diff options
Diffstat (limited to 'drivers/cpufreq/mt8173-cpufreq.c')
-rw-r--r-- | drivers/cpufreq/mt8173-cpufreq.c | 124 |
1 files changed, 98 insertions, 26 deletions
diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c index 83001dc..fd601b9 100644 --- a/drivers/cpufreq/mt8173-cpufreq.c +++ b/drivers/cpufreq/mt8173-cpufreq.c @@ -41,16 +41,35 @@ * the original PLL becomes stable at target frequency. */ struct mtk_cpu_dvfs_info { + struct cpumask cpus; struct device *cpu_dev; struct regulator *proc_reg; struct regulator *sram_reg; struct clk *cpu_clk; struct clk *inter_clk; struct thermal_cooling_device *cdev; + struct list_head list_head; int intermediate_voltage; bool need_voltage_tracking; }; +static LIST_HEAD(dvfs_info_list); + +static struct mtk_cpu_dvfs_info *mtk_cpu_dvfs_info_lookup(int cpu) +{ + struct mtk_cpu_dvfs_info *info; + struct list_head *list; + + list_for_each(list, &dvfs_info_list) { + info = list_entry(list, struct mtk_cpu_dvfs_info, list_head); + + if (cpumask_test_cpu(cpu, &info->cpus)) + return info; + } + + return NULL; +} + static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, int new_vproc) { @@ -59,7 +78,10 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, int old_vproc, old_vsram, new_vsram, vsram, vproc, ret; old_vproc = regulator_get_voltage(proc_reg); - old_vsram = regulator_get_voltage(sram_reg); + if (old_vproc < 0) { + pr_err("%s: invalid Vproc value: %d\n", __func__, old_vproc); + return old_vproc; + } /* Vsram should not exceed the maximum allowed voltage of SoC. */ new_vsram = min(new_vproc + MIN_VOLT_SHIFT, MAX_VOLT_LIMIT); @@ -72,7 +94,17 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, */ do { old_vsram = regulator_get_voltage(sram_reg); + if (old_vsram < 0) { + pr_err("%s: invalid Vsram value: %d\n", + __func__, old_vsram); + return old_vsram; + } old_vproc = regulator_get_voltage(proc_reg); + if (old_vproc < 0) { + pr_err("%s: invalid Vproc value: %d\n", + __func__, old_vproc); + return old_vproc; + } vsram = min(new_vsram, old_vproc + MAX_VOLT_SHIFT); @@ -117,7 +149,17 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, */ do { old_vproc = regulator_get_voltage(proc_reg); + if (old_vproc < 0) { + pr_err("%s: invalid Vproc value: %d\n", + __func__, old_vproc); + return old_vproc; + } old_vsram = regulator_get_voltage(sram_reg); + if (old_vsram < 0) { + pr_err("%s: invalid Vsram value: %d\n", + __func__, old_vsram); + return old_vsram; + } vproc = max(new_vproc, old_vsram - MAX_VOLT_SHIFT); ret = regulator_set_voltage(proc_reg, vproc, @@ -185,6 +227,10 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, old_freq_hz = clk_get_rate(cpu_clk); old_vproc = regulator_get_voltage(info->proc_reg); + if (old_vproc < 0) { + pr_err("%s: invalid Vproc value: %d\n", __func__, old_vproc); + return old_vproc; + } freq_hz = freq_table[index].frequency * 1000; @@ -375,6 +421,9 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu) */ info->need_voltage_tracking = !IS_ERR(sram_reg); + /* CPUs in the same cluster share a clock and power domain. */ + cpumask_copy(&info->cpus, &cpu_topology[cpu].core_sibling); + return 0; out_free_opp_table: @@ -413,22 +462,18 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy) struct cpufreq_frequency_table *freq_table; int ret; - info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - ret = mtk_cpu_dvfs_info_init(info, policy->cpu); - if (ret) { - pr_err("%s failed to initialize dvfs info for cpu%d\n", - __func__, policy->cpu); - goto out_free_dvfs_info; + info = mtk_cpu_dvfs_info_lookup(policy->cpu); + if (!info) { + pr_err("dvfs info for cpu%d is not initialized.\n", + policy->cpu); + return -EINVAL; } ret = dev_pm_opp_init_cpufreq_table(info->cpu_dev, &freq_table); if (ret) { pr_err("failed to init cpufreq table for cpu%d: %d\n", policy->cpu, ret); - goto out_release_dvfs_info; + return ret; } ret = cpufreq_table_validate_and_show(policy, freq_table); @@ -437,8 +482,7 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy) goto out_free_cpufreq_table; } - /* CPUs in the same cluster share a clock and power domain. */ - cpumask_copy(policy->cpus, &cpu_topology[policy->cpu].core_sibling); + cpumask_copy(policy->cpus, &info->cpus); policy->driver_data = info; policy->clk = info->cpu_clk; @@ -446,13 +490,6 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy) out_free_cpufreq_table: dev_pm_opp_free_cpufreq_table(info->cpu_dev, &freq_table); - -out_release_dvfs_info: - mtk_cpu_dvfs_info_release(info); - -out_free_dvfs_info: - kfree(info); - return ret; } @@ -462,14 +499,13 @@ static int mtk_cpufreq_exit(struct cpufreq_policy *policy) cpufreq_cooling_unregister(info->cdev); dev_pm_opp_free_cpufreq_table(info->cpu_dev, &policy->freq_table); - mtk_cpu_dvfs_info_release(info); - kfree(info); return 0; } static struct cpufreq_driver mt8173_cpufreq_driver = { - .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, + .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK | + CPUFREQ_HAVE_GOVERNOR_PER_POLICY, .verify = cpufreq_generic_frequency_table_verify, .target_index = mtk_cpufreq_set_target, .get = cpufreq_generic_get, @@ -482,11 +518,47 @@ static struct cpufreq_driver mt8173_cpufreq_driver = { static int mt8173_cpufreq_probe(struct platform_device *pdev) { - int ret; + struct mtk_cpu_dvfs_info *info; + struct list_head *list, *tmp; + int cpu, ret; + + for_each_possible_cpu(cpu) { + info = mtk_cpu_dvfs_info_lookup(cpu); + if (info) + continue; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) { + ret = -ENOMEM; + goto release_dvfs_info_list; + } + + ret = mtk_cpu_dvfs_info_init(info, cpu); + if (ret) { + dev_err(&pdev->dev, + "failed to initialize dvfs info for cpu%d\n", + cpu); + goto release_dvfs_info_list; + } + + list_add(&info->list_head, &dvfs_info_list); + } ret = cpufreq_register_driver(&mt8173_cpufreq_driver); - if (ret) - pr_err("failed to register mtk cpufreq driver\n"); + if (ret) { + dev_err(&pdev->dev, "failed to register mtk cpufreq driver\n"); + goto release_dvfs_info_list; + } + + return 0; + +release_dvfs_info_list: + list_for_each_safe(list, tmp, &dvfs_info_list) { + info = list_entry(list, struct mtk_cpu_dvfs_info, list_head); + + mtk_cpu_dvfs_info_release(info); + list_del(list); + } return ret; } |