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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-01-14 23:12:08 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-01-14 23:12:08 +0100
commit51c4c4ce1df49b14bbfc334c6388cc9efe32c631 (patch)
treeb33a9a905b9b646c78be7df7c189e7f9c0f28f77 /drivers/cpufreq
parent6cbd7ee10e2842a3d1f9b60abede1c8f3d1f1130 (diff)
parent22c73795b101597051924556dce019385a1e2fa0 (diff)
Merge back earlier 'pm-cpufreq' material.
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/Kconfig3
-rw-r--r--drivers/cpufreq/Kconfig.arm12
-rw-r--r--drivers/cpufreq/arm_big_little.c3
-rw-r--r--drivers/cpufreq/cpufreq-cpu0.c2
-rw-r--r--drivers/cpufreq/cpufreq.c69
-rw-r--r--drivers/cpufreq/cpufreq_governor.c6
-rw-r--r--drivers/cpufreq/cpufreq_governor.h2
-rw-r--r--drivers/cpufreq/davinci-cpufreq.c2
-rw-r--r--drivers/cpufreq/dbx500-cpufreq.c3
-rw-r--r--drivers/cpufreq/exynos-cpufreq.c15
-rw-r--r--drivers/cpufreq/exynos5250-cpufreq.c74
-rw-r--r--drivers/cpufreq/exynos5440-cpufreq.c3
-rw-r--r--drivers/cpufreq/freq_table.c22
-rw-r--r--drivers/cpufreq/imx6q-cpufreq.c128
-rw-r--r--drivers/cpufreq/integrator-cpufreq.c1
-rw-r--r--drivers/cpufreq/intel_pstate.c69
-rw-r--r--drivers/cpufreq/kirkwood-cpufreq.c1
-rw-r--r--drivers/cpufreq/omap-cpufreq.c2
-rw-r--r--drivers/cpufreq/pcc-cpufreq.c18
-rw-r--r--drivers/cpufreq/powernow-k6.c147
-rw-r--r--drivers/cpufreq/powernow-k8.c7
-rw-r--r--drivers/cpufreq/pxa2xx-cpufreq.c1
-rw-r--r--drivers/cpufreq/pxa3xx-cpufreq.c1
-rw-r--r--drivers/cpufreq/s3c2416-cpufreq.c2
-rw-r--r--drivers/cpufreq/s3c2440-cpufreq.c6
-rw-r--r--drivers/cpufreq/s3c24xx-cpufreq.c4
-rw-r--r--drivers/cpufreq/s3c64xx-cpufreq.c2
-rw-r--r--drivers/cpufreq/s5pv210-cpufreq.c2
-rw-r--r--drivers/cpufreq/sa1100-cpufreq.c2
-rw-r--r--drivers/cpufreq/sa1110-cpufreq.c2
-rw-r--r--drivers/cpufreq/spear-cpufreq.c4
-rw-r--r--drivers/cpufreq/tegra-cpufreq.c1
-rw-r--r--drivers/cpufreq/unicore2-cpufreq.c16
33 files changed, 426 insertions, 206 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 38093e272377..386dbc9ccdfd 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -181,7 +181,8 @@ config CPU_FREQ_GOV_CONSERVATIVE
config GENERIC_CPUFREQ_CPU0
tristate "Generic CPU0 cpufreq driver"
- depends on HAVE_CLK && REGULATOR && PM_OPP && OF
+ depends on HAVE_CLK && REGULATOR && OF
+ select PM_OPP
help
This adds a generic cpufreq driver for CPU0 frequency management.
It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index ce52ed949249..0468ad147301 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -4,7 +4,8 @@
config ARM_BIG_LITTLE_CPUFREQ
tristate "Generic ARM big LITTLE CPUfreq driver"
- depends on ARM_CPU_TOPOLOGY && PM_OPP && HAVE_CLK
+ depends on ARM && BIG_LITTLE && ARM_CPU_TOPOLOGY && HAVE_CLK
+ select PM_OPP
help
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
@@ -54,7 +55,8 @@ config ARM_EXYNOS5250_CPUFREQ
config ARM_EXYNOS5440_CPUFREQ
bool "SAMSUNG EXYNOS5440"
depends on SOC_EXYNOS5440
- depends on HAVE_CLK && PM_OPP && OF
+ depends on HAVE_CLK && OF
+ select PM_OPP
default y
help
This adds the CPUFreq driver for Samsung EXYNOS5440
@@ -79,11 +81,11 @@ config ARM_HIGHBANK_CPUFREQ
If in doubt, say N.
config ARM_IMX6Q_CPUFREQ
- tristate "Freescale i.MX6Q cpufreq support"
- depends on SOC_IMX6Q
+ tristate "Freescale i.MX6 cpufreq support"
+ depends on ARCH_MXC
depends on REGULATOR_ANATOP
help
- This adds cpufreq driver support for Freescale i.MX6Q SOC.
+ This adds cpufreq driver support for Freescale i.MX6 series SoCs.
If in doubt, say N.
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 5519933813ea..72f87e9317e3 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -488,7 +488,8 @@ static int bL_cpufreq_exit(struct cpufreq_policy *policy)
static struct cpufreq_driver bL_cpufreq_driver = {
.name = "arm-big-little",
.flags = CPUFREQ_STICKY |
- CPUFREQ_HAVE_GOVERNOR_PER_POLICY,
+ CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
+ CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = bL_cpufreq_set_target,
.get = bL_cpufreq_get_rate,
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index d4585ce2346c..0faf756f6197 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -44,7 +44,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
int ret;
freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
- if (freq_Hz < 0)
+ if (freq_Hz <= 0)
freq_Hz = freq_table[index].frequency * 1000;
freq_exact = freq_Hz;
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 8d19f7c06010..3509ca04b5bb 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -39,7 +39,7 @@ static struct cpufreq_driver *cpufreq_driver;
static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data_fallback);
static DEFINE_RWLOCK(cpufreq_driver_lock);
-static DEFINE_MUTEX(cpufreq_governor_lock);
+DEFINE_MUTEX(cpufreq_governor_lock);
static LIST_HEAD(cpufreq_policy_list);
#ifdef CONFIG_HOTPLUG_CPU
@@ -320,6 +320,20 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
+/* Do post notifications when there are chances that transition has failed */
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, int transition_failed)
+{
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+ if (!transition_failed)
+ return;
+
+ swap(freqs->old, freqs->new);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+}
+EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition);
+
/*********************************************************************
* SYSFS INTERFACE *
@@ -1059,6 +1073,46 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
}
}
+ /*
+ * Sometimes boot loaders set CPU frequency to a value outside of
+ * frequency table present with cpufreq core. In such cases CPU might be
+ * unstable if it has to run on that frequency for long duration of time
+ * and so its better to set it to a frequency which is specified in
+ * freq-table. This also makes cpufreq stats inconsistent as
+ * cpufreq-stats would fail to register because current frequency of CPU
+ * isn't found in freq-table.
+ *
+ * Because we don't want this change to effect boot process badly, we go
+ * for the next freq which is >= policy->cur ('cur' must be set by now,
+ * otherwise we will end up setting freq to lowest of the table as 'cur'
+ * is initialized to zero).
+ *
+ * We are passing target-freq as "policy->cur - 1" otherwise
+ * __cpufreq_driver_target() would simply fail, as policy->cur will be
+ * equal to target-freq.
+ */
+ if ((cpufreq_driver->flags & CPUFREQ_NEED_INITIAL_FREQ_CHECK)
+ && has_target()) {
+ /* Are we running at unknown frequency ? */
+ ret = cpufreq_frequency_table_get_index(policy, policy->cur);
+ if (ret == -EINVAL) {
+ /* Warn user and fix it */
+ pr_warn("%s: CPU%d: Running at unlisted freq: %u KHz\n",
+ __func__, policy->cpu, policy->cur);
+ ret = __cpufreq_driver_target(policy, policy->cur - 1,
+ CPUFREQ_RELATION_L);
+
+ /*
+ * Reaching here after boot in a few seconds may not
+ * mean that system will remain stable at "unknown"
+ * frequency for longer duration. Hence, a BUG_ON().
+ */
+ BUG_ON(ret);
+ pr_warn("%s: CPU%d: Unlisted initial frequency changed to: %u KHz\n",
+ __func__, policy->cpu, policy->cur);
+ }
+ }
+
/* related cpus should atleast have policy->cpus */
cpumask_or(policy->related_cpus, policy->related_cpus, policy->cpus);
@@ -1725,17 +1779,8 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
pr_err("%s: Failed to change cpu frequency: %d\n",
__func__, retval);
- if (notify) {
- /*
- * Notify with old freq in case we failed to change
- * frequency
- */
- if (retval)
- freqs.new = freqs.old;
-
- cpufreq_notify_transition(policy, &freqs,
- CPUFREQ_POSTCHANGE);
- }
+ if (notify)
+ cpufreq_notify_post_transition(policy, &freqs, retval);
}
out:
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index e6be63561fa6..ba43991ba98a 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -119,8 +119,9 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
{
int i;
+ mutex_lock(&cpufreq_governor_lock);
if (!policy->governor_enabled)
- return;
+ goto out_unlock;
if (!all_cpus) {
/*
@@ -135,6 +136,9 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
for_each_cpu(i, policy->cpus)
__gov_queue_work(i, dbs_data, delay);
}
+
+out_unlock:
+ mutex_unlock(&cpufreq_governor_lock);
}
EXPORT_SYMBOL_GPL(gov_queue_work);
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index b5f2b8618949..bfb9ae14142c 100644
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -257,6 +257,8 @@ static ssize_t show_sampling_rate_min_gov_pol \
return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \
}
+extern struct mutex cpufreq_governor_lock;
+
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
bool need_load_eval(struct cpu_dbs_common_info *cdbs,
unsigned int sampling_rate);
diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c
index 5e8a854381b7..04f3390a7a2c 100644
--- a/drivers/cpufreq/davinci-cpufreq.c
+++ b/drivers/cpufreq/davinci-cpufreq.c
@@ -126,7 +126,7 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver davinci_driver = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = davinci_verify_speed,
.target_index = davinci_target,
.get = davinci_getspeed,
diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c
index 0e67ab96321a..21d9898e000c 100644
--- a/drivers/cpufreq/dbx500-cpufreq.c
+++ b/drivers/cpufreq/dbx500-cpufreq.c
@@ -48,7 +48,8 @@ static int dbx500_cpufreq_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver dbx500_cpufreq_driver = {
- .flags = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS,
+ .flags = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS |
+ CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = dbx500_cpufreq_target,
.get = dbx500_cpufreq_getspeed,
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index f3c22874da75..f7c322c7d7ed 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -17,6 +17,7 @@
#include <linux/regulator/consumer.h>
#include <linux/cpufreq.h>
#include <linux/suspend.h>
+#include <linux/platform_device.h>
#include <plat/cpu.h>
@@ -218,7 +219,7 @@ static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver exynos_driver = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = exynos_target,
.get = exynos_getspeed,
@@ -232,7 +233,7 @@ static struct cpufreq_driver exynos_driver = {
#endif
};
-static int __init exynos_cpufreq_init(void)
+static int exynos_cpufreq_probe(struct platform_device *pdev)
{
int ret = -EINVAL;
@@ -281,4 +282,12 @@ err_vdd_arm:
kfree(exynos_info);
return -EINVAL;
}
-late_initcall(exynos_cpufreq_init);
+
+static struct platform_driver exynos_cpufreq_platdrv = {
+ .driver = {
+ .name = "exynos-cpufreq",
+ .owner = THIS_MODULE,
+ },
+ .probe = exynos_cpufreq_probe,
+};
+module_platform_driver(exynos_cpufreq_platdrv);
diff --git a/drivers/cpufreq/exynos5250-cpufreq.c b/drivers/cpufreq/exynos5250-cpufreq.c
index 8feda86fe42c..86fb1a105601 100644
--- a/drivers/cpufreq/exynos5250-cpufreq.c
+++ b/drivers/cpufreq/exynos5250-cpufreq.c
@@ -102,12 +102,12 @@ static void set_clkdiv(unsigned int div_index)
cpu_relax();
}
-static void set_apll(unsigned int new_index,
- unsigned int old_index)
+static void set_apll(unsigned int index)
{
- unsigned int tmp, pdiv;
+ unsigned int tmp;
+ unsigned int freq = apll_freq_5250[index].freq;
- /* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
+ /* MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
clk_set_parent(moutcore, mout_mpll);
do {
@@ -116,24 +116,9 @@ static void set_apll(unsigned int new_index,
tmp &= 0x7;
} while (tmp != 0x2);
- /* 2. Set APLL Lock time */
- pdiv = ((apll_freq_5250[new_index].mps >> 8) & 0x3f);
-
- __raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK);
+ clk_set_rate(mout_apll, freq * 1000);
- /* 3. Change PLL PMS values */
- tmp = __raw_readl(EXYNOS5_APLL_CON0);
- tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
- tmp |= apll_freq_5250[new_index].mps;
- __raw_writel(tmp, EXYNOS5_APLL_CON0);
-
- /* 4. wait_lock_time */
- do {
- cpu_relax();
- tmp = __raw_readl(EXYNOS5_APLL_CON0);
- } while (!(tmp & (0x1 << 29)));
-
- /* 5. MUX_CORE_SEL = APLL */
+ /* MUX_CORE_SEL = APLL */
clk_set_parent(moutcore, mout_apll);
do {
@@ -141,55 +126,17 @@ static void set_apll(unsigned int new_index,
tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU);
tmp &= (0x7 << 16);
} while (tmp != (0x1 << 16));
-
-}
-
-static bool exynos5250_pms_change(unsigned int old_index, unsigned int new_index)
-{
- unsigned int old_pm = apll_freq_5250[old_index].mps >> 8;
- unsigned int new_pm = apll_freq_5250[new_index].mps >> 8;
-
- return (old_pm == new_pm) ? 0 : 1;
}
static void exynos5250_set_frequency(unsigned int old_index,
unsigned int new_index)
{
- unsigned int tmp;
-
if (old_index > new_index) {
- if (!exynos5250_pms_change(old_index, new_index)) {
- /* 1. Change the system clock divider values */
- set_clkdiv(new_index);
- /* 2. Change just s value in apll m,p,s value */
- tmp = __raw_readl(EXYNOS5_APLL_CON0);
- tmp &= ~(0x7 << 0);
- tmp |= apll_freq_5250[new_index].mps & 0x7;
- __raw_writel(tmp, EXYNOS5_APLL_CON0);
-
- } else {
- /* Clock Configuration Procedure */
- /* 1. Change the system clock divider values */
- set_clkdiv(new_index);
- /* 2. Change the apll m,p,s value */
- set_apll(new_index, old_index);
- }
+ set_clkdiv(new_index);
+ set_apll(new_index);
} else if (old_index < new_index) {
- if (!exynos5250_pms_change(old_index, new_index)) {
- /* 1. Change just s value in apll m,p,s value */
- tmp = __raw_readl(EXYNOS5_APLL_CON0);
- tmp &= ~(0x7 << 0);
- tmp |= apll_freq_5250[new_index].mps & 0x7;
- __raw_writel(tmp, EXYNOS5_APLL_CON0);
- /* 2. Change the system clock divider values */
- set_clkdiv(new_index);
- } else {
- /* Clock Configuration Procedure */
- /* 1. Change the apll m,p,s value */
- set_apll(new_index, old_index);
- /* 2. Change the system clock divider values */
- set_clkdiv(new_index);
- }
+ set_apll(new_index);
+ set_clkdiv(new_index);
}
}
@@ -222,7 +169,6 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
info->volt_table = exynos5250_volt_table;
info->freq_table = exynos5250_freq_table;
info->set_freq = exynos5250_set_frequency;
- info->need_apll_change = exynos5250_pms_change;
return 0;
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c
index 76bef8b078cb..ffe6faea3a5f 100644
--- a/drivers/cpufreq/exynos5440-cpufreq.c
+++ b/drivers/cpufreq/exynos5440-cpufreq.c
@@ -312,7 +312,8 @@ static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver exynos_driver = {
- .flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION,
+ .flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION |
+ CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = exynos_target,
.get = exynos_getspeed,
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index 3458d27f63b4..a8ac0427fbfe 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -178,7 +178,29 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
+int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
+ unsigned int freq)
+{
+ struct cpufreq_frequency_table *table;
+ int i;
+
+ table = cpufreq_frequency_get_table(policy->cpu);
+ if (unlikely(!table)) {
+ pr_debug("%s: Unable to find frequency table\n", __func__);
+ return -ENOENT;
+ }
+
+ for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
+ if (table[i].frequency == freq)
+ return i;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
+
static DEFINE_PER_CPU(struct cpufreq_frequency_table *, cpufreq_show_table);
+
/**
* show_available_freqs - show available frequencies for the specified CPU
*/
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 4b3f18e5f36b..2938257b8c19 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -35,6 +35,9 @@ static struct device *cpu_dev;
static struct cpufreq_frequency_table *freq_table;
static unsigned int transition_latency;
+static u32 *imx6_soc_volt;
+static u32 soc_opp_count;
+
static unsigned int imx6q_get_speed(unsigned int cpu)
{
return clk_get_rate(arm_clk) / 1000;
@@ -69,23 +72,22 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
/* scaling up? scale voltage before frequency */
if (new_freq > old_freq) {
+ ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
+ if (ret) {
+ dev_err(cpu_dev, "failed to scale vddpu up: %d\n", ret);
+ return ret;
+ }
+ ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
+ if (ret) {
+ dev_err(cpu_dev, "failed to scale vddsoc up: %d\n", ret);
+ return ret;
+ }
ret = regulator_set_voltage_tol(arm_reg, volt, 0);
if (ret) {
dev_err(cpu_dev,
"failed to scale vddarm up: %d\n", ret);
return ret;
}
-
- /*
- * Need to increase vddpu and vddsoc for safety
- * if we are about to run at 1.2 GHz.
- */
- if (new_freq == FREQ_1P2_GHZ / 1000) {
- regulator_set_voltage_tol(pu_reg,
- PU_SOC_VOLTAGE_HIGH, 0);
- regulator_set_voltage_tol(soc_reg,
- PU_SOC_VOLTAGE_HIGH, 0);
- }
}
/*
@@ -120,12 +122,15 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
"failed to scale vddarm down: %d\n", ret);
ret = 0;
}
-
- if (old_freq == FREQ_1P2_GHZ / 1000) {
- regulator_set_voltage_tol(pu_reg,
- PU_SOC_VOLTAGE_NORMAL, 0);
- regulator_set_voltage_tol(soc_reg,
- PU_SOC_VOLTAGE_NORMAL, 0);
+ ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
+ if (ret) {
+ dev_warn(cpu_dev, "failed to scale vddsoc down: %d\n", ret);
+ ret = 0;
+ }
+ ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
+ if (ret) {
+ dev_warn(cpu_dev, "failed to scale vddpu down: %d\n", ret);
+ ret = 0;
}
}
@@ -138,6 +143,7 @@ static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver imx6q_cpufreq_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = imx6q_set_target,
.get = imx6q_get_speed,
@@ -153,6 +159,9 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
struct dev_pm_opp *opp;
unsigned long min_volt, max_volt;
int num, ret;
+ const struct property *prop;
+ const __be32 *val;
+ u32 nr, i, j;
cpu_dev = get_cpu_device(0);
if (!cpu_dev) {
@@ -187,12 +196,25 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
goto put_node;
}
- /* We expect an OPP table supplied by platform */
+ /*
+ * We expect an OPP table supplied by platform.
+ * Just, incase the platform did not supply the OPP
+ * table, it will try to get it.
+ */
num = dev_pm_opp_get_opp_count(cpu_dev);
if (num < 0) {
- ret = num;
- dev_err(cpu_dev, "no OPP table is found: %d\n", ret);
- goto put_node;
+ ret = of_init_opp_table(cpu_dev);
+ if (ret < 0) {
+ dev_err(cpu_dev, "failed to init OPP table: %d\n", ret);
+ goto put_node;
+ }
+
+ num = dev_pm_opp_get_opp_count(cpu_dev);
+ if (num < 0) {
+ ret = num;
+ dev_err(cpu_dev, "no OPP table is found: %d\n", ret);
+ goto put_node;
+ }
}
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
@@ -201,10 +223,62 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
goto put_node;
}
+ /* Make imx6_soc_volt array's size same as arm opp number */
+ imx6_soc_volt = devm_kzalloc(cpu_dev, sizeof(*imx6_soc_volt) * num, GFP_KERNEL);
+ if (imx6_soc_volt == NULL) {
+ ret = -ENOMEM;
+ goto free_freq_table;
+ }
+
+ prop = of_find_property(np, "fsl,soc-operating-points", NULL);
+ if (!prop || !prop->value)
+ goto soc_opp_out;
+
+ /*
+ * Each OPP is a set of tuples consisting of frequency and
+ * voltage like <freq-kHz vol-uV>.
+ */
+ nr = prop->length / sizeof(u32);
+ if (nr % 2 || (nr / 2) < num)
+ goto soc_opp_out;
+
+ for (j = 0; j < num; j++) {
+ val = prop->value;
+ for (i = 0; i < nr / 2; i++) {
+ unsigned long freq = be32_to_cpup(val++);
+ unsigned long volt = be32_to_cpup(val++);
+ if (freq_table[j].frequency == freq) {
+ imx6_soc_volt[soc_opp_count++] = volt;
+ break;
+ }
+ }
+ }
+
+soc_opp_out:
+ /* use fixed soc opp volt if no valid soc opp info found in dtb */
+ if (soc_opp_count != num) {
+ dev_warn(cpu_dev, "can NOT find valid fsl,soc-operating-points property in dtb, use default value!\n");
+ for (j = 0; j < num; j++)
+ imx6_soc_volt[j] = PU_SOC_VOLTAGE_NORMAL;
+ if (freq_table[num - 1].frequency * 1000 == FREQ_1P2_GHZ)
+ imx6_soc_volt[num - 1] = PU_SOC_VOLTAGE_HIGH;
+ }
+
if (of_property_read_u32(np, "clock-latency", &transition_latency))
transition_latency = CPUFREQ_ETERNAL;
/*
+ * Calculate the ramp time for max voltage change in the
+ * VDDSOC and VDDPU regulators.
+ */
+ ret = regulator_set_voltage_time(soc_reg, imx6_soc_volt[0], imx6_soc_volt[num - 1]);
+ if (ret > 0)
+ transition_latency += ret * 1000;
+ ret = regulator_set_voltage_time(pu_reg, imx6_soc_volt[0], imx6_soc_volt[num - 1]);
+ if (ret > 0)
+ transition_latency += ret * 1000;
+
+ /*
* OPP is maintained in order of increasing frequency, and
* freq_table initialised from OPP is therefore sorted in the
* same order.
@@ -221,18 +295,6 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
if (ret > 0)
transition_latency += ret * 1000;
- /* Count vddpu and vddsoc latency in for 1.2 GHz support */
- if (freq_table[num].frequency == FREQ_1P2_GHZ / 1000) {
- ret = regulator_set_voltage_time(pu_reg, PU_SOC_VOLTAGE_NORMAL,
- PU_SOC_VOLTAGE_HIGH);
- if (ret > 0)
- transition_latency += ret * 1000;
- ret = regulator_set_voltage_time(soc_reg, PU_SOC_VOLTAGE_NORMAL,
- PU_SOC_VOLTAGE_HIGH);
- if (ret > 0)
- transition_latency += ret * 1000;
- }
-
ret = cpufreq_register_driver(&imx6q_cpufreq_driver);
if (ret) {
dev_err(cpu_dev, "failed register driver: %d\n", ret);
diff --git a/drivers/cpufreq/integrator-cpufreq.c b/drivers/cpufreq/integrator-cpufreq.c
index 7d8ab000d317..0e27844e8c2d 100644
--- a/drivers/cpufreq/integrator-cpufreq.c
+++ b/drivers/cpufreq/integrator-cpufreq.c
@@ -190,6 +190,7 @@ static int integrator_cpufreq_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver integrator_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = integrator_verify_policy,
.target = integrator_set_target,
.get = integrator_get,
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index d51f17ed691e..fe91dad8f5e2 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -35,6 +35,7 @@
#define SAMPLE_COUNT 3
#define BYT_RATIOS 0x66a
+#define BYT_VIDS 0x66b
#define FRAC_BITS 8
#define int_tofp(X) ((int64_t)(X) << FRAC_BITS)
@@ -64,6 +65,12 @@ struct pstate_data {
int turbo_pstate;
};
+struct vid_data {
+ int32_t min;
+ int32_t max;
+ int32_t ratio;
+};
+
struct _pid {
int setpoint;
int32_t integral;
@@ -82,10 +89,9 @@ struct cpudata {
struct timer_list timer;
struct pstate_data pstate;
+ struct vid_data vid;
struct _pid pid;
- int min_pstate_count;
-
u64 prev_aperf;
u64 prev_mperf;
int sample_ptr;
@@ -106,7 +112,8 @@ struct pstate_funcs {
int (*get_max)(void);
int (*get_min)(void);
int (*get_turbo)(void);
- void (*set)(int pstate);
+ void (*set)(struct cpudata*, int pstate);
+ void (*get_vid)(struct cpudata *);
};
struct cpu_defaults {
@@ -358,6 +365,42 @@ static int byt_get_max_pstate(void)
return (value >> 16) & 0xFF;
}
+static void byt_set_pstate(struct cpudata *cpudata, int pstate)
+{
+ u64 val;
+ int32_t vid_fp;
+ u32 vid;
+
+ val = pstate << 8;
+ if (limits.no_turbo)
+ val |= (u64)1 << 32;
+
+ vid_fp = cpudata->vid.min + mul_fp(
+ int_tofp(pstate - cpudata->pstate.min_pstate),
+ cpudata->vid.ratio);
+
+ vid_fp = clamp_t(int32_t, vid_fp, cpudata->vid.min, cpudata->vid.max);
+ vid = fp_toint(vid_fp);
+
+ val |= vid;
+
+ wrmsrl(MSR_IA32_PERF_CTL, val);
+}
+
+static void byt_get_vid(struct cpudata *cpudata)
+{
+ u64 value;
+
+ rdmsrl(BYT_VIDS, value);
+ cpudata->vid.min = int_tofp((value >> 8) & 0x7f);
+ cpudata->vid.max = int_tofp((value >> 16) & 0x7f);
+ cpudata->vid.ratio = div_fp(
+ cpudata->vid.max - cpudata->vid.min,
+ int_tofp(cpudata->pstate.max_pstate -
+ cpudata->pstate.min_pstate));
+}
+
+
static int core_get_min_pstate(void)
{
u64 value;
@@ -384,7 +427,7 @@ static int core_get_turbo_pstate(void)
return ret;
}
-static void core_set_pstate(int pstate)
+static void core_set_pstate(struct cpudata *cpudata, int pstate)
{
u64 val;
@@ -425,7 +468,8 @@ static struct cpu_defaults byt_params = {
.get_max = byt_get_max_pstate,
.get_min = byt_get_min_pstate,
.get_turbo = byt_get_max_pstate,
- .set = core_set_pstate,
+ .set = byt_set_pstate,
+ .get_vid = byt_get_vid,
},
};
@@ -462,7 +506,7 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
cpu->pstate.current_pstate = pstate;
- pstate_funcs.set(pstate);
+ pstate_funcs.set(cpu, pstate);
}
static inline void intel_pstate_pstate_increase(struct cpudata *cpu, int steps)
@@ -488,6 +532,9 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
cpu->pstate.max_pstate = pstate_funcs.get_max();
cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
+ if (pstate_funcs.get_vid)
+ pstate_funcs.get_vid(cpu);
+
/*
* goto max pstate so we don't slow up boot if we are built-in if we are
* a module we will take care of it during normal operation
@@ -568,15 +615,6 @@ static void intel_pstate_timer_func(unsigned long __data)
intel_pstate_sample(cpu);
intel_pstate_adjust_busy_pstate(cpu);
-
- if (cpu->pstate.current_pstate == cpu->pstate.min_pstate) {
- cpu->min_pstate_count++;
- if (!(cpu->min_pstate_count % 5)) {
- intel_pstate_set_pstate(cpu, cpu->pstate.max_pstate);
- }
- } else
- cpu->min_pstate_count = 0;
-
intel_pstate_set_sample_time(cpu);
}
@@ -782,6 +820,7 @@ static void copy_cpu_funcs(struct pstate_funcs *funcs)
pstate_funcs.get_min = funcs->get_min;
pstate_funcs.get_turbo = funcs->get_turbo;
pstate_funcs.set = funcs->set;
+ pstate_funcs.get_vid = funcs->get_vid;
}
#if IS_ENABLED(CONFIG_ACPI)
diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c
index 0767a4e29dfe..eb7abe345b50 100644
--- a/drivers/cpufreq/kirkwood-cpufreq.c
+++ b/drivers/cpufreq/kirkwood-cpufreq.c
@@ -97,6 +97,7 @@ static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver kirkwood_cpufreq_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.get = kirkwood_cpufreq_get_cpu_frequency,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = kirkwood_cpufreq_target,
diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
index a0acd0bfba40..5de1e5f73eca 100644
--- a/drivers/cpufreq/omap-cpufreq.c
+++ b/drivers/cpufreq/omap-cpufreq.c
@@ -162,7 +162,7 @@ static int omap_cpu_exit(struct cpufreq_policy *policy)
}
static struct cpufreq_driver omap_driver = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = omap_target,
.get = omap_getspeed,
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c
index e2b4f40ff69a..1c0f1067af73 100644
--- a/drivers/cpufreq/pcc-cpufreq.c
+++ b/drivers/cpufreq/pcc-cpufreq.c
@@ -213,6 +213,7 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
cpu, target_freq,
(pcch_virt_addr + pcc_cpu_data->input_offset));
+ freqs.old = policy->cur;
freqs.new = target_freq;
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
@@ -228,25 +229,20 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
memset_io((pcch_virt_addr + pcc_cpu_data->input_offset), 0, BUF_SZ);
status = ioread16(&pcch_hdr->status);
+ iowrite16(0, &pcch_hdr->status);
+
+ cpufreq_notify_post_transition(policy, &freqs, status != CMD_COMPLETE);
+ spin_unlock(&pcc_lock);
+
if (status != CMD_COMPLETE) {
pr_debug("target: FAILED for cpu %d, with status: 0x%x\n",
cpu, status);
- goto cmd_incomplete;
+ return -EINVAL;
}
- iowrite16(0, &pcch_hdr->status);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
pr_debug("target: was SUCCESSFUL for cpu %d\n", cpu);
- spin_unlock(&pcc_lock);
return 0;
-
-cmd_incomplete:
- freqs.new = freqs.old;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- iowrite16(0, &pcch_hdr->status);
- spin_unlock(&pcc_lock);
- return -EINVAL;
}
static int pcc_get_offset(int cpu)
diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c
index 643e7952cad3..b9a444e358b5 100644
--- a/drivers/cpufreq/powernow-k6.c
+++ b/drivers/cpufreq/powernow-k6.c
@@ -26,41 +26,108 @@
static unsigned int busfreq; /* FSB, in 10 kHz */
static unsigned int max_multiplier;
+static unsigned int param_busfreq = 0;
+static unsigned int param_max_multiplier = 0;
+
+module_param_named(max_multiplier, param_max_multiplier, uint, S_IRUGO);
+MODULE_PARM_DESC(max_multiplier, "Maximum multiplier (allowed values: 20 30 35 40 45 50 55 60)");
+
+module_param_named(bus_frequency, param_busfreq, uint, S_IRUGO);
+MODULE_PARM_DESC(bus_frequency, "Bus frequency in kHz");
/* Clock ratio multiplied by 10 - see table 27 in AMD#23446 */
static struct cpufreq_frequency_table clock_ratio[] = {
- {45, /* 000 -> 4.5x */ 0},
+ {60, /* 110 -> 6.0x */ 0},
+ {55, /* 011 -> 5.5x */ 0},
{50, /* 001 -> 5.0x */ 0},
+ {45, /* 000 -> 4.5x */ 0},
{40, /* 010 -> 4.0x */ 0},
- {55, /* 011 -> 5.5x */ 0},
- {20, /* 100 -> 2.0x */ 0},
- {30, /* 101 -> 3.0x */ 0},
- {60, /* 110 -> 6.0x */ 0},
{35, /* 111 -> 3.5x */ 0},
+ {30, /* 101 -> 3.0x */ 0},
+ {20, /* 100 -> 2.0x */ 0},
{0, CPUFREQ_TABLE_END}
};
+static const u8 index_to_register[8] = { 6, 3, 1, 0, 2, 7, 5, 4 };
+static const u8 register_to_index[8] = { 3, 2, 4, 1, 7, 6, 0, 5 };
+
+static const struct {
+ unsigned freq;
+ unsigned mult;
+} usual_frequency_table[] = {
+ { 400000, 40 }, // 100 * 4
+ { 450000, 45 }, // 100 * 4.5
+ { 475000, 50 }, // 95 * 5
+ { 500000, 50 }, // 100 * 5
+ { 506250, 45 }, // 112.5 * 4.5
+ { 533500, 55 }, // 97 * 5.5
+ { 550000, 55 }, // 100 * 5.5
+ { 562500, 50 }, // 112.5 * 5
+ { 570000, 60 }, // 95 * 6
+ { 600000, 60 }, // 100 * 6
+ { 618750, 55 }, // 112.5 * 5.5
+ { 660000, 55 }, // 120 * 5.5
+ { 675000, 60 }, // 112.5 * 6
+ { 720000, 60 }, // 120 * 6
+};
+
+#define FREQ_RANGE 3000
/**
* powernow_k6_get_cpu_multiplier - returns the current FSB multiplier
*
- * Returns the current setting of the frequency multiplier. Core clock
+ * Returns the current setting of the frequency multiplier. Core clock
* speed is frequency of the Front-Side Bus multiplied with this value.
*/
static int powernow_k6_get_cpu_multiplier(void)
{
- u64 invalue = 0;
+ unsigned long invalue = 0;
u32 msrval;
+ local_irq_disable();
+
msrval = POWERNOW_IOPORT + 0x1;
wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
invalue = inl(POWERNOW_IOPORT + 0x8);
msrval = POWERNOW_IOPORT + 0x0;
wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
- return clock_ratio[(invalue >> 5)&7].driver_data;
+ local_irq_enable();
+
+ return clock_ratio[register_to_index[(invalue >> 5)&7]].driver_data;
}
+static void powernow_k6_set_cpu_multiplier(unsigned int best_i)
+{
+ unsigned long outvalue, invalue;
+ unsigned long msrval;
+ unsigned long cr0;
+
+ /* we now need to transform best_i to the BVC format, see AMD#23446 */
+
+ /*
+ * The processor doesn't respond to inquiry cycles while changing the
+ * frequency, so we must disable cache.
+ */
+ local_irq_disable();
+ cr0 = read_cr0();
+ write_cr0(cr0 | X86_CR0_CD);
+ wbinvd();
+
+ outvalue = (1<<12) | (1<<10) | (1<<9) | (index_to_register[best_i]<<5);
+
+ msrval = POWERNOW_IOPORT + 0x1;
+ wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
+ invalue = inl(POWERNOW_IOPORT + 0x8);
+ invalue = invalue & 0x1f;
+ outvalue = outvalue | invalue;
+ outl(outvalue, (POWERNOW_IOPORT + 0x8));
+ msrval = POWERNOW_IOPORT + 0x0;
+ wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
+
+ write_cr0(cr0);
+ local_irq_enable();
+}
/**
* powernow_k6_target - set the PowerNow! multiplier
@@ -71,8 +138,6 @@ static int powernow_k6_get_cpu_multiplier(void)
static int powernow_k6_target(struct cpufreq_policy *policy,
unsigned int best_i)
{
- unsigned long outvalue = 0, invalue = 0;
- unsigned long msrval;
struct cpufreq_freqs freqs;
if (clock_ratio[best_i].driver_data > max_multiplier) {
@@ -85,35 +150,63 @@ static int powernow_k6_target(struct cpufreq_policy *policy,
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- /* we now need to transform best_i to the BVC format, see AMD#23446 */
-
- outvalue = (1<<12) | (1<<10) | (1<<9) | (best_i<<5);
-
- msrval = POWERNOW_IOPORT + 0x1;
- wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
- invalue = inl(POWERNOW_IOPORT + 0x8);
- invalue = invalue & 0xf;
- outvalue = outvalue | invalue;
- outl(outvalue , (POWERNOW_IOPORT + 0x8));
- msrval = POWERNOW_IOPORT + 0x0;
- wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
+ powernow_k6_set_cpu_multiplier(best_i);
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return 0;
}
-
static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
{
unsigned int i, f;
+ unsigned khz;
if (policy->cpu != 0)
return -ENODEV;
- /* get frequencies */
- max_multiplier = powernow_k6_get_cpu_multiplier();
- busfreq = cpu_khz / max_multiplier;
+ max_multiplier = 0;
+ khz = cpu_khz;
+ for (i = 0; i < ARRAY_SIZE(usual_frequency_table); i++) {
+ if (khz >= usual_frequency_table[i].freq - FREQ_RANGE &&
+ khz <= usual_frequency_table[i].freq + FREQ_RANGE) {
+ khz = usual_frequency_table[i].freq;
+ max_multiplier = usual_frequency_table[i].mult;
+ break;
+ }
+ }
+ if (param_max_multiplier) {
+ for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
+ if (clock_ratio[i].driver_data == param_max_multiplier) {
+ max_multiplier = param_max_multiplier;
+ goto have_max_multiplier;
+ }
+ }
+ printk(KERN_ERR "powernow-k6: invalid max_multiplier parameter, valid parameters 20, 30, 35, 40, 45, 50, 55, 60\n");
+ return -EINVAL;
+ }
+
+ if (!max_multiplier) {
+ printk(KERN_WARNING "powernow-k6: unknown frequency %u, cannot determine current multiplier\n", khz);
+ printk(KERN_WARNING "powernow-k6: use module parameters max_multiplier and bus_frequency\n");
+ return -EOPNOTSUPP;
+ }
+
+have_max_multiplier:
+ param_max_multiplier = max_multiplier;
+
+ if (param_busfreq) {
+ if (param_busfreq >= 50000 && param_busfreq <= 150000) {
+ busfreq = param_busfreq / 10;
+ goto have_busfreq;
+ }
+ printk(KERN_ERR "powernow-k6: invalid bus_frequency parameter, allowed range 50000 - 150000 kHz\n");
+ return -EINVAL;
+ }
+
+ busfreq = khz / max_multiplier;
+have_busfreq:
+ param_busfreq = busfreq * 10;
/* table init */
for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
@@ -125,7 +218,7 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
}
/* cpuinfo and default policy values */
- policy->cpuinfo.transition_latency = 200000;
+ policy->cpuinfo.transition_latency = 500000;
return cpufreq_table_validate_and_show(policy, clock_ratio);
}
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 0023c7d40a51..e10b646634d7 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -964,14 +964,9 @@ static int transition_frequency_fidvid(struct powernow_k8_data *data,
cpufreq_cpu_put(policy);
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
res = transition_fid_vid(data, fid, vid);
- if (res)
- freqs.new = freqs.old;
- else
- freqs.new = find_khz_freq_from_fid(data->currfid);
+ cpufreq_notify_post_transition(policy, &freqs, res);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return res;
}
diff --git a/drivers/cpufreq/pxa2xx-cpufreq.c b/drivers/cpufreq/pxa2xx-cpufreq.c
index 0a0f4369636a..a9195a86b069 100644
--- a/drivers/cpufreq/pxa2xx-cpufreq.c
+++ b/drivers/cpufreq/pxa2xx-cpufreq.c
@@ -423,6 +423,7 @@ static int pxa_cpufreq_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver pxa_cpufreq_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = pxa_set_target,
.init = pxa_cpufreq_init,
diff --git a/drivers/cpufreq/pxa3xx-cpufreq.c b/drivers/cpufreq/pxa3xx-cpufreq.c
index 93840048dd11..3785687e9d70 100644
--- a/drivers/cpufreq/pxa3xx-cpufreq.c
+++ b/drivers/cpufreq/pxa3xx-cpufreq.c
@@ -201,6 +201,7 @@ static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver pxa3xx_cpufreq_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = pxa3xx_cpufreq_set,
.init = pxa3xx_cpufreq_init,
diff --git a/drivers/cpufreq/s3c2416-cpufreq.c b/drivers/cpufreq/s3c2416-cpufreq.c
index 8d904a00027b..826b8be23099 100644
--- a/drivers/cpufreq/s3c2416-cpufreq.c
+++ b/drivers/cpufreq/s3c2416-cpufreq.c
@@ -481,7 +481,7 @@ err_hclk:
}
static struct cpufreq_driver s3c2416_cpufreq_driver = {
- .flags = 0,
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = s3c2416_cpufreq_set_target,
.get = s3c2416_cpufreq_get_speed,
diff --git a/drivers/cpufreq/s3c2440-cpufreq.c b/drivers/cpufreq/s3c2440-cpufreq.c
index 72b2cc8a5a85..f84ed10755b5 100644
--- a/drivers/cpufreq/s3c2440-cpufreq.c
+++ b/drivers/cpufreq/s3c2440-cpufreq.c
@@ -22,8 +22,6 @@
#include <linux/err.h>
#include <linux/io.h>
-#include <mach/hardware.h>
-
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -55,7 +53,7 @@ static inline int within_khz(unsigned long a, unsigned long b)
* specified in @cfg. The values are stored in @cfg for later use
* by the relevant set routine if the request settings can be reached.
*/
-int s3c2440_cpufreq_calcdivs(struct s3c_cpufreq_config *cfg)
+static int s3c2440_cpufreq_calcdivs(struct s3c_cpufreq_config *cfg)
{
unsigned int hdiv, pdiv;
unsigned long hclk, fclk, armclk;
@@ -242,7 +240,7 @@ static int s3c2440_cpufreq_calctable(struct s3c_cpufreq_config *cfg,
return ret;
}
-struct s3c_cpufreq_info s3c2440_cpufreq_info = {
+static struct s3c_cpufreq_info s3c2440_cpufreq_info = {
.max = {
.fclk = 400000000,
.hclk = 133333333,
diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c
index 485088253358..6a1bf96deec0 100644
--- a/drivers/cpufreq/s3c24xx-cpufreq.c
+++ b/drivers/cpufreq/s3c24xx-cpufreq.c
@@ -448,7 +448,7 @@ static int s3c_cpufreq_resume(struct cpufreq_policy *policy)
#endif
static struct cpufreq_driver s3c24xx_driver = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.target = s3c_cpufreq_target,
.get = s3c_cpufreq_get,
.init = s3c_cpufreq_init,
@@ -509,7 +509,7 @@ int __init s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
return 0;
}
-int __init s3c_cpufreq_auto_io(void)
+static int __init s3c_cpufreq_auto_io(void)
{
int ret;
diff --git a/drivers/cpufreq/s3c64xx-cpufreq.c b/drivers/cpufreq/s3c64xx-cpufreq.c
index 67e302eeefec..8435f45d7e9d 100644
--- a/drivers/cpufreq/s3c64xx-cpufreq.c
+++ b/drivers/cpufreq/s3c64xx-cpufreq.c
@@ -226,7 +226,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver s3c64xx_cpufreq_driver = {
- .flags = 0,
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = s3c64xx_cpufreq_set_target,
.get = s3c64xx_cpufreq_get_speed,
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index e3973dae28a7..ccd548c6f0c1 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -560,7 +560,7 @@ static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
}
static struct cpufreq_driver s5pv210_driver = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = s5pv210_target,
.get = s5pv210_getspeed,
diff --git a/drivers/cpufreq/sa1100-cpufreq.c b/drivers/cpufreq/sa1100-cpufreq.c
index 623da742f8e7..728eab77e8e0 100644
--- a/drivers/cpufreq/sa1100-cpufreq.c
+++ b/drivers/cpufreq/sa1100-cpufreq.c
@@ -201,7 +201,7 @@ static int __init sa1100_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver sa1100_driver __refdata = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = sa1100_target,
.get = sa11x0_getspeed,
diff --git a/drivers/cpufreq/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c
index 2c2b2e601d13..546376719d8f 100644
--- a/drivers/cpufreq/sa1110-cpufreq.c
+++ b/drivers/cpufreq/sa1110-cpufreq.c
@@ -312,7 +312,7 @@ static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
/* sa1110_driver needs __refdata because it must remain after init registers
* it with cpufreq_register_driver() */
static struct cpufreq_driver sa1110_driver __refdata = {
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = sa1110_target,
.get = sa11x0_getspeed,
diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index d02ccd19c9c4..c7525fe33407 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -138,7 +138,7 @@ static int spear_cpufreq_target(struct cpufreq_policy *policy,
}
newfreq = clk_round_rate(srcclk, newfreq * mult);
- if (newfreq < 0) {
+ if (newfreq <= 0) {
pr_err("clk_round_rate failed for cpu src clock\n");
return newfreq;
}
@@ -162,7 +162,7 @@ static int spear_cpufreq_init(struct cpufreq_policy *policy)
static struct cpufreq_driver spear_cpufreq_driver = {
.name = "cpufreq-spear",
- .flags = CPUFREQ_STICKY,
+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = spear_cpufreq_target,
.get = spear_cpufreq_get,
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index b7309c37033d..01b5578ffecf 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -214,6 +214,7 @@ static int tegra_cpu_exit(struct cpufreq_policy *policy)
}
static struct cpufreq_driver tegra_cpufreq_driver = {
+ .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = tegra_target,
.get = tegra_getspeed,
diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c
index 653ae2955b55..86f6cfec2e09 100644
--- a/drivers/cpufreq/unicore2-cpufreq.c
+++ b/drivers/cpufreq/unicore2-cpufreq.c
@@ -46,20 +46,18 @@ static int ucv2_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
- unsigned int cur = ucv2_getspeed(0);
struct cpufreq_freqs freqs;
struct clk *mclk = clk_get(NULL, "MAIN_CLK");
+ int ret;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- if (!clk_set_rate(mclk, target_freq * 1000)) {
- freqs.old = cur;
- freqs.new = target_freq;
- }
+ freqs.old = policy->cur;
+ freqs.new = target_freq;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+ ret = clk_set_rate(mclk, target_freq * 1000);
+ cpufreq_notify_post_transition(policy, &freqs, ret);
- return 0;
+ return ret;
}
static int __init ucv2_cpu_init(struct cpufreq_policy *policy)