Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Pull ARM cpufreq updates for 5.10-rc1 from Viresh Kumar:

"- STI cpufreq driver updates to allow new hardware (Alain Volmat).

 - Minor tegra driver fixes around initial frequency mismatch warnings (Jon
   Hunter).

 - dev_err simplification for s5pv210 driver (Krzysztof Kozlowski).

 - Qcom driver updates to allow new hardware and minor cleanup (Manivannan
   Sadhasivam and Matthias Kaehlcke).

 - Add missing MODULE_DEVICE_TABLE for armada driver (Pali Rohár).

 - Improved defer-probe handling in cpufreq-dt driver (Stephan Gerhold).

 - Call dev_pm_opp_of_remove_table() unconditionally for imx driver (Viresh
   Kumar)."

* 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: qcom: Don't add frequencies without an OPP
  cpufreq: qcom-hw: Add cpufreq support for SM8250 SoC
  cpufreq: qcom-hw: Use of_device_get_match_data for offsets and row size
  cpufreq: qcom-hw: Use devm_platform_ioremap_resource() to simplify code
  dt-bindings: cpufreq: cpufreq-qcom-hw: Document Qcom EPSS compatible
  cpufreq: qcom-hw: Make use of cpufreq driver_data for passing pdev
  cpufreq: armada-37xx: Add missing MODULE_DEVICE_TABLE
  cpufreq: arm: Kconfig: add CPUFREQ_DT depend for STI CPUFREQ
  cpufreq: dt-platdev: Blacklist st,stih418 SoC
  cpufreq: sti-cpufreq: add stih418 support
  cpufreq: s5pv210: Use dev_err instead of pr_err in probe
  cpufreq: s5pv210: Simplify with dev_err_probe()
  cpufreq: tegra186: Fix initial frequency
  cpufreq: dt: Refactor initialization to handle probe deferral properly
  opp: Handle multiple calls for same OPP table in _of_add_opp_table_v1()
  cpufreq: imx6q: Unconditionally call dev_pm_opp_of_remove_table()
  opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER

Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt

@@ -8,7 +8,7 @@ Properties:
 - compatible
 	Usage:		required
 	Value type:	<string>
-	Definition:	must be "qcom,cpufreq-hw".
+	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
 
 - clocks
 	Usage:		required

drivers/base/power/domain.c

@@ -2044,6 +2044,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 	if (genpd->set_performance_state) {
 		ret = dev_pm_opp_of_add_table(&genpd->dev);
 		if (ret) {
+			if (ret != -EPROBE_DEFER)
 				dev_err(&genpd->dev, "Failed to add OPP table: %d\n",
 					ret);
 			goto unlock;
@@ -2054,7 +2055,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 		 * state.
 		 */
 		genpd->opp_table = dev_pm_opp_get_opp_table(&genpd->dev);
-		WARN_ON(!genpd->opp_table);
+		WARN_ON(IS_ERR(genpd->opp_table));
 	}
 
 	ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
@@ -2111,6 +2112,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 		if (genpd->set_performance_state) {
 			ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i);
 			if (ret) {
+				if (ret != -EPROBE_DEFER)
 					dev_err(&genpd->dev, "Failed to add OPP table for index %d: %d\n",
 						i, ret);
 				goto error;
@@ -2121,7 +2123,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 			 * performance state.
 			 */
 			genpd->opp_table = dev_pm_opp_get_opp_table_indexed(&genpd->dev, i);
-			WARN_ON(!genpd->opp_table);
+			WARN_ON(IS_ERR(genpd->opp_table));
 		}
 
 		genpd->provider = &np->fwnode;

drivers/cpufreq/Kconfig.arm

@@ -283,7 +283,7 @@ config ARM_SPEAR_CPUFREQ
 
 config ARM_STI_CPUFREQ
 	tristate "STi CPUFreq support"
-	depends on SOC_STIH407
+	depends on CPUFREQ_DT && SOC_STIH407
 	help
 	  This driver uses the generic OPP framework to match the running
 	  platform with a predefined set of suitable values.  If not provided

drivers/cpufreq/armada-37xx-cpufreq.c

@@ -484,6 +484,12 @@ static int __init armada37xx_cpufreq_driver_init(void)
 /* late_initcall, to guarantee the driver is loaded after A37xx clock driver */
 late_initcall(armada37xx_cpufreq_driver_init);
 
+static const struct of_device_id __maybe_unused armada37xx_cpufreq_of_match[] = {
+	{ .compatible = "marvell,armada-3700-nb-pm" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, armada37xx_cpufreq_of_match);
+
 MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
 MODULE_DESCRIPTION("Armada 37xx cpufreq driver");
 MODULE_LICENSE("GPL");

drivers/cpufreq/cpufreq-dt-platdev.c

@@ -137,6 +137,7 @@ static const struct of_device_id blacklist[] __initconst = {
 
 	{ .compatible = "st,stih407", },
 	{ .compatible = "st,stih410", },
+	{ .compatible = "st,stih418", },
 
 	{ .compatible = "sigma,tango4", },
 

drivers/cpufreq/cpufreq-dt.c

@@ -13,6 +13,7 @@
 #include <linux/cpufreq.h>
 #include <linux/cpumask.h>
 #include <linux/err.h>
+#include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/pm_opp.h>
@@ -24,18 +25,35 @@
 #include "cpufreq-dt.h"
 
 struct private_data {
-	struct opp_table *opp_table;
+	struct list_head node;
+
+	cpumask_var_t cpus;
 	struct device *cpu_dev;
-	const char *reg_name;
+	struct opp_table *opp_table;
+	struct opp_table *reg_opp_table;
 	bool have_static_opps;
 };
 
+static LIST_HEAD(priv_list);
+
 static struct freq_attr *cpufreq_dt_attr[] = {
 	&cpufreq_freq_attr_scaling_available_freqs,
 	NULL,   /* Extra space for boost-attr if required */
 	NULL,
 };
 
+static struct private_data *cpufreq_dt_find_data(int cpu)
+{
+	struct private_data *priv;
+
+	list_for_each_entry(priv, &priv_list, node) {
+		if (cpumask_test_cpu(cpu, priv->cpus))
+			return priv;
+	}
+
+	return NULL;
+}
+
 static int set_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	struct private_data *priv = policy->driver_data;
@@ -82,83 +100,24 @@ static const char *find_supply_name(struct device *dev)
 	return name;
 }
 
-static int resources_available(void)
-{
-	struct device *cpu_dev;
-	struct regulator *cpu_reg;
-	struct clk *cpu_clk;
-	int ret = 0;
-	const char *name;
-
-	cpu_dev = get_cpu_device(0);
-	if (!cpu_dev) {
-		pr_err("failed to get cpu0 device\n");
-		return -ENODEV;
-	}
-
-	cpu_clk = clk_get(cpu_dev, NULL);
-	ret = PTR_ERR_OR_ZERO(cpu_clk);
-	if (ret) {
-		/*
-		 * If cpu's clk node is present, but clock is not yet
-		 * registered, we should try defering probe.
-		 */
-		if (ret == -EPROBE_DEFER)
-			dev_dbg(cpu_dev, "clock not ready, retry\n");
-		else
-			dev_err(cpu_dev, "failed to get clock: %d\n", ret);
-
-		return ret;
-	}
-
-	clk_put(cpu_clk);
-
-	ret = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);
-	if (ret)
-		return ret;
-
-	name = find_supply_name(cpu_dev);
-	/* Platform doesn't require regulator */
-	if (!name)
-		return 0;
-
-	cpu_reg = regulator_get_optional(cpu_dev, name);
-	ret = PTR_ERR_OR_ZERO(cpu_reg);
-	if (ret) {
-		/*
-		 * If cpu's regulator supply node is present, but regulator is
-		 * not yet registered, we should try defering probe.
-		 */
-		if (ret == -EPROBE_DEFER)
-			dev_dbg(cpu_dev, "cpu0 regulator not ready, retry\n");
-		else
-			dev_dbg(cpu_dev, "no regulator for cpu0: %d\n", ret);
-
-		return ret;
-	}
-
-	regulator_put(cpu_reg);
-	return 0;
-}
-
 static int cpufreq_init(struct cpufreq_policy *policy)
 {
 	struct cpufreq_frequency_table *freq_table;
-	struct opp_table *opp_table = NULL;
 	struct private_data *priv;
 	struct device *cpu_dev;
 	struct clk *cpu_clk;
 	unsigned int transition_latency;
-	bool fallback = false;
-	const char *name;
 	int ret;
 
-	cpu_dev = get_cpu_device(policy->cpu);
-	if (!cpu_dev) {
-		pr_err("failed to get cpu%d device\n", policy->cpu);
+	priv = cpufreq_dt_find_data(policy->cpu);
+	if (!priv) {
+		pr_err("failed to find data for cpu%d\n", policy->cpu);
 		return -ENODEV;
 	}
 
+	cpu_dev = priv->cpu_dev;
+	cpumask_copy(policy->cpus, priv->cpus);
+
 	cpu_clk = clk_get(cpu_dev, NULL);
 	if (IS_ERR(cpu_clk)) {
 		ret = PTR_ERR(cpu_clk);
@@ -166,45 +125,6 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 		return ret;
 	}
 
-	/* Get OPP-sharing information from "operating-points-v2" bindings */
-	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus);
-	if (ret) {
-		if (ret != -ENOENT)
-			goto out_put_clk;
-
-		/*
-		 * operating-points-v2 not supported, fallback to old method of
-		 * finding shared-OPPs for backward compatibility if the
-		 * platform hasn't set sharing CPUs.
-		 */
-		if (dev_pm_opp_get_sharing_cpus(cpu_dev, policy->cpus))
-			fallback = true;
-	}
-
-	/*
-	 * OPP layer will be taking care of regulators now, but it needs to know
-	 * the name of the regulator first.
-	 */
-	name = find_supply_name(cpu_dev);
-	if (name) {
-		opp_table = dev_pm_opp_set_regulators(cpu_dev, &name, 1);
-		if (IS_ERR(opp_table)) {
-			ret = PTR_ERR(opp_table);
-			dev_err(cpu_dev, "Failed to set regulator for cpu%d: %d\n",
-				policy->cpu, ret);
-			goto out_put_clk;
-		}
-	}
-
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		ret = -ENOMEM;
-		goto out_put_regulator;
-	}
-
-	priv->reg_name = name;
-	priv->opp_table = opp_table;
-
 	/*
 	 * Initialize OPP tables for all policy->cpus. They will be shared by
 	 * all CPUs which have marked their CPUs shared with OPP bindings.
@@ -224,31 +144,17 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 	 */
 	ret = dev_pm_opp_get_opp_count(cpu_dev);
 	if (ret <= 0) {
-		dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
-		ret = -EPROBE_DEFER;
+		dev_err(cpu_dev, "OPP table can't be empty\n");
+		ret = -ENODEV;
 		goto out_free_opp;
 	}
 
-	if (fallback) {
-		cpumask_setall(policy->cpus);
-
-		/*
-		 * OPP tables are initialized only for policy->cpu, do it for
-		 * others as well.
-		 */
-		ret = dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus);
-		if (ret)
-			dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",
-				__func__, ret);
-	}
-
 	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
 	if (ret) {
 		dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
 		goto out_free_opp;
 	}
 
-	priv->cpu_dev = cpu_dev;
 	policy->driver_data = priv;
 	policy->clk = cpu_clk;
 	policy->freq_table = freq_table;
@@ -280,11 +186,6 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 out_free_opp:
 	if (priv->have_static_opps)
 		dev_pm_opp_of_cpumask_remove_table(policy->cpus);
-	kfree(priv);
-out_put_regulator:
-	if (name)
-		dev_pm_opp_put_regulators(opp_table);
-out_put_clk:
 	clk_put(cpu_clk);
 
 	return ret;
@@ -312,12 +213,7 @@ static int cpufreq_exit(struct cpufreq_policy *policy)
 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
 	if (priv->have_static_opps)
 		dev_pm_opp_of_cpumask_remove_table(policy->related_cpus);
-	if (priv->reg_name)
-		dev_pm_opp_put_regulators(priv->opp_table);
-
 	clk_put(policy->clk);
-	kfree(priv);
-
 	return 0;
 }
 
@@ -336,21 +232,119 @@ static struct cpufreq_driver dt_cpufreq_driver = {
 	.suspend = cpufreq_generic_suspend,
 };
 
-static int dt_cpufreq_probe(struct platform_device *pdev)
+static int dt_cpufreq_early_init(struct device *dev, int cpu)
 {
-	struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev);
+	struct private_data *priv;
+	struct device *cpu_dev;
+	const char *reg_name;
 	int ret;
 
+	/* Check if this CPU is already covered by some other policy */
+	if (cpufreq_dt_find_data(cpu))
+		return 0;
+
+	cpu_dev = get_cpu_device(cpu);
+	if (!cpu_dev)
+		return -EPROBE_DEFER;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	if (!alloc_cpumask_var(&priv->cpus, GFP_KERNEL))
+		return -ENOMEM;
+
+	priv->cpu_dev = cpu_dev;
+
+	/* Try to get OPP table early to ensure resources are available */
+	priv->opp_table = dev_pm_opp_get_opp_table(cpu_dev);
+	if (IS_ERR(priv->opp_table)) {
+		ret = PTR_ERR(priv->opp_table);
+		if (ret != -EPROBE_DEFER)
+			dev_err(cpu_dev, "failed to get OPP table: %d\n", ret);
+		goto free_cpumask;
+	}
+
 	/*
-	 * All per-cluster (CPUs sharing clock/voltages) initialization is done
-	 * from ->init(). In probe(), we just need to make sure that clk and
-	 * regulators are available. Else defer probe and retry.
-	 *
-	 * FIXME: Is checking this only for CPU0 sufficient ?
+	 * OPP layer will be taking care of regulators now, but it needs to know
+	 * the name of the regulator first.
 	 */
-	ret = resources_available();
+	reg_name = find_supply_name(cpu_dev);
+	if (reg_name) {
+		priv->reg_opp_table = dev_pm_opp_set_regulators(cpu_dev,
+								&reg_name, 1);
+		if (IS_ERR(priv->reg_opp_table)) {
+			ret = PTR_ERR(priv->reg_opp_table);
+			if (ret != -EPROBE_DEFER)
+				dev_err(cpu_dev, "failed to set regulators: %d\n",
+					ret);
+			goto put_table;
+		}
+	}
+
+	/* Find OPP sharing information so we can fill pri->cpus here */
+	/* Get OPP-sharing information from "operating-points-v2" bindings */
+	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, priv->cpus);
+	if (ret) {
+		if (ret != -ENOENT)
+			goto put_reg;
+
+		/*
+		 * operating-points-v2 not supported, fallback to all CPUs share
+		 * OPP for backward compatibility if the platform hasn't set
+		 * sharing CPUs.
+		 */
+		if (dev_pm_opp_get_sharing_cpus(cpu_dev, priv->cpus)) {
+			cpumask_setall(priv->cpus);
+
+			/*
+			 * OPP tables are initialized only for cpu, do it for
+			 * others as well.
+			 */
+			ret = dev_pm_opp_set_sharing_cpus(cpu_dev, priv->cpus);
 			if (ret)
+				dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",
+					__func__, ret);
+		}
+	}
+
+	list_add(&priv->node, &priv_list);
+	return 0;
+
+put_reg:
+	if (priv->reg_opp_table)
+		dev_pm_opp_put_regulators(priv->reg_opp_table);
+put_table:
+	dev_pm_opp_put_opp_table(priv->opp_table);
+free_cpumask:
+	free_cpumask_var(priv->cpus);
 	return ret;
+}
+
+static void dt_cpufreq_release(void)
+{
+	struct private_data *priv, *tmp;
+
+	list_for_each_entry_safe(priv, tmp, &priv_list, node) {
+		if (priv->reg_opp_table)
+			dev_pm_opp_put_regulators(priv->reg_opp_table);
+		dev_pm_opp_put_opp_table(priv->opp_table);
+		free_cpumask_var(priv->cpus);
+		list_del(&priv->node);
+	}
+}
+
+static int dt_cpufreq_probe(struct platform_device *pdev)
+{
+	struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev);
+	int ret, cpu;
+
+	/* Request resources early so we can return in case of -EPROBE_DEFER */
+	for_each_possible_cpu(cpu) {
+		ret = dt_cpufreq_early_init(&pdev->dev, cpu);
+		if (ret)
+			goto err;
+	}
 
 	if (data) {
 		if (data->have_governor_per_policy)
@@ -366,15 +360,21 @@ static int dt_cpufreq_probe(struct platform_device *pdev)
 	}
 
 	ret = cpufreq_register_driver(&dt_cpufreq_driver);
-	if (ret)
+	if (ret) {
 		dev_err(&pdev->dev, "failed register driver: %d\n", ret);
+		goto err;
+	}
 
+	return 0;
+err:
+	dt_cpufreq_release();
 	return ret;
 }
 
 static int dt_cpufreq_remove(struct platform_device *pdev)
 {
 	cpufreq_unregister_driver(&dt_cpufreq_driver);
+	dt_cpufreq_release();
 	return 0;
 }
 

drivers/cpufreq/imx6q-cpufreq.c

@@ -48,7 +48,6 @@ static struct clk_bulk_data clks[] = {
 };
 
 static struct device *cpu_dev;
-static bool free_opp;
 static struct cpufreq_frequency_table *freq_table;
 static unsigned int max_freq;
 static unsigned int transition_latency;
@@ -390,9 +389,6 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 		goto put_reg;
 	}
 
-	/* Because we have added the OPPs here, we must free them */
-	free_opp = true;
-
 	if (of_machine_is_compatible("fsl,imx6ul") ||
 	    of_machine_is_compatible("fsl,imx6ull")) {
 		ret = imx6ul_opp_check_speed_grading(cpu_dev);
@@ -507,7 +503,6 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 free_freq_table:
 	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
 out_free_opp:
-	if (free_opp)
 	dev_pm_opp_of_remove_table(cpu_dev);
 put_reg:
 	if (!IS_ERR(arm_reg))
@@ -528,7 +523,6 @@ static int imx6q_cpufreq_remove(struct platform_device *pdev)
 {
 	cpufreq_unregister_driver(&imx6q_cpufreq_driver);
 	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
-	if (free_opp)
 	dev_pm_opp_of_remove_table(cpu_dev);
 	regulator_put(arm_reg);
 	if (!IS_ERR(pu_reg))

drivers/cpufreq/qcom-cpufreq-hw.c

@@ -19,18 +19,23 @@
 #define LUT_L_VAL			GENMASK(7, 0)
 #define LUT_CORE_COUNT			GENMASK(18, 16)
 #define LUT_VOLT			GENMASK(11, 0)
-#define LUT_ROW_SIZE			32
 #define CLK_HW_DIV			2
 #define LUT_TURBO_IND			1
 
-/* Register offsets */
-#define REG_ENABLE			0x0
-#define REG_FREQ_LUT			0x110
-#define REG_VOLT_LUT			0x114
-#define REG_PERF_STATE			0x920
+struct qcom_cpufreq_soc_data {
+	u32 reg_enable;
+	u32 reg_freq_lut;
+	u32 reg_volt_lut;
+	u32 reg_perf_state;
+	u8 lut_row_size;
+};
+
+struct qcom_cpufreq_data {
+	void __iomem *base;
+	const struct qcom_cpufreq_soc_data *soc_data;
+};
 
 static unsigned long cpu_hw_rate, xo_rate;
-static struct platform_device *global_pdev;
 static bool icc_scaling_enabled;
 
 static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy,
@@ -77,10 +82,11 @@ static int qcom_cpufreq_update_opp(struct device *cpu_dev,
 static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
 					unsigned int index)
 {
-	void __iomem *perf_state_reg = policy->driver_data;
+	struct qcom_cpufreq_data *data = policy->driver_data;
+	const struct qcom_cpufreq_soc_data *soc_data = data->soc_data;
 	unsigned long freq = policy->freq_table[index].frequency;
 
-	writel_relaxed(index, perf_state_reg);
+	writel_relaxed(index, data->base + soc_data->reg_perf_state);
 
 	if (icc_scaling_enabled)
 		qcom_cpufreq_set_bw(policy, freq);
@@ -90,7 +96,8 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
 
 static unsigned int qcom_cpufreq_hw_get(unsigned int cpu)
 {
-	void __iomem *perf_state_reg;
+	struct qcom_cpufreq_data *data;
+	const struct qcom_cpufreq_soc_data *soc_data;
 	struct cpufreq_policy *policy;
 	unsigned int index;
 
@@ -98,9 +105,10 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu)
 	if (!policy)
 		return 0;
 
-	perf_state_reg = policy->driver_data;
+	data = policy->driver_data;
+	soc_data = data->soc_data;
 
-	index = readl_relaxed(perf_state_reg);
+	index = readl_relaxed(data->base + soc_data->reg_perf_state);
 	index = min(index, LUT_MAX_ENTRIES - 1);
 
 	return policy->freq_table[index].frequency;
@@ -109,18 +117,18 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu)
 static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
 						unsigned int target_freq)
 {
-	void __iomem *perf_state_reg = policy->driver_data;
+	struct qcom_cpufreq_data *data = policy->driver_data;
+	const struct qcom_cpufreq_soc_data *soc_data = data->soc_data;
 	unsigned int index;
 
 	index = policy->cached_resolved_idx;
-	writel_relaxed(index, perf_state_reg);
+	writel_relaxed(index, data->base + soc_data->reg_perf_state);
 
 	return policy->freq_table[index].frequency;
 }
 
 static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
-				    struct cpufreq_policy *policy,
-				    void __iomem *base)
+				    struct cpufreq_policy *policy)
 {
 	u32 data, src, lval, i, core_count, prev_freq = 0, freq;
 	u32 volt;
@@ -128,6 +136,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 	struct dev_pm_opp *opp;
 	unsigned long rate;
 	int ret;
+	struct qcom_cpufreq_data *drv_data = policy->driver_data;
+	const struct qcom_cpufreq_soc_data *soc_data = drv_data->soc_data;
 
 	table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL);
 	if (!table)
@@ -154,14 +164,14 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 	}
 
 	for (i = 0; i < LUT_MAX_ENTRIES; i++) {
-		data = readl_relaxed(base + REG_FREQ_LUT +
-				      i * LUT_ROW_SIZE);
+		data = readl_relaxed(drv_data->base + soc_data->reg_freq_lut +
+				      i * soc_data->lut_row_size);
 		src = FIELD_GET(LUT_SRC, data);
 		lval = FIELD_GET(LUT_L_VAL, data);
 		core_count = FIELD_GET(LUT_CORE_COUNT, data);
 
-		data = readl_relaxed(base + REG_VOLT_LUT +
-				      i * LUT_ROW_SIZE);
+		data = readl_relaxed(drv_data->base + soc_data->reg_volt_lut +
+				      i * soc_data->lut_row_size);
 		volt = FIELD_GET(LUT_VOLT, data) * 1000;
 
 		if (src)
@@ -170,10 +180,15 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 			freq = cpu_hw_rate / 1000;
 
 		if (freq != prev_freq && core_count != LUT_TURBO_IND) {
+			if (!qcom_cpufreq_update_opp(cpu_dev, freq, volt)) {
 				table[i].frequency = freq;
-			qcom_cpufreq_update_opp(cpu_dev, freq, volt);
 				dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
 				freq, core_count);
+			} else {
+				dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", freq);
+				table[i].frequency = CPUFREQ_ENTRY_INVALID;
+			}
+
 		} else if (core_count == LUT_TURBO_IND) {
 			table[i].frequency = CPUFREQ_ENTRY_INVALID;
 		}
@@ -190,9 +205,13 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 			 * as the boost frequency
 			 */
 			if (prev->frequency == CPUFREQ_ENTRY_INVALID) {
+				if (!qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt)) {
 					prev->frequency = prev_freq;
 					prev->flags = CPUFREQ_BOOST_FREQ;
-				qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt);
+				} else {
+					dev_warn(cpu_dev, "failed to update OPP for freq=%d\n",
+						 freq);
+				}
 			}
 
 			break;
@@ -231,14 +250,38 @@ static void qcom_get_related_cpus(int index, struct cpumask *m)
 	}
 }
 
+static const struct qcom_cpufreq_soc_data qcom_soc_data = {
+	.reg_enable = 0x0,
+	.reg_freq_lut = 0x110,
+	.reg_volt_lut = 0x114,
+	.reg_perf_state = 0x920,
+	.lut_row_size = 32,
+};
+
+static const struct qcom_cpufreq_soc_data epss_soc_data = {
+	.reg_enable = 0x0,
+	.reg_freq_lut = 0x100,
+	.reg_volt_lut = 0x200,
+	.reg_perf_state = 0x320,
+	.lut_row_size = 4,
+};
+
+static const struct of_device_id qcom_cpufreq_hw_match[] = {
+	{ .compatible = "qcom,cpufreq-hw", .data = &qcom_soc_data },
+	{ .compatible = "qcom,cpufreq-epss", .data = &epss_soc_data },
+	{}
+};
+MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match);
+
 static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 {
-	struct device *dev = &global_pdev->dev;
+	struct platform_device *pdev = cpufreq_get_driver_data();
+	struct device *dev = &pdev->dev;
 	struct of_phandle_args args;
 	struct device_node *cpu_np;
 	struct device *cpu_dev;
-	struct resource *res;
 	void __iomem *base;
+	struct qcom_cpufreq_data *data;
 	int ret, index;
 
 	cpu_dev = get_cpu_device(policy->cpu);
@@ -260,16 +303,21 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 
 	index = args.args[0];
 
-	res = platform_get_resource(global_pdev, IORESOURCE_MEM, index);
-	if (!res)
-		return -ENODEV;
+	base = devm_platform_ioremap_resource(pdev, index);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
-	base = devm_ioremap(dev, res->start, resource_size(res));
-	if (!base)
-		return -ENOMEM;
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	data->soc_data = of_device_get_match_data(&pdev->dev);
+	data->base = base;
 
 	/* HW should be in enabled state to proceed */
-	if (!(readl_relaxed(base + REG_ENABLE) & 0x1)) {
+	if (!(readl_relaxed(base + data->soc_data->reg_enable) & 0x1)) {
 		dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index);
 		ret = -ENODEV;
 		goto error;
@@ -282,9 +330,9 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 		goto error;
 	}
 
-	policy->driver_data = base + REG_PERF_STATE;
+	policy->driver_data = data;
 
-	ret = qcom_cpufreq_hw_read_lut(cpu_dev, policy, base);
+	ret = qcom_cpufreq_hw_read_lut(cpu_dev, policy);
 	if (ret) {
 		dev_err(dev, "Domain-%d failed to read LUT\n", index);
 		goto error;
@@ -308,12 +356,13 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
 {
 	struct device *cpu_dev = get_cpu_device(policy->cpu);
-	void __iomem *base = policy->driver_data - REG_PERF_STATE;
+	struct qcom_cpufreq_data *data = policy->driver_data;
+	struct platform_device *pdev = cpufreq_get_driver_data();
 
 	dev_pm_opp_remove_all_dynamic(cpu_dev);
 	dev_pm_opp_of_cpumask_remove_table(policy->related_cpus);
 	kfree(policy->freq_table);
-	devm_iounmap(&global_pdev->dev, base);
+	devm_iounmap(&pdev->dev, data->base);
 
 	return 0;
 }
@@ -358,7 +407,7 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
 	cpu_hw_rate = clk_get_rate(clk) / CLK_HW_DIV;
 	clk_put(clk);
 
-	global_pdev = pdev;
+	cpufreq_qcom_hw_driver.driver_data = pdev;
 
 	/* Check for optional interconnect paths on CPU0 */
 	cpu_dev = get_cpu_device(0);
@@ -383,12 +432,6 @@ static int qcom_cpufreq_hw_driver_remove(struct platform_device *pdev)
 	return cpufreq_unregister_driver(&cpufreq_qcom_hw_driver);
 }
 
-static const struct of_device_id qcom_cpufreq_hw_match[] = {
-	{ .compatible = "qcom,cpufreq-hw" },
-	{}
-};
-MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match);
-
 static struct platform_driver qcom_cpufreq_hw_driver = {
 	.probe = qcom_cpufreq_hw_driver_probe,
 	.remove = qcom_cpufreq_hw_driver_remove,

drivers/cpufreq/s5pv210-cpufreq.c

@@ -590,6 +590,7 @@ static struct notifier_block s5pv210_cpufreq_reboot_notifier = {
 
 static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct device_node *np;
 	int id, result = 0;
 
@@ -602,28 +603,20 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 	 * cpufreq-dt driver.
 	 */
 	arm_regulator = regulator_get(NULL, "vddarm");
-	if (IS_ERR(arm_regulator)) {
-		if (PTR_ERR(arm_regulator) == -EPROBE_DEFER)
-			pr_debug("vddarm regulator not ready, defer\n");
-		else
-			pr_err("failed to get regulator vddarm\n");
-		return PTR_ERR(arm_regulator);
-	}
+	if (IS_ERR(arm_regulator))
+		return dev_err_probe(dev, PTR_ERR(arm_regulator),
+				     "failed to get regulator vddarm\n");
 
 	int_regulator = regulator_get(NULL, "vddint");
 	if (IS_ERR(int_regulator)) {
-		if (PTR_ERR(int_regulator) == -EPROBE_DEFER)
-			pr_debug("vddint regulator not ready, defer\n");
-		else
-			pr_err("failed to get regulator vddint\n");
-		result = PTR_ERR(int_regulator);
+		result = dev_err_probe(dev, PTR_ERR(int_regulator),
+				       "failed to get regulator vddint\n");
 		goto err_int_regulator;
 	}
 
 	np = of_find_compatible_node(NULL, NULL, "samsung,s5pv210-clock");
 	if (!np) {
-		pr_err("%s: failed to find clock controller DT node\n",
-			__func__);
+		dev_err(dev, "failed to find clock controller DT node\n");
 		result = -ENODEV;
 		goto err_clock;
 	}
@@ -631,7 +624,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 	clk_base = of_iomap(np, 0);
 	of_node_put(np);
 	if (!clk_base) {
-		pr_err("%s: failed to map clock registers\n", __func__);
+		dev_err(dev, "failed to map clock registers\n");
 		result = -EFAULT;
 		goto err_clock;
 	}
@@ -639,8 +632,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 	for_each_compatible_node(np, NULL, "samsung,s5pv210-dmc") {
 		id = of_alias_get_id(np, "dmc");
 		if (id < 0 || id >= ARRAY_SIZE(dmc_base)) {
-			pr_err("%s: failed to get alias of dmc node '%pOFn'\n",
-				__func__, np);
+			dev_err(dev, "failed to get alias of dmc node '%pOFn'\n", np);
 			of_node_put(np);
 			result = id;
 			goto err_clk_base;
@@ -648,8 +640,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 
 		dmc_base[id] = of_iomap(np, 0);
 		if (!dmc_base[id]) {
-			pr_err("%s: failed to map dmc%d registers\n",
-				__func__, id);
+			dev_err(dev, "failed to map dmc%d registers\n", id);
 			of_node_put(np);
 			result = -EFAULT;
 			goto err_dmc;
@@ -658,7 +649,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
 
 	for (id = 0; id < ARRAY_SIZE(dmc_base); ++id) {
 		if (!dmc_base[id]) {
-			pr_err("%s: failed to find dmc%d node\n", __func__, id);
+			dev_err(dev, "failed to find dmc%d node\n", id);
 			result = -ENODEV;
 			goto err_dmc;
 		}

drivers/cpufreq/sti-cpufreq.c

@@ -141,7 +141,8 @@ static const struct reg_field sti_stih407_dvfs_regfields[DVFS_MAX_REGFIELDS] = {
 static const struct reg_field *sti_cpufreq_match(void)
 {
 	if (of_machine_is_compatible("st,stih407") ||
-	    of_machine_is_compatible("st,stih410"))
+	    of_machine_is_compatible("st,stih410") ||
+	    of_machine_is_compatible("st,stih418"))
 		return sti_stih407_dvfs_regfields;
 
 	return NULL;
@@ -258,7 +259,8 @@ static int sti_cpufreq_init(void)
 	int ret;
 
 	if ((!of_machine_is_compatible("st,stih407")) &&
-		(!of_machine_is_compatible("st,stih410")))
+		(!of_machine_is_compatible("st,stih410")) &&
+		(!of_machine_is_compatible("st,stih418")))
 		return -ENODEV;
 
 	ddata.cpu = get_cpu_device(0);

drivers/cpufreq/tegra186-cpufreq.c

@@ -14,6 +14,7 @@
 
 #define EDVD_CORE_VOLT_FREQ(core)		(0x20 + (core) * 0x4)
 #define EDVD_CORE_VOLT_FREQ_F_SHIFT		0
+#define EDVD_CORE_VOLT_FREQ_F_MASK		0xffff
 #define EDVD_CORE_VOLT_FREQ_V_SHIFT		16
 
 struct tegra186_cpufreq_cluster_info {
@@ -91,10 +92,39 @@ static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
 	return 0;
 }
 
+static unsigned int tegra186_cpufreq_get(unsigned int cpu)
+{
+	struct cpufreq_frequency_table *tbl;
+	struct cpufreq_policy *policy;
+	void __iomem *edvd_reg;
+	unsigned int i, freq = 0;
+	u32 ndiv;
+
+	policy = cpufreq_cpu_get(cpu);
+	if (!policy)
+		return 0;
+
+	tbl = policy->freq_table;
+	edvd_reg = policy->driver_data;
+	ndiv = readl(edvd_reg) & EDVD_CORE_VOLT_FREQ_F_MASK;
+
+	for (i = 0; tbl[i].frequency != CPUFREQ_TABLE_END; i++) {
+		if ((tbl[i].driver_data & EDVD_CORE_VOLT_FREQ_F_MASK) == ndiv) {
+			freq = tbl[i].frequency;
+			break;
+		}
+	}
+
+	cpufreq_cpu_put(policy);
+
+	return freq;
+}
+
 static struct cpufreq_driver tegra186_cpufreq_driver = {
 	.name = "tegra186",
 	.flags = CPUFREQ_STICKY | CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
 			CPUFREQ_NEED_INITIAL_FREQ_CHECK,
+	.get = tegra186_cpufreq_get,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = tegra186_cpufreq_set_target,
 	.init = tegra186_cpufreq_init,

drivers/opp/core.c

@@ -1068,7 +1068,7 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 	 */
 	opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL);
 	if (!opp_table)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	mutex_init(&opp_table->lock);
 	mutex_init(&opp_table->genpd_virt_dev_lock);
@@ -1079,8 +1079,8 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 
 	opp_dev = _add_opp_dev(dev, opp_table);
 	if (!opp_dev) {
-		kfree(opp_table);
-		return NULL;
+		ret = -ENOMEM;
+		goto err;
 	}
 
 	_of_init_opp_table(opp_table, dev, index);
@@ -1089,16 +1089,21 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 	opp_table->clk = clk_get(dev, NULL);
 	if (IS_ERR(opp_table->clk)) {
 		ret = PTR_ERR(opp_table->clk);
-		if (ret != -EPROBE_DEFER)
-			dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__,
-				ret);
+		if (ret == -EPROBE_DEFER)
+			goto err;
+
+		dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
 	}
 
 	/* Find interconnect path(s) for the device */
 	ret = dev_pm_opp_of_find_icc_paths(dev, opp_table);
-	if (ret)
+	if (ret) {
+		if (ret == -EPROBE_DEFER)
+			goto err;
+
 		dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
 			 __func__, ret);
+	}
 
 	BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
 	INIT_LIST_HEAD(&opp_table->opp_list);
@@ -1107,6 +1112,10 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 	/* Secure the device table modification */
 	list_add(&opp_table->node, &opp_tables);
 	return opp_table;
+
+err:
+	kfree(opp_table);
+	return ERR_PTR(ret);
 }
 
 void _get_opp_table_kref(struct opp_table *opp_table)
@@ -1129,7 +1138,7 @@ static struct opp_table *_opp_get_opp_table(struct device *dev, int index)
 	if (opp_table) {
 		if (!_add_opp_dev_unlocked(dev, opp_table)) {
 			dev_pm_opp_put_opp_table(opp_table);
-			opp_table = NULL;
+			opp_table = ERR_PTR(-ENOMEM);
 		}
 		goto unlock;
 	}
@@ -1581,8 +1590,8 @@ struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
 	struct opp_table *opp_table;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(opp_table))
+		return opp_table;
 
 	/* Make sure there are no concurrent readers while updating opp_table */
 	WARN_ON(!list_empty(&opp_table->opp_list));
@@ -1640,8 +1649,8 @@ struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
 	struct opp_table *opp_table;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(opp_table))
+		return opp_table;
 
 	/* Make sure there are no concurrent readers while updating opp_table */
 	WARN_ON(!list_empty(&opp_table->opp_list));
@@ -1733,8 +1742,8 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
 	int ret, i;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(opp_table))
+		return opp_table;
 
 	/* This should be called before OPPs are initialized */
 	if (WARN_ON(!list_empty(&opp_table->opp_list))) {
@@ -1843,8 +1852,8 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
 	int ret;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(opp_table))
+		return opp_table;
 
 	/* This should be called before OPPs are initialized */
 	if (WARN_ON(!list_empty(&opp_table->opp_list))) {
@@ -1911,8 +1920,8 @@ struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
 		return ERR_PTR(-EINVAL);
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (!IS_ERR(opp_table))
+		return opp_table;
 
 	/* This should be called before OPPs are initialized */
 	if (WARN_ON(!list_empty(&opp_table->opp_list))) {
@@ -1992,8 +2001,8 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
 	const char **name = names;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return ERR_PTR(-ENOMEM);
+	if (IS_ERR(opp_table))
+		return opp_table;
 
 	/*
 	 * If the genpd's OPP table isn't already initialized, parsing of the
@@ -2163,8 +2172,8 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 	int ret;
 
 	opp_table = dev_pm_opp_get_opp_table(dev);
-	if (!opp_table)
-		return -ENOMEM;
+	if (IS_ERR(opp_table))
+		return PTR_ERR(opp_table);
 
 	/* Fix regulator count for dynamic OPPs */
 	opp_table->regulator_count = 1;

drivers/opp/of.c

@@ -886,11 +886,25 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
 	const __be32 *val;
 	int nr, ret = 0;
 
+	mutex_lock(&opp_table->lock);
+	if (opp_table->parsed_static_opps) {
+		opp_table->parsed_static_opps++;
+		mutex_unlock(&opp_table->lock);
+		return 0;
+	}
+
+	opp_table->parsed_static_opps = 1;
+	mutex_unlock(&opp_table->lock);
+
 	prop = of_find_property(dev->of_node, "operating-points", NULL);
-	if (!prop)
-		return -ENODEV;
-	if (!prop->value)
-		return -ENODATA;
+	if (!prop) {
+		ret = -ENODEV;
+		goto remove_static_opp;
+	}
+	if (!prop->value) {
+		ret = -ENODATA;
+		goto remove_static_opp;
+	}
 
 	/*
 	 * Each OPP is a set of tuples consisting of frequency and
@@ -899,13 +913,10 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
 	nr = prop->length / sizeof(u32);
 	if (nr % 2) {
 		dev_err(dev, "%s: Invalid OPP table\n", __func__);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto remove_static_opp;
 	}
 
-	mutex_lock(&opp_table->lock);
-	opp_table->parsed_static_opps = 1;
-	mutex_unlock(&opp_table->lock);
-
 	val = prop->value;
 	while (nr) {
 		unsigned long freq = be32_to_cpup(val++) * 1000;
@@ -915,12 +926,14 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
 		if (ret) {
 			dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
 				__func__, freq, ret);
-			_opp_remove_all_static(opp_table);
-			return ret;
+			goto remove_static_opp;
 		}
 		nr -= 2;
 	}
 
+remove_static_opp:
+	_opp_remove_all_static(opp_table);
+
 	return ret;
 }
 
@@ -947,8 +960,8 @@ int dev_pm_opp_of_add_table(struct device *dev)
 	int ret;
 
 	opp_table = dev_pm_opp_get_opp_table_indexed(dev, 0);
-	if (!opp_table)
-		return -ENOMEM;
+	if (IS_ERR(opp_table))
+		return PTR_ERR(opp_table);
 
 	/*
 	 * OPPs have two version of bindings now. Also try the old (v1)
@@ -1002,8 +1015,8 @@ int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
 	}
 
 	opp_table = dev_pm_opp_get_opp_table_indexed(dev, index);
-	if (!opp_table)
-		return -ENOMEM;
+	if (IS_ERR(opp_table))
+		return PTR_ERR(opp_table);
 
 	ret = _of_add_opp_table_v2(dev, opp_table);
 	if (ret)

drivers/soc/samsung/exynos-asv.c

@@ -93,7 +93,7 @@ static int exynos_asv_update_opps(struct exynos_asv *asv)
 			continue;
 
 		opp_table = dev_pm_opp_get_opp_table(cpu);
-		if (IS_ERR_OR_NULL(opp_table))
+		if (IS_ERR(opp_table))
 			continue;
 
 		if (!last_opp_table || opp_table != last_opp_table) {