diff options
Diffstat (limited to 'drivers/cpufreq/s5pv210-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 86 |
1 files changed, 21 insertions, 65 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 5c7757073793..e3973dae28a7 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -26,7 +26,6 @@ static struct clk *cpu_clk; static struct clk *dmc0_clk; static struct clk *dmc1_clk; -static struct cpufreq_freqs freqs; static DEFINE_MUTEX(set_freq_lock); /* APLL M,P,S values for 1G/800Mhz */ @@ -36,16 +35,7 @@ static DEFINE_MUTEX(set_freq_lock); /* Use 800MHz when entering sleep mode */ #define SLEEP_FREQ (800 * 1000) -/* - * relation has an additional symantics other than the standard of cpufreq - * DISALBE_FURTHER_CPUFREQ: disable further access to target - * ENABLE_FURTUER_CPUFREQ: enable access to target - */ -enum cpufreq_access { - DISABLE_FURTHER_CPUFREQ = 0x10, - ENABLE_FURTHER_CPUFREQ = 0x20, -}; - +/* Tracks if cpu freqency can be updated anymore */ static bool no_cpufreq_access; /* @@ -174,14 +164,6 @@ static void s5pv210_set_refresh(enum s5pv210_dmc_port ch, unsigned long freq) __raw_writel(tmp1, reg); } -static int s5pv210_verify_speed(struct cpufreq_policy *policy) -{ - if (policy->cpu) - return -EINVAL; - - return cpufreq_frequency_table_verify(policy, s5pv210_freq_table); -} - static unsigned int s5pv210_getspeed(unsigned int cpu) { if (cpu) @@ -190,22 +172,18 @@ static unsigned int s5pv210_getspeed(unsigned int cpu) return clk_get_rate(cpu_clk) / 1000; } -static int s5pv210_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) +static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index) { unsigned long reg; - unsigned int index, priv_index; + unsigned int priv_index; unsigned int pll_changing = 0; unsigned int bus_speed_changing = 0; + unsigned int old_freq, new_freq; int arm_volt, int_volt; int ret = 0; mutex_lock(&set_freq_lock); - if (relation & ENABLE_FURTHER_CPUFREQ) - no_cpufreq_access = false; - if (no_cpufreq_access) { #ifdef CONFIG_PM_VERBOSE pr_err("%s:%d denied access to %s as it is disabled" @@ -215,27 +193,13 @@ static int s5pv210_target(struct cpufreq_policy *policy, goto exit; } - if (relation & DISABLE_FURTHER_CPUFREQ) - no_cpufreq_access = true; - - relation &= ~(ENABLE_FURTHER_CPUFREQ | DISABLE_FURTHER_CPUFREQ); - - freqs.old = s5pv210_getspeed(0); - - if (cpufreq_frequency_table_target(policy, s5pv210_freq_table, - target_freq, relation, &index)) { - ret = -EINVAL; - goto exit; - } - - freqs.new = s5pv210_freq_table[index].frequency; - - if (freqs.new == freqs.old) - goto exit; + old_freq = s5pv210_getspeed(0); + new_freq = s5pv210_freq_table[index].frequency; /* Finding current running level index */ if (cpufreq_frequency_table_target(policy, s5pv210_freq_table, - freqs.old, relation, &priv_index)) { + old_freq, CPUFREQ_RELATION_H, + &priv_index)) { ret = -EINVAL; goto exit; } @@ -243,7 +207,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, arm_volt = dvs_conf[index].arm_volt; int_volt = dvs_conf[index].int_volt; - if (freqs.new > freqs.old) { + if (new_freq > old_freq) { ret = regulator_set_voltage(arm_regulator, arm_volt, arm_volt_max); if (ret) @@ -255,8 +219,6 @@ static int s5pv210_target(struct cpufreq_policy *policy, goto exit; } - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - /* Check if there need to change PLL */ if ((index == L0) || (priv_index == L0)) pll_changing = 1; @@ -467,9 +429,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, } } - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - - if (freqs.new < freqs.old) { + if (new_freq < old_freq) { regulator_set_voltage(int_regulator, int_volt, int_volt_max); @@ -551,13 +511,7 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy) s5pv210_dram_conf[1].refresh = (__raw_readl(S5P_VA_DMC1 + 0x30) * 1000); s5pv210_dram_conf[1].freq = clk_get_rate(dmc1_clk); - policy->cur = policy->min = policy->max = s5pv210_getspeed(0); - - cpufreq_frequency_table_get_attr(s5pv210_freq_table, policy->cpu); - - policy->cpuinfo.transition_latency = 40000; - - return cpufreq_frequency_table_cpuinfo(policy, s5pv210_freq_table); + return cpufreq_generic_init(policy, s5pv210_freq_table, 40000); out_dmc1: clk_put(dmc0_clk); @@ -573,16 +527,18 @@ static int s5pv210_cpufreq_notifier_event(struct notifier_block *this, switch (event) { case PM_SUSPEND_PREPARE: - ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, - DISABLE_FURTHER_CPUFREQ); + ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, 0); if (ret < 0) return NOTIFY_BAD; + /* Disable updation of cpu frequency */ + no_cpufreq_access = true; return NOTIFY_OK; case PM_POST_RESTORE: case PM_POST_SUSPEND: - cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, - ENABLE_FURTHER_CPUFREQ); + /* Enable updation of cpu frequency */ + no_cpufreq_access = false; + cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, 0); return NOTIFY_OK; } @@ -595,18 +551,18 @@ static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this, { int ret; - ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, - DISABLE_FURTHER_CPUFREQ); + ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, 0); if (ret < 0) return NOTIFY_BAD; + no_cpufreq_access = true; return NOTIFY_DONE; } static struct cpufreq_driver s5pv210_driver = { .flags = CPUFREQ_STICKY, - .verify = s5pv210_verify_speed, - .target = s5pv210_target, + .verify = cpufreq_generic_frequency_table_verify, + .target_index = s5pv210_target, .get = s5pv210_getspeed, .init = s5pv210_cpu_init, .name = "s5pv210", |