diff options
Diffstat (limited to 'target/linux/pxa/patches/000-cpufreq.patch')
| -rw-r--r-- | target/linux/pxa/patches/000-cpufreq.patch | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/target/linux/pxa/patches/000-cpufreq.patch b/target/linux/pxa/patches/000-cpufreq.patch new file mode 100644 index 0000000000..3cb6676b41 --- /dev/null +++ b/target/linux/pxa/patches/000-cpufreq.patch @@ -0,0 +1,533 @@ +diff -Nurbw linux-2.6.17/arch/arm/Kconfig linux-2.6.17-patched/arch/arm/Kconfig +--- linux-2.6.17/arch/arm/Kconfig 2006-06-17 18:49:35.000000000 -0700 ++++ linux-2.6.17-patched/arch/arm/Kconfig 2006-09-21 14:57:02.000000000 -0700 +@@ -656,7 +656,7 @@ + + endmenu + +-if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1) ++if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1 || ARCH_PXA) + + menu "CPU Frequency scaling" + +@@ -685,6 +685,13 @@ + + endmenu + ++config CPU_FREQ_PXA ++ bool ++ depends on CPU_FREQ && ARCH_PXA ++ default y ++ select CPU_FREQ_DEFAULT_GOV_USERSPACE ++ select CPU_FREQ_TABLE ++ + endif + + menu "Floating point emulation" +diff -Nurbw linux-2.6.17/arch/arm/mach-pxa/cpu-pxa.c linux-2.6.17-patched/arch/arm/mach-pxa/cpu-pxa.c +--- linux-2.6.17/arch/arm/mach-pxa/cpu-pxa.c 1969-12-31 16:00:00.000000000 -0800 ++++ linux-2.6.17-patched/arch/arm/mach-pxa/cpu-pxa.c 2006-09-21 14:57:02.000000000 -0700 +@@ -0,0 +1,324 @@ ++/* ++ * linux/arch/arm/mach-pxa/cpu-pxa.c ++ * ++ * Copyright (C) 2002,2003 Intrinsyc Software ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ * History: ++ * 31-Jul-2002 : Initial version [FB] ++ * 29-Jan-2003 : added PXA255 support [FB] ++ * 20-Apr-2003 : ported to v2.5 (Dustin McIntire, Sensoria Corp.) ++ * ++ * Note: ++ * This driver may change the memory bus clock rate, but will not do any ++ * platform specific access timing changes... for example if you have flash ++ * memory connected to CS0, you will need to register a platform specific ++ * notifier which will adjust the memory access strobes to maintain a ++ * minimum strobe width. ++ * ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/sched.h> ++#include <linux/init.h> ++#include <linux/cpufreq.h> ++ ++#include <asm/hardware.h> ++#include <asm/arch/pxa-regs.h> ++ ++#undef DEBUG ++ ++#ifdef DEBUG ++ static unsigned int freq_debug = DEBUG; ++ module_param(freq_debug, int, 0); ++ MODULE_PARM_DESC(freq_debug, "Set the debug messages to on=1/off=0"); ++#else ++ #define freq_debug 0 ++#endif ++ ++typedef struct ++{ ++ unsigned int khz; ++ unsigned int membus; ++ unsigned int cccr; ++ unsigned int div2; ++} pxa_freqs_t; ++ ++/* Define the refresh period in mSec for the SDRAM and the number of rows */ ++#define SDRAM_TREF 64 /* standard 64ms SDRAM */ ++#define SDRAM_ROWS 2048 /* 64MB=8192 32MB=4096 */ ++#define MDREFR_DRI(x) ((x*SDRAM_TREF)/(SDRAM_ROWS*32)) ++ ++#define CCLKCFG_TURBO 0x1 ++#define CCLKCFG_FCS 0x2 ++#define PXA25x_MIN_FREQ 99533 ++#define PXA25x_MAX_FREQ 530842 ++#define MDREFR_DB2_MASK (MDREFR_K2DB2 | MDREFR_K1DB2) ++#define MDREFR_DRI_MASK 0xFFF ++ ++ ++/* Use the run mode frequencies for the CPUFREQ_POLICY_PERFORMANCE policy */ ++static pxa_freqs_t pxa255_run_freqs[] = ++{ ++ /* CPU MEMBUS CCCR DIV2*/ ++ { 99533, 99533, 0x121, 1}, /* run= 99, turbo= 99, PXbus=50, SDRAM=50 */ ++ {132710, 132710, 0x123, 1}, /* run=133, turbo=133, PXbus=66, SDRAM=66 */ ++ {199066, 99533, 0x141, 0}, /* run=199, turbo=199, PXbus=99, SDRAM=99 */ ++ {265421, 132710, 0x143, 0}, /* run=265, turbo=265, PXbus=133, SDRAM=133 */ ++ {331776, 165888, 0x145, 1}, /* run=331, turbo=331, PXbus=166, SDRAM=83 */ ++ {398131, 99533, 0x161, 0}, /* run=398, turbo=398, PXbus=99, SDRAM=99 */ ++ {398131, 132710, 0x1c3, 0}, /* run=265, turbo=398, PXbus=133, SDRAM=133 */ ++ {530842, 132710, 0x163, 0}, /* run=531, turbo=531, PXbus=133, SDRAM=133 */ ++ {0,} ++}; ++#define NUM_RUN_FREQS (sizeof(pxa255_run_freqs)/sizeof(pxa_freqs_t)) ++ ++static struct cpufreq_frequency_table pxa255_run_freq_table[NUM_RUN_FREQS+1]; ++ ++/* Use the turbo mode frequencies for the CPUFREQ_POLICY_POWERSAVE policy */ ++static pxa_freqs_t pxa255_turbo_freqs[] = ++{ ++ /* CPU MEMBUS CCCR DIV2*/ ++ { 99533, 99533, 0x121, 1}, /* run=99, turbo= 99, PXbus=99, SDRAM=50 */ ++ {149299, 99533, 0x1a1, 0}, /* run=99, turbo=149, PXbus=99, SDRAM=99 */ ++ {199066, 99533, 0x221, 0}, /* run=99, turbo=199, PXbus=99, SDRAM=99 */ ++ {298598, 99533, 0x321, 0}, /* run=99, turbo=299, PXbus=99, SDRAM=99 */ ++ {398131, 99533, 0x241, 1}, /* run=199, turbo=398, PXbus=99, SDRAM=50 */ ++ {0,} ++}; ++#define NUM_TURBO_FREQS (sizeof(pxa255_turbo_freqs)/sizeof(pxa_freqs_t)) ++ ++static struct cpufreq_frequency_table pxa255_turbo_freq_table[NUM_TURBO_FREQS+1]; ++ ++extern unsigned get_clk_frequency_khz(int info); ++ ++/* find a valid frequency point */ ++static int pxa_verify_policy(struct cpufreq_policy *policy) ++{ ++ int ret; ++ struct cpufreq_frequency_table *pxa_freqs_table; ++ ++ if(policy->policy == CPUFREQ_POLICY_PERFORMANCE) { ++ pxa_freqs_table = pxa255_run_freq_table; ++ } else if (policy->policy == CPUFREQ_POLICY_POWERSAVE) { ++ pxa_freqs_table = pxa255_turbo_freq_table; ++ } else { ++ printk("CPU PXA: Unknown policy found. " ++ "Using CPUFREQ_POLICY_PERFORMANCE\n"); ++ pxa_freqs_table = pxa255_run_freq_table; ++ } ++ ret=cpufreq_frequency_table_verify(policy, pxa_freqs_table); ++ ++ if(freq_debug) { ++ printk("Verified CPU policy: %dKhz min to %dKhz max\n", ++ policy->min, policy->max); ++ } ++ ++ return ret; ++} ++ ++static int pxa_set_target(struct cpufreq_policy *policy, ++ unsigned int target_freq, ++ unsigned int relation) ++{ ++ int idx; ++ cpumask_t cpus_allowed; ++ int cpu = policy->cpu; ++ struct cpufreq_freqs freqs; ++ pxa_freqs_t *pxa_freq_settings; ++ struct cpufreq_frequency_table *pxa_freqs_table; ++ unsigned long flags; ++ unsigned int unused; ++ unsigned int preset_mdrefr, postset_mdrefr; ++ void *ramstart; ++ ++ /* ++ * Save this threads cpus_allowed mask. ++ */ ++ cpus_allowed = current->cpus_allowed; ++ ++ /* ++ * Bind to the specified CPU. When this call returns, ++ * we should be running on the right CPU. ++ */ ++ set_cpus_allowed(current, cpumask_of_cpu(cpu)); ++ BUG_ON(cpu != smp_processor_id()); ++ ++ /* Get the current policy */ ++ if(policy->policy == CPUFREQ_POLICY_PERFORMANCE) { ++ pxa_freq_settings = pxa255_run_freqs; ++ pxa_freqs_table = pxa255_run_freq_table; ++ }else if (policy->policy == CPUFREQ_POLICY_POWERSAVE) { ++ pxa_freq_settings = pxa255_turbo_freqs; ++ pxa_freqs_table = pxa255_turbo_freq_table; ++ }else { ++ printk("CPU PXA: Unknown policy found. " ++ "Using CPUFREQ_POLICY_PERFORMANCE\n"); ++ pxa_freq_settings = pxa255_run_freqs; ++ pxa_freqs_table = pxa255_run_freq_table; ++ } ++ ++ /* Lookup the next frequency */ ++ if (cpufreq_frequency_table_target(policy, pxa_freqs_table, ++ target_freq, relation, &idx)) { ++ return -EINVAL; ++ } ++ ++ freqs.old = policy->cur; ++ freqs.new = pxa_freq_settings[idx].khz; ++ freqs.cpu = policy->cpu; ++ if(freq_debug) { ++ printk(KERN_INFO "Changing CPU frequency to %d Mhz, (SDRAM %d Mhz)\n", ++ freqs.new/1000, (pxa_freq_settings[idx].div2) ? ++ (pxa_freq_settings[idx].membus/2000) : ++ (pxa_freq_settings[idx].membus/1000)); ++ } ++ ++ ramstart = phys_to_virt(0xa0000000); ++ ++ /* ++ * Tell everyone what we're about to do... ++ * you should add a notify client with any platform specific ++ * Vcc changing capability ++ */ ++ cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); ++ ++ /* Calculate the next MDREFR. If we're slowing down the SDRAM clock ++ * we need to preset the smaller DRI before the change. If we're speeding ++ * up we need to set the larger DRI value after the change. ++ */ ++ preset_mdrefr = postset_mdrefr = MDREFR; ++ if((MDREFR & MDREFR_DRI_MASK) > MDREFR_DRI(pxa_freq_settings[idx].membus)) { ++ preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK) | ++ MDREFR_DRI(pxa_freq_settings[idx].membus); ++ } ++ postset_mdrefr = (postset_mdrefr & ~MDREFR_DRI_MASK) | ++ MDREFR_DRI(pxa_freq_settings[idx].membus); ++ ++ /* If we're dividing the memory clock by two for the SDRAM clock, this ++ * must be set prior to the change. Clearing the divide must be done ++ * after the change. ++ */ ++ if(pxa_freq_settings[idx].div2) { ++ preset_mdrefr |= MDREFR_DB2_MASK; ++ postset_mdrefr |= MDREFR_DB2_MASK; ++ } else { ++ postset_mdrefr &= ~MDREFR_DB2_MASK; ++ } ++ ++ local_irq_save(flags); ++ ++ /* Set new the CCCR */ ++ CCCR = pxa_freq_settings[idx].cccr; ++ ++ __asm__ __volatile__(" \ ++ ldr r4, [%1] ; /* load MDREFR */ \ ++ b 2f ; \ ++ .align 5 ; \ ++1: \ ++ str %4, [%1] ; /* preset the MDREFR */ \ ++ mcr p14, 0, %2, c6, c0, 0 ; /* set CCLKCFG[FCS] */ \ ++ str %5, [%1] ; /* postset the MDREFR */ \ ++ \ ++ b 3f ; \ ++2: b 1b ; \ ++3: nop ; \ ++ " ++ : "=&r" (unused) ++ : "r" (&MDREFR), "r" (CCLKCFG_TURBO|CCLKCFG_FCS), "r" (ramstart), \ ++ "r" (preset_mdrefr), "r" (postset_mdrefr) ++ : "r4", "r5"); ++ local_irq_restore(flags); ++ ++ /* ++ * Restore the CPUs allowed mask. ++ */ ++ set_cpus_allowed(current, cpus_allowed); ++ ++ /* ++ * Tell everyone what we've just done... ++ * you should add a notify client with any platform specific ++ * SDRAM refresh timer adjustments ++ */ ++ cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); ++ ++ return 0; ++} ++ ++static int pxa_cpufreq_init(struct cpufreq_policy *policy) ++{ ++ cpumask_t cpus_allowed; ++ unsigned int cpu = policy->cpu; ++ int i; ++ ++ cpus_allowed = current->cpus_allowed; ++ ++ set_cpus_allowed(current, cpumask_of_cpu(cpu)); ++ BUG_ON(cpu != smp_processor_id()); ++ ++ /* set default policy and cpuinfo */ ++ policy->governor = CPUFREQ_DEFAULT_GOVERNOR; ++ policy->policy = CPUFREQ_POLICY_PERFORMANCE; ++ policy->cpuinfo.max_freq = PXA25x_MAX_FREQ; ++ policy->cpuinfo.min_freq = PXA25x_MIN_FREQ; ++ policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */ ++ policy->cur = get_clk_frequency_khz(0); /* current freq */ ++ policy->min = policy->max = policy->cur; ++ ++ /* Generate the run cpufreq_frequency_table struct */ ++ for(i=0;i<NUM_RUN_FREQS;i++) { ++ pxa255_run_freq_table[i].frequency = pxa255_run_freqs[i].khz; ++ pxa255_run_freq_table[i].index = i; ++ } ++ pxa255_run_freq_table[i].frequency = CPUFREQ_TABLE_END; ++ /* Generate the turbo cpufreq_frequency_table struct */ ++ for(i=0;i<NUM_TURBO_FREQS;i++) { ++ pxa255_turbo_freq_table[i].frequency = pxa255_turbo_freqs[i].khz; ++ pxa255_turbo_freq_table[i].index = i; ++ } ++ pxa255_turbo_freq_table[i].frequency = CPUFREQ_TABLE_END; ++ ++ set_cpus_allowed(current, cpus_allowed); ++ printk(KERN_INFO "PXA CPU frequency change support initialized\n"); ++ ++ return 0; ++} ++ ++static struct cpufreq_driver pxa_cpufreq_driver = { ++ .verify = pxa_verify_policy, ++ .target = pxa_set_target, ++ .init = pxa_cpufreq_init, ++ .name = "PXA25x", ++}; ++ ++static int __init pxa_cpu_init(void) ++{ ++ return cpufreq_register_driver(&pxa_cpufreq_driver); ++} ++ ++static void __exit pxa_cpu_exit(void) ++{ ++ cpufreq_unregister_driver(&pxa_cpufreq_driver); ++} ++ ++ ++MODULE_AUTHOR ("Intrinsyc Software Inc."); ++MODULE_DESCRIPTION ("CPU frequency changing driver for the PXA architecture"); ++MODULE_LICENSE("GPL"); ++module_init(pxa_cpu_init); ++module_exit(pxa_cpu_exit); ++ +diff -Nurbw linux-2.6.17/arch/arm/mach-pxa/Makefile linux-2.6.17-patched/arch/arm/mach-pxa/Makefile +--- linux-2.6.17/arch/arm/mach-pxa/Makefile 2006-09-21 15:11:33.000000000 -0700 ++++ linux-2.6.17-patched/arch/arm/mach-pxa/Makefile 2006-09-21 14:57:02.000000000 -0700 +@@ -30,5 +30,6 @@ + obj-$(CONFIG_PM) += pm.o sleep.o + obj-$(CONFIG_PXA_SSP) += ssp.o ++obj-$(CONFIG_CPU_FREQ) += cpu-pxa.o + + ifeq ($(CONFIG_PXA27x),y) + obj-$(CONFIG_PM) += standby.o +diff -Nurbw linux-2.6.17/Documentation/cpu-freq/user-guide.txt linux-2.6.17-patched/Documentation/cpu-freq/user-guide.txt +--- linux-2.6.17/Documentation/cpu-freq/user-guide.txt 2006-06-17 18:49:35.000000000 -0700 ++++ linux-2.6.17-patched/Documentation/cpu-freq/user-guide.txt 2006-09-21 14:57:02.000000000 -0700 +@@ -18,7 +18,7 @@ + Contents: + --------- + 1. Supported Architectures and Processors +-1.1 ARM ++1.1 ARM, PXA + 1.2 x86 + 1.3 sparc64 + 1.4 ppc +@@ -37,14 +37,15 @@ + 1. Supported Architectures and Processors + ========================================= + +-1.1 ARM +-------- ++1.1 ARM, PXA ++------------ + + The following ARM processors are supported by cpufreq: + + ARM Integrator + ARM-SA1100 + ARM-SA1110 ++Intel PXA + + + 1.2 x86 +diff -Nurbw linux-2.6.17/drivers/cpufreq/Kconfig linux-2.6.17-patched/drivers/cpufreq/Kconfig +--- linux-2.6.17/drivers/cpufreq/Kconfig 2006-06-17 18:49:35.000000000 -0700 ++++ linux-2.6.17-patched/drivers/cpufreq/Kconfig 2006-09-21 15:06:12.000000000 -0700 +@@ -46,13 +46,9 @@ + This will show detail CPU frequency translation table in sysfs file + system + +-# Note that it is not currently possible to set the other governors (such as ondemand) +-# as the default, since if they fail to initialise, cpufreq will be +-# left in an undefined state. +- + choice + prompt "Default CPUFreq governor" +- default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110 ++ default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110 || CPU_FREQ_PXA + default CPU_FREQ_DEFAULT_GOV_PERFORMANCE + help + This option sets which CPUFreq governor shall be loaded at +@@ -66,6 +62,14 @@ + the frequency statically to the highest frequency supported by + the CPU. + ++config CPU_FREQ_DEFAULT_GOV_POWERSAVE ++ bool "powersave" ++ select CPU_FREQ_GOV_POWERSAVE ++ help ++ Use the CPUFreq governor 'powersave' as default. This sets ++ the frequency statically to the lowest frequency supported by ++ the CPU. ++ + config CPU_FREQ_DEFAULT_GOV_USERSPACE + bool "userspace" + select CPU_FREQ_GOV_USERSPACE +@@ -75,6 +79,23 @@ + program shall be able to set the CPU dynamically without having + to enable the userspace governor manually. + ++config CPU_FREQ_DEFAULT_GOV_ONDEMAND ++ bool "ondemand" ++ select CPU_FREQ_GOV_ONDEMAND ++ help ++ Use the CPUFreq governor 'ondemand' as default. This sets ++ the frequency dynamically based on CPU load, throttling up ++ and down as necessary. ++ ++config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE ++ bool "conservative" ++ select CPU_FREQ_GOV_CONSERVATIVE ++ help ++ Use the CPUFreq governor 'conservative' as default. This sets ++ the frequency dynamically based on CPU load, throttling up ++ and down as necessary. The frequency is gracefully increased ++ and decreased rather than jumping to 100% when speed is required. ++ + endchoice + + config CPU_FREQ_GOV_PERFORMANCE +diff -Nurbw linux-2.6.17/include/linux/cpufreq.h linux-2.6.17-patched/include/linux/cpufreq.h +--- linux-2.6.17/include/linux/cpufreq.h 2006-06-17 18:49:35.000000000 -0700 ++++ linux-2.6.17-patched/include/linux/cpufreq.h 2006-09-21 15:08:35.000000000 -0700 +@@ -276,9 +276,18 @@ + #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE + extern struct cpufreq_governor cpufreq_gov_performance; + #define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_performance ++#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) ++extern struct cpufreq_governor cpufreq_gov_powersave; ++#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_powersave + #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) + extern struct cpufreq_governor cpufreq_gov_userspace; + #define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_userspace ++#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) ++extern struct cpufreq_governor cpufreq_gov_ondemand; ++#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_ondemand; ++#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) ++extern struct cpufreq_governor cpufreq_gov_conservative; ++#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_conservative; + #endif + + +diff -Nubrw --exclude='.*.o.cmd' linux-2.6.17/drivers/cpufreq/cpufreq_conservative.c linux-2.6.17-patched/drivers/cpufreq/cpufreq_conservative.c +--- linux-2.6.17/drivers/cpufreq/cpufreq_conservative.c 2006-09-21 15:26:46.000000000 -0700 ++++ linux-2.6.17-patched/drivers/cpufreq/cpufreq_conservative.c 2006-06-17 18:49:35.000000000 -0700 +@@ -529,7 +529,7 @@ + return 0; + } + +-static struct cpufreq_governor cpufreq_gov_dbs = { ++struct cpufreq_governor cpufreq_gov_conservative = { + .name = "conservative", + .governor = cpufreq_governor_dbs, + .owner = THIS_MODULE, +@@ -537,7 +537,7 @@ + + static int __init cpufreq_gov_dbs_init(void) + { +- return cpufreq_register_governor(&cpufreq_gov_dbs); ++ return cpufreq_register_governor(&cpufreq_gov_conservative); + } + + static void __exit cpufreq_gov_dbs_exit(void) +@@ -545,7 +545,7 @@ + /* Make sure that the scheduled work is indeed not running */ + flush_scheduled_work(); + +- cpufreq_unregister_governor(&cpufreq_gov_dbs); ++ cpufreq_unregister_governor(&cpufreq_gov_conservative); + } + + +diff -Nubrw --exclude='.*.o.cmd' linux-2.6.17/drivers/cpufreq/cpufreq_ondemand.c linux-2.6.17-patched/drivers/cpufreq/cpufreq_ondemand.c +--- linux-2.6.17/drivers/cpufreq/cpufreq_ondemand.c 2006-06-17 18:49:35.000000000 -0700 ++++ linux-2.6.17-patched/drivers/cpufreq/cpufreq_ondemand.c 2006-09-27 14:00:15.000000000 -0700 +@@ -484,7 +484,7 @@ + return 0; + } + +-static struct cpufreq_governor cpufreq_gov_dbs = { ++struct cpufreq_governor cpufreq_gov_ondemand = { + .name = "ondemand", + .governor = cpufreq_governor_dbs, + .owner = THIS_MODULE, +@@ -492,7 +492,7 @@ + + static int __init cpufreq_gov_dbs_init(void) + { +- return cpufreq_register_governor(&cpufreq_gov_dbs); ++ return cpufreq_register_governor(&cpufreq_gov_ondemand); + } + + static void __exit cpufreq_gov_dbs_exit(void) +@@ -504,7 +504,7 @@ + destroy_workqueue(dbs_workq); + } + +- cpufreq_unregister_governor(&cpufreq_gov_dbs); ++ cpufreq_unregister_governor(&cpufreq_gov_ondemand); + } + + |