Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: (23 commits) [CPUFREQ] EXYNOS: Removed useless headers and codes [CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driver [CPUFREQ] powernow-k8: Update copyright, maintainer and documentation information [CPUFREQ] powernow-k8: Fix indexing issue [CPUFREQ] powernow-k8: Avoid Pstate MSR accesses on systems supporting CPB [CPUFREQ] update lpj only if frequency has changed [CPUFREQ] cpufreq:userspace: fix cpu_cur_freq updation [CPUFREQ] Remove wall variable from cpufreq_gov_dbs_init() [CPUFREQ] EXYNOS4210: cpufreq code is changed for stable working [CPUFREQ] EXYNOS4210: Update frequency table for cpu divider [CPUFREQ] EXYNOS4210: Remove code about bus on cpufreq [CPUFREQ] s3c64xx: Use pr_fmt() for consistent log messages cpufreq: OMAP: fixup for omap_device changes, include <linux/module.h> cpufreq: OMAP: fix freq_table leak cpufreq: OMAP: put clk if cpu_init failed cpufreq: OMAP: only supports OPP library cpufreq: OMAP: dont support !freq_table cpufreq: OMAP: deny initialization if no mpudev cpufreq: OMAP: move clk name decision to init cpufreq: OMAP: notify even with bad boot frequency ...
This commit is contained in:
Linus Torvalds
commit
02d929502c
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@ -0,0 +1,34 @@
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/* linux/arch/arm/mach-exynos/include/mach/cpufreq.h
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*
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* Copyright (c) 2010 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* EXYNOS - CPUFreq support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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enum cpufreq_level_index {
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L0, L1, L2, L3, L4,
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L5, L6, L7, L8, L9,
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L10, L11, L12, L13, L14,
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L15, L16, L17, L18, L19,
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L20,
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};
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struct exynos_dvfs_info {
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unsigned long mpll_freq_khz;
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unsigned int pll_safe_idx;
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unsigned int pm_lock_idx;
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unsigned int max_support_idx;
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unsigned int min_support_idx;
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struct clk *cpu_clk;
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unsigned int *volt_table;
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struct cpufreq_frequency_table *freq_table;
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void (*set_freq)(unsigned int, unsigned int);
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bool (*need_apll_change)(unsigned int, unsigned int);
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};
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extern int exynos4210_cpufreq_init(struct exynos_dvfs_info *);
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@ -1,171 +0,0 @@
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/*
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* linux/arch/arm/plat-omap/cpu-omap.c
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*
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* CPU frequency scaling for OMAP
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*
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* Copyright (C) 2005 Nokia Corporation
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* Written by Tony Lindgren <tony@atomide.com>
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*
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* Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/cpufreq.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <plat/clock.h>
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#include <asm/system.h>
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#define VERY_HI_RATE 900000000
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static struct cpufreq_frequency_table *freq_table;
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#ifdef CONFIG_ARCH_OMAP1
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#define MPU_CLK "mpu"
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#else
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#define MPU_CLK "virt_prcm_set"
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#endif
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static struct clk *mpu_clk;
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/* TODO: Add support for SDRAM timing changes */
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static int omap_verify_speed(struct cpufreq_policy *policy)
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{
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if (freq_table)
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return cpufreq_frequency_table_verify(policy, freq_table);
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if (policy->cpu)
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return -EINVAL;
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cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
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policy->cpuinfo.max_freq);
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policy->min = clk_round_rate(mpu_clk, policy->min * 1000) / 1000;
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policy->max = clk_round_rate(mpu_clk, policy->max * 1000) / 1000;
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cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
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policy->cpuinfo.max_freq);
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return 0;
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}
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static unsigned int omap_getspeed(unsigned int cpu)
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{
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unsigned long rate;
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if (cpu)
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return 0;
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rate = clk_get_rate(mpu_clk) / 1000;
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return rate;
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}
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static int omap_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation)
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{
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struct cpufreq_freqs freqs;
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int ret = 0;
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/* Ensure desired rate is within allowed range. Some govenors
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* (ondemand) will just pass target_freq=0 to get the minimum. */
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if (target_freq < policy->min)
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target_freq = policy->min;
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if (target_freq > policy->max)
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target_freq = policy->max;
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freqs.old = omap_getspeed(0);
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freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
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freqs.cpu = 0;
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if (freqs.old == freqs.new)
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return ret;
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cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
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#ifdef CONFIG_CPU_FREQ_DEBUG
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printk(KERN_DEBUG "cpufreq-omap: transition: %u --> %u\n",
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freqs.old, freqs.new);
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#endif
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ret = clk_set_rate(mpu_clk, freqs.new * 1000);
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cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
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return ret;
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}
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static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
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{
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int result = 0;
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mpu_clk = clk_get(NULL, MPU_CLK);
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if (IS_ERR(mpu_clk))
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return PTR_ERR(mpu_clk);
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if (policy->cpu != 0)
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return -EINVAL;
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policy->cur = policy->min = policy->max = omap_getspeed(0);
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clk_init_cpufreq_table(&freq_table);
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if (freq_table) {
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result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
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if (!result)
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cpufreq_frequency_table_get_attr(freq_table,
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policy->cpu);
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} else {
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policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000;
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policy->cpuinfo.max_freq = clk_round_rate(mpu_clk,
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VERY_HI_RATE) / 1000;
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}
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/* FIXME: what's the actual transition time? */
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policy->cpuinfo.transition_latency = 300 * 1000;
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return 0;
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}
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static int omap_cpu_exit(struct cpufreq_policy *policy)
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{
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clk_exit_cpufreq_table(&freq_table);
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clk_put(mpu_clk);
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return 0;
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}
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static struct freq_attr *omap_cpufreq_attr[] = {
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&cpufreq_freq_attr_scaling_available_freqs,
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NULL,
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};
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static struct cpufreq_driver omap_driver = {
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.flags = CPUFREQ_STICKY,
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.verify = omap_verify_speed,
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.target = omap_target,
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.get = omap_getspeed,
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.init = omap_cpu_init,
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.exit = omap_cpu_exit,
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.name = "omap",
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.attr = omap_cpufreq_attr,
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};
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static int __init omap_cpufreq_init(void)
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{
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return cpufreq_register_driver(&omap_driver);
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}
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arch_initcall(omap_cpufreq_init);
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/*
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* if ever we want to remove this, upon cleanup call:
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*
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* cpufreq_unregister_driver()
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* cpufreq_frequency_table_put_attr()
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*/
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@ -21,12 +21,19 @@ config ARM_S5PV210_CPUFREQ
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If in doubt, say N.
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config ARM_EXYNOS_CPUFREQ
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bool "SAMSUNG EXYNOS SoCs"
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depends on ARCH_EXYNOS
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select ARM_EXYNOS4210_CPUFREQ if CPU_EXYNOS4210
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default y
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help
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This adds the CPUFreq driver common part for Samsung
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EXYNOS SoCs.
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If in doubt, say N.
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config ARM_EXYNOS4210_CPUFREQ
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bool "Samsung EXYNOS4210"
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depends on CPU_EXYNOS4210
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default y
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help
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This adds the CPUFreq driver for Samsung EXYNOS4210
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SoC (S5PV310 or S5PC210).
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If in doubt, say N.
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@ -42,7 +42,9 @@ obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o
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obj-$(CONFIG_UX500_SOC_DB8500) += db8500-cpufreq.o
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obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o
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obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
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obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
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obj-$(CONFIG_ARCH_OMAP2PLUS) += omap-cpufreq.o
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##################################################################################
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# PowerPC platform drivers
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@ -204,8 +204,7 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
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pr_debug("saving %lu as reference value for loops_per_jiffy; "
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"freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
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}
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if ((val == CPUFREQ_PRECHANGE && ci->old < ci->new) ||
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(val == CPUFREQ_POSTCHANGE && ci->old > ci->new) ||
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if ((val == CPUFREQ_POSTCHANGE && ci->old != ci->new) ||
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(val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
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loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
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ci->new);
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|
|
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@ -713,11 +713,10 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
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static int __init cpufreq_gov_dbs_init(void)
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{
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cputime64_t wall;
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u64 idle_time;
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int cpu = get_cpu();
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idle_time = get_cpu_idle_time_us(cpu, &wall);
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idle_time = get_cpu_idle_time_us(cpu, NULL);
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put_cpu();
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if (idle_time != -1ULL) {
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/* Idle micro accounting is supported. Use finer thresholds */
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|
|
|
|||
|
|
@ -47,9 +47,11 @@ userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
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if (!per_cpu(cpu_is_managed, freq->cpu))
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return 0;
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|
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pr_debug("saving cpu_cur_freq of cpu %u to be %u kHz\n",
|
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freq->cpu, freq->new);
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per_cpu(cpu_cur_freq, freq->cpu) = freq->new;
|
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if (val == CPUFREQ_POSTCHANGE) {
|
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pr_debug("saving cpu_cur_freq of cpu %u to be %u kHz\n",
|
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freq->cpu, freq->new);
|
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per_cpu(cpu_cur_freq, freq->cpu) = freq->new;
|
||||
}
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||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,290 @@
|
|||
/*
|
||||
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
|
||||
* http://www.samsung.com
|
||||
*
|
||||
* EXYNOS - CPU frequency scaling support for EXYNOS series
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/regulator/consumer.h>
|
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#include <linux/cpufreq.h>
|
||||
#include <linux/suspend.h>
|
||||
|
||||
#include <mach/cpufreq.h>
|
||||
|
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#include <plat/cpu.h>
|
||||
|
||||
static struct exynos_dvfs_info *exynos_info;
|
||||
|
||||
static struct regulator *arm_regulator;
|
||||
static struct cpufreq_freqs freqs;
|
||||
|
||||
static unsigned int locking_frequency;
|
||||
static bool frequency_locked;
|
||||
static DEFINE_MUTEX(cpufreq_lock);
|
||||
|
||||
int exynos_verify_speed(struct cpufreq_policy *policy)
|
||||
{
|
||||
return cpufreq_frequency_table_verify(policy,
|
||||
exynos_info->freq_table);
|
||||
}
|
||||
|
||||
unsigned int exynos_getspeed(unsigned int cpu)
|
||||
{
|
||||
return clk_get_rate(exynos_info->cpu_clk) / 1000;
|
||||
}
|
||||
|
||||
static int exynos_target(struct cpufreq_policy *policy,
|
||||
unsigned int target_freq,
|
||||
unsigned int relation)
|
||||
{
|
||||
unsigned int index, old_index;
|
||||
unsigned int arm_volt, safe_arm_volt = 0;
|
||||
int ret = 0;
|
||||
struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
|
||||
unsigned int *volt_table = exynos_info->volt_table;
|
||||
unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz;
|
||||
|
||||
mutex_lock(&cpufreq_lock);
|
||||
|
||||
freqs.old = policy->cur;
|
||||
|
||||
if (frequency_locked && target_freq != locking_frequency) {
|
||||
ret = -EAGAIN;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (cpufreq_frequency_table_target(policy, freq_table,
|
||||
freqs.old, relation, &old_index)) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (cpufreq_frequency_table_target(policy, freq_table,
|
||||
target_freq, relation, &index)) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
freqs.new = freq_table[index].frequency;
|
||||
freqs.cpu = policy->cpu;
|
||||
|
||||
/*
|
||||
* ARM clock source will be changed APLL to MPLL temporary
|
||||
* To support this level, need to control regulator for
|
||||
* required voltage level
|
||||
*/
|
||||
if (exynos_info->need_apll_change != NULL) {
|
||||
if (exynos_info->need_apll_change(old_index, index) &&
|
||||
(freq_table[index].frequency < mpll_freq_khz) &&
|
||||
(freq_table[old_index].frequency < mpll_freq_khz))
|
||||
safe_arm_volt = volt_table[exynos_info->pll_safe_idx];
|
||||
}
|
||||
arm_volt = volt_table[index];
|
||||
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
||||
|
||||
/* When the new frequency is higher than current frequency */
|
||||
if ((freqs.new > freqs.old) && !safe_arm_volt) {
|
||||
/* Firstly, voltage up to increase frequency */
|
||||
regulator_set_voltage(arm_regulator, arm_volt,
|
||||
arm_volt);
|
||||
}
|
||||
|
||||
if (safe_arm_volt)
|
||||
regulator_set_voltage(arm_regulator, safe_arm_volt,
|
||||
safe_arm_volt);
|
||||
if (freqs.new != freqs.old)
|
||||
exynos_info->set_freq(old_index, index);
|
||||
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
|
||||
|
||||
/* When the new frequency is lower than current frequency */
|
||||
if ((freqs.new < freqs.old) ||
|
||||
((freqs.new > freqs.old) && safe_arm_volt)) {
|
||||
/* down the voltage after frequency change */
|
||||
regulator_set_voltage(arm_regulator, arm_volt,
|
||||
arm_volt);
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int exynos_cpufreq_suspend(struct cpufreq_policy *policy)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int exynos_cpufreq_resume(struct cpufreq_policy *policy)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
* exynos_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume
|
||||
* context
|
||||
* @notifier
|
||||
* @pm_event
|
||||
* @v
|
||||
*
|
||||
* While frequency_locked == true, target() ignores every frequency but
|
||||
* locking_frequency. The locking_frequency value is the initial frequency,
|
||||
* which is set by the bootloader. In order to eliminate possible
|
||||
* inconsistency in clock values, we save and restore frequencies during
|
||||
* suspend and resume and block CPUFREQ activities. Note that the standard
|
||||
* suspend/resume cannot be used as they are too deep (syscore_ops) for
|
||||
* regulator actions.
|
||||
*/
|
||||
static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier,
|
||||
unsigned long pm_event, void *v)
|
||||
{
|
||||
struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */
|
||||
static unsigned int saved_frequency;
|
||||
unsigned int temp;
|
||||
|
||||
mutex_lock(&cpufreq_lock);
|
||||
switch (pm_event) {
|
||||
case PM_SUSPEND_PREPARE:
|
||||
if (frequency_locked)
|
||||
goto out;
|
||||
|
||||
frequency_locked = true;
|
||||
|
||||
if (locking_frequency) {
|
||||
saved_frequency = exynos_getspeed(0);
|
||||
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
exynos_target(policy, locking_frequency,
|
||||
CPUFREQ_RELATION_H);
|
||||
mutex_lock(&cpufreq_lock);
|
||||
}
|
||||
break;
|
||||
|
||||
case PM_POST_SUSPEND:
|
||||
if (saved_frequency) {
|
||||
/*
|
||||
* While frequency_locked, only locking_frequency
|
||||
* is valid for target(). In order to use
|
||||
* saved_frequency while keeping frequency_locked,
|
||||
* we temporarly overwrite locking_frequency.
|
||||
*/
|
||||
temp = locking_frequency;
|
||||
locking_frequency = saved_frequency;
|
||||
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
exynos_target(policy, locking_frequency,
|
||||
CPUFREQ_RELATION_H);
|
||||
mutex_lock(&cpufreq_lock);
|
||||
|
||||
locking_frequency = temp;
|
||||
}
|
||||
frequency_locked = false;
|
||||
break;
|
||||
}
|
||||
out:
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static struct notifier_block exynos_cpufreq_nb = {
|
||||
.notifier_call = exynos_cpufreq_pm_notifier,
|
||||
};
|
||||
|
||||
static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
|
||||
{
|
||||
policy->cur = policy->min = policy->max = exynos_getspeed(policy->cpu);
|
||||
|
||||
cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu);
|
||||
|
||||
/* set the transition latency value */
|
||||
policy->cpuinfo.transition_latency = 100000;
|
||||
|
||||
/*
|
||||
* EXYNOS4 multi-core processors has 2 cores
|
||||
* that the frequency cannot be set independently.
|
||||
* Each cpu is bound to the same speed.
|
||||
* So the affected cpu is all of the cpus.
|
||||
*/
|
||||
if (num_online_cpus() == 1) {
|
||||
cpumask_copy(policy->related_cpus, cpu_possible_mask);
|
||||
cpumask_copy(policy->cpus, cpu_online_mask);
|
||||
} else {
|
||||
cpumask_setall(policy->cpus);
|
||||
}
|
||||
|
||||
return cpufreq_frequency_table_cpuinfo(policy, exynos_info->freq_table);
|
||||
}
|
||||
|
||||
static struct cpufreq_driver exynos_driver = {
|
||||
.flags = CPUFREQ_STICKY,
|
||||
.verify = exynos_verify_speed,
|
||||
.target = exynos_target,
|
||||
.get = exynos_getspeed,
|
||||
.init = exynos_cpufreq_cpu_init,
|
||||
.name = "exynos_cpufreq",
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = exynos_cpufreq_suspend,
|
||||
.resume = exynos_cpufreq_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int __init exynos_cpufreq_init(void)
|
||||
{
|
||||
int ret = -EINVAL;
|
||||
|
||||
exynos_info = kzalloc(sizeof(struct exynos_dvfs_info), GFP_KERNEL);
|
||||
if (!exynos_info)
|
||||
return -ENOMEM;
|
||||
|
||||
if (soc_is_exynos4210())
|
||||
ret = exynos4210_cpufreq_init(exynos_info);
|
||||
else
|
||||
pr_err("%s: CPU type not found\n", __func__);
|
||||
|
||||
if (ret)
|
||||
goto err_vdd_arm;
|
||||
|
||||
if (exynos_info->set_freq == NULL) {
|
||||
pr_err("%s: No set_freq function (ERR)\n", __func__);
|
||||
goto err_vdd_arm;
|
||||
}
|
||||
|
||||
arm_regulator = regulator_get(NULL, "vdd_arm");
|
||||
if (IS_ERR(arm_regulator)) {
|
||||
pr_err("%s: failed to get resource vdd_arm\n", __func__);
|
||||
goto err_vdd_arm;
|
||||
}
|
||||
|
||||
register_pm_notifier(&exynos_cpufreq_nb);
|
||||
|
||||
if (cpufreq_register_driver(&exynos_driver)) {
|
||||
pr_err("%s: failed to register cpufreq driver\n", __func__);
|
||||
goto err_cpufreq;
|
||||
}
|
||||
|
||||
return 0;
|
||||
err_cpufreq:
|
||||
unregister_pm_notifier(&exynos_cpufreq_nb);
|
||||
|
||||
if (!IS_ERR(arm_regulator))
|
||||
regulator_put(arm_regulator);
|
||||
err_vdd_arm:
|
||||
kfree(exynos_info);
|
||||
pr_debug("%s: failed initialization\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
late_initcall(exynos_cpufreq_init);
|
||||
|
|
@ -2,61 +2,52 @@
|
|||
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
|
||||
* http://www.samsung.com
|
||||
*
|
||||
* EXYNOS4 - CPU frequency scaling support
|
||||
* EXYNOS4210 - CPU frequency scaling support
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/cpufreq.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/suspend.h>
|
||||
|
||||
#include <mach/map.h>
|
||||
#include <mach/regs-clock.h>
|
||||
#include <mach/regs-mem.h>
|
||||
#include <mach/cpufreq.h>
|
||||
|
||||
#include <plat/clock.h>
|
||||
#include <plat/pm.h>
|
||||
#define CPUFREQ_LEVEL_END L5
|
||||
|
||||
static int max_support_idx = L0;
|
||||
static int min_support_idx = (CPUFREQ_LEVEL_END - 1);
|
||||
|
||||
static struct clk *cpu_clk;
|
||||
static struct clk *moutcore;
|
||||
static struct clk *mout_mpll;
|
||||
static struct clk *mout_apll;
|
||||
|
||||
static struct regulator *arm_regulator;
|
||||
static struct regulator *int_regulator;
|
||||
|
||||
static struct cpufreq_freqs freqs;
|
||||
static unsigned int memtype;
|
||||
|
||||
static unsigned int locking_frequency;
|
||||
static bool frequency_locked;
|
||||
static DEFINE_MUTEX(cpufreq_lock);
|
||||
|
||||
enum exynos4_memory_type {
|
||||
DDR2 = 4,
|
||||
LPDDR2,
|
||||
DDR3,
|
||||
struct cpufreq_clkdiv {
|
||||
unsigned int index;
|
||||
unsigned int clkdiv;
|
||||
};
|
||||
|
||||
enum cpufreq_level_index {
|
||||
L0, L1, L2, L3, CPUFREQ_LEVEL_END,
|
||||
static unsigned int exynos4210_volt_table[CPUFREQ_LEVEL_END] = {
|
||||
1250000, 1150000, 1050000, 975000, 950000,
|
||||
};
|
||||
|
||||
static struct cpufreq_frequency_table exynos4_freq_table[] = {
|
||||
{L0, 1000*1000},
|
||||
{L1, 800*1000},
|
||||
{L2, 400*1000},
|
||||
{L3, 100*1000},
|
||||
|
||||
static struct cpufreq_clkdiv exynos4210_clkdiv_table[CPUFREQ_LEVEL_END];
|
||||
|
||||
static struct cpufreq_frequency_table exynos4210_freq_table[] = {
|
||||
{L0, 1200*1000},
|
||||
{L1, 1000*1000},
|
||||
{L2, 800*1000},
|
||||
{L3, 500*1000},
|
||||
{L4, 200*1000},
|
||||
{0, CPUFREQ_TABLE_END},
|
||||
};
|
||||
|
||||
|
|
@ -67,17 +58,20 @@ static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = {
|
|||
* DIVATB, DIVPCLK_DBG, DIVAPLL }
|
||||
*/
|
||||
|
||||
/* ARM L0: 1000MHz */
|
||||
{ 0, 3, 7, 3, 3, 0, 1 },
|
||||
/* ARM L0: 1200MHz */
|
||||
{ 0, 3, 7, 3, 4, 1, 7 },
|
||||
|
||||
/* ARM L1: 800MHz */
|
||||
{ 0, 3, 7, 3, 3, 0, 1 },
|
||||
/* ARM L1: 1000MHz */
|
||||
{ 0, 3, 7, 3, 4, 1, 7 },
|
||||
|
||||
/* ARM L2: 400MHz */
|
||||
{ 0, 1, 3, 1, 3, 0, 1 },
|
||||
/* ARM L2: 800MHz */
|
||||
{ 0, 3, 7, 3, 3, 1, 7 },
|
||||
|
||||
/* ARM L3: 100MHz */
|
||||
{ 0, 0, 1, 0, 3, 1, 1 },
|
||||
/* ARM L3: 500MHz */
|
||||
{ 0, 3, 7, 3, 3, 1, 7 },
|
||||
|
||||
/* ARM L4: 200MHz */
|
||||
{ 0, 1, 3, 1, 3, 1, 0 },
|
||||
};
|
||||
|
||||
static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
|
||||
|
|
@ -86,147 +80,46 @@ static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
|
|||
* { DIVCOPY, DIVHPM }
|
||||
*/
|
||||
|
||||
/* ARM L0: 1000MHz */
|
||||
/* ARM L0: 1200MHz */
|
||||
{ 5, 0 },
|
||||
|
||||
/* ARM L1: 1000MHz */
|
||||
{ 4, 0 },
|
||||
|
||||
/* ARM L2: 800MHz */
|
||||
{ 3, 0 },
|
||||
|
||||
/* ARM L1: 800MHz */
|
||||
/* ARM L3: 500MHz */
|
||||
{ 3, 0 },
|
||||
|
||||
/* ARM L2: 400MHz */
|
||||
{ 3, 0 },
|
||||
|
||||
/* ARM L3: 100MHz */
|
||||
/* ARM L4: 200MHz */
|
||||
{ 3, 0 },
|
||||
};
|
||||
|
||||
static unsigned int clkdiv_dmc0[CPUFREQ_LEVEL_END][8] = {
|
||||
/*
|
||||
* Clock divider value for following
|
||||
* { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD
|
||||
* DIVDMCP, DIVCOPY2, DIVCORE_TIMERS }
|
||||
*/
|
||||
static unsigned int exynos4210_apll_pms_table[CPUFREQ_LEVEL_END] = {
|
||||
/* APLL FOUT L0: 1200MHz */
|
||||
((150 << 16) | (3 << 8) | 1),
|
||||
|
||||
/* DMC L0: 400MHz */
|
||||
{ 3, 1, 1, 1, 1, 1, 3, 1 },
|
||||
|
||||
/* DMC L1: 400MHz */
|
||||
{ 3, 1, 1, 1, 1, 1, 3, 1 },
|
||||
|
||||
/* DMC L2: 266.7MHz */
|
||||
{ 7, 1, 1, 2, 1, 1, 3, 1 },
|
||||
|
||||
/* DMC L3: 200MHz */
|
||||
{ 7, 1, 1, 3, 1, 1, 3, 1 },
|
||||
};
|
||||
|
||||
static unsigned int clkdiv_top[CPUFREQ_LEVEL_END][5] = {
|
||||
/*
|
||||
* Clock divider value for following
|
||||
* { DIVACLK200, DIVACLK100, DIVACLK160, DIVACLK133, DIVONENAND }
|
||||
*/
|
||||
|
||||
/* ACLK200 L0: 200MHz */
|
||||
{ 3, 7, 4, 5, 1 },
|
||||
|
||||
/* ACLK200 L1: 200MHz */
|
||||
{ 3, 7, 4, 5, 1 },
|
||||
|
||||
/* ACLK200 L2: 160MHz */
|
||||
{ 4, 7, 5, 7, 1 },
|
||||
|
||||
/* ACLK200 L3: 133.3MHz */
|
||||
{ 5, 7, 7, 7, 1 },
|
||||
};
|
||||
|
||||
static unsigned int clkdiv_lr_bus[CPUFREQ_LEVEL_END][2] = {
|
||||
/*
|
||||
* Clock divider value for following
|
||||
* { DIVGDL/R, DIVGPL/R }
|
||||
*/
|
||||
|
||||
/* ACLK_GDL/R L0: 200MHz */
|
||||
{ 3, 1 },
|
||||
|
||||
/* ACLK_GDL/R L1: 200MHz */
|
||||
{ 3, 1 },
|
||||
|
||||
/* ACLK_GDL/R L2: 160MHz */
|
||||
{ 4, 1 },
|
||||
|
||||
/* ACLK_GDL/R L3: 133.3MHz */
|
||||
{ 5, 1 },
|
||||
};
|
||||
|
||||
struct cpufreq_voltage_table {
|
||||
unsigned int index; /* any */
|
||||
unsigned int arm_volt; /* uV */
|
||||
unsigned int int_volt;
|
||||
};
|
||||
|
||||
static struct cpufreq_voltage_table exynos4_volt_table[CPUFREQ_LEVEL_END] = {
|
||||
{
|
||||
.index = L0,
|
||||
.arm_volt = 1200000,
|
||||
.int_volt = 1100000,
|
||||
}, {
|
||||
.index = L1,
|
||||
.arm_volt = 1100000,
|
||||
.int_volt = 1100000,
|
||||
}, {
|
||||
.index = L2,
|
||||
.arm_volt = 1000000,
|
||||
.int_volt = 1000000,
|
||||
}, {
|
||||
.index = L3,
|
||||
.arm_volt = 900000,
|
||||
.int_volt = 1000000,
|
||||
},
|
||||
};
|
||||
|
||||
static unsigned int exynos4_apll_pms_table[CPUFREQ_LEVEL_END] = {
|
||||
/* APLL FOUT L0: 1000MHz */
|
||||
/* APLL FOUT L1: 1000MHz */
|
||||
((250 << 16) | (6 << 8) | 1),
|
||||
|
||||
/* APLL FOUT L1: 800MHz */
|
||||
/* APLL FOUT L2: 800MHz */
|
||||
((200 << 16) | (6 << 8) | 1),
|
||||
|
||||
/* APLL FOUT L2 : 400MHz */
|
||||
((200 << 16) | (6 << 8) | 2),
|
||||
/* APLL FOUT L3: 500MHz */
|
||||
((250 << 16) | (6 << 8) | 2),
|
||||
|
||||
/* APLL FOUT L3: 100MHz */
|
||||
((200 << 16) | (6 << 8) | 4),
|
||||
/* APLL FOUT L4: 200MHz */
|
||||
((200 << 16) | (6 << 8) | 3),
|
||||
};
|
||||
|
||||
static int exynos4_verify_speed(struct cpufreq_policy *policy)
|
||||
{
|
||||
return cpufreq_frequency_table_verify(policy, exynos4_freq_table);
|
||||
}
|
||||
|
||||
static unsigned int exynos4_getspeed(unsigned int cpu)
|
||||
{
|
||||
return clk_get_rate(cpu_clk) / 1000;
|
||||
}
|
||||
|
||||
static void exynos4_set_clkdiv(unsigned int div_index)
|
||||
static void exynos4210_set_clkdiv(unsigned int div_index)
|
||||
{
|
||||
unsigned int tmp;
|
||||
|
||||
/* Change Divider - CPU0 */
|
||||
|
||||
tmp = __raw_readl(S5P_CLKDIV_CPU);
|
||||
|
||||
tmp &= ~(S5P_CLKDIV_CPU0_CORE_MASK | S5P_CLKDIV_CPU0_COREM0_MASK |
|
||||
S5P_CLKDIV_CPU0_COREM1_MASK | S5P_CLKDIV_CPU0_PERIPH_MASK |
|
||||
S5P_CLKDIV_CPU0_ATB_MASK | S5P_CLKDIV_CPU0_PCLKDBG_MASK |
|
||||
S5P_CLKDIV_CPU0_APLL_MASK);
|
||||
|
||||
tmp |= ((clkdiv_cpu0[div_index][0] << S5P_CLKDIV_CPU0_CORE_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][1] << S5P_CLKDIV_CPU0_COREM0_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][2] << S5P_CLKDIV_CPU0_COREM1_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][3] << S5P_CLKDIV_CPU0_PERIPH_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][4] << S5P_CLKDIV_CPU0_ATB_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][5] << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT) |
|
||||
(clkdiv_cpu0[div_index][6] << S5P_CLKDIV_CPU0_APLL_SHIFT));
|
||||
tmp = exynos4210_clkdiv_table[div_index].clkdiv;
|
||||
|
||||
__raw_writel(tmp, S5P_CLKDIV_CPU);
|
||||
|
||||
|
|
@ -248,83 +141,9 @@ static void exynos4_set_clkdiv(unsigned int div_index)
|
|||
do {
|
||||
tmp = __raw_readl(S5P_CLKDIV_STATCPU1);
|
||||
} while (tmp & 0x11);
|
||||
|
||||
/* Change Divider - DMC0 */
|
||||
|
||||
tmp = __raw_readl(S5P_CLKDIV_DMC0);
|
||||
|
||||
tmp &= ~(S5P_CLKDIV_DMC0_ACP_MASK | S5P_CLKDIV_DMC0_ACPPCLK_MASK |
|
||||
S5P_CLKDIV_DMC0_DPHY_MASK | S5P_CLKDIV_DMC0_DMC_MASK |
|
||||
S5P_CLKDIV_DMC0_DMCD_MASK | S5P_CLKDIV_DMC0_DMCP_MASK |
|
||||
S5P_CLKDIV_DMC0_COPY2_MASK | S5P_CLKDIV_DMC0_CORETI_MASK);
|
||||
|
||||
tmp |= ((clkdiv_dmc0[div_index][0] << S5P_CLKDIV_DMC0_ACP_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][1] << S5P_CLKDIV_DMC0_ACPPCLK_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][2] << S5P_CLKDIV_DMC0_DPHY_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][3] << S5P_CLKDIV_DMC0_DMC_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][4] << S5P_CLKDIV_DMC0_DMCD_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][5] << S5P_CLKDIV_DMC0_DMCP_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][6] << S5P_CLKDIV_DMC0_COPY2_SHIFT) |
|
||||
(clkdiv_dmc0[div_index][7] << S5P_CLKDIV_DMC0_CORETI_SHIFT));
|
||||
|
||||
__raw_writel(tmp, S5P_CLKDIV_DMC0);
|
||||
|
||||
do {
|
||||
tmp = __raw_readl(S5P_CLKDIV_STAT_DMC0);
|
||||
} while (tmp & 0x11111111);
|
||||
|
||||
/* Change Divider - TOP */
|
||||
|
||||
tmp = __raw_readl(S5P_CLKDIV_TOP);
|
||||
|
||||
tmp &= ~(S5P_CLKDIV_TOP_ACLK200_MASK | S5P_CLKDIV_TOP_ACLK100_MASK |
|
||||
S5P_CLKDIV_TOP_ACLK160_MASK | S5P_CLKDIV_TOP_ACLK133_MASK |
|
||||
S5P_CLKDIV_TOP_ONENAND_MASK);
|
||||
|
||||
tmp |= ((clkdiv_top[div_index][0] << S5P_CLKDIV_TOP_ACLK200_SHIFT) |
|
||||
(clkdiv_top[div_index][1] << S5P_CLKDIV_TOP_ACLK100_SHIFT) |
|
||||
(clkdiv_top[div_index][2] << S5P_CLKDIV_TOP_ACLK160_SHIFT) |
|
||||
(clkdiv_top[div_index][3] << S5P_CLKDIV_TOP_ACLK133_SHIFT) |
|
||||
(clkdiv_top[div_index][4] << S5P_CLKDIV_TOP_ONENAND_SHIFT));
|
||||
|
||||
__raw_writel(tmp, S5P_CLKDIV_TOP);
|
||||
|
||||
do {
|
||||
tmp = __raw_readl(S5P_CLKDIV_STAT_TOP);
|
||||
} while (tmp & 0x11111);
|
||||
|
||||
/* Change Divider - LEFTBUS */
|
||||
|
||||
tmp = __raw_readl(S5P_CLKDIV_LEFTBUS);
|
||||
|
||||
tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
|
||||
|
||||
tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
|
||||
(clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
|
||||
|
||||
__raw_writel(tmp, S5P_CLKDIV_LEFTBUS);
|
||||
|
||||
do {
|
||||
tmp = __raw_readl(S5P_CLKDIV_STAT_LEFTBUS);
|
||||
} while (tmp & 0x11);
|
||||
|
||||
/* Change Divider - RIGHTBUS */
|
||||
|
||||
tmp = __raw_readl(S5P_CLKDIV_RIGHTBUS);
|
||||
|
||||
tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
|
||||
|
||||
tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
|
||||
(clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
|
||||
|
||||
__raw_writel(tmp, S5P_CLKDIV_RIGHTBUS);
|
||||
|
||||
do {
|
||||
tmp = __raw_readl(S5P_CLKDIV_STAT_RIGHTBUS);
|
||||
} while (tmp & 0x11);
|
||||
}
|
||||
|
||||
static void exynos4_set_apll(unsigned int index)
|
||||
static void exynos4210_set_apll(unsigned int index)
|
||||
{
|
||||
unsigned int tmp;
|
||||
|
||||
|
|
@ -343,7 +162,7 @@ static void exynos4_set_apll(unsigned int index)
|
|||
/* 3. Change PLL PMS values */
|
||||
tmp = __raw_readl(S5P_APLL_CON0);
|
||||
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
|
||||
tmp |= exynos4_apll_pms_table[index];
|
||||
tmp |= exynos4210_apll_pms_table[index];
|
||||
__raw_writel(tmp, S5P_APLL_CON0);
|
||||
|
||||
/* 4. wait_lock_time */
|
||||
|
|
@ -360,328 +179,126 @@ static void exynos4_set_apll(unsigned int index)
|
|||
} while (tmp != (0x1 << S5P_CLKSRC_CPU_MUXCORE_SHIFT));
|
||||
}
|
||||
|
||||
static void exynos4_set_frequency(unsigned int old_index, unsigned int new_index)
|
||||
bool exynos4210_pms_change(unsigned int old_index, unsigned int new_index)
|
||||
{
|
||||
unsigned int old_pm = (exynos4210_apll_pms_table[old_index] >> 8);
|
||||
unsigned int new_pm = (exynos4210_apll_pms_table[new_index] >> 8);
|
||||
|
||||
return (old_pm == new_pm) ? 0 : 1;
|
||||
}
|
||||
|
||||
static void exynos4210_set_frequency(unsigned int old_index,
|
||||
unsigned int new_index)
|
||||
{
|
||||
unsigned int tmp;
|
||||
|
||||
if (old_index > new_index) {
|
||||
/* The frequency changing to L0 needs to change apll */
|
||||
if (freqs.new == exynos4_freq_table[L0].frequency) {
|
||||
if (!exynos4210_pms_change(old_index, new_index)) {
|
||||
/* 1. Change the system clock divider values */
|
||||
exynos4_set_clkdiv(new_index);
|
||||
|
||||
/* 2. Change the apll m,p,s value */
|
||||
exynos4_set_apll(new_index);
|
||||
} else {
|
||||
/* 1. Change the system clock divider values */
|
||||
exynos4_set_clkdiv(new_index);
|
||||
exynos4210_set_clkdiv(new_index);
|
||||
|
||||
/* 2. Change just s value in apll m,p,s value */
|
||||
tmp = __raw_readl(S5P_APLL_CON0);
|
||||
tmp &= ~(0x7 << 0);
|
||||
tmp |= (exynos4_apll_pms_table[new_index] & 0x7);
|
||||
tmp |= (exynos4210_apll_pms_table[new_index] & 0x7);
|
||||
__raw_writel(tmp, S5P_APLL_CON0);
|
||||
}
|
||||
}
|
||||
|
||||
else if (old_index < new_index) {
|
||||
/* The frequency changing from L0 needs to change apll */
|
||||
if (freqs.old == exynos4_freq_table[L0].frequency) {
|
||||
/* 1. Change the apll m,p,s value */
|
||||
exynos4_set_apll(new_index);
|
||||
|
||||
/* 2. Change the system clock divider values */
|
||||
exynos4_set_clkdiv(new_index);
|
||||
} else {
|
||||
/* Clock Configuration Procedure */
|
||||
/* 1. Change the system clock divider values */
|
||||
exynos4210_set_clkdiv(new_index);
|
||||
/* 2. Change the apll m,p,s value */
|
||||
exynos4210_set_apll(new_index);
|
||||
}
|
||||
} else if (old_index < new_index) {
|
||||
if (!exynos4210_pms_change(old_index, new_index)) {
|
||||
/* 1. Change just s value in apll m,p,s value */
|
||||
tmp = __raw_readl(S5P_APLL_CON0);
|
||||
tmp &= ~(0x7 << 0);
|
||||
tmp |= (exynos4_apll_pms_table[new_index] & 0x7);
|
||||
tmp |= (exynos4210_apll_pms_table[new_index] & 0x7);
|
||||
__raw_writel(tmp, S5P_APLL_CON0);
|
||||
|
||||
/* 2. Change the system clock divider values */
|
||||
exynos4_set_clkdiv(new_index);
|
||||
exynos4210_set_clkdiv(new_index);
|
||||
} else {
|
||||
/* Clock Configuration Procedure */
|
||||
/* 1. Change the apll m,p,s value */
|
||||
exynos4210_set_apll(new_index);
|
||||
/* 2. Change the system clock divider values */
|
||||
exynos4210_set_clkdiv(new_index);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int exynos4_target(struct cpufreq_policy *policy,
|
||||
unsigned int target_freq,
|
||||
unsigned int relation)
|
||||
int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
|
||||
{
|
||||
unsigned int index, old_index;
|
||||
unsigned int arm_volt, int_volt;
|
||||
int err = -EINVAL;
|
||||
int i;
|
||||
unsigned int tmp;
|
||||
unsigned long rate;
|
||||
|
||||
freqs.old = exynos4_getspeed(policy->cpu);
|
||||
|
||||
mutex_lock(&cpufreq_lock);
|
||||
|
||||
if (frequency_locked && target_freq != locking_frequency) {
|
||||
err = -EAGAIN;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
|
||||
freqs.old, relation, &old_index))
|
||||
goto out;
|
||||
|
||||
if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
|
||||
target_freq, relation, &index))
|
||||
goto out;
|
||||
|
||||
err = 0;
|
||||
|
||||
freqs.new = exynos4_freq_table[index].frequency;
|
||||
freqs.cpu = policy->cpu;
|
||||
|
||||
if (freqs.new == freqs.old)
|
||||
goto out;
|
||||
|
||||
/* get the voltage value */
|
||||
arm_volt = exynos4_volt_table[index].arm_volt;
|
||||
int_volt = exynos4_volt_table[index].int_volt;
|
||||
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
||||
|
||||
/* control regulator */
|
||||
if (freqs.new > freqs.old) {
|
||||
/* Voltage up */
|
||||
regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
|
||||
regulator_set_voltage(int_regulator, int_volt, int_volt);
|
||||
}
|
||||
|
||||
/* Clock Configuration Procedure */
|
||||
exynos4_set_frequency(old_index, index);
|
||||
|
||||
/* control regulator */
|
||||
if (freqs.new < freqs.old) {
|
||||
/* Voltage down */
|
||||
regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
|
||||
regulator_set_voltage(int_regulator, int_volt, int_volt);
|
||||
}
|
||||
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
|
||||
|
||||
out:
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
return err;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
/*
|
||||
* These suspend/resume are used as syscore_ops, it is already too
|
||||
* late to set regulator voltages at this stage.
|
||||
*/
|
||||
static int exynos4_cpufreq_suspend(struct cpufreq_policy *policy)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int exynos4_cpufreq_resume(struct cpufreq_policy *policy)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
* exynos4_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume
|
||||
* context
|
||||
* @notifier
|
||||
* @pm_event
|
||||
* @v
|
||||
*
|
||||
* While frequency_locked == true, target() ignores every frequency but
|
||||
* locking_frequency. The locking_frequency value is the initial frequency,
|
||||
* which is set by the bootloader. In order to eliminate possible
|
||||
* inconsistency in clock values, we save and restore frequencies during
|
||||
* suspend and resume and block CPUFREQ activities. Note that the standard
|
||||
* suspend/resume cannot be used as they are too deep (syscore_ops) for
|
||||
* regulator actions.
|
||||
*/
|
||||
static int exynos4_cpufreq_pm_notifier(struct notifier_block *notifier,
|
||||
unsigned long pm_event, void *v)
|
||||
{
|
||||
struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */
|
||||
static unsigned int saved_frequency;
|
||||
unsigned int temp;
|
||||
|
||||
mutex_lock(&cpufreq_lock);
|
||||
switch (pm_event) {
|
||||
case PM_SUSPEND_PREPARE:
|
||||
if (frequency_locked)
|
||||
goto out;
|
||||
frequency_locked = true;
|
||||
|
||||
if (locking_frequency) {
|
||||
saved_frequency = exynos4_getspeed(0);
|
||||
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
exynos4_target(policy, locking_frequency,
|
||||
CPUFREQ_RELATION_H);
|
||||
mutex_lock(&cpufreq_lock);
|
||||
}
|
||||
|
||||
break;
|
||||
case PM_POST_SUSPEND:
|
||||
|
||||
if (saved_frequency) {
|
||||
/*
|
||||
* While frequency_locked, only locking_frequency
|
||||
* is valid for target(). In order to use
|
||||
* saved_frequency while keeping frequency_locked,
|
||||
* we temporarly overwrite locking_frequency.
|
||||
*/
|
||||
temp = locking_frequency;
|
||||
locking_frequency = saved_frequency;
|
||||
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
exynos4_target(policy, locking_frequency,
|
||||
CPUFREQ_RELATION_H);
|
||||
mutex_lock(&cpufreq_lock);
|
||||
|
||||
locking_frequency = temp;
|
||||
}
|
||||
|
||||
frequency_locked = false;
|
||||
break;
|
||||
}
|
||||
out:
|
||||
mutex_unlock(&cpufreq_lock);
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static struct notifier_block exynos4_cpufreq_nb = {
|
||||
.notifier_call = exynos4_cpufreq_pm_notifier,
|
||||
};
|
||||
|
||||
static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy)
|
||||
{
|
||||
int ret;
|
||||
|
||||
policy->cur = policy->min = policy->max = exynos4_getspeed(policy->cpu);
|
||||
|
||||
cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
|
||||
|
||||
/* set the transition latency value */
|
||||
policy->cpuinfo.transition_latency = 100000;
|
||||
|
||||
/*
|
||||
* EXYNOS4 multi-core processors has 2 cores
|
||||
* that the frequency cannot be set independently.
|
||||
* Each cpu is bound to the same speed.
|
||||
* So the affected cpu is all of the cpus.
|
||||
*/
|
||||
cpumask_setall(policy->cpus);
|
||||
|
||||
ret = cpufreq_frequency_table_cpuinfo(policy, exynos4_freq_table);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int exynos4_cpufreq_cpu_exit(struct cpufreq_policy *policy)
|
||||
{
|
||||
cpufreq_frequency_table_put_attr(policy->cpu);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct freq_attr *exynos4_cpufreq_attr[] = {
|
||||
&cpufreq_freq_attr_scaling_available_freqs,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct cpufreq_driver exynos4_driver = {
|
||||
.flags = CPUFREQ_STICKY,
|
||||
.verify = exynos4_verify_speed,
|
||||
.target = exynos4_target,
|
||||
.get = exynos4_getspeed,
|
||||
.init = exynos4_cpufreq_cpu_init,
|
||||
.exit = exynos4_cpufreq_cpu_exit,
|
||||
.name = "exynos4_cpufreq",
|
||||
.attr = exynos4_cpufreq_attr,
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = exynos4_cpufreq_suspend,
|
||||
.resume = exynos4_cpufreq_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int __init exynos4_cpufreq_init(void)
|
||||
{
|
||||
cpu_clk = clk_get(NULL, "armclk");
|
||||
if (IS_ERR(cpu_clk))
|
||||
return PTR_ERR(cpu_clk);
|
||||
|
||||
locking_frequency = exynos4_getspeed(0);
|
||||
|
||||
moutcore = clk_get(NULL, "moutcore");
|
||||
if (IS_ERR(moutcore))
|
||||
goto out;
|
||||
goto err_moutcore;
|
||||
|
||||
mout_mpll = clk_get(NULL, "mout_mpll");
|
||||
if (IS_ERR(mout_mpll))
|
||||
goto out;
|
||||
goto err_mout_mpll;
|
||||
|
||||
rate = clk_get_rate(mout_mpll) / 1000;
|
||||
|
||||
mout_apll = clk_get(NULL, "mout_apll");
|
||||
if (IS_ERR(mout_apll))
|
||||
goto out;
|
||||
goto err_mout_apll;
|
||||
|
||||
arm_regulator = regulator_get(NULL, "vdd_arm");
|
||||
if (IS_ERR(arm_regulator)) {
|
||||
printk(KERN_ERR "failed to get resource %s\n", "vdd_arm");
|
||||
goto out;
|
||||
tmp = __raw_readl(S5P_CLKDIV_CPU);
|
||||
|
||||
for (i = L0; i < CPUFREQ_LEVEL_END; i++) {
|
||||
tmp &= ~(S5P_CLKDIV_CPU0_CORE_MASK |
|
||||
S5P_CLKDIV_CPU0_COREM0_MASK |
|
||||
S5P_CLKDIV_CPU0_COREM1_MASK |
|
||||
S5P_CLKDIV_CPU0_PERIPH_MASK |
|
||||
S5P_CLKDIV_CPU0_ATB_MASK |
|
||||
S5P_CLKDIV_CPU0_PCLKDBG_MASK |
|
||||
S5P_CLKDIV_CPU0_APLL_MASK);
|
||||
|
||||
tmp |= ((clkdiv_cpu0[i][0] << S5P_CLKDIV_CPU0_CORE_SHIFT) |
|
||||
(clkdiv_cpu0[i][1] << S5P_CLKDIV_CPU0_COREM0_SHIFT) |
|
||||
(clkdiv_cpu0[i][2] << S5P_CLKDIV_CPU0_COREM1_SHIFT) |
|
||||
(clkdiv_cpu0[i][3] << S5P_CLKDIV_CPU0_PERIPH_SHIFT) |
|
||||
(clkdiv_cpu0[i][4] << S5P_CLKDIV_CPU0_ATB_SHIFT) |
|
||||
(clkdiv_cpu0[i][5] << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT) |
|
||||
(clkdiv_cpu0[i][6] << S5P_CLKDIV_CPU0_APLL_SHIFT));
|
||||
|
||||
exynos4210_clkdiv_table[i].clkdiv = tmp;
|
||||
}
|
||||
|
||||
int_regulator = regulator_get(NULL, "vdd_int");
|
||||
if (IS_ERR(int_regulator)) {
|
||||
printk(KERN_ERR "failed to get resource %s\n", "vdd_int");
|
||||
goto out;
|
||||
}
|
||||
info->mpll_freq_khz = rate;
|
||||
info->pm_lock_idx = L2;
|
||||
info->pll_safe_idx = L2;
|
||||
info->max_support_idx = max_support_idx;
|
||||
info->min_support_idx = min_support_idx;
|
||||
info->cpu_clk = cpu_clk;
|
||||
info->volt_table = exynos4210_volt_table;
|
||||
info->freq_table = exynos4210_freq_table;
|
||||
info->set_freq = exynos4210_set_frequency;
|
||||
info->need_apll_change = exynos4210_pms_change;
|
||||
|
||||
/*
|
||||
* Check DRAM type.
|
||||
* Because DVFS level is different according to DRAM type.
|
||||
*/
|
||||
memtype = __raw_readl(S5P_VA_DMC0 + S5P_DMC0_MEMCON_OFFSET);
|
||||
memtype = (memtype >> S5P_DMC0_MEMTYPE_SHIFT);
|
||||
memtype &= S5P_DMC0_MEMTYPE_MASK;
|
||||
return 0;
|
||||
|
||||
if ((memtype < DDR2) && (memtype > DDR3)) {
|
||||
printk(KERN_ERR "%s: wrong memtype= 0x%x\n", __func__, memtype);
|
||||
goto out;
|
||||
} else {
|
||||
printk(KERN_DEBUG "%s: memtype= 0x%x\n", __func__, memtype);
|
||||
}
|
||||
|
||||
register_pm_notifier(&exynos4_cpufreq_nb);
|
||||
|
||||
return cpufreq_register_driver(&exynos4_driver);
|
||||
|
||||
out:
|
||||
err_mout_apll:
|
||||
if (!IS_ERR(mout_mpll))
|
||||
clk_put(mout_mpll);
|
||||
err_mout_mpll:
|
||||
if (!IS_ERR(moutcore))
|
||||
clk_put(moutcore);
|
||||
err_moutcore:
|
||||
if (!IS_ERR(cpu_clk))
|
||||
clk_put(cpu_clk);
|
||||
|
||||
if (!IS_ERR(moutcore))
|
||||
clk_put(moutcore);
|
||||
|
||||
if (!IS_ERR(mout_mpll))
|
||||
clk_put(mout_mpll);
|
||||
|
||||
if (!IS_ERR(mout_apll))
|
||||
clk_put(mout_apll);
|
||||
|
||||
if (!IS_ERR(arm_regulator))
|
||||
regulator_put(arm_regulator);
|
||||
|
||||
if (!IS_ERR(int_regulator))
|
||||
regulator_put(int_regulator);
|
||||
|
||||
printk(KERN_ERR "%s: failed initialization\n", __func__);
|
||||
|
||||
pr_debug("%s: failed initialization\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
late_initcall(exynos4_cpufreq_init);
|
||||
EXPORT_SYMBOL(exynos4210_cpufreq_init);
|
||||
|
|
|
|||
|
|
@ -0,0 +1,274 @@
|
|||
/*
|
||||
* CPU frequency scaling for OMAP using OPP information
|
||||
*
|
||||
* Copyright (C) 2005 Nokia Corporation
|
||||
* Written by Tony Lindgren <tony@atomide.com>
|
||||
*
|
||||
* Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
|
||||
*
|
||||
* Copyright (C) 2007-2011 Texas Instruments, Inc.
|
||||
* - OMAP3/4 support by Rajendra Nayak, Santosh Shilimkar
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
#include <linux/types.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/cpufreq.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/opp.h>
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
#include <asm/system.h>
|
||||
#include <asm/smp_plat.h>
|
||||
#include <asm/cpu.h>
|
||||
|
||||
#include <plat/clock.h>
|
||||
#include <plat/omap-pm.h>
|
||||
#include <plat/common.h>
|
||||
#include <plat/omap_device.h>
|
||||
|
||||
#include <mach/hardware.h>
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
struct lpj_info {
|
||||
unsigned long ref;
|
||||
unsigned int freq;
|
||||
};
|
||||
|
||||
static DEFINE_PER_CPU(struct lpj_info, lpj_ref);
|
||||
static struct lpj_info global_lpj_ref;
|
||||
#endif
|
||||
|
||||
static struct cpufreq_frequency_table *freq_table;
|
||||
static atomic_t freq_table_users = ATOMIC_INIT(0);
|
||||
static struct clk *mpu_clk;
|
||||
static char *mpu_clk_name;
|
||||
static struct device *mpu_dev;
|
||||
|
||||
static int omap_verify_speed(struct cpufreq_policy *policy)
|
||||
{
|
||||
if (!freq_table)
|
||||
return -EINVAL;
|
||||
return cpufreq_frequency_table_verify(policy, freq_table);
|
||||
}
|
||||
|
||||
static unsigned int omap_getspeed(unsigned int cpu)
|
||||
{
|
||||
unsigned long rate;
|
||||
|
||||
if (cpu >= NR_CPUS)
|
||||
return 0;
|
||||
|
||||
rate = clk_get_rate(mpu_clk) / 1000;
|
||||
return rate;
|
||||
}
|
||||
|
||||
static int omap_target(struct cpufreq_policy *policy,
|
||||
unsigned int target_freq,
|
||||
unsigned int relation)
|
||||
{
|
||||
unsigned int i;
|
||||
int ret = 0;
|
||||
struct cpufreq_freqs freqs;
|
||||
|
||||
if (!freq_table) {
|
||||
dev_err(mpu_dev, "%s: cpu%d: no freq table!\n", __func__,
|
||||
policy->cpu);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = cpufreq_frequency_table_target(policy, freq_table, target_freq,
|
||||
relation, &i);
|
||||
if (ret) {
|
||||
dev_dbg(mpu_dev, "%s: cpu%d: no freq match for %d(ret=%d)\n",
|
||||
__func__, policy->cpu, target_freq, ret);
|
||||
return ret;
|
||||
}
|
||||
freqs.new = freq_table[i].frequency;
|
||||
if (!freqs.new) {
|
||||
dev_err(mpu_dev, "%s: cpu%d: no match for freq %d\n", __func__,
|
||||
policy->cpu, target_freq);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
freqs.old = omap_getspeed(policy->cpu);
|
||||
freqs.cpu = policy->cpu;
|
||||
|
||||
if (freqs.old == freqs.new && policy->cur == freqs.new)
|
||||
return ret;
|
||||
|
||||
/* notifiers */
|
||||
for_each_cpu(i, policy->cpus) {
|
||||
freqs.cpu = i;
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CPU_FREQ_DEBUG
|
||||
pr_info("cpufreq-omap: transition: %u --> %u\n", freqs.old, freqs.new);
|
||||
#endif
|
||||
|
||||
ret = clk_set_rate(mpu_clk, freqs.new * 1000);
|
||||
freqs.new = omap_getspeed(policy->cpu);
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/*
|
||||
* Note that loops_per_jiffy is not updated on SMP systems in
|
||||
* cpufreq driver. So, update the per-CPU loops_per_jiffy value
|
||||
* on frequency transition. We need to update all dependent CPUs.
|
||||
*/
|
||||
for_each_cpu(i, policy->cpus) {
|
||||
struct lpj_info *lpj = &per_cpu(lpj_ref, i);
|
||||
if (!lpj->freq) {
|
||||
lpj->ref = per_cpu(cpu_data, i).loops_per_jiffy;
|
||||
lpj->freq = freqs.old;
|
||||
}
|
||||
|
||||
per_cpu(cpu_data, i).loops_per_jiffy =
|
||||
cpufreq_scale(lpj->ref, lpj->freq, freqs.new);
|
||||
}
|
||||
|
||||
/* And don't forget to adjust the global one */
|
||||
if (!global_lpj_ref.freq) {
|
||||
global_lpj_ref.ref = loops_per_jiffy;
|
||||
global_lpj_ref.freq = freqs.old;
|
||||
}
|
||||
loops_per_jiffy = cpufreq_scale(global_lpj_ref.ref, global_lpj_ref.freq,
|
||||
freqs.new);
|
||||
#endif
|
||||
|
||||
/* notifiers */
|
||||
for_each_cpu(i, policy->cpus) {
|
||||
freqs.cpu = i;
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline void freq_table_free(void)
|
||||
{
|
||||
if (atomic_dec_and_test(&freq_table_users))
|
||||
opp_free_cpufreq_table(mpu_dev, &freq_table);
|
||||
}
|
||||
|
||||
static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
|
||||
{
|
||||
int result = 0;
|
||||
|
||||
mpu_clk = clk_get(NULL, mpu_clk_name);
|
||||
if (IS_ERR(mpu_clk))
|
||||
return PTR_ERR(mpu_clk);
|
||||
|
||||
if (policy->cpu >= NR_CPUS) {
|
||||
result = -EINVAL;
|
||||
goto fail_ck;
|
||||
}
|
||||
|
||||
policy->cur = policy->min = policy->max = omap_getspeed(policy->cpu);
|
||||
|
||||
if (atomic_inc_return(&freq_table_users) == 1)
|
||||
result = opp_init_cpufreq_table(mpu_dev, &freq_table);
|
||||
|
||||
if (result) {
|
||||
dev_err(mpu_dev, "%s: cpu%d: failed creating freq table[%d]\n",
|
||||
__func__, policy->cpu, result);
|
||||
goto fail_ck;
|
||||
}
|
||||
|
||||
result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
|
||||
if (result)
|
||||
goto fail_table;
|
||||
|
||||
cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
|
||||
|
||||
policy->min = policy->cpuinfo.min_freq;
|
||||
policy->max = policy->cpuinfo.max_freq;
|
||||
policy->cur = omap_getspeed(policy->cpu);
|
||||
|
||||
/*
|
||||
* On OMAP SMP configuartion, both processors share the voltage
|
||||
* and clock. So both CPUs needs to be scaled together and hence
|
||||
* needs software co-ordination. Use cpufreq affected_cpus
|
||||
* interface to handle this scenario. Additional is_smp() check
|
||||
* is to keep SMP_ON_UP build working.
|
||||
*/
|
||||
if (is_smp()) {
|
||||
policy->shared_type = CPUFREQ_SHARED_TYPE_ANY;
|
||||
cpumask_setall(policy->cpus);
|
||||
}
|
||||
|
||||
/* FIXME: what's the actual transition time? */
|
||||
policy->cpuinfo.transition_latency = 300 * 1000;
|
||||
|
||||
return 0;
|
||||
|
||||
fail_table:
|
||||
freq_table_free();
|
||||
fail_ck:
|
||||
clk_put(mpu_clk);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int omap_cpu_exit(struct cpufreq_policy *policy)
|
||||
{
|
||||
freq_table_free();
|
||||
clk_put(mpu_clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct freq_attr *omap_cpufreq_attr[] = {
|
||||
&cpufreq_freq_attr_scaling_available_freqs,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct cpufreq_driver omap_driver = {
|
||||
.flags = CPUFREQ_STICKY,
|
||||
.verify = omap_verify_speed,
|
||||
.target = omap_target,
|
||||
.get = omap_getspeed,
|
||||
.init = omap_cpu_init,
|
||||
.exit = omap_cpu_exit,
|
||||
.name = "omap",
|
||||
.attr = omap_cpufreq_attr,
|
||||
};
|
||||
|
||||
static int __init omap_cpufreq_init(void)
|
||||
{
|
||||
if (cpu_is_omap24xx())
|
||||
mpu_clk_name = "virt_prcm_set";
|
||||
else if (cpu_is_omap34xx())
|
||||
mpu_clk_name = "dpll1_ck";
|
||||
else if (cpu_is_omap44xx())
|
||||
mpu_clk_name = "dpll_mpu_ck";
|
||||
|
||||
if (!mpu_clk_name) {
|
||||
pr_err("%s: unsupported Silicon?\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mpu_dev = omap_device_get_by_hwmod_name("mpu");
|
||||
if (!mpu_dev) {
|
||||
pr_warning("%s: unable to get the mpu device\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return cpufreq_register_driver(&omap_driver);
|
||||
}
|
||||
|
||||
static void __exit omap_cpufreq_exit(void)
|
||||
{
|
||||
cpufreq_unregister_driver(&omap_driver);
|
||||
}
|
||||
|
||||
MODULE_DESCRIPTION("cpufreq driver for OMAP SoCs");
|
||||
MODULE_LICENSE("GPL");
|
||||
module_init(omap_cpufreq_init);
|
||||
module_exit(omap_cpufreq_exit);
|
||||
|
|
@ -1,10 +1,11 @@
|
|||
/*
|
||||
* (c) 2003-2010 Advanced Micro Devices, Inc.
|
||||
* (c) 2003-2012 Advanced Micro Devices, Inc.
|
||||
* Your use of this code is subject to the terms and conditions of the
|
||||
* GNU general public license version 2. See "COPYING" or
|
||||
* http://www.gnu.org/licenses/gpl.html
|
||||
*
|
||||
* Support : mark.langsdorf@amd.com
|
||||
* Maintainer:
|
||||
* Andreas Herrmann <andreas.herrmann3@amd.com>
|
||||
*
|
||||
* Based on the powernow-k7.c module written by Dave Jones.
|
||||
* (C) 2003 Dave Jones on behalf of SuSE Labs
|
||||
|
|
@ -16,12 +17,14 @@
|
|||
* Valuable input gratefully received from Dave Jones, Pavel Machek,
|
||||
* Dominik Brodowski, Jacob Shin, and others.
|
||||
* Originally developed by Paul Devriendt.
|
||||
* Processor information obtained from Chapter 9 (Power and Thermal Management)
|
||||
* of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
|
||||
* Opteron Processors" available for download from www.amd.com
|
||||
*
|
||||
* Tables for specific CPUs can be inferred from
|
||||
* http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
|
||||
* Processor information obtained from Chapter 9 (Power and Thermal
|
||||
* Management) of the "BIOS and Kernel Developer's Guide (BKDG) for
|
||||
* the AMD Athlon 64 and AMD Opteron Processors" and section "2.x
|
||||
* Power Management" in BKDGs for newer AMD CPU families.
|
||||
*
|
||||
* Tables for specific CPUs can be inferred from AMD's processor
|
||||
* power and thermal data sheets, (e.g. 30417.pdf, 30430.pdf, 43375.pdf)
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
|
|
@ -54,6 +57,9 @@ static DEFINE_PER_CPU(struct powernow_k8_data *, powernow_data);
|
|||
|
||||
static int cpu_family = CPU_OPTERON;
|
||||
|
||||
/* array to map SW pstate number to acpi state */
|
||||
static u32 ps_to_as[8];
|
||||
|
||||
/* core performance boost */
|
||||
static bool cpb_capable, cpb_enabled;
|
||||
static struct msr __percpu *msrs;
|
||||
|
|
@ -80,9 +86,9 @@ static u32 find_khz_freq_from_fid(u32 fid)
|
|||
}
|
||||
|
||||
static u32 find_khz_freq_from_pstate(struct cpufreq_frequency_table *data,
|
||||
u32 pstate)
|
||||
u32 pstate)
|
||||
{
|
||||
return data[pstate].frequency;
|
||||
return data[ps_to_as[pstate]].frequency;
|
||||
}
|
||||
|
||||
/* Return the vco fid for an input fid
|
||||
|
|
@ -926,23 +932,27 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data,
|
|||
invalidate_entry(powernow_table, i);
|
||||
continue;
|
||||
}
|
||||
rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
|
||||
if (!(hi & HW_PSTATE_VALID_MASK)) {
|
||||
pr_debug("invalid pstate %d, ignoring\n", index);
|
||||
invalidate_entry(powernow_table, i);
|
||||
continue;
|
||||
}
|
||||
|
||||
powernow_table[i].index = index;
|
||||
ps_to_as[index] = i;
|
||||
|
||||
/* Frequency may be rounded for these */
|
||||
if ((boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model < 10)
|
||||
|| boot_cpu_data.x86 == 0x11) {
|
||||
|
||||
rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
|
||||
if (!(hi & HW_PSTATE_VALID_MASK)) {
|
||||
pr_debug("invalid pstate %d, ignoring\n", index);
|
||||
invalidate_entry(powernow_table, i);
|
||||
continue;
|
||||
}
|
||||
|
||||
powernow_table[i].frequency =
|
||||
freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
|
||||
} else
|
||||
powernow_table[i].frequency =
|
||||
data->acpi_data.states[i].core_frequency * 1000;
|
||||
|
||||
powernow_table[i].index = index;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1189,7 +1199,8 @@ static int powernowk8_target(struct cpufreq_policy *pol,
|
|||
powernow_k8_acpi_pst_values(data, newstate);
|
||||
|
||||
if (cpu_family == CPU_HW_PSTATE)
|
||||
ret = transition_frequency_pstate(data, newstate);
|
||||
ret = transition_frequency_pstate(data,
|
||||
data->powernow_table[newstate].index);
|
||||
else
|
||||
ret = transition_frequency_fidvid(data, newstate);
|
||||
if (ret) {
|
||||
|
|
@ -1202,7 +1213,7 @@ static int powernowk8_target(struct cpufreq_policy *pol,
|
|||
|
||||
if (cpu_family == CPU_HW_PSTATE)
|
||||
pol->cur = find_khz_freq_from_pstate(data->powernow_table,
|
||||
newstate);
|
||||
data->powernow_table[newstate].index);
|
||||
else
|
||||
pol->cur = find_khz_freq_from_fid(data->currfid);
|
||||
ret = 0;
|
||||
|
|
|
|||
|
|
@ -8,6 +8,8 @@
|
|||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) "cpufreq: " fmt
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/init.h>
|
||||
|
|
@ -91,7 +93,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
|
|||
if (freqs.old == freqs.new)
|
||||
return 0;
|
||||
|
||||
pr_debug("cpufreq: Transition %d-%dkHz\n", freqs.old, freqs.new);
|
||||
pr_debug("Transition %d-%dkHz\n", freqs.old, freqs.new);
|
||||
|
||||
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
||||
|
||||
|
|
@ -101,7 +103,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
|
|||
dvfs->vddarm_min,
|
||||
dvfs->vddarm_max);
|
||||
if (ret != 0) {
|
||||
pr_err("cpufreq: Failed to set VDDARM for %dkHz: %d\n",
|
||||
pr_err("Failed to set VDDARM for %dkHz: %d\n",
|
||||
freqs.new, ret);
|
||||
goto err;
|
||||
}
|
||||
|
|
@ -110,7 +112,7 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
|
|||
|
||||
ret = clk_set_rate(armclk, freqs.new * 1000);
|
||||
if (ret < 0) {
|
||||
pr_err("cpufreq: Failed to set rate %dkHz: %d\n",
|
||||
pr_err("Failed to set rate %dkHz: %d\n",
|
||||
freqs.new, ret);
|
||||
goto err;
|
||||
}
|
||||
|
|
@ -123,14 +125,14 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
|
|||
dvfs->vddarm_min,
|
||||
dvfs->vddarm_max);
|
||||
if (ret != 0) {
|
||||
pr_err("cpufreq: Failed to set VDDARM for %dkHz: %d\n",
|
||||
pr_err("Failed to set VDDARM for %dkHz: %d\n",
|
||||
freqs.new, ret);
|
||||
goto err_clk;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
pr_debug("cpufreq: Set actual frequency %lukHz\n",
|
||||
pr_debug("Set actual frequency %lukHz\n",
|
||||
clk_get_rate(armclk) / 1000);
|
||||
|
||||
return 0;
|
||||
|
|
@ -153,7 +155,7 @@ static void __init s3c64xx_cpufreq_config_regulator(void)
|
|||
|
||||
count = regulator_count_voltages(vddarm);
|
||||
if (count < 0) {
|
||||
pr_err("cpufreq: Unable to check supported voltages\n");
|
||||
pr_err("Unable to check supported voltages\n");
|
||||
}
|
||||
|
||||
freq = s3c64xx_freq_table;
|
||||
|
|
@ -171,7 +173,7 @@ static void __init s3c64xx_cpufreq_config_regulator(void)
|
|||
}
|
||||
|
||||
if (!found) {
|
||||
pr_debug("cpufreq: %dkHz unsupported by regulator\n",
|
||||
pr_debug("%dkHz unsupported by regulator\n",
|
||||
freq->frequency);
|
||||
freq->frequency = CPUFREQ_ENTRY_INVALID;
|
||||
}
|
||||
|
|
@ -194,13 +196,13 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
|
|||
return -EINVAL;
|
||||
|
||||
if (s3c64xx_freq_table == NULL) {
|
||||
pr_err("cpufreq: No frequency information for this CPU\n");
|
||||
pr_err("No frequency information for this CPU\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
armclk = clk_get(NULL, "armclk");
|
||||
if (IS_ERR(armclk)) {
|
||||
pr_err("cpufreq: Unable to obtain ARMCLK: %ld\n",
|
||||
pr_err("Unable to obtain ARMCLK: %ld\n",
|
||||
PTR_ERR(armclk));
|
||||
return PTR_ERR(armclk);
|
||||
}
|
||||
|
|
@ -209,12 +211,19 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
|
|||
vddarm = regulator_get(NULL, "vddarm");
|
||||
if (IS_ERR(vddarm)) {
|
||||
ret = PTR_ERR(vddarm);
|
||||
pr_err("cpufreq: Failed to obtain VDDARM: %d\n", ret);
|
||||
pr_err("cpufreq: Only frequency scaling available\n");
|
||||
pr_err("Failed to obtain VDDARM: %d\n", ret);
|
||||
pr_err("Only frequency scaling available\n");
|
||||
vddarm = NULL;
|
||||
} else {
|
||||
s3c64xx_cpufreq_config_regulator();
|
||||
}
|
||||
|
||||
vddint = regulator_get(NULL, "vddint");
|
||||
if (IS_ERR(vddint)) {
|
||||
ret = PTR_ERR(vddint);
|
||||
pr_err("Failed to obtain VDDINT: %d\n", ret);
|
||||
vddint = NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
freq = s3c64xx_freq_table;
|
||||
|
|
@ -225,7 +234,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
|
|||
r = clk_round_rate(armclk, freq->frequency * 1000);
|
||||
r /= 1000;
|
||||
if (r != freq->frequency) {
|
||||
pr_debug("cpufreq: %dkHz unsupported by clock\n",
|
||||
pr_debug("%dkHz unsupported by clock\n",
|
||||
freq->frequency);
|
||||
freq->frequency = CPUFREQ_ENTRY_INVALID;
|
||||
}
|
||||
|
|
@ -248,7 +257,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
|
|||
|
||||
ret = cpufreq_frequency_table_cpuinfo(policy, s3c64xx_freq_table);
|
||||
if (ret != 0) {
|
||||
pr_err("cpufreq: Failed to configure frequency table: %d\n",
|
||||
pr_err("Failed to configure frequency table: %d\n",
|
||||
ret);
|
||||
regulator_put(vddarm);
|
||||
clk_put(armclk);
|
||||
|
|
|
|||
Reference in New Issue