && policy->cur &&
!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
/* verify no discrepancy between actual and
saved value exists */
if (unlikely(ret_freq != policy->cur)) {
cpufreq_out_of_sync(policy, ret_freq);
schedule_work(&policy->update);
}
}
return ret_freq;
return cpufreq_verify_current_freq(policy, true);
}
/**
@ -1652,24 +1663,6 @@ unsigned int cpufreq_get(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_get);
static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
if (!policy->cur) {
pr_debug("cpufreq: Driver did not initialize current freq\n");
policy->cur = new_freq;
} else if (policy->cur != new_freq && has_target()) {
cpufreq_out_of_sync(policy, new_freq);
}
return new_freq;
}
static struct subsys_interface cpufreq_interface = {
.name = "cpufreq",
.subsys = &cpu_subsys,
@ -2150,8 +2143,8 @@ static int cpufreq_start_governor(struct cpufreq_policy *policy)
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
cpufreq_update_current_freq(policy);
if (cpufreq_driver->get)
cpufreq_verify_current_freq(policy, false);
if (policy->governor->start) {
ret = policy->governor->start(policy);
@ -2392,7 +2385,6 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
void cpufreq_update_policy(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
struct cpufreq_policy new_policy;
if (!policy)
return;
@ -2401,16 +2393,11 @@ void cpufreq_update_policy(unsigned int cpu)
* BIOS might change freq behind our back
* -> ask driver for current freq and notify governors about a change
*/
if (cpufreq_driver->get && !cpufreq_driver->setpolicy &&
(cpufreq_suspended || WARN_ON(!cpufreq_update_current_freq(policy))))
if (cpufreq_driver->get && has_target() &&
(cpufreq_suspended || WARN_ON(!cpufreq_verify_current_freq(policy, false))))
goto unlock;
pr_debug("updating policy for CPU %u\n", cpu);
memcpy(&new_policy, policy, sizeof(*policy));
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
cpufreq_set_policy(policy, &new_policy);
refresh_frequency_limits(policy);
unlock:
cpufreq_cpu_release(policy);

97
drivers/cpufreq/imx-cpufreq-dt.c Normal file
View File

@ -0,0 +1,97 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP
*/
#include <linux/cpu.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#define OCOTP_CFG3_SPEED_GRADE_SHIFT 8
#define OCOTP_CFG3_SPEED_GRADE_MASK (0x3 << 8)
#define OCOTP_CFG3_MKT_SEGMENT_SHIFT 6
#define OCOTP_CFG3_MKT_SEGMENT_MASK (0x3 << 6)
/* cpufreq-dt device registered by imx-cpufreq-dt */
static struct platform_device *cpufreq_dt_pdev;
static struct opp_table *cpufreq_opp_table;
static int imx_cpufreq_dt_probe(struct platform_device *pdev)
{
struct device *cpu_dev = get_cpu_device(0);
u32 cell_value, supported_hw[2];
int speed_grade, mkt_segment;
int ret;
ret = nvmem_cell_read_u32(cpu_dev, "speed_grade", &cell_value);
if (ret)
return ret;
speed_grade = (cell_value & OCOTP_CFG3_SPEED_GRADE_MASK) >> OCOTP_CFG3_SPEED_GRADE_SHIFT;
mkt_segment = (cell_value & OCOTP_CFG3_MKT_SEGMENT_MASK) >> OCOTP_CFG3_MKT_SEGMENT_SHIFT;
/*
* Early samples without fuses written report "0 0" which means
* consumer segment and minimum speed grading.
*
* According to datasheet minimum speed grading is not supported for
* consumer parts so clamp to 1 to avoid warning for "no OPPs"
*
* Applies to 8mq and 8mm.
*/
if (mkt_segment == 0 && speed_grade == 0 && (
of_machine_is_compatible("fsl,imx8mm") ||
of_machine_is_compatible("fsl,imx8mq")))
speed_grade = 1;
supported_hw[0] = BIT(speed_grade);
supported_hw[1] = BIT(mkt_segment);
dev_info(&pdev->dev, "cpu speed grade %d mkt segment %d supported-hw %#x %#x\n",
speed_grade, mkt_segment, supported_hw[0], supported_hw[1]);
cpufreq_opp_table = dev_pm_opp_set_supported_hw(cpu_dev, supported_hw, 2);
if (IS_ERR(cpufreq_opp_table)) {
ret = PTR_ERR(cpufreq_opp_table);
dev_err(&pdev->dev, "Failed to set supported opp: %d\n", ret);
return ret;
}
cpufreq_dt_pdev = platform_device_register_data(
&pdev->dev, "cpufreq-dt", -1, NULL, 0);
if (IS_ERR(cpufreq_dt_pdev)) {
dev_pm_opp_put_supported_hw(cpufreq_opp_table);
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(&pdev->dev, "Failed to register cpufreq-dt: %d\n", ret);
return ret;
}
return 0;
}
static int imx_cpufreq_dt_remove(struct platform_device *pdev)
{
platform_device_unregister(cpufreq_dt_pdev);
dev_pm_opp_put_supported_hw(cpufreq_opp_table);
return 0;
}
static struct platform_driver imx_cpufreq_dt_driver = {
.probe = imx_cpufreq_dt_probe,
.remove = imx_cpufreq_dt_remove,
.driver = {
.name = "imx-cpufreq-dt",
},
};
module_platform_driver(imx_cpufreq_dt_driver);
MODULE_ALIAS("platform:imx-cpufreq-dt");
MODULE_DESCRIPTION("Freescale i.MX cpufreq speed grading driver");
MODULE_LICENSE("GPL v2");

4
drivers/cpufreq/pcc-cpufreq.c
View File

@ -582,10 +582,10 @@ static int __init pcc_cpufreq_init(void)
/* Skip initialization if another cpufreq driver is there. */
if (cpufreq_get_current_driver())
return 0;
return -EEXIST;
if (acpi_disabled)
return 0;
return -ENODEV;
ret = pcc_cpufreq_probe();
if (ret) {

97
drivers/cpufreq/raspberrypi-cpufreq.c Normal file
View File

@ -0,0 +1,97 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Raspberry Pi cpufreq driver
*
* Copyright (C) 2019, Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
*/
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#define RASPBERRYPI_FREQ_INTERVAL 100000000
static struct platform_device *cpufreq_dt;
static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
{
struct device *cpu_dev;
unsigned long min, max;
unsigned long rate;
struct clk *clk;
int ret;
cpu_dev = get_cpu_device(0);
if (!cpu_dev) {
pr_err("Cannot get CPU for cpufreq driver\n");
return -ENODEV;
}
clk = clk_get(cpu_dev, NULL);
if (IS_ERR(clk)) {
dev_err(cpu_dev, "Cannot get clock for CPU0\n");
return PTR_ERR(clk);
}
/*
* The max and min frequencies are configurable in the Raspberry Pi
* firmware, so we query them at runtime.
*/
min = roundup(clk_round_rate(clk, 0), RASPBERRYPI_FREQ_INTERVAL);
max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL);
clk_put(clk);
for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) {
ret = dev_pm_opp_add(cpu_dev, rate, 0);
if (ret)
goto remove_opp;
}
cpufreq_dt = platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
ret = PTR_ERR_OR_ZERO(cpufreq_dt);
if (ret) {
dev_err(cpu_dev, "Failed to create platform device, %d\n", ret);
goto remove_opp;
}
return 0;
remove_opp:
dev_pm_opp_remove_all_dynamic(cpu_dev);
return ret;
}
static int raspberrypi_cpufreq_remove(struct platform_device *pdev)
{
struct device *cpu_dev;
cpu_dev = get_cpu_device(0);
if (cpu_dev)
dev_pm_opp_remove_all_dynamic(cpu_dev);
platform_device_unregister(cpufreq_dt);
return 0;
}
/*
* Since the driver depends on clk-raspberrypi, which may return EPROBE_DEFER,
* all the activity is performed in the probe, which may be defered as well.
*/
static struct platform_driver raspberrypi_cpufreq_driver = {
.driver = {
.name = "raspberrypi-cpufreq",
},
.probe = raspberrypi_cpufreq_probe,
.remove = raspberrypi_cpufreq_remove,
};
module_platform_driver(raspberrypi_cpufreq_driver);
MODULE_AUTHOR("Nicolas Saenz Julienne <nsaenzjulienne@suse.de");
MODULE_DESCRIPTION("Raspberry Pi cpufreq driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:raspberrypi-cpufreq");

2
drivers/cpufreq/s5pv210-cpufreq.c
View File

@ -478,7 +478,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
arm_volt, arm_volt_max);
}
printk(KERN_DEBUG "Perf changed[L%d]\n", index);
pr_debug("Perf changed[L%d]\n", index);
exit:
mutex_unlock(&set_freq_lock);

3
drivers/soc/imx/soc-imx8.c
View File

@ -103,6 +103,9 @@ static int __init imx8_soc_init(void)
if (IS_ERR(soc_dev))
goto free_rev;
if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
return 0;
free_rev:

6
include/linux/cpufreq.h
View File

@ -406,6 +406,12 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
const char *cpufreq_get_current_driver(void);
void *cpufreq_get_driver_data(void);
static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv)
{
return IS_ENABLED(CONFIG_CPU_THERMAL) &&
(drv->flags & CPUFREQ_IS_COOLING_DEV);
}
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
unsigned int min, unsigned int max)
{