This patch moves cpufreq driver of SUPERH architecture to drivers/cpufreq.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
endmenu
menu "CPU Frequency scaling"
-
source "drivers/cpufreq/Kconfig"
-
-config SH_CPU_FREQ
- tristate "SuperH CPU Frequency driver"
- depends on CPU_FREQ
- select CPU_FREQ_TABLE
- help
- This adds the cpufreq driver for SuperH. Any CPU that supports
- clock rate rounding through the clock framework can use this
- driver. While it will make the kernel slightly larger, this is
- harmless for CPUs that don't support rate rounding. The driver
- will also generate a notice in the boot log before disabling
- itself if the CPU in question is not capable of rate rounding.
-
- For details, take a look at <file:Documentation/cpu-freq>.
-
- If unsure, say N.
-
endmenu
source "arch/sh/drivers/Kconfig"
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_SH_STANDARD_BIOS) += sh_bios.o
obj-$(CONFIG_KGDB) += kgdb.o
-obj-$(CONFIG_SH_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_MODULES) += sh_ksyms_$(BITS).o module.o
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
+++ /dev/null
-/*
- * arch/sh/kernel/cpufreq.c
- *
- * cpufreq driver for the SuperH processors.
- *
- * Copyright (C) 2002 - 2012 Paul Mundt
- * Copyright (C) 2002 M. R. Brown
- *
- * Clock framework bits from arch/avr32/mach-at32ap/cpufreq.c
- *
- * Copyright (C) 2004-2007 Atmel Corporation
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#define pr_fmt(fmt) "cpufreq: " fmt
-
-#include <linux/types.h>
-#include <linux/cpufreq.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/cpumask.h>
-#include <linux/cpu.h>
-#include <linux/smp.h>
-#include <linux/sched.h> /* set_cpus_allowed() */
-#include <linux/clk.h>
-#include <linux/percpu.h>
-#include <linux/sh_clk.h>
-
-static DEFINE_PER_CPU(struct clk, sh_cpuclk);
-
-static unsigned int sh_cpufreq_get(unsigned int cpu)
-{
- return (clk_get_rate(&per_cpu(sh_cpuclk, cpu)) + 500) / 1000;
-}
-
-/*
- * Here we notify other drivers of the proposed change and the final change.
- */
-static int sh_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int cpu = policy->cpu;
- struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
- cpumask_t cpus_allowed;
- struct cpufreq_freqs freqs;
- struct device *dev;
- long freq;
-
- cpus_allowed = current->cpus_allowed;
- set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
- BUG_ON(smp_processor_id() != cpu);
-
- dev = get_cpu_device(cpu);
-
- /* Convert target_freq from kHz to Hz */
- freq = clk_round_rate(cpuclk, target_freq * 1000);
-
- if (freq < (policy->min * 1000) || freq > (policy->max * 1000))
- return -EINVAL;
-
- dev_dbg(dev, "requested frequency %u Hz\n", target_freq * 1000);
-
- freqs.old = sh_cpufreq_get(cpu);
- freqs.new = (freq + 500) / 1000;
- freqs.flags = 0;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- set_cpus_allowed_ptr(current, &cpus_allowed);
- clk_set_rate(cpuclk, freq);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- dev_dbg(dev, "set frequency %lu Hz\n", freq);
-
- return 0;
-}
-
-static int sh_cpufreq_verify(struct cpufreq_policy *policy)
-{
- struct clk *cpuclk = &per_cpu(sh_cpuclk, policy->cpu);
- struct cpufreq_frequency_table *freq_table;
-
- freq_table = cpuclk->nr_freqs ? cpuclk->freq_table : NULL;
- if (freq_table)
- return cpufreq_frequency_table_verify(policy, freq_table);
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- policy->min = (clk_round_rate(cpuclk, 1) + 500) / 1000;
- policy->max = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- return 0;
-}
-
-static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- unsigned int cpu = policy->cpu;
- struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
- struct cpufreq_frequency_table *freq_table;
- struct device *dev;
-
- dev = get_cpu_device(cpu);
-
- cpuclk = clk_get(dev, "cpu_clk");
- if (IS_ERR(cpuclk)) {
- dev_err(dev, "couldn't get CPU clk\n");
- return PTR_ERR(cpuclk);
- }
-
- policy->cur = sh_cpufreq_get(cpu);
-
- freq_table = cpuclk->nr_freqs ? cpuclk->freq_table : NULL;
- if (freq_table) {
- int result;
-
- result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
- if (!result)
- cpufreq_frequency_table_get_attr(freq_table, cpu);
- } else {
- dev_notice(dev, "no frequency table found, falling back "
- "to rate rounding.\n");
-
- policy->min = policy->cpuinfo.min_freq =
- (clk_round_rate(cpuclk, 1) + 500) / 1000;
- policy->max = policy->cpuinfo.max_freq =
- (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
- }
-
- policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
-
- dev_info(dev, "CPU Frequencies - Minimum %u.%03u MHz, "
- "Maximum %u.%03u MHz.\n",
- policy->min / 1000, policy->min % 1000,
- policy->max / 1000, policy->max % 1000);
-
- return 0;
-}
-
-static int sh_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- unsigned int cpu = policy->cpu;
- struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
-
- cpufreq_frequency_table_put_attr(cpu);
- clk_put(cpuclk);
-
- return 0;
-}
-
-static struct freq_attr *sh_freq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static struct cpufreq_driver sh_cpufreq_driver = {
- .owner = THIS_MODULE,
- .name = "sh",
- .get = sh_cpufreq_get,
- .target = sh_cpufreq_target,
- .verify = sh_cpufreq_verify,
- .init = sh_cpufreq_cpu_init,
- .exit = sh_cpufreq_cpu_exit,
- .attr = sh_freq_attr,
-};
-
-static int __init sh_cpufreq_module_init(void)
-{
- pr_notice("SuperH CPU frequency driver.\n");
- return cpufreq_register_driver(&sh_cpufreq_driver);
-}
-
-static void __exit sh_cpufreq_module_exit(void)
-{
- cpufreq_unregister_driver(&sh_cpufreq_driver);
-}
-
-module_init(sh_cpufreq_module_init);
-module_exit(sh_cpufreq_module_exit);
-
-MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
-MODULE_DESCRIPTION("cpufreq driver for SuperH");
-MODULE_LICENSE("GPL");
source "drivers/cpufreq/Kconfig.powerpc"
endmenu
+menu "SH CPU Frequency scaling"
+depends on SUPERH
+config SH_CPU_FREQ
+ tristate "SuperH CPU Frequency driver"
+ select CPU_FREQ_TABLE
+ help
+ This adds the cpufreq driver for SuperH. Any CPU that supports
+ clock rate rounding through the clock framework can use this
+ driver. While it will make the kernel slightly larger, this is
+ harmless for CPUs that don't support rate rounding. The driver
+ will also generate a notice in the boot log before disabling
+ itself if the CPU in question is not capable of rate rounding.
+
+ For details, take a look at <file:Documentation/cpu-freq>.
+
+ If unsure, say N.
+endmenu
+
endif
endmenu
obj-$(CONFIG_ETRAXFS) += cris-etraxfs-cpufreq.o
obj-$(CONFIG_IA64_ACPI_CPUFREQ) += ia64-acpi-cpufreq.o
obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o
+obj-$(CONFIG_SH_CPU_FREQ) += sh-cpufreq.o
--- /dev/null
+/*
+ * cpufreq driver for the SuperH processors.
+ *
+ * Copyright (C) 2002 - 2012 Paul Mundt
+ * Copyright (C) 2002 M. R. Brown
+ *
+ * Clock framework bits from arch/avr32/mach-at32ap/cpufreq.c
+ *
+ * Copyright (C) 2004-2007 Atmel Corporation
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "cpufreq: " fmt
+
+#include <linux/types.h>
+#include <linux/cpufreq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/cpumask.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/sched.h> /* set_cpus_allowed() */
+#include <linux/clk.h>
+#include <linux/percpu.h>
+#include <linux/sh_clk.h>
+
+static DEFINE_PER_CPU(struct clk, sh_cpuclk);
+
+static unsigned int sh_cpufreq_get(unsigned int cpu)
+{
+ return (clk_get_rate(&per_cpu(sh_cpuclk, cpu)) + 500) / 1000;
+}
+
+/*
+ * Here we notify other drivers of the proposed change and the final change.
+ */
+static int sh_cpufreq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ unsigned int cpu = policy->cpu;
+ struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
+ cpumask_t cpus_allowed;
+ struct cpufreq_freqs freqs;
+ struct device *dev;
+ long freq;
+
+ cpus_allowed = current->cpus_allowed;
+ set_cpus_allowed_ptr(current, cpumask_of(cpu));
+
+ BUG_ON(smp_processor_id() != cpu);
+
+ dev = get_cpu_device(cpu);
+
+ /* Convert target_freq from kHz to Hz */
+ freq = clk_round_rate(cpuclk, target_freq * 1000);
+
+ if (freq < (policy->min * 1000) || freq > (policy->max * 1000))
+ return -EINVAL;
+
+ dev_dbg(dev, "requested frequency %u Hz\n", target_freq * 1000);
+
+ freqs.old = sh_cpufreq_get(cpu);
+ freqs.new = (freq + 500) / 1000;
+ freqs.flags = 0;
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+ set_cpus_allowed_ptr(current, &cpus_allowed);
+ clk_set_rate(cpuclk, freq);
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+
+ dev_dbg(dev, "set frequency %lu Hz\n", freq);
+
+ return 0;
+}
+
+static int sh_cpufreq_verify(struct cpufreq_policy *policy)
+{
+ struct clk *cpuclk = &per_cpu(sh_cpuclk, policy->cpu);
+ struct cpufreq_frequency_table *freq_table;
+
+ freq_table = cpuclk->nr_freqs ? cpuclk->freq_table : NULL;
+ if (freq_table)
+ return cpufreq_frequency_table_verify(policy, freq_table);
+
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ policy->min = (clk_round_rate(cpuclk, 1) + 500) / 1000;
+ policy->max = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
+
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ return 0;
+}
+
+static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+ unsigned int cpu = policy->cpu;
+ struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
+ struct cpufreq_frequency_table *freq_table;
+ struct device *dev;
+
+ dev = get_cpu_device(cpu);
+
+ cpuclk = clk_get(dev, "cpu_clk");
+ if (IS_ERR(cpuclk)) {
+ dev_err(dev, "couldn't get CPU clk\n");
+ return PTR_ERR(cpuclk);
+ }
+
+ policy->cur = sh_cpufreq_get(cpu);
+
+ freq_table = cpuclk->nr_freqs ? cpuclk->freq_table : NULL;
+ if (freq_table) {
+ int result;
+
+ result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
+ if (!result)
+ cpufreq_frequency_table_get_attr(freq_table, cpu);
+ } else {
+ dev_notice(dev, "no frequency table found, falling back "
+ "to rate rounding.\n");
+
+ policy->min = policy->cpuinfo.min_freq =
+ (clk_round_rate(cpuclk, 1) + 500) / 1000;
+ policy->max = policy->cpuinfo.max_freq =
+ (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
+ }
+
+ policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
+
+ dev_info(dev, "CPU Frequencies - Minimum %u.%03u MHz, "
+ "Maximum %u.%03u MHz.\n",
+ policy->min / 1000, policy->min % 1000,
+ policy->max / 1000, policy->max % 1000);
+
+ return 0;
+}
+
+static int sh_cpufreq_cpu_exit(struct cpufreq_policy *policy)
+{
+ unsigned int cpu = policy->cpu;
+ struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
+
+ cpufreq_frequency_table_put_attr(cpu);
+ clk_put(cpuclk);
+
+ return 0;
+}
+
+static struct freq_attr *sh_freq_attr[] = {
+ &cpufreq_freq_attr_scaling_available_freqs,
+ NULL,
+};
+
+static struct cpufreq_driver sh_cpufreq_driver = {
+ .owner = THIS_MODULE,
+ .name = "sh",
+ .get = sh_cpufreq_get,
+ .target = sh_cpufreq_target,
+ .verify = sh_cpufreq_verify,
+ .init = sh_cpufreq_cpu_init,
+ .exit = sh_cpufreq_cpu_exit,
+ .attr = sh_freq_attr,
+};
+
+static int __init sh_cpufreq_module_init(void)
+{
+ pr_notice("SuperH CPU frequency driver.\n");
+ return cpufreq_register_driver(&sh_cpufreq_driver);
+}
+
+static void __exit sh_cpufreq_module_exit(void)
+{
+ cpufreq_unregister_driver(&sh_cpufreq_driver);
+}
+
+module_init(sh_cpufreq_module_init);
+module_exit(sh_cpufreq_module_exit);
+
+MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
+MODULE_DESCRIPTION("cpufreq driver for SuperH");
+MODULE_LICENSE("GPL");
projects / deliverable / linux.git / commitdiff
