1 files changed, 50 insertions, 58 deletions

diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
index 518606adf14e..052ca7cd2f4f 100644
--- a/drivers/cpufreq/mediatek-cpufreq.c
+++ b/drivers/cpufreq/mediatek-cpufreq.c
@@ -123,7 +123,7 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info,
 						      soc_data->sram_max_volt);
 				return ret;
 			}
-		} else if (pre_vproc > new_vproc) {
+		} else {
 			vproc = max(new_vproc,
 				    pre_vsram - soc_data->max_volt_shift);
 			ret = regulator_set_voltage(proc_reg, vproc,
@@ -320,7 +320,6 @@ static int mtk_cpufreq_opp_notifier(struct notifier_block *nb,
 	struct dev_pm_opp *new_opp;
 	struct mtk_cpu_dvfs_info *info;
 	unsigned long freq, volt;
-	struct cpufreq_policy *policy;
 	int ret = 0;
 
 	info = container_of(nb, struct mtk_cpu_dvfs_info, opp_nb);
@@ -353,12 +352,12 @@ static int mtk_cpufreq_opp_notifier(struct notifier_block *nb,
 			}
 
 			dev_pm_opp_put(new_opp);
-			policy = cpufreq_cpu_get(info->opp_cpu);
-			if (policy) {
+
+			struct cpufreq_policy *policy __free(put_cpufreq_policy)
+				= cpufreq_cpu_get(info->opp_cpu);
+			if (policy)
 				cpufreq_driver_target(policy, freq / 1000,
 						      CPUFREQ_RELATION_L);
-				cpufreq_cpu_put(policy);
-			}
 		}
 	}
 
@@ -390,27 +389,24 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	int ret;
 
 	cpu_dev = get_cpu_device(cpu);
-	if (!cpu_dev) {
-		dev_err(cpu_dev, "failed to get cpu%d device\n", cpu);
-		return -ENODEV;
-	}
+	if (!cpu_dev)
+		return dev_err_probe(cpu_dev, -ENODEV, "failed to get cpu%d device\n", cpu);
 	info->cpu_dev = cpu_dev;
 
 	info->ccifreq_bound = false;
 	if (info->soc_data->ccifreq_supported) {
 		info->cci_dev = of_get_cci(info->cpu_dev);
-		if (IS_ERR(info->cci_dev)) {
-			ret = PTR_ERR(info->cci_dev);
-			dev_err(cpu_dev, "cpu%d: failed to get cci device\n", cpu);
-			return -ENODEV;
-		}
+		if (IS_ERR(info->cci_dev))
+			return dev_err_probe(cpu_dev, PTR_ERR(info->cci_dev),
+					     "cpu%d: failed to get cci device\n",
+					     cpu);
 	}
 
 	info->cpu_clk = clk_get(cpu_dev, "cpu");
 	if (IS_ERR(info->cpu_clk)) {
 		ret = PTR_ERR(info->cpu_clk);
-		return dev_err_probe(cpu_dev, ret,
-				     "cpu%d: failed to get cpu clk\n", cpu);
+		dev_err_probe(cpu_dev, ret, "cpu%d: failed to get cpu clk\n", cpu);
+		goto out_put_cci_dev;
 	}
 
 	info->inter_clk = clk_get(cpu_dev, "intermediate");
@@ -431,7 +427,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 
 	ret = regulator_enable(info->proc_reg);
 	if (ret) {
-		dev_warn(cpu_dev, "cpu%d: failed to enable vproc\n", cpu);
+		dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable vproc\n", cpu);
 		goto out_free_proc_reg;
 	}
 
@@ -439,14 +435,17 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	info->sram_reg = regulator_get_optional(cpu_dev, "sram");
 	if (IS_ERR(info->sram_reg)) {
 		ret = PTR_ERR(info->sram_reg);
-		if (ret == -EPROBE_DEFER)
+		if (ret == -EPROBE_DEFER) {
+			dev_err_probe(cpu_dev, ret,
+				      "cpu%d: Failed to get sram regulator\n", cpu);
 			goto out_disable_proc_reg;
+		}
 
 		info->sram_reg = NULL;
 	} else {
 		ret = regulator_enable(info->sram_reg);
 		if (ret) {
-			dev_warn(cpu_dev, "cpu%d: failed to enable vsram\n", cpu);
+			dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable vsram\n", cpu);
 			goto out_free_sram_reg;
 		}
 	}
@@ -454,31 +453,34 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	/* Get OPP-sharing information from "operating-points-v2" bindings */
 	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, &info->cpus);
 	if (ret) {
-		dev_err(cpu_dev,
+		dev_err_probe(cpu_dev, ret,
 			"cpu%d: failed to get OPP-sharing information\n", cpu);
 		goto out_disable_sram_reg;
 	}
 
 	ret = dev_pm_opp_of_cpumask_add_table(&info->cpus);
 	if (ret) {
-		dev_warn(cpu_dev, "cpu%d: no OPP table\n", cpu);
+		dev_err_probe(cpu_dev, ret, "cpu%d: no OPP table\n", cpu);
 		goto out_disable_sram_reg;
 	}
 
 	ret = clk_prepare_enable(info->cpu_clk);
-	if (ret)
+	if (ret) {
+		dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable cpu clk\n", cpu);
 		goto out_free_opp_table;
+	}
 
 	ret = clk_prepare_enable(info->inter_clk);
-	if (ret)
+	if (ret) {
+		dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable inter clk\n", cpu);
 		goto out_disable_mux_clock;
+	}
 
 	if (info->soc_data->ccifreq_supported) {
 		info->vproc_on_boot = regulator_get_voltage(info->proc_reg);
 		if (info->vproc_on_boot < 0) {
-			ret = info->vproc_on_boot;
-			dev_err(info->cpu_dev,
-				"invalid Vproc value: %d\n", info->vproc_on_boot);
+			ret = dev_err_probe(info->cpu_dev, info->vproc_on_boot,
+					    "invalid Vproc value\n");
 			goto out_disable_inter_clock;
 		}
 	}
@@ -487,8 +489,8 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	rate = clk_get_rate(info->inter_clk);
 	opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
 	if (IS_ERR(opp)) {
-		dev_err(cpu_dev, "cpu%d: failed to get intermediate opp\n", cpu);
-		ret = PTR_ERR(opp);
+		ret = dev_err_probe(cpu_dev, PTR_ERR(opp),
+				    "cpu%d: failed to get intermediate opp\n", cpu);
 		goto out_disable_inter_clock;
 	}
 	info->intermediate_voltage = dev_pm_opp_get_voltage(opp);
@@ -501,7 +503,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	info->opp_nb.notifier_call = mtk_cpufreq_opp_notifier;
 	ret = dev_pm_opp_register_notifier(cpu_dev, &info->opp_nb);
 	if (ret) {
-		dev_err(cpu_dev, "cpu%d: failed to register opp notifier\n", cpu);
+		dev_err_probe(cpu_dev, ret, "cpu%d: failed to register opp notifier\n", cpu);
 		goto out_disable_inter_clock;
 	}
 
@@ -551,6 +553,10 @@ out_free_inter_clock:
 out_free_mux_clock:
 	clk_put(info->cpu_clk);
 
+out_put_cci_dev:
+	if (info->soc_data->ccifreq_supported)
+		put_device(info->cci_dev);
+
 	return ret;
 }
 
@@ -568,6 +574,8 @@ static void mtk_cpu_dvfs_info_release(struct mtk_cpu_dvfs_info *info)
 	clk_put(info->inter_clk);
 	dev_pm_opp_of_cpumask_remove_table(&info->cpus);
 	dev_pm_opp_unregister_notifier(info->cpu_dev, &info->opp_nb);
+	if (info->soc_data->ccifreq_supported)
+		put_device(info->cci_dev);
 }
 
 static int mtk_cpufreq_init(struct cpufreq_policy *policy)
@@ -599,13 +607,11 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy)
 	return 0;
 }
 
-static int mtk_cpufreq_exit(struct cpufreq_policy *policy)
+static void mtk_cpufreq_exit(struct cpufreq_policy *policy)
 {
 	struct mtk_cpu_dvfs_info *info = policy->driver_data;
 
 	dev_pm_opp_free_cpufreq_table(info->cpu_dev, &policy->freq_table);
-
-	return 0;
 }
 
 static struct cpufreq_driver mtk_cpufreq_driver = {
@@ -619,7 +625,6 @@ static struct cpufreq_driver mtk_cpufreq_driver = {
 	.exit = mtk_cpufreq_exit,
 	.register_em = cpufreq_register_em_with_opp,
 	.name = "mtk-cpufreq",
-	.attr = cpufreq_generic_attr,
 };
 
 static int mtk_cpufreq_probe(struct platform_device *pdev)
@@ -629,38 +634,33 @@ static int mtk_cpufreq_probe(struct platform_device *pdev)
 	int cpu, ret;
 
 	data = dev_get_platdata(&pdev->dev);
-	if (!data) {
-		dev_err(&pdev->dev,
-			"failed to get mtk cpufreq platform data\n");
-		return -ENODEV;
-	}
+	if (!data)
+		return dev_err_probe(&pdev->dev, -ENODEV,
+				     "failed to get mtk cpufreq platform data\n");
 
-	for_each_possible_cpu(cpu) {
+	for_each_present_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;
+			ret = dev_err_probe(&pdev->dev, -ENOMEM,
+					    "Failed to allocate dvfs_info\n");
 			goto release_dvfs_info_list;
 		}
 
 		info->soc_data = data;
 		ret = mtk_cpu_dvfs_info_init(info, cpu);
-		if (ret) {
-			dev_err(&pdev->dev,
-				"failed to initialize dvfs info for cpu%d\n",
-				cpu);
+		if (ret)
 			goto release_dvfs_info_list;
-		}
 
 		list_add(&info->list_head, &dvfs_info_list);
 	}
 
 	ret = cpufreq_register_driver(&mtk_cpufreq_driver);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to register mtk cpufreq driver\n");
+		dev_err_probe(&pdev->dev, ret, "failed to register mtk cpufreq driver\n");
 		goto release_dvfs_info_list;
 	}
 
@@ -744,7 +744,7 @@ static const struct mtk_cpufreq_platform_data mt8516_platform_data = {
 };
 
 /* List of machines supported by this driver */
-static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
+static const struct of_device_id mtk_cpufreq_machines[] __initconst __maybe_unused = {
 	{ .compatible = "mediatek,mt2701", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt2712", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt7622", .data = &mt7622_platform_data },
@@ -764,22 +764,14 @@ MODULE_DEVICE_TABLE(of, mtk_cpufreq_machines);
 
 static int __init mtk_cpufreq_driver_init(void)
 {
-	struct device_node *np;
-	const struct of_device_id *match;
 	const struct mtk_cpufreq_platform_data *data;
 	int err;
 
-	np = of_find_node_by_path("/");
-	if (!np)
-		return -ENODEV;
-
-	match = of_match_node(mtk_cpufreq_machines, np);
-	of_node_put(np);
-	if (!match) {
+	data = of_machine_get_match_data(mtk_cpufreq_machines);
+	if (!data) {
 		pr_debug("Machine is not compatible with mtk-cpufreq\n");
 		return -ENODEV;
 	}
-	data = match->data;
 
 	err = platform_driver_register(&mtk_cpufreq_platdrv);
 	if (err)