diff options
Diffstat (limited to 'arch/arm/plat-omap/cpu-omap.c')
| -rw-r--r-- | arch/arm/plat-omap/cpu-omap.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c deleted file mode 100644 index fd894bb0010..00000000000 --- a/arch/arm/plat-omap/cpu-omap.c +++ /dev/null @@ -1,127 +0,0 @@ -/* - * linux/arch/arm/plat-omap/cpu-omap.c - * - * CPU frequency scaling for OMAP - * - * Copyright (C) 2005 Nokia Corporation - * Written by Tony Lindgren <tony@atomide.com> - * - * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King - * - * 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 <asm/hardware.h> -#include <asm/io.h> -#include <asm/system.h> - -#include <asm/hardware/clock.h> - -/* TODO: Add support for SDRAM timing changes */ - -int omap_verify_speed(struct cpufreq_policy *policy) -{ - struct clk * mpu_clk; - - if (policy->cpu) - return -EINVAL; - - cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, - policy->cpuinfo.max_freq); - mpu_clk = clk_get(NULL, "mpu"); - if (IS_ERR(mpu_clk)) - return PTR_ERR(mpu_clk); - policy->min = clk_round_rate(mpu_clk, policy->min * 1000) / 1000; - policy->max = clk_round_rate(mpu_clk, policy->max * 1000) / 1000; - cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, - policy->cpuinfo.max_freq); - clk_put(mpu_clk); - - return 0; -} - -unsigned int omap_getspeed(unsigned int cpu) -{ - struct clk * mpu_clk; - unsigned long rate; - - if (cpu) - return 0; - - mpu_clk = clk_get(NULL, "mpu"); - if (IS_ERR(mpu_clk)) - return 0; - rate = clk_get_rate(mpu_clk) / 1000; - clk_put(mpu_clk); - - return rate; -} - -static int omap_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) -{ - struct clk * mpu_clk; - struct cpufreq_freqs freqs; - int ret = 0; - - mpu_clk = clk_get(NULL, "mpu"); - if (IS_ERR(mpu_clk)) - return PTR_ERR(mpu_clk); - - freqs.old = omap_getspeed(0); - freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000; - freqs.cpu = 0; - - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - ret = clk_set_rate(mpu_clk, target_freq * 1000); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - clk_put(mpu_clk); - - return ret; -} - -static int __init omap_cpu_init(struct cpufreq_policy *policy) -{ - struct clk * mpu_clk; - - mpu_clk = clk_get(NULL, "mpu"); - if (IS_ERR(mpu_clk)) - return PTR_ERR(mpu_clk); - - if (policy->cpu != 0) - return -EINVAL; - policy->cur = policy->min = policy->max = omap_getspeed(0); - policy->governor = CPUFREQ_DEFAULT_GOVERNOR; - policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000; - policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, 216000000) / 1000; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; - clk_put(mpu_clk); - - return 0; -} - -static struct cpufreq_driver omap_driver = { - .flags = CPUFREQ_STICKY, - .verify = omap_verify_speed, - .target = omap_target, - .get = omap_getspeed, - .init = omap_cpu_init, - .name = "omap", -}; - -static int __init omap_cpufreq_init(void) -{ - return cpufreq_register_driver(&omap_driver); -} - -arch_initcall(omap_cpufreq_init); |
