diff options
Diffstat (limited to 'drivers/cpufreq/exynos5440-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/exynos5440-cpufreq.c | 36 |
1 files changed, 16 insertions, 20 deletions
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c index 76bef8b078cb..49b756015316 100644 --- a/drivers/cpufreq/exynos5440-cpufreq.c +++ b/drivers/cpufreq/exynos5440-cpufreq.c @@ -100,7 +100,6 @@ struct exynos_dvfs_data { struct resource *mem; int irq; struct clk *cpu_clk; - unsigned int cur_frequency; unsigned int latency; struct cpufreq_frequency_table *freq_table; unsigned int freq_count; @@ -165,7 +164,7 @@ static int init_div_table(void) return 0; } -static void exynos_enable_dvfs(void) +static void exynos_enable_dvfs(unsigned int cur_frequency) { unsigned int tmp, i, cpu; struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table; @@ -184,18 +183,18 @@ static void exynos_enable_dvfs(void) /* Set initial performance index */ for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++) - if (freq_table[i].frequency == dvfs_info->cur_frequency) + if (freq_table[i].frequency == cur_frequency) break; if (freq_table[i].frequency == CPUFREQ_TABLE_END) { dev_crit(dvfs_info->dev, "Boot up frequency not supported\n"); /* Assign the highest frequency */ i = 0; - dvfs_info->cur_frequency = freq_table[i].frequency; + cur_frequency = freq_table[i].frequency; } dev_info(dvfs_info->dev, "Setting dvfs initial frequency = %uKHZ", - dvfs_info->cur_frequency); + cur_frequency); for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) { tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4); @@ -209,11 +208,6 @@ static void exynos_enable_dvfs(void) dvfs_info->base + XMU_DVFS_CTRL); } -static unsigned int exynos_getspeed(unsigned int cpu) -{ - return dvfs_info->cur_frequency; -} - static int exynos_target(struct cpufreq_policy *policy, unsigned int index) { unsigned int tmp; @@ -222,7 +216,7 @@ static int exynos_target(struct cpufreq_policy *policy, unsigned int index) mutex_lock(&cpufreq_lock); - freqs.old = dvfs_info->cur_frequency; + freqs.old = policy->cur; freqs.new = freq_table[index].frequency; cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); @@ -250,7 +244,7 @@ static void exynos_cpufreq_work(struct work_struct *work) goto skip_work; mutex_lock(&cpufreq_lock); - freqs.old = dvfs_info->cur_frequency; + freqs.old = policy->cur; cur_pstate = __raw_readl(dvfs_info->base + XMU_P_STATUS); if (cur_pstate >> C0_3_PSTATE_VALID_SHIFT & 0x1) @@ -260,10 +254,9 @@ static void exynos_cpufreq_work(struct work_struct *work) if (likely(index < dvfs_info->freq_count)) { freqs.new = freq_table[index].frequency; - dvfs_info->cur_frequency = freqs.new; } else { dev_crit(dvfs_info->dev, "New frequency out of range\n"); - freqs.new = dvfs_info->cur_frequency; + freqs.new = freqs.old; } cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); @@ -307,15 +300,17 @@ static void exynos_sort_descend_freq_table(void) static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy) { + policy->clk = dvfs_info->cpu_clk; return cpufreq_generic_init(policy, dvfs_info->freq_table, dvfs_info->latency); } static struct cpufreq_driver exynos_driver = { - .flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION, + .flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION | + CPUFREQ_NEED_INITIAL_FREQ_CHECK, .verify = cpufreq_generic_frequency_table_verify, .target_index = exynos_target, - .get = exynos_getspeed, + .get = cpufreq_generic_get, .init = exynos_cpufreq_cpu_init, .exit = cpufreq_generic_exit, .name = CPUFREQ_NAME, @@ -335,6 +330,7 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) int ret = -EINVAL; struct device_node *np; struct resource res; + unsigned int cur_frequency; np = pdev->dev.of_node; if (!np) @@ -391,13 +387,13 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) goto err_free_table; } - dvfs_info->cur_frequency = clk_get_rate(dvfs_info->cpu_clk); - if (!dvfs_info->cur_frequency) { + cur_frequency = clk_get_rate(dvfs_info->cpu_clk); + if (!cur_frequency) { dev_err(dvfs_info->dev, "Failed to get clock rate\n"); ret = -EINVAL; goto err_free_table; } - dvfs_info->cur_frequency /= 1000; + cur_frequency /= 1000; INIT_WORK(&dvfs_info->irq_work, exynos_cpufreq_work); ret = devm_request_irq(dvfs_info->dev, dvfs_info->irq, @@ -414,7 +410,7 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) goto err_free_table; } - exynos_enable_dvfs(); + exynos_enable_dvfs(cur_frequency); ret = cpufreq_register_driver(&exynos_driver); if (ret) { dev_err(dvfs_info->dev, |