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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 02:21:02 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 02:21:02 +0400 |
commit | 3ed1c478eff8db80e234d5446cb378b503135888 (patch) | |
tree | e1c8e0f488ca49c49b5a31fe59add4254381dd4b /arch/blackfin | |
parent | 151173e8ce9b95bbbbd7eedb9035cfaffbdb7cb2 (diff) | |
parent | 371deb9500831ad1afbf9ea00e373f650deaed2f (diff) | |
download | linux-3ed1c478eff8db80e234d5446cb378b503135888.tar.xz |
Merge tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael J Wysocki:
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim, Lv
Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements from
Rafael J Wysocki and Andy Shevchenko.
* tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (192 commits)
cpufreq: Revert incorrect commit 5800043
cpufreq: MAINTAINERS: Add co-maintainer
cpuidle: add maintainer entry
ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points
ARM: s3c64xx: cpuidle: use init/exit common routine
cpufreq: pxa2xx: initialize variables
ACPI: video: correct acpi_video_bus_add error processing
SH: cpuidle: use init/exit common routine
ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y
ACPI: Fix wrong parameter passed to memblock_reserve
cpuidle: fix comment format
pnp: use %*phC to dump small buffers
isapnp: remove debug leftovers
ARM: imx: cpuidle: use init/exit common routine
ARM: davinci: cpuidle: use init/exit common routine
ARM: kirkwood: cpuidle: use init/exit common routine
ARM: calxeda: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine for tegra3
ARM: tegra: cpuidle: use init/exit common routine for tegra2
ARM: OMAP4: cpuidle: use init/exit common routine
...
Diffstat (limited to 'arch/blackfin')
-rw-r--r-- | arch/blackfin/mach-common/Makefile | 1 | ||||
-rw-r--r-- | arch/blackfin/mach-common/cpufreq.c | 258 |
2 files changed, 0 insertions, 259 deletions
diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile index 75f0ba29ebb9..675466d490d4 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 d88bd31319e6..000000000000 --- 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); |