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-rw-r--r--arch/blackfin/mach-common/Makefile1
-rw-r--r--arch/blackfin/mach-common/cpufreq.c258
2 files changed, 0 insertions, 259 deletions
diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile
index 75f0ba29ebb..675466d490d 100644
--- a/arch/blackfin/mach-common/Makefile
+++ b/arch/blackfin/mach-common/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_PM) += pm.o
ifneq ($(CONFIG_BF60x),y)
obj-$(CONFIG_PM) += dpmc_modes.o
endif
-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_BFIN_KERNEL_CLOCK) += clocks-init.o
diff --git a/arch/blackfin/mach-common/cpufreq.c b/arch/blackfin/mach-common/cpufreq.c
deleted file mode 100644
index d88bd31319e..00000000000
--- a/arch/blackfin/mach-common/cpufreq.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Blackfin core clock scaling
- *
- * Copyright 2008-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/clk.h>
-#include <linux/cpufreq.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <asm/blackfin.h>
-#include <asm/time.h>
-#include <asm/dpmc.h>
-
-
-/* this is the table of CCLK frequencies, in Hz */
-/* .index is the entry in the auxiliary dpm_state_table[] */
-static struct cpufreq_frequency_table bfin_freq_table[] = {
- {
- .frequency = CPUFREQ_TABLE_END,
- .index = 0,
- },
- {
- .frequency = CPUFREQ_TABLE_END,
- .index = 1,
- },
- {
- .frequency = CPUFREQ_TABLE_END,
- .index = 2,
- },
- {
- .frequency = CPUFREQ_TABLE_END,
- .index = 0,
- },
-};
-
-static struct bfin_dpm_state {
- unsigned int csel; /* system clock divider */
- unsigned int tscale; /* change the divider on the core timer interrupt */
-} dpm_state_table[3];
-
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
-/*
- * normalized to maximum frequency offset for CYCLES,
- * used in time-ts cycles clock source, but could be used
- * somewhere also.
- */
-unsigned long long __bfin_cycles_off;
-unsigned int __bfin_cycles_mod;
-#endif
-
-/**************************************************************************/
-static void __init bfin_init_tables(unsigned long cclk, unsigned long sclk)
-{
-
- unsigned long csel, min_cclk;
- int index;
-
- /* Anomaly 273 seems to still exist on non-BF54x w/dcache turned on */
-#if ANOMALY_05000273 || ANOMALY_05000274 || \
- (!(defined(CONFIG_BF54x) || defined(CONFIG_BF60x)) \
- && defined(CONFIG_BFIN_EXTMEM_DCACHEABLE))
- min_cclk = sclk * 2;
-#else
- min_cclk = sclk;
-#endif
-
-#ifndef CONFIG_BF60x
- csel = ((bfin_read_PLL_DIV() & CSEL) >> 4);
-#else
- csel = bfin_read32(CGU0_DIV) & 0x1F;
-#endif
-
- for (index = 0; (cclk >> index) >= min_cclk && csel <= 3 && index < 3; index++, csel++) {
- bfin_freq_table[index].frequency = cclk >> index;
-#ifndef CONFIG_BF60x
- dpm_state_table[index].csel = csel << 4; /* Shift now into PLL_DIV bitpos */
-#else
- dpm_state_table[index].csel = csel;
-#endif
- dpm_state_table[index].tscale = (TIME_SCALE >> index) - 1;
-
- pr_debug("cpufreq: freq:%d csel:0x%x tscale:%d\n",
- bfin_freq_table[index].frequency,
- dpm_state_table[index].csel,
- dpm_state_table[index].tscale);
- }
- return;
-}
-
-static void bfin_adjust_core_timer(void *info)
-{
- unsigned int tscale;
- unsigned int index = *(unsigned int *)info;
-
- /* we have to adjust the core timer, because it is using cclk */
- tscale = dpm_state_table[index].tscale;
- bfin_write_TSCALE(tscale);
- return;
-}
-
-static unsigned int bfin_getfreq_khz(unsigned int cpu)
-{
- /* Both CoreA/B have the same core clock */
- return get_cclk() / 1000;
-}
-
-#ifdef CONFIG_BF60x
-unsigned long cpu_set_cclk(int cpu, unsigned long new)
-{
- struct clk *clk;
- int ret;
-
- clk = clk_get(NULL, "CCLK");
- if (IS_ERR(clk))
- return -ENODEV;
-
- ret = clk_set_rate(clk, new);
- clk_put(clk);
- return ret;
-}
-#endif
-
-static int bfin_target(struct cpufreq_policy *poli,
- unsigned int target_freq, unsigned int relation)
-{
-#ifndef CONFIG_BF60x
- unsigned int plldiv;
-#endif
- unsigned int index, cpu;
- unsigned long cclk_hz;
- struct cpufreq_freqs freqs;
- static unsigned long lpj_ref;
- static unsigned int lpj_ref_freq;
- int ret = 0;
-
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
- cycles_t cycles;
-#endif
-
- for_each_online_cpu(cpu) {
- struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-
- if (!policy)
- continue;
-
- if (cpufreq_frequency_table_target(policy, bfin_freq_table,
- target_freq, relation, &index))
- return -EINVAL;
-
- cclk_hz = bfin_freq_table[index].frequency;
-
- freqs.old = bfin_getfreq_khz(0);
- freqs.new = cclk_hz;
- freqs.cpu = cpu;
-
- pr_debug("cpufreq: changing cclk to %lu; target = %u, oldfreq = %u\n",
- cclk_hz, target_freq, freqs.old);
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
- if (cpu == CPUFREQ_CPU) {
-#ifndef CONFIG_BF60x
- plldiv = (bfin_read_PLL_DIV() & SSEL) |
- dpm_state_table[index].csel;
- bfin_write_PLL_DIV(plldiv);
-#else
- ret = cpu_set_cclk(cpu, freqs.new * 1000);
- if (ret != 0) {
- WARN_ONCE(ret, "cpufreq set freq failed %d\n", ret);
- break;
- }
-#endif
- on_each_cpu(bfin_adjust_core_timer, &index, 1);
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
- cycles = get_cycles();
- SSYNC();
- cycles += 10; /* ~10 cycles we lose after get_cycles() */
- __bfin_cycles_off +=
- (cycles << __bfin_cycles_mod) - (cycles << index);
- __bfin_cycles_mod = index;
-#endif
- if (!lpj_ref_freq) {
- lpj_ref = loops_per_jiffy;
- lpj_ref_freq = freqs.old;
- }
- if (freqs.new != freqs.old) {
- loops_per_jiffy = cpufreq_scale(lpj_ref,
- lpj_ref_freq, freqs.new);
- }
- }
- /* TODO: just test case for cycles clock source, remove later */
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
- }
-
- pr_debug("cpufreq: done\n");
- return ret;
-}
-
-static int bfin_verify_speed(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, bfin_freq_table);
-}
-
-static int __bfin_cpu_init(struct cpufreq_policy *policy)
-{
-
- unsigned long cclk, sclk;
-
- cclk = get_cclk() / 1000;
- sclk = get_sclk() / 1000;
-
- if (policy->cpu == CPUFREQ_CPU)
- bfin_init_tables(cclk, sclk);
-
- policy->cpuinfo.transition_latency = 50000; /* 50us assumed */
-
- policy->cur = cclk;
- cpufreq_frequency_table_get_attr(bfin_freq_table, policy->cpu);
- return cpufreq_frequency_table_cpuinfo(policy, bfin_freq_table);
-}
-
-static struct freq_attr *bfin_freq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static struct cpufreq_driver bfin_driver = {
- .verify = bfin_verify_speed,
- .target = bfin_target,
- .get = bfin_getfreq_khz,
- .init = __bfin_cpu_init,
- .name = "bfin cpufreq",
- .owner = THIS_MODULE,
- .attr = bfin_freq_attr,
-};
-
-static int __init bfin_cpu_init(void)
-{
- return cpufreq_register_driver(&bfin_driver);
-}
-
-static void __exit bfin_cpu_exit(void)
-{
- cpufreq_unregister_driver(&bfin_driver);
-}
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("cpufreq driver for Blackfin");
-MODULE_LICENSE("GPL");
-
-module_init(bfin_cpu_init);
-module_exit(bfin_cpu_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 03:19:21 +0000