Merge tag 'cpufreq-arm-updates-6.18-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Merge CPUFreq fixes for 6.18 from Viresh Kumar:

"- Update frequency for all tegra CPUs (Aaron Kling).

 - Fix device leak in mediatek driver (Johan Hovold).

 - Rust cpufreq helper cleanup (Thorsten Blum)."

* tag 'cpufreq-arm-updates-6.18-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: tegra186: Initialize all cores to max frequencies
  cpufreq: tegra186: Set target frequency for all cpus in policy
  rust: cpufreq: streamline find_supply_names
  cpufreq: mediatek: fix device leak on probe failure

Author: rafaeljw

drivers/cpufreq/mediatek-cpufreq.c

@@ -403,9 +403,11 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	}
 
 	info->cpu_clk = clk_get(cpu_dev, "cpu");
-	if (IS_ERR(info->cpu_clk))
-		return dev_err_probe(cpu_dev, PTR_ERR(info->cpu_clk),
-				     "cpu%d: failed to get cpu clk\n", cpu);
+	if (IS_ERR(info->cpu_clk)) {
+		ret = PTR_ERR(info->cpu_clk);
+		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");
 	if (IS_ERR(info->inter_clk)) {
@@ -551,6 +553,10 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 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)

drivers/cpufreq/rcpufreq_dt.rs

@@ -28,15 +28,11 @@ fn find_supply_name_exact(dev: &Device, name: &str) -> Option<CString> {
 /// Finds supply name for the CPU from DT.
 fn find_supply_names(dev: &Device, cpu: cpu::CpuId) -> Option<KVec<CString>> {
     // Try "cpu0" for older DTs, fallback to "cpu".
-    let name = (cpu.as_u32() == 0)
+    (cpu.as_u32() == 0)
         .then(|| find_supply_name_exact(dev, "cpu0"))
         .flatten()
-        .or_else(|| find_supply_name_exact(dev, "cpu"))?;
-
-    let mut list = KVec::with_capacity(1, GFP_KERNEL).ok()?;
-    list.push(name, GFP_KERNEL).ok()?;
-
-    Some(list)
+        .or_else(|| find_supply_name_exact(dev, "cpu"))
+        .and_then(|name| kernel::kvec![name].ok())
 }
 
 /// Represents the cpufreq dt device.

drivers/cpufreq/tegra186-cpufreq.c

@@ -93,10 +93,14 @@ static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
 {
 	struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
 	struct cpufreq_frequency_table *tbl = policy->freq_table + index;
-	unsigned int edvd_offset = data->cpus[policy->cpu].edvd_offset;
+	unsigned int edvd_offset;
 	u32 edvd_val = tbl->driver_data;
+	u32 cpu;
 
-	writel(edvd_val, data->regs + edvd_offset);
+	for_each_cpu(cpu, policy->cpus) {
+		edvd_offset = data->cpus[cpu].edvd_offset;
+		writel(edvd_val, data->regs + edvd_offset);
+	}
 
 	return 0;
 }
@@ -132,13 +136,14 @@ static struct cpufreq_driver tegra186_cpufreq_driver = {
 
 static struct cpufreq_frequency_table *init_vhint_table(
 	struct platform_device *pdev, struct tegra_bpmp *bpmp,
-	struct tegra186_cpufreq_cluster *cluster, unsigned int cluster_id)
+	struct tegra186_cpufreq_cluster *cluster, unsigned int cluster_id,
+	int *num_rates)
 {
 	struct cpufreq_frequency_table *table;
 	struct mrq_cpu_vhint_request req;
 	struct tegra_bpmp_message msg;
 	struct cpu_vhint_data *data;
-	int err, i, j, num_rates = 0;
+	int err, i, j;
 	dma_addr_t phys;
 	void *virt;
 
@@ -168,6 +173,7 @@ static struct cpufreq_frequency_table *init_vhint_table(
 		goto free;
 	}
 
+	*num_rates = 0;
 	for (i = data->vfloor; i <= data->vceil; i++) {
 		u16 ndiv = data->ndiv[i];
 
@@ -178,10 +184,10 @@ static struct cpufreq_frequency_table *init_vhint_table(
 		if (i > 0 && ndiv == data->ndiv[i - 1])
 			continue;
 
-		num_rates++;
+		(*num_rates)++;
 	}
 
-	table = devm_kcalloc(&pdev->dev, num_rates + 1, sizeof(*table),
+	table = devm_kcalloc(&pdev->dev, *num_rates + 1, sizeof(*table),
 			     GFP_KERNEL);
 	if (!table) {
 		table = ERR_PTR(-ENOMEM);
@@ -223,7 +229,9 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev)
 {
 	struct tegra186_cpufreq_data *data;
 	struct tegra_bpmp *bpmp;
-	unsigned int i = 0, err;
+	unsigned int i = 0, err, edvd_offset;
+	int num_rates = 0;
+	u32 edvd_val, cpu;
 
 	data = devm_kzalloc(&pdev->dev,
 			    struct_size(data, clusters, TEGRA186_NUM_CLUSTERS),
@@ -246,10 +254,21 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev)
 	for (i = 0; i < TEGRA186_NUM_CLUSTERS; i++) {
 		struct tegra186_cpufreq_cluster *cluster = &data->clusters[i];
 
-		cluster->table = init_vhint_table(pdev, bpmp, cluster, i);
+		cluster->table = init_vhint_table(pdev, bpmp, cluster, i, &num_rates);
 		if (IS_ERR(cluster->table)) {
 			err = PTR_ERR(cluster->table);
 			goto put_bpmp;
+		} else if (!num_rates) {
+			err = -EINVAL;
+			goto put_bpmp;
+		}
+
+		for (cpu = 0; cpu < ARRAY_SIZE(tegra186_cpus); cpu++) {
+			if (data->cpus[cpu].bpmp_cluster_id == i) {
+				edvd_val = cluster->table[num_rates - 1].driver_data;
+				edvd_offset = data->cpus[cpu].edvd_offset;
+				writel(edvd_val, data->regs + edvd_offset);
+			}
 		}
 	}