From b43a7ffbf33be7e4d3b10b7714ee663ea2c52fe2 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Sun, 24 Mar 2013 11:56:43 +0530 Subject: cpufreq: Notify all policy->cpus in cpufreq_notify_transition() policy->cpus contains all online cpus that have single shared clock line. And their frequencies are always updated together. Many SMP system's cpufreq drivers take care of this in individual drivers but the best place for this code is in cpufreq core. This patch modifies cpufreq_notify_transition() to notify frequency change for all cpus in policy->cpus and hence updates all users of this API. Signed-off-by: Viresh Kumar Acked-by: Stephen Warren Tested-by: Stephen Warren Signed-off-by: Rafael J. Wysocki --- arch/cris/arch-v32/mach-a3/cpufreq.c | 20 +++++++------------- arch/cris/arch-v32/mach-fs/cpufreq.c | 17 +++++++---------- 2 files changed, 14 insertions(+), 23 deletions(-) (limited to 'arch/cris') diff --git a/arch/cris/arch-v32/mach-a3/cpufreq.c b/arch/cris/arch-v32/mach-a3/cpufreq.c index ee391ecb5bc9..ee142c490575 100644 --- a/arch/cris/arch-v32/mach-a3/cpufreq.c +++ b/arch/cris/arch-v32/mach-a3/cpufreq.c @@ -27,23 +27,17 @@ static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) return clk_ctrl.pll ? 200000 : 6000; } -static void cris_freq_set_cpu_state(unsigned int state) +static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, + unsigned int state) { - int i = 0; struct cpufreq_freqs freqs; reg_clkgen_rw_clk_ctrl clk_ctrl; clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl); -#ifdef CONFIG_SMP - for_each_present_cpu(i) -#endif - { - freqs.old = cris_freq_get_cpu_frequency(i); - freqs.new = cris_freq_table[state].frequency; - freqs.cpu = i; - } + freqs.old = cris_freq_get_cpu_frequency(policy->cpu); + freqs.new = cris_freq_table[state].frequency; - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); local_irq_disable(); @@ -57,7 +51,7 @@ static void cris_freq_set_cpu_state(unsigned int state) local_irq_enable(); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); }; static int cris_freq_verify(struct cpufreq_policy *policy) @@ -75,7 +69,7 @@ static int cris_freq_target(struct cpufreq_policy *policy, target_freq, relation, &newstate)) return -EINVAL; - cris_freq_set_cpu_state(newstate); + cris_freq_set_cpu_state(policy, newstate); return 0; } diff --git a/arch/cris/arch-v32/mach-fs/cpufreq.c b/arch/cris/arch-v32/mach-fs/cpufreq.c index d92cf70d1cbe..12952235d5db 100644 --- a/arch/cris/arch-v32/mach-fs/cpufreq.c +++ b/arch/cris/arch-v32/mach-fs/cpufreq.c @@ -27,20 +27,17 @@ static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) return clk_ctrl.pll ? 200000 : 6000; } -static void cris_freq_set_cpu_state(unsigned int state) +static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, + unsigned int state) { - int i; struct cpufreq_freqs freqs; reg_config_rw_clk_ctrl clk_ctrl; clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); - for_each_possible_cpu(i) { - freqs.old = cris_freq_get_cpu_frequency(i); - freqs.new = cris_freq_table[state].frequency; - freqs.cpu = i; - } + freqs.old = cris_freq_get_cpu_frequency(policy->cpu); + freqs.new = cris_freq_table[state].frequency; - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); local_irq_disable(); @@ -54,7 +51,7 @@ static void cris_freq_set_cpu_state(unsigned int state) local_irq_enable(); - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); }; static int cris_freq_verify(struct cpufreq_policy *policy) @@ -71,7 +68,7 @@ static int cris_freq_target(struct cpufreq_policy *policy, (policy, cris_freq_table, target_freq, relation, &newstate)) return -EINVAL; - cris_freq_set_cpu_state(newstate); + cris_freq_set_cpu_state(policy, newstate); return 0; } -- cgit v1.2.3 From 8e8aa95a2b0b2b0184b3b72b324a6145362720bd Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Thu, 4 Apr 2013 12:54:19 +0000 Subject: cpufreq: cris: move cpufreq driver to drivers/cpufreq This patch moves cpufreq drivers of CRIS architecture to drivers/cpufreq. Signed-off-by: Viresh Kumar Acked-by: Jesper Nilsson Signed-off-by: Rafael J. Wysocki --- arch/cris/arch-v32/mach-a3/Makefile | 1 - arch/cris/arch-v32/mach-a3/cpufreq.c | 146 --------------------------------- arch/cris/arch-v32/mach-fs/Makefile | 1 - arch/cris/arch-v32/mach-fs/cpufreq.c | 142 -------------------------------- drivers/cpufreq/Makefile | 2 + drivers/cpufreq/cris-artpec3-cpufreq.c | 146 +++++++++++++++++++++++++++++++++ drivers/cpufreq/cris-etraxfs-cpufreq.c | 142 ++++++++++++++++++++++++++++++++ 7 files changed, 290 insertions(+), 290 deletions(-) delete mode 100644 arch/cris/arch-v32/mach-a3/cpufreq.c delete mode 100644 arch/cris/arch-v32/mach-fs/cpufreq.c create mode 100644 drivers/cpufreq/cris-artpec3-cpufreq.c create mode 100644 drivers/cpufreq/cris-etraxfs-cpufreq.c (limited to 'arch/cris') diff --git a/arch/cris/arch-v32/mach-a3/Makefile b/arch/cris/arch-v32/mach-a3/Makefile index d366e0891988..18a227196a41 100644 --- a/arch/cris/arch-v32/mach-a3/Makefile +++ b/arch/cris/arch-v32/mach-a3/Makefile @@ -3,7 +3,6 @@ # obj-y := dma.o pinmux.o io.o arbiter.o -obj-$(CONFIG_CPU_FREQ) += cpufreq.o clean: diff --git a/arch/cris/arch-v32/mach-a3/cpufreq.c b/arch/cris/arch-v32/mach-a3/cpufreq.c deleted file mode 100644 index ee142c490575..000000000000 --- a/arch/cris/arch-v32/mach-a3/cpufreq.c +++ /dev/null @@ -1,146 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include - -static int -cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data); - -static struct notifier_block cris_sdram_freq_notifier_block = { - .notifier_call = cris_sdram_freq_notifier -}; - -static struct cpufreq_frequency_table cris_freq_table[] = { - {0x01, 6000}, - {0x02, 200000}, - {0, CPUFREQ_TABLE_END}, -}; - -static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) -{ - reg_clkgen_rw_clk_ctrl clk_ctrl; - clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl); - return clk_ctrl.pll ? 200000 : 6000; -} - -static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, - unsigned int state) -{ - struct cpufreq_freqs freqs; - reg_clkgen_rw_clk_ctrl clk_ctrl; - clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl); - - freqs.old = cris_freq_get_cpu_frequency(policy->cpu); - freqs.new = cris_freq_table[state].frequency; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - - local_irq_disable(); - - /* Even though we may be SMP they will share the same clock - * so all settings are made on CPU0. */ - if (cris_freq_table[state].frequency == 200000) - clk_ctrl.pll = 1; - else - clk_ctrl.pll = 0; - REG_WR(clkgen, regi_clkgen, rw_clk_ctrl, clk_ctrl); - - local_irq_enable(); - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); -}; - -static int cris_freq_verify(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, &cris_freq_table[0]); -} - -static int cris_freq_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) -{ - unsigned int newstate = 0; - - if (cpufreq_frequency_table_target(policy, cris_freq_table, - target_freq, relation, &newstate)) - return -EINVAL; - - cris_freq_set_cpu_state(policy, newstate); - - return 0; -} - -static int cris_freq_cpu_init(struct cpufreq_policy *policy) -{ - int result; - - /* cpuinfo and default policy values */ - policy->cpuinfo.transition_latency = 1000000; /* 1ms */ - policy->cur = cris_freq_get_cpu_frequency(0); - - result = cpufreq_frequency_table_cpuinfo(policy, cris_freq_table); - if (result) - return (result); - - cpufreq_frequency_table_get_attr(cris_freq_table, policy->cpu); - - return 0; -} - - -static int cris_freq_cpu_exit(struct cpufreq_policy *policy) -{ - cpufreq_frequency_table_put_attr(policy->cpu); - return 0; -} - - -static struct freq_attr *cris_freq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver cris_freq_driver = { - .get = cris_freq_get_cpu_frequency, - .verify = cris_freq_verify, - .target = cris_freq_target, - .init = cris_freq_cpu_init, - .exit = cris_freq_cpu_exit, - .name = "cris_freq", - .owner = THIS_MODULE, - .attr = cris_freq_attr, -}; - -static int __init cris_freq_init(void) -{ - int ret; - ret = cpufreq_register_driver(&cris_freq_driver); - cpufreq_register_notifier(&cris_sdram_freq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); - return ret; -} - -static int -cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data) -{ - int i; - struct cpufreq_freqs *freqs = data; - if (val == CPUFREQ_PRECHANGE) { - reg_ddr2_rw_cfg cfg = - REG_RD(ddr2, regi_ddr2_ctrl, rw_cfg); - cfg.ref_interval = (freqs->new == 200000 ? 1560 : 46); - - if (freqs->new == 200000) - for (i = 0; i < 50000; i++); - REG_WR(bif_core, regi_bif_core, rw_sdram_timing, timing); - } - return 0; -} - - -module_init(cris_freq_init); diff --git a/arch/cris/arch-v32/mach-fs/Makefile b/arch/cris/arch-v32/mach-fs/Makefile index d366e0891988..18a227196a41 100644 --- a/arch/cris/arch-v32/mach-fs/Makefile +++ b/arch/cris/arch-v32/mach-fs/Makefile @@ -3,7 +3,6 @@ # obj-y := dma.o pinmux.o io.o arbiter.o -obj-$(CONFIG_CPU_FREQ) += cpufreq.o clean: diff --git a/arch/cris/arch-v32/mach-fs/cpufreq.c b/arch/cris/arch-v32/mach-fs/cpufreq.c deleted file mode 100644 index 12952235d5db..000000000000 --- a/arch/cris/arch-v32/mach-fs/cpufreq.c +++ /dev/null @@ -1,142 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include - -static int -cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data); - -static struct notifier_block cris_sdram_freq_notifier_block = { - .notifier_call = cris_sdram_freq_notifier -}; - -static struct cpufreq_frequency_table cris_freq_table[] = { - {0x01, 6000}, - {0x02, 200000}, - {0, CPUFREQ_TABLE_END}, -}; - -static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) -{ - reg_config_rw_clk_ctrl clk_ctrl; - clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); - return clk_ctrl.pll ? 200000 : 6000; -} - -static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, - unsigned int state) -{ - struct cpufreq_freqs freqs; - reg_config_rw_clk_ctrl clk_ctrl; - clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); - - freqs.old = cris_freq_get_cpu_frequency(policy->cpu); - freqs.new = cris_freq_table[state].frequency; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - - local_irq_disable(); - - /* Even though we may be SMP they will share the same clock - * so all settings are made on CPU0. */ - if (cris_freq_table[state].frequency == 200000) - clk_ctrl.pll = 1; - else - clk_ctrl.pll = 0; - REG_WR(config, regi_config, rw_clk_ctrl, clk_ctrl); - - local_irq_enable(); - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); -}; - -static int cris_freq_verify(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, &cris_freq_table[0]); -} - -static int cris_freq_target(struct cpufreq_policy *policy, - unsigned int target_freq, unsigned int relation) -{ - unsigned int newstate = 0; - - if (cpufreq_frequency_table_target - (policy, cris_freq_table, target_freq, relation, &newstate)) - return -EINVAL; - - cris_freq_set_cpu_state(policy, newstate); - - return 0; -} - -static int cris_freq_cpu_init(struct cpufreq_policy *policy) -{ - int result; - - /* cpuinfo and default policy values */ - policy->cpuinfo.transition_latency = 1000000; /* 1ms */ - policy->cur = cris_freq_get_cpu_frequency(0); - - result = cpufreq_frequency_table_cpuinfo(policy, cris_freq_table); - if (result) - return (result); - - cpufreq_frequency_table_get_attr(cris_freq_table, policy->cpu); - - return 0; -} - -static int cris_freq_cpu_exit(struct cpufreq_policy *policy) -{ - cpufreq_frequency_table_put_attr(policy->cpu); - return 0; -} - -static struct freq_attr *cris_freq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver cris_freq_driver = { - .get = cris_freq_get_cpu_frequency, - .verify = cris_freq_verify, - .target = cris_freq_target, - .init = cris_freq_cpu_init, - .exit = cris_freq_cpu_exit, - .name = "cris_freq", - .owner = THIS_MODULE, - .attr = cris_freq_attr, -}; - -static int __init cris_freq_init(void) -{ - int ret; - ret = cpufreq_register_driver(&cris_freq_driver); - cpufreq_register_notifier(&cris_sdram_freq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); - return ret; -} - -static int -cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, - void *data) -{ - int i; - struct cpufreq_freqs *freqs = data; - if (val == CPUFREQ_PRECHANGE) { - reg_bif_core_rw_sdram_timing timing = - REG_RD(bif_core, regi_bif_core, rw_sdram_timing); - timing.cpd = (freqs->new == 200000 ? 0 : 1); - - if (freqs->new == 200000) - for (i = 0; i < 50000; i++) ; - REG_WR(bif_core, regi_bif_core, rw_sdram_timing, timing); - } - return 0; -} - -module_init(cris_freq_init); diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 6f8fec34abeb..2d6dbf30862b 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -79,3 +79,5 @@ obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o # Other platform drivers obj-$(CONFIG_AVR32_AT32AP_CPUFREQ) += at32ap-cpufreq.o obj-$(CONFIG_BLACKFIN) += blackfin-cpufreq.o +obj-$(CONFIG_CRIS_MACH_ARTPEC3) += cris-artpec3-cpufreq.o +obj-$(CONFIG_ETRAXFS) += cris-etraxfs-cpufreq.o diff --git a/drivers/cpufreq/cris-artpec3-cpufreq.c b/drivers/cpufreq/cris-artpec3-cpufreq.c new file mode 100644 index 000000000000..ee142c490575 --- /dev/null +++ b/drivers/cpufreq/cris-artpec3-cpufreq.c @@ -0,0 +1,146 @@ +#include +#include +#include +#include +#include +#include +#include + +static int +cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, + void *data); + +static struct notifier_block cris_sdram_freq_notifier_block = { + .notifier_call = cris_sdram_freq_notifier +}; + +static struct cpufreq_frequency_table cris_freq_table[] = { + {0x01, 6000}, + {0x02, 200000}, + {0, CPUFREQ_TABLE_END}, +}; + +static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) +{ + reg_clkgen_rw_clk_ctrl clk_ctrl; + clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl); + return clk_ctrl.pll ? 200000 : 6000; +} + +static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, + unsigned int state) +{ + struct cpufreq_freqs freqs; + reg_clkgen_rw_clk_ctrl clk_ctrl; + clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl); + + freqs.old = cris_freq_get_cpu_frequency(policy->cpu); + freqs.new = cris_freq_table[state].frequency; + + cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + + local_irq_disable(); + + /* Even though we may be SMP they will share the same clock + * so all settings are made on CPU0. */ + if (cris_freq_table[state].frequency == 200000) + clk_ctrl.pll = 1; + else + clk_ctrl.pll = 0; + REG_WR(clkgen, regi_clkgen, rw_clk_ctrl, clk_ctrl); + + local_irq_enable(); + + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); +}; + +static int cris_freq_verify(struct cpufreq_policy *policy) +{ + return cpufreq_frequency_table_verify(policy, &cris_freq_table[0]); +} + +static int cris_freq_target(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation) +{ + unsigned int newstate = 0; + + if (cpufreq_frequency_table_target(policy, cris_freq_table, + target_freq, relation, &newstate)) + return -EINVAL; + + cris_freq_set_cpu_state(policy, newstate); + + return 0; +} + +static int cris_freq_cpu_init(struct cpufreq_policy *policy) +{ + int result; + + /* cpuinfo and default policy values */ + policy->cpuinfo.transition_latency = 1000000; /* 1ms */ + policy->cur = cris_freq_get_cpu_frequency(0); + + result = cpufreq_frequency_table_cpuinfo(policy, cris_freq_table); + if (result) + return (result); + + cpufreq_frequency_table_get_attr(cris_freq_table, policy->cpu); + + return 0; +} + + +static int cris_freq_cpu_exit(struct cpufreq_policy *policy) +{ + cpufreq_frequency_table_put_attr(policy->cpu); + return 0; +} + + +static struct freq_attr *cris_freq_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, +}; + +static struct cpufreq_driver cris_freq_driver = { + .get = cris_freq_get_cpu_frequency, + .verify = cris_freq_verify, + .target = cris_freq_target, + .init = cris_freq_cpu_init, + .exit = cris_freq_cpu_exit, + .name = "cris_freq", + .owner = THIS_MODULE, + .attr = cris_freq_attr, +}; + +static int __init cris_freq_init(void) +{ + int ret; + ret = cpufreq_register_driver(&cris_freq_driver); + cpufreq_register_notifier(&cris_sdram_freq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); + return ret; +} + +static int +cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, + void *data) +{ + int i; + struct cpufreq_freqs *freqs = data; + if (val == CPUFREQ_PRECHANGE) { + reg_ddr2_rw_cfg cfg = + REG_RD(ddr2, regi_ddr2_ctrl, rw_cfg); + cfg.ref_interval = (freqs->new == 200000 ? 1560 : 46); + + if (freqs->new == 200000) + for (i = 0; i < 50000; i++); + REG_WR(bif_core, regi_bif_core, rw_sdram_timing, timing); + } + return 0; +} + + +module_init(cris_freq_init); diff --git a/drivers/cpufreq/cris-etraxfs-cpufreq.c b/drivers/cpufreq/cris-etraxfs-cpufreq.c new file mode 100644 index 000000000000..12952235d5db --- /dev/null +++ b/drivers/cpufreq/cris-etraxfs-cpufreq.c @@ -0,0 +1,142 @@ +#include +#include +#include +#include +#include +#include +#include + +static int +cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, + void *data); + +static struct notifier_block cris_sdram_freq_notifier_block = { + .notifier_call = cris_sdram_freq_notifier +}; + +static struct cpufreq_frequency_table cris_freq_table[] = { + {0x01, 6000}, + {0x02, 200000}, + {0, CPUFREQ_TABLE_END}, +}; + +static unsigned int cris_freq_get_cpu_frequency(unsigned int cpu) +{ + reg_config_rw_clk_ctrl clk_ctrl; + clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); + return clk_ctrl.pll ? 200000 : 6000; +} + +static void cris_freq_set_cpu_state(struct cpufreq_policy *policy, + unsigned int state) +{ + struct cpufreq_freqs freqs; + reg_config_rw_clk_ctrl clk_ctrl; + clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl); + + freqs.old = cris_freq_get_cpu_frequency(policy->cpu); + freqs.new = cris_freq_table[state].frequency; + + cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + + local_irq_disable(); + + /* Even though we may be SMP they will share the same clock + * so all settings are made on CPU0. */ + if (cris_freq_table[state].frequency == 200000) + clk_ctrl.pll = 1; + else + clk_ctrl.pll = 0; + REG_WR(config, regi_config, rw_clk_ctrl, clk_ctrl); + + local_irq_enable(); + + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); +}; + +static int cris_freq_verify(struct cpufreq_policy *policy) +{ + return cpufreq_frequency_table_verify(policy, &cris_freq_table[0]); +} + +static int cris_freq_target(struct cpufreq_policy *policy, + unsigned int target_freq, unsigned int relation) +{ + unsigned int newstate = 0; + + if (cpufreq_frequency_table_target + (policy, cris_freq_table, target_freq, relation, &newstate)) + return -EINVAL; + + cris_freq_set_cpu_state(policy, newstate); + + return 0; +} + +static int cris_freq_cpu_init(struct cpufreq_policy *policy) +{ + int result; + + /* cpuinfo and default policy values */ + policy->cpuinfo.transition_latency = 1000000; /* 1ms */ + policy->cur = cris_freq_get_cpu_frequency(0); + + result = cpufreq_frequency_table_cpuinfo(policy, cris_freq_table); + if (result) + return (result); + + cpufreq_frequency_table_get_attr(cris_freq_table, policy->cpu); + + return 0; +} + +static int cris_freq_cpu_exit(struct cpufreq_policy *policy) +{ + cpufreq_frequency_table_put_attr(policy->cpu); + return 0; +} + +static struct freq_attr *cris_freq_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, +}; + +static struct cpufreq_driver cris_freq_driver = { + .get = cris_freq_get_cpu_frequency, + .verify = cris_freq_verify, + .target = cris_freq_target, + .init = cris_freq_cpu_init, + .exit = cris_freq_cpu_exit, + .name = "cris_freq", + .owner = THIS_MODULE, + .attr = cris_freq_attr, +}; + +static int __init cris_freq_init(void) +{ + int ret; + ret = cpufreq_register_driver(&cris_freq_driver); + cpufreq_register_notifier(&cris_sdram_freq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); + return ret; +} + +static int +cris_sdram_freq_notifier(struct notifier_block *nb, unsigned long val, + void *data) +{ + int i; + struct cpufreq_freqs *freqs = data; + if (val == CPUFREQ_PRECHANGE) { + reg_bif_core_rw_sdram_timing timing = + REG_RD(bif_core, regi_bif_core, rw_sdram_timing); + timing.cpd = (freqs->new == 200000 ? 0 : 1); + + if (freqs->new == 200000) + for (i = 0; i < 50000; i++) ; + REG_WR(bif_core, regi_bif_core, rw_sdram_timing, timing); + } + return 0; +} + +module_init(cris_freq_init); -- cgit v1.2.3