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authorViresh Kumar <viresh.kumar@linaro.org>2013-04-04 12:54:17 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-10 13:19:25 +0200
commit81c720c90e6fbda5a1f53f932035de899f27adb6 (patch)
tree04a21b626b16a0d39b9270ac89c831f28d8132ab /arch/avr32/mach-at32ap
parent59a2e613d07fbd592ff711c87458eabcf9c98902 (diff)
downloadlinux-81c720c90e6fbda5a1f53f932035de899f27adb6.tar.gz
cpufreq: AVR32: move cpufreq driver to drivers/cpufreq
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>
Diffstat (limited to 'arch/avr32/mach-at32ap')
-rw-r--r--arch/avr32/mach-at32ap/Makefile1
-rw-r--r--arch/avr32/mach-at32ap/cpufreq.c123
2 files changed, 0 insertions, 124 deletions
diff --git a/arch/avr32/mach-at32ap/Makefile b/arch/avr32/mach-at32ap/Makefile
index 514c9a9..fc09ec4 100644
--- a/arch/avr32/mach-at32ap/Makefile
+++ b/arch/avr32/mach-at32ap/Makefile
@@ -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)
diff --git a/arch/avr32/mach-at32ap/cpufreq.c b/arch/avr32/mach-at32ap/cpufreq.c
deleted file mode 100644
index 6544887..0000000
--- a/arch/avr32/mach-at32ap/cpufreq.c
+++ /dev/null
@@ -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);