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cpufreq: AVR32: move cpufreq driver to drivers/cpufreq

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This patch moves cpufreq driver of AVR32 based at32ap platform to
drivers/cpufreq.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
2013-04-04 12:54:17 +00:00
committed by Rafael J. Wysocki
parent 59a2e613d0
commit 81c720c90e
19 changed files with 31 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/avr32/Kconfig
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@@ -250,20 +250,7 @@ config ARCH_SUSPEND_POSSIBLE
def_bool y
menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"
config CPU_FREQ_AT32AP
bool "CPU frequency driver for AT32AP"
depends on CPU_FREQ && PLATFORM_AT32AP
default n
help
This enables the CPU frequency driver for AT32AP processors.
For details, take a look in <file:Documentation/cpu-freq>.
If in doubt, say N.
endmenu
endmenu

2
arch/avr32/configs/atngw100_defconfig
View File

@@ -26,7 +26,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atngw100_evklcd100_defconfig
View File

@@ -28,7 +28,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atngw100_evklcd101_defconfig
View File

@@ -27,7 +27,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atngw100_mrmt_defconfig
View File

@@ -23,7 +23,7 @@ CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y

2
arch/avr32/configs/atngw100mkii_defconfig
View File

@@ -26,7 +26,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atngw100mkii_evklcd100_defconfig
View File

@@ -29,7 +29,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atngw100mkii_evklcd101_defconfig
View File

@@ -28,7 +28,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atstk1002_defconfig
View File

@@ -25,7 +25,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atstk1003_defconfig
View File

@@ -26,7 +26,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atstk1004_defconfig
View File

@@ -26,7 +26,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/atstk1006_defconfig
View File

@@ -26,7 +26,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_NET=y
CONFIG_PACKET=y

2
arch/avr32/configs/favr-32_defconfig
View File

@@ -27,7 +27,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y

2
arch/avr32/configs/hammerhead_defconfig
View File

@@ -31,7 +31,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y

2
arch/avr32/configs/mimc200_defconfig
View File

@@ -24,7 +24,7 @@ CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_STAT is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_AT32AP=y
CONFIG_AVR32_AT32AP_CPUFREQ=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y

1
arch/avr32/mach-at32ap/Makefile
View File

@@ -1,7 +1,6 @@
obj-y += pdc.o clock.o intc.o extint.o pio.o hsmc.o
obj-y += hmatrix.o
obj-$(CONFIG_CPU_AT32AP700X) += at32ap700x.o pm-at32ap700x.o
obj-$(CONFIG_CPU_FREQ_AT32AP) += cpufreq.o
obj-$(CONFIG_PM) += pm.o
ifeq ($(CONFIG_PM_DEBUG),y)

123
arch/avr32/mach-at32ap/cpufreq.c
View File

@@ -1,123 +0,0 @@
/*
* Copyright (C) 2004-2007 Atmel Corporation
*
* Based on MIPS implementation arch/mips/kernel/time.c
* Copyright 2001 MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*#define DEBUG*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/export.h>
static struct clk *cpuclk;
static int at32_verify_speed(struct cpufreq_policy *policy)
{
if (policy->cpu != 0)
return -EINVAL;
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
policy->cpuinfo.max_freq);
return 0;
}
static unsigned int at32_get_speed(unsigned int cpu)
{
/* No SMP support */
if (cpu)
return 0;
return (unsigned int)((clk_get_rate(cpuclk) + 500) / 1000);
}
static unsigned int ref_freq;
static unsigned long loops_per_jiffy_ref;
static int at32_set_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_freqs freqs;
long freq;
/* Convert target_freq from kHz to Hz */
freq = clk_round_rate(cpuclk, target_freq * 1000);
/* Check if policy->min <= new_freq <= policy->max */
if(freq < (policy->min * 1000) || freq > (policy->max * 1000))
return -EINVAL;
pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000);
freqs.old = at32_get_speed(0);
freqs.new = (freq + 500) / 1000;
freqs.flags = 0;
if (!ref_freq) {
ref_freq = freqs.old;
loops_per_jiffy_ref = boot_cpu_data.loops_per_jiffy;
}
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
if (freqs.old < freqs.new)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
loops_per_jiffy_ref, ref_freq, freqs.new);
clk_set_rate(cpuclk, freq);
if (freqs.new < freqs.old)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
loops_per_jiffy_ref, ref_freq, freqs.new);
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
pr_debug("cpufreq: set frequency %lu Hz\n", freq);
return 0;
}
static int __init at32_cpufreq_driver_init(struct cpufreq_policy *policy)
{
if (policy->cpu != 0)
return -EINVAL;
cpuclk = clk_get(NULL, "cpu");
if (IS_ERR(cpuclk)) {
pr_debug("cpufreq: could not get CPU clk\n");
return PTR_ERR(cpuclk);
}
policy->cpuinfo.min_freq = (clk_round_rate(cpuclk, 1) + 500) / 1000;
policy->cpuinfo.max_freq = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
policy->cpuinfo.transition_latency = 0;
policy->cur = at32_get_speed(0);
policy->min = policy->cpuinfo.min_freq;
policy->max = policy->cpuinfo.max_freq;
printk("cpufreq: AT32AP CPU frequency driver\n");
return 0;
}
static struct cpufreq_driver at32_driver = {
.name = "at32ap",
.owner = THIS_MODULE,
.init = at32_cpufreq_driver_init,
.verify = at32_verify_speed,
.target = at32_set_target,
.get = at32_get_speed,
.flags = CPUFREQ_STICKY,
};
static int __init at32_cpufreq_init(void)
{
return cpufreq_register_driver(&at32_driver);
}
late_initcall(at32_cpufreq_init);