ipq806x: introduce dedicated krait cpufreq

- Drop cpufreq patchs that tweak the cpufreq-dt driver
- Add dedicated krait cpufreq driver

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

10 files changed, 995 insertions, 609 deletions

diff --git a/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch b/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch
deleted file mode 100644
index 9efbd583b4..0000000000
--- a/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch
+++ /dev/null
@@ -1,153 +0,0 @@
-From: Sylwester Nawrocki <s.nawrocki@samsung.com>
-To: krzk@kernel.org, vireshk@kernel.org, robh+dt@kernel.org
-Cc: sboyd@kernel.org, roger.lu@mediatek.com,
-	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
-	linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org,
-	b.zolnierkie@samsung.com, m.szyprowski@samsung.com,
-	Stephen Boyd <sboyd@codeaurora.org>,
-	Sylwester Nawrocki <s.nawrocki@samsung.com>
-Subject: [PATCH v5 1/4] PM / OPP: Support adjusting OPP voltages at runtime
-Date: Wed, 16 Oct 2019 16:57:53 +0200
-Message-ID: <20191016145756.16004-2-s.nawrocki@samsung.com> (raw)
-In-Reply-To: <20191016145756.16004-1-s.nawrocki@samsung.com>
-
-From: Stephen Boyd <sboyd@codeaurora.org>
-
-On some SoCs the Adaptive Voltage Scaling (AVS) technique is
-employed to optimize the operating voltage of a device. At a
-given frequency, the hardware monitors dynamic factors and either
-makes a suggestion for how much to adjust a voltage for the
-current frequency, or it automatically adjusts the voltage
-without software intervention. Add an API to the OPP library for
-the former case, so that AVS type devices can update the voltages
-for an OPP when the hardware determines the voltage should
-change. The assumption is that drivers like CPUfreq or devfreq
-will register for the OPP notifiers and adjust the voltage
-according to suggestions that AVS makes.
-
-This patch is derived from [1] submitted by Stephen.
-[1] https://lore.kernel.org/patchwork/patch/599279/
-
-Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
-Signed-off-by: Roger Lu <roger.lu@mediatek.com>
-[s.nawrocki@samsung.com: added handling of OPP min/max voltage]
-Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
----
- drivers/opp/core.c     | 69 ++++++++++++++++++++++++++++++++++++++++++
- include/linux/pm_opp.h | 13 ++++++++
- 2 files changed, 82 insertions(+)
-
---- a/drivers/opp/core.c
-+++ b/drivers/opp/core.c
-@@ -2102,6 +2102,75 @@ put_table:
- }
- 
- /**
-+ * dev_pm_opp_adjust_voltage() - helper to change the voltage of an OPP
-+ * @dev:		device for which we do this operation
-+ * @freq:		OPP frequency to adjust voltage of
-+ * @u_volt:		new OPP target voltage
-+ * @u_volt_min:		new OPP min voltage
-+ * @u_volt_max:		new OPP max voltage
-+ *
-+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
-+ * copy operation, returns 0 if no modifcation was done OR modification was
-+ * successful.
-+ */
-+int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
-+			      unsigned long u_volt, unsigned long u_volt_min,
-+			      unsigned long u_volt_max)
-+
-+{
-+	struct opp_table *opp_table;
-+	struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
-+	int r = 0;
-+
-+	/* Find the opp_table */
-+	opp_table = _find_opp_table(dev);
-+	if (IS_ERR(opp_table)) {
-+		r = PTR_ERR(opp_table);
-+		dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
-+		return r;
-+	}
-+
-+	mutex_lock(&opp_table->lock);
-+
-+	/* Do we have the frequency? */
-+	list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
-+		if (tmp_opp->rate == freq) {
-+			opp = tmp_opp;
-+			break;
-+		}
-+	}
-+
-+	if (IS_ERR(opp)) {
-+		r = PTR_ERR(opp);
-+		goto adjust_unlock;
-+	}
-+
-+	/* Is update really needed? */
-+	if (opp->supplies->u_volt == u_volt)
-+		goto adjust_unlock;
-+
-+	opp->supplies->u_volt = u_volt;
-+	opp->supplies->u_volt_min = u_volt_min;
-+	opp->supplies->u_volt_max = u_volt_max;
-+
-+	dev_pm_opp_get(opp);
-+	mutex_unlock(&opp_table->lock);
-+
-+	/* Notify the voltage change of the OPP */
-+	blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE,
-+				     opp);
-+
-+	dev_pm_opp_put(opp);
-+	goto adjust_put_table;
-+
-+adjust_unlock:
-+	mutex_unlock(&opp_table->lock);
-+adjust_put_table:
-+	dev_pm_opp_put_opp_table(opp_table);
-+	return r;
-+}
-+
-+/**
-  * dev_pm_opp_enable() - Enable a specific OPP
-  * @dev:	device for which we do this operation
-  * @freq:	OPP frequency to enable
---- a/include/linux/pm_opp.h
-+++ b/include/linux/pm_opp.h
-@@ -22,6 +22,7 @@ struct opp_table;
- 
- enum dev_pm_opp_event {
- 	OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
-+	OPP_EVENT_ADJUST_VOLTAGE,
- };
- 
- /**
-@@ -113,6 +114,10 @@ int dev_pm_opp_add(struct device *dev, u
- void dev_pm_opp_remove(struct device *dev, unsigned long freq);
- void dev_pm_opp_remove_all_dynamic(struct device *dev);
- 
-+int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
-+			      unsigned long u_volt, unsigned long u_volt_min,
-+			      unsigned long u_volt_max);
-+
- int dev_pm_opp_enable(struct device *dev, unsigned long freq);
- 
- int dev_pm_opp_disable(struct device *dev, unsigned long freq);
-@@ -242,6 +247,14 @@ static inline void dev_pm_opp_remove_all
- {
- }
- 
-+static inline int
-+dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
-+			  unsigned long u_volt, unsigned long u_volt_min,
-+			  unsigned long u_volt_max)
-+{
-+	return 0;
-+}
-+
- static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
- {
- 	return 0;
diff --git a/target/linux/ipq806x/patches-5.10/0051-PM-OPP-Add-a-helper-to-get-an-opp-regulator-for-devi.patch b/target/linux/ipq806x/patches-5.10/0051-PM-OPP-Add-a-helper-to-get-an-opp-regulator-for-devi.patch
deleted file mode 100644
index 35fe45fca7..0000000000
--- a/target/linux/ipq806x/patches-5.10/0051-PM-OPP-Add-a-helper-to-get-an-opp-regulator-for-devi.patch
+++ /dev/null
@@ -1,52 +0,0 @@
-From d06ca5e7a3cf726f5be5ffd96e93ccd798b8c09a Mon Sep 17 00:00:00 2001
-From: Georgi Djakov <georgi.djakov@linaro.org>
-Date: Thu, 12 May 2016 14:41:33 +0300
-Subject: [PATCH 51/69] PM / OPP: Add a helper to get an opp regulator for
- device
-
-Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
----
- drivers/opp/core.c            | 21 +++++++++++++++++++++
- include/linux/pm_opp.h        |  1 +
- 2 files changed, 22 insertions(+)
-
---- a/drivers/opp/core.c
-+++ b/drivers/opp/core.c
-@@ -127,6 +127,27 @@ unsigned long dev_pm_opp_get_freq(struct
- }
- EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
- 
-+struct regulator *dev_pm_opp_get_regulator(struct device *dev)
-+{
-+	struct opp_table *opp_table;
-+	struct regulator *reg;
-+
-+	rcu_read_lock();
-+
-+	opp_table = _find_opp_table(dev);
-+	if (IS_ERR(opp_table)) {
-+		rcu_read_unlock();
-+		return ERR_CAST(opp_table);
-+	}
-+
-+	reg = opp_table->regulators[0];
-+
-+	rcu_read_unlock();
-+
-+	return reg;
-+}
-+EXPORT_SYMBOL_GPL(dev_pm_opp_get_regulator);
-+
- /**
-  * dev_pm_opp_get_level() - Gets the level corresponding to an available opp
-  * @opp:	opp for which level value has to be returned for
---- a/include/linux/pm_opp.h
-+++ b/include/linux/pm_opp.h
-@@ -83,6 +83,7 @@ void dev_pm_opp_put_opp_table(struct opp
- unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
- 
- unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
-+struct regulator *dev_pm_opp_get_regulator(struct device *dev);
- 
- unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
- 
diff --git a/target/linux/ipq806x/patches-5.10/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch b/target/linux/ipq806x/patches-5.10/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch
deleted file mode 100644
index 8498a0b6df..0000000000
--- a/target/linux/ipq806x/patches-5.10/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch
+++ /dev/null
@@ -1,47 +0,0 @@
-From 4533c285c2aedce6d4434d7b877066de3b1ecb33 Mon Sep 17 00:00:00 2001
-From: Georgi Djakov <georgi.djakov@linaro.org>
-Date: Thu, 25 Aug 2016 18:43:35 +0300
-Subject: [PATCH 52/69] PM / OPP: Update the voltage tolerance when adjusting
- the OPP
-
-When the voltage is adjusted, the voltage tolerance is not updated.
-This can lead to situations where the voltage min value is greater
-than the voltage max value. The final result is triggering a BUG()
-in the regulator core.
-Fix this by updating the voltage tolerance values too.
-
-Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
----
- drivers/opp/core.c | 5 +++++
- 1 file changed, 5 insertions(+)
-
---- a/drivers/opp/core.c
-+++ b/drivers/opp/core.c
-@@ -2142,6 +2142,7 @@ int dev_pm_opp_adjust_voltage(struct dev
- 	struct opp_table *opp_table;
- 	struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
- 	int r = 0;
-+	unsigned long tol;
- 
- 	/* Find the opp_table */
- 	opp_table = _find_opp_table(dev);
-@@ -2171,8 +2172,17 @@ int dev_pm_opp_adjust_voltage(struct dev
- 		goto adjust_unlock;
- 
- 	opp->supplies->u_volt = u_volt;
--	opp->supplies->u_volt_min = u_volt_min;
--	opp->supplies->u_volt_max = u_volt_max;
-+
-+	tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
-+	if ( u_volt_min == u_volt )
-+		opp->supplies->u_volt_min = u_volt - tol;
-+	else
-+		opp->supplies->u_volt_min = u_volt_min;
-+
-+	if ( u_volt_max == u_volt )
-+		opp->supplies->u_volt_max = u_volt + tol;
-+	else
-+		opp->supplies->u_volt_max = u_volt_max;
- 
- 	dev_pm_opp_get(opp);
- 	mutex_unlock(&opp_table->lock);
diff --git a/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch b/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch
deleted file mode 100644
index 2e9c101d94..0000000000
--- a/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch
+++ /dev/null
@@ -1,118 +0,0 @@
-From 10577f74c35bd395951d1b2382c8d821089b5745 Mon Sep 17 00:00:00 2001
-From: Stephen Boyd <sboyd@codeaurora.org>
-Date: Fri, 18 Sep 2015 17:52:08 -0700
-Subject: [PATCH 54/69] cpufreq-dt: Handle OPP voltage adjust events
-
-On some SoCs the Adaptive Voltage Scaling (AVS) technique is
-employed to optimize the operating voltage of a device. At a
-given frequency, the hardware monitors dynamic factors and either
-makes a suggestion for how much to adjust a voltage for the
-current frequency, or it automatically adjusts the voltage
-without software intervention.
-
-In the former case, an AVS driver will call
-dev_pm_opp_modify_voltage() and update the voltage for the
-particular OPP the CPUs are using. Add an OPP notifier to
-cpufreq-dt so that we can adjust the voltage of the CPU when AVS
-updates the OPP.
-
-Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
-Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
-Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
----
- drivers/cpufreq/cpufreq-dt.c | 68 ++++++++++++++++++++++++++++++++++++++++++--
- 1 file changed, 65 insertions(+), 3 deletions(-)
-
---- a/drivers/cpufreq/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -27,6 +27,9 @@ struct private_data {
- 	struct opp_table *opp_table;
- 	struct device *cpu_dev;
- 	const char *reg_name;
-+	struct notifier_block opp_nb;
-+	struct mutex lock;
-+	unsigned long opp_freq;
- 	bool have_static_opps;
- };
- 
-@@ -42,12 +45,15 @@ static int set_target(struct cpufreq_pol
- 	unsigned long freq = policy->freq_table[index].frequency;
- 	int ret;
- 
-+	mutex_lock(&priv->lock);
- 	ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
- 
- 	if (!ret) {
-+		priv->opp_freq = freq * 1000;
- 		arch_set_freq_scale(policy->related_cpus, freq,
- 				    policy->cpuinfo.max_freq);
- 	}
-+	mutex_unlock(&priv->lock);
- 
- 	return ret;
- }
-@@ -90,6 +96,39 @@ node_put:
- 	return name;
- }
- 
-+static int opp_notifier(struct notifier_block *nb, unsigned long event,
-+			void *data)
-+{
-+	struct dev_pm_opp *opp = data;
-+	struct private_data *priv = container_of(nb, struct private_data,
-+						 opp_nb);
-+	struct device *cpu_dev = priv->cpu_dev;
-+	struct regulator *cpu_reg;
-+	unsigned long volt, freq;
-+	int ret = 0;
-+
-+	if (event == OPP_EVENT_ADJUST_VOLTAGE) {
-+		cpu_reg = dev_pm_opp_get_regulator(cpu_dev);
-+		if (IS_ERR(cpu_reg)) {
-+			ret = PTR_ERR(cpu_reg);
-+			goto out;
-+		}
-+		volt = dev_pm_opp_get_voltage(opp);
-+		freq = dev_pm_opp_get_freq(opp);
-+
-+		mutex_lock(&priv->lock);
-+		if (freq == priv->opp_freq) {
-+			ret = regulator_set_voltage_triplet(cpu_reg, volt, volt, volt);
-+		}
-+		mutex_unlock(&priv->lock);
-+		if (ret)
-+			dev_err(cpu_dev, "failed to scale voltage: %d\n", ret);
-+	}
-+
-+out:
-+	return notifier_from_errno(ret);
-+}
-+
- static int resources_available(void)
- {
- 	struct device *cpu_dev;
-@@ -246,10 +285,14 @@ static int cpufreq_init(struct cpufreq_p
- 				__func__, ret);
- 	}
- 
-+	mutex_init(&priv->lock);
-+	priv->opp_nb.notifier_call = opp_notifier;
-+	dev_pm_opp_register_notifier(cpu_dev, &priv->opp_nb);
-+
- 	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;
-+		goto out_unregister_nb;
- 	}
- 
- 	priv->cpu_dev = cpu_dev;
-@@ -281,6 +324,8 @@ static int cpufreq_init(struct cpufreq_p
- 
- out_free_cpufreq_table:
- 	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
-+out_unregister_nb:
-+	dev_pm_opp_unregister_notifier(cpu_dev, &priv->opp_nb);
- out_free_opp:
- 	if (priv->have_static_opps)
- 		dev_pm_opp_of_cpumask_remove_table(policy->cpus);
diff --git a/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch b/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
deleted file mode 100644
index 910c2b1722..0000000000
--- a/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
+++ /dev/null
@@ -1,199 +0,0 @@
---- a/drivers/cpufreq/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -39,20 +39,85 @@ static struct freq_attr *cpufreq_dt_attr
- 	NULL,
- };
- 
-+struct shared_data {
-+	unsigned long *curr_freq_table;
-+	unsigned long curr_l2_freq;
-+	unsigned long curr_l2_volt;
-+};
-+
-+static struct shared_data *cpus_shared_data;
-+
- static int set_target(struct cpufreq_policy *policy, unsigned int index)
- {
- 	struct private_data *priv = policy->driver_data;
- 	unsigned long freq = policy->freq_table[index].frequency;
-+	struct clk *l2_clk = policy->l2_clk;
-+	struct regulator *l2_regulator = policy->l2_regulator;
-+	unsigned long l2_freq, target_l2_freq;
-+	unsigned long l2_vol, target_l2_volt;
-+	unsigned long target_freq;
- 	int ret;
- 
- 	mutex_lock(&priv->lock);
- 	ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
- 
- 	if (!ret) {
-+		if (policy->l2_rate_set) {
-+			int cpu, l2_index, tol = 0;
-+			target_freq = freq * 1000;
-+
-+			cpus_shared_data->curr_freq_table[policy->cpu] = target_freq;
-+			for_each_present_cpu(cpu)
-+				if (cpu != policy->cpu)
-+					target_freq = max(target_freq, cpus_shared_data->curr_freq_table[cpu]);
-+
-+			for (l2_index = 2; l2_index > 0; l2_index--)
-+				if (target_freq >= policy->l2_cpufreq[l2_index])
-+					break;
-+
-+			l2_freq = cpus_shared_data->curr_l2_freq;
-+			target_l2_freq = policy->l2_rate[l2_index];
-+
-+			if (l2_freq != target_l2_freq) {
-+
-+				/*
-+				 * Set to idle bin if switching from normal to high bin 
-+				 * or vice versa
-+				 */
-+				if ( (l2_index == 2 && l2_freq == policy->l2_rate[1]) ||
-+					 (l2_index == 1 && l2_freq == policy->l2_rate[2]) ) {
-+					ret = clk_set_rate(l2_clk, policy->l2_rate[0]);
-+					if (ret)
-+						goto exit;
-+				}
-+
-+				/* scale l2 with the core */
-+				ret = clk_set_rate(l2_clk, target_l2_freq);
-+				if (ret)
-+					goto exit;
-+				cpus_shared_data->curr_l2_freq = target_l2_freq;
-+
-+				if (policy->l2_volt_set) {
-+
-+					l2_vol = cpus_shared_data->curr_l2_volt;
-+					target_l2_volt = policy->l2_volt[l2_index];
-+
-+					if (l2_vol != target_l2_volt) {
-+						tol = target_l2_volt * policy->l2_volt_tol / 100;
-+						ret = regulator_set_voltage_tol(l2_regulator,target_l2_volt,tol);
-+						if (ret)
-+							goto exit;
-+						cpus_shared_data->curr_l2_volt = target_l2_volt;
-+					}
-+				}
-+			}
-+		}
- 		priv->opp_freq = freq * 1000;
- 		arch_set_freq_scale(policy->related_cpus, freq,
- 				    policy->cpuinfo.max_freq);
- 	}
-+
-+exit:
- 	mutex_unlock(&priv->lock);
- 
- 	return ret;
-@@ -195,6 +260,9 @@ static int cpufreq_init(struct cpufreq_p
- 	bool fallback = false;
- 	const char *name;
- 	int ret;
-+	struct device_node *np, *l2_np;
-+	struct clk *l2_clk = NULL;
-+	struct regulator *l2_regulator = NULL;
- 
- 	cpu_dev = get_cpu_device(policy->cpu);
- 	if (!cpu_dev) {
-@@ -302,6 +370,57 @@ static int cpufreq_init(struct cpufreq_p
- 
- 	policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
- 
-+	policy->l2_rate_set = false;
-+	policy->l2_volt_set = false;
-+
-+	l2_clk = clk_get(cpu_dev, "l2");
-+	if (!IS_ERR(l2_clk))
-+		policy->l2_clk = l2_clk;
-+
-+	l2_np = of_find_node_by_name(NULL, "qcom,l2");
-+	if (l2_np) {
-+		struct device_node *vdd;
-+		np = of_node_get(priv->cpu_dev->of_node);
-+
-+		if (np)
-+			of_property_read_u32(np, "voltage-tolerance", &policy->l2_volt_tol);
-+
-+		of_property_read_u32_array(l2_np, "qcom,l2-rates", policy->l2_rate, 3);
-+		if (policy->l2_rate[0] && policy->l2_rate[1] && policy->l2_rate[2]) {
-+			policy->l2_rate_set = true;
-+			of_property_read_u32_array(l2_np, "qcom,l2-cpufreq", policy->l2_cpufreq, 3);
-+			of_property_read_u32_array(l2_np, "qcom,l2-volt", policy->l2_volt, 3);
-+		} else
-+			pr_warn("L2: failed to parse L2 rates\n");
-+
-+		if (!policy->l2_cpufreq[0] && !policy->l2_cpufreq[1] && 
-+			!policy->l2_cpufreq[2] && policy->l2_rate_set) {
-+			int i;
-+
-+			pr_warn("L2: failed to parse target cpu freq, using defaults\n");
-+			for (i = 0; i < 3; i++)
-+				policy->l2_cpufreq[i] = policy->l2_rate[i];
-+		}
-+
-+		if (policy->l2_volt[0] && policy->l2_volt[1] && policy->l2_volt[2] &&
-+			policy->l2_volt_tol && policy->l2_rate_set) {
-+			vdd = of_parse_phandle(l2_np, "qcom,l2-supply", 0);
-+
-+			if (vdd) {
-+				l2_regulator = devm_regulator_get(cpu_dev, vdd->name);
-+				if (!IS_ERR(l2_regulator)) {
-+					policy->l2_regulator = l2_regulator;
-+					policy->l2_volt_set = true;
-+				} else {
-+					pr_warn("failed to get l2 supply\n");
-+					l2_regulator = NULL;
-+				}
-+
-+				of_node_put(vdd);
-+			}
-+		}
-+	}
-+
- 	/* Support turbo/boost mode */
- 	if (policy_has_boost_freq(policy)) {
- 		/* This gets disabled by core on driver unregister */
-@@ -401,6 +520,14 @@ static int dt_cpufreq_probe(struct platf
- 	if (ret)
- 		return ret;
- 
-+	cpus_shared_data = kzalloc(sizeof(struct shared_data), GFP_KERNEL);
-+	if (!cpus_shared_data)
-+		return -ENOMEM;
-+
-+	cpus_shared_data->curr_freq_table = kzalloc(sizeof(int) * CONFIG_NR_CPUS, GFP_KERNEL);
-+	if (!cpus_shared_data->curr_freq_table)
-+		return -ENOMEM;
-+
- 	if (data) {
- 		if (data->have_governor_per_policy)
- 			dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY;
-@@ -419,6 +546,8 @@ static int dt_cpufreq_probe(struct platf
- 
- static int dt_cpufreq_remove(struct platform_device *pdev)
- {
-+	kfree(cpus_shared_data->curr_freq_table);
-+	kfree(cpus_shared_data);
- 	cpufreq_unregister_driver(&dt_cpufreq_driver);
- 	return 0;
- }
---- a/include/linux/cpufreq.h
-+++ b/include/linux/cpufreq.h
-@@ -58,7 +58,15 @@ struct cpufreq_policy {
- 						should set cpufreq */
- 	unsigned int		cpu;    /* cpu managing this policy, must be online */
- 
--	struct clk		*clk;
-+	struct clk			*clk;
-+	struct clk			*l2_clk; /* L2 clock */
-+	struct regulator	*l2_regulator; /* L2 supply */
-+	unsigned int		l2_rate[3]; /* L2 bus clock rate */
-+	bool				l2_rate_set;
-+	unsigned int		l2_cpufreq[3]; /* L2 target CPU frequency */
-+	unsigned int		l2_volt[3]; /* L2 voltage array */
-+	bool				l2_volt_set;
-+	unsigned int		l2_volt_tol; /* L2 voltage tolerance */
- 	struct cpufreq_cpuinfo	cpuinfo;/* see above */
- 
- 	unsigned int		min;    /* in kHz */
diff --git a/target/linux/ipq806x/patches-5.10/0056-cpufreq-dt-Add-missing-rcu-locks.patch b/target/linux/ipq806x/patches-5.10/0056-cpufreq-dt-Add-missing-rcu-locks.patch
deleted file mode 100644
index 9b85839e19..0000000000
--- a/target/linux/ipq806x/patches-5.10/0056-cpufreq-dt-Add-missing-rcu-locks.patch
+++ /dev/null
@@ -1,23 +0,0 @@
-From 001a8dcb56ced58c518aaa10a4f0ba5e878705b6 Mon Sep 17 00:00:00 2001
-From: Georgi Djakov <georgi.djakov@linaro.org>
-Date: Tue, 17 May 2016 16:15:43 +0300
-Subject: [PATCH 56/69] cpufreq-dt: Add missing rcu locks
-
-Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
----
- drivers/cpufreq/cpufreq-dt.c | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/drivers/cpufreq/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -178,8 +178,10 @@ static int opp_notifier(struct notifier_
- 			ret = PTR_ERR(cpu_reg);
- 			goto out;
- 		}
-+		rcu_read_lock();
- 		volt = dev_pm_opp_get_voltage(opp);
- 		freq = dev_pm_opp_get_freq(opp);
-+		rcu_read_unlock();
- 
- 		mutex_lock(&priv->lock);
- 		if (freq == priv->opp_freq) {
diff --git a/target/linux/ipq806x/patches-5.10/093-drivers-cpufreq-qcom-cpufreq-nvmem-support-specific-.patch b/target/linux/ipq806x/patches-5.10/093-drivers-cpufreq-qcom-cpufreq-nvmem-support-specific-.patch
new file mode 100644
index 0000000000..afc9287118
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.10/093-drivers-cpufreq-qcom-cpufreq-nvmem-support-specific-.patch
@@ -0,0 +1,56 @@
+From a206d4061f1cc2c5cd17ee45c53a0ba711e48e6d Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Sun, 7 Feb 2021 16:42:52 +0100
+Subject: [PATCH 3/3] drivers: cpufreq: qcom-cpufreq-nvmem: support specific
+ cpufreq driver
+
+Add support for specific cpufreq driver for qcom-cpufreq-nvmem driver.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+---
+ drivers/cpufreq/qcom-cpufreq-nvmem.c | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
+index d1744b5d9619..4866c74ead0f 100644
+--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
++++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
+@@ -52,6 +52,7 @@ struct qcom_cpufreq_match_data {
+ 			   char **pvs_name,
+ 			   struct qcom_cpufreq_drv *drv);
+ 	const char **genpd_names;
++	const char *cpufreq_driver;
+ };
+ 
+ struct qcom_cpufreq_drv {
+@@ -250,6 +251,7 @@ static const struct qcom_cpufreq_match_data match_data_kryo = {
+ 
+ static const struct qcom_cpufreq_match_data match_data_krait = {
+ 	.get_version = qcom_cpufreq_krait_name_version,
++	.cpufreq_driver = "krait-cpufreq",
+ };
+ 
+ static const char *qcs404_genpd_names[] = { "cpr", NULL };
+@@ -385,6 +387,19 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
+ 		}
+ 	}
+ 
++	if (drv->data->cpufreq_driver) {
++		cpufreq_dt_pdev = platform_device_register_simple(
++			drv->data->cpufreq_driver, -1, NULL, 0);
++		if (!IS_ERR(cpufreq_dt_pdev)) {
++			platform_set_drvdata(pdev, drv);
++			return 0;
++		} else {
++			dev_err(cpu_dev,
++				"Failed to register dedicated %s cpufreq\n",
++				drv->data->cpufreq_driver);
++		}
++	}
++
+ 	cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
+ 							  NULL, 0);
+ 	if (!IS_ERR(cpufreq_dt_pdev)) {
+-- 
+2.29.2
+
diff --git a/target/linux/ipq806x/patches-5.10/098-1-cpufreq-add-Krait-dedicated-scaling-driver.patch b/target/linux/ipq806x/patches-5.10/098-1-cpufreq-add-Krait-dedicated-scaling-driver.patch
new file mode 100644
index 0000000000..42913a994c
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.10/098-1-cpufreq-add-Krait-dedicated-scaling-driver.patch
@@ -0,0 +1,679 @@
+From cc41a266280cad0b55319e614167c88dff344248 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Sat, 22 Feb 2020 16:33:10 +0100
+Subject: [PATCH 1/8] cpufreq: add Krait dedicated scaling driver
+
+This new driver is based on generic cpufreq-dt driver.
+Krait SoCs have 2-4 cpu and one shared L2 cache that can
+operate at different frequency based on the maximum cpu clk
+across all core.
+L2 frequency and voltage are scaled on every frequency change
+if needed. On Krait SoCs is present a bug that can cause
+transition problem between frequency bin, to workaround this
+on more than one transition, the L2 frequency is first set to the
+base rate and then to the target rate.
+The L2 frequency use the OPP framework and use the opp-level
+bindings to link the l2 freq to different cpu freq. This is needed
+as the Krait l2 clk are note mapped 1:1 to the core clks and some
+of the l2 clk is set based on a range of the cpu clks. If the driver
+find a broken config (for example no opp-level set) the l2 scaling is
+skipped.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+---
+ drivers/cpufreq/Kconfig.arm          |  14 +-
+ drivers/cpufreq/Makefile             |   2 +
+ drivers/cpufreq/qcom-cpufreq-krait.c | 589 +++++++++++++++++++++++++++
+ 3 files changed, 604 insertions(+), 1 deletion(-)
+ create mode 100644 drivers/cpufreq/qcom-cpufreq-krait.c
+
+--- a/drivers/cpufreq/Kconfig.arm
++++ b/drivers/cpufreq/Kconfig.arm
+@@ -150,6 +150,18 @@ config ARM_QCOM_CPUFREQ_HW
+ 	  The driver implements the cpufreq interface for this HW engine.
+ 	  Say Y if you want to support CPUFreq HW.
+ 
++config ARM_QCOM_CPUFREQ_KRAIT
++	tristate "CPU Frequency scaling support for Krait SoCs"
++	depends on ARCH_QCOM || COMPILE_TEST
++	select PM_OPP
++	select ARM_QCOM_CPUFREQ_NVMEM
++	help
++	  This adds the CPUFreq driver for Qualcomm Krait SoC based boards.
++	  This scale the cache clk and regulator based on the different cpu
++	  clks when scaling the different cores clk.
++
++	  If in doubt, say N.
++
+ config ARM_RASPBERRYPI_CPUFREQ
+ 	tristate "Raspberry Pi cpufreq support"
+ 	depends on CLK_RASPBERRYPI || COMPILE_TEST
+@@ -339,4 +351,4 @@ config ARM_PXA2xx_CPUFREQ
+ 	help
+ 	  This add the CPUFreq driver support for Intel PXA2xx SOCs.
+ 
+-	  If in doubt, say N.
++	  If in doubt, say N.
+\ No newline at end of file
+--- a/drivers/cpufreq/Makefile
++++ b/drivers/cpufreq/Makefile
+@@ -63,6 +63,7 @@ obj-$(CONFIG_ARM_PXA2xx_CPUFREQ)	+= pxa2
+ obj-$(CONFIG_PXA3xx)			+= pxa3xx-cpufreq.o
+ obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW)	+= qcom-cpufreq-hw.o
+ obj-$(CONFIG_ARM_QCOM_CPUFREQ_NVMEM)	+= qcom-cpufreq-nvmem.o
++obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRAIT)	+= qcom-cpufreq-krait.o
+ obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) 	+= raspberrypi-cpufreq.o
+ obj-$(CONFIG_ARM_S3C2410_CPUFREQ)	+= s3c2410-cpufreq.o
+ obj-$(CONFIG_ARM_S3C2412_CPUFREQ)	+= s3c2412-cpufreq.o
+@@ -86,6 +87,7 @@ obj-$(CONFIG_ARM_TEGRA186_CPUFREQ)	+= te
+ obj-$(CONFIG_ARM_TEGRA194_CPUFREQ)	+= tegra194-cpufreq.o
+ obj-$(CONFIG_ARM_TI_CPUFREQ)		+= ti-cpufreq.o
+ obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ)	+= vexpress-spc-cpufreq.o
++obj-$(CONFIG_ARM_KRAIT_CPUFREQ)		+= krait-cpufreq.o
+ 
+ 
+ ##################################################################################
+--- /dev/null
++++ b/drivers/cpufreq/qcom-cpufreq-krait.c
+@@ -0,0 +1,601 @@
++// SPDX-License-Identifier: GPL-2.0
++
++#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
++
++#include <linux/clk.h>
++#include <linux/cpu.h>
++#include <linux/cpufreq.h>
++#include <linux/cpumask.h>
++#include <linux/err.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/pm_opp.h>
++#include <linux/platform_device.h>
++#include <linux/regulator/consumer.h>
++#include <linux/slab.h>
++#include <linux/thermal.h>
++
++#include "cpufreq-dt.h"
++
++static struct platform_device *l2_pdev;
++
++struct private_data {
++	struct opp_table *opp_table;
++	struct device *cpu_dev;
++	const char *reg_name;
++	bool have_static_opps;
++};
++
++static int set_target(struct cpufreq_policy *policy, unsigned int index)
++{
++	struct private_data *priv = policy->driver_data;
++	unsigned long freq = policy->freq_table[index].frequency;
++	unsigned long target_freq = freq * 1000;
++	struct dev_pm_opp *opp;
++	unsigned int level;
++	int cpu, ret;
++
++	if (l2_pdev) {
++		/* find the max freq across all core */
++		for_each_present_cpu(cpu)
++			if (cpu != index)
++				target_freq = max(
++					target_freq,
++					(unsigned long)cpufreq_quick_get(cpu));
++
++		opp = dev_pm_opp_find_freq_exact(priv->cpu_dev, target_freq,
++						 true);
++		if (IS_ERR(opp)) {
++			dev_err(&l2_pdev->dev, "failed to find OPP for %ld\n",
++				target_freq);
++			return PTR_ERR(opp);
++		}
++		level = dev_pm_opp_get_level(opp);
++		dev_pm_opp_put(opp);
++
++		opp = dev_pm_opp_find_level_exact(&l2_pdev->dev, level);
++		if (IS_ERR(opp)) {
++			dev_err(&l2_pdev->dev,
++				"failed to find level OPP for %d\n", level);
++			return PTR_ERR(opp);
++		}
++		target_freq = dev_pm_opp_get_freq(opp);
++		dev_pm_opp_put(opp);
++
++		ret = dev_pm_opp_set_rate(&l2_pdev->dev, target_freq);
++		if (ret)
++			return ret;
++
++		/*
++		 * Hardware constraint:
++		 * Krait CPU cannot operate at 384MHz with L2 at 1Ghz.
++		 * Assume index 0 with the idle freq and level > 0 as 
++		 * any L2 freq > 384MHz.
++		 * Skip CPU freq change in this corner case.
++		 */
++		if (unlikely(index == 0 && level != 0)) {
++			dev_err(priv->cpu_dev, "Krait CPU can't operate at idle freq with L2 at 1GHz");
++			return -EINVAL;
++		}
++	}
++
++	ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
++	if (ret)
++		return ret;
++
++	arch_set_freq_scale(policy->related_cpus, freq,
++			    policy->cpuinfo.max_freq);
++
++	return 0;
++}
++
++/*
++ * An earlier version of opp-v1 bindings used to name the regulator
++ * "cpu0-supply", we still need to handle that for backwards compatibility.
++ */
++static const char *find_supply_name(struct device *dev)
++{
++	struct device_node *np;
++	struct property *pp;
++	int cpu = dev->id;
++	const char *name = NULL;
++
++	np = of_node_get(dev->of_node);
++
++	/* This must be valid for sure */
++	if (WARN_ON(!np))
++		return NULL;
++
++	/* Try "cpu0" for older DTs */
++	if (!cpu) {
++		pp = of_find_property(np, "cpu0-supply", NULL);
++		if (pp) {
++			name = "cpu0";
++			goto node_put;
++		}
++	}
++
++	pp = of_find_property(np, "cpu-supply", NULL);
++	if (pp) {
++		name = "cpu";
++		goto node_put;
++	}
++
++	dev_dbg(dev, "no regulator for cpu%d\n", cpu);
++node_put:
++	of_node_put(np);
++	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);
++
++	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;
++	unsigned int transition_latency;
++	struct private_data *priv;
++	struct device *cpu_dev;
++	bool fallback = false;
++	struct clk *cpu_clk;
++	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);
++		return -ENODEV;
++	}
++
++	cpu_clk = clk_get(cpu_dev, NULL);
++	if (IS_ERR(cpu_clk)) {
++		ret = PTR_ERR(cpu_clk);
++		dev_err(cpu_dev, "%s: failed to get clk: %d\n", __func__, ret);
++		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.
++	 *
++	 * For platforms not using operating-points-v2 bindings, we do this
++	 * before updating policy->cpus. Otherwise, we will end up creating
++	 * duplicate OPPs for policy->cpus.
++	 *
++	 * OPPs might be populated at runtime, don't check for error here
++	 */
++	if (!dev_pm_opp_of_cpumask_add_table(policy->cpus))
++		priv->have_static_opps = true;
++
++	/*
++	 * But we need OPP table to function so if it is not there let's
++	 * give platform code chance to provide it for us.
++	 */
++	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;
++		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;
++
++	policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
++
++	transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev);
++	if (!transition_latency)
++		transition_latency = CPUFREQ_ETERNAL;
++
++	policy->cpuinfo.transition_latency = transition_latency;
++	policy->dvfs_possible_from_any_cpu = true;
++
++	dev_pm_opp_of_register_em(cpu_dev, policy->cpus);
++
++	return 0;
++
++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;
++}
++
++static int cpufreq_online(struct cpufreq_policy *policy)
++{
++	/* We did light-weight tear down earlier, nothing to do here */
++	return 0;
++}
++
++static int cpufreq_offline(struct cpufreq_policy *policy)
++{
++	/*
++	 * Preserve policy->driver_data and don't free resources on light-weight
++	 * tear down.
++	 */
++	return 0;
++}
++
++static int cpufreq_exit(struct cpufreq_policy *policy)
++{
++	struct private_data *priv = policy->driver_data;
++
++	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;
++}
++
++static struct cpufreq_driver krait_cpufreq_driver = {
++	.flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK |
++		 CPUFREQ_IS_COOLING_DEV,
++	.verify = cpufreq_generic_frequency_table_verify,
++	.target_index = set_target,
++	.get = cpufreq_generic_get,
++	.init = cpufreq_init,
++	.exit = cpufreq_exit,
++	.online = cpufreq_online,
++	.offline = cpufreq_offline,
++	.name = "krait-cpufreq",
++	.suspend = cpufreq_generic_suspend,
++};
++
++struct krait_data {
++	unsigned long idle_freq;
++	bool regulator_enabled;
++};
++
++static int krait_cache_set_opp(struct dev_pm_set_opp_data *data)
++{
++	unsigned long old_freq = data->old_opp.rate, freq = data->new_opp.rate;
++	struct dev_pm_opp_supply *supply = &data->new_opp.supplies[0];
++	struct regulator *reg = data->regulators[0];
++	struct clk *clk = data->clk;
++	struct krait_data *kdata;
++	unsigned long idle_freq;
++	int ret;
++
++	kdata = (struct krait_data *)dev_get_drvdata(data->dev);
++	idle_freq = kdata->idle_freq;
++
++	/* Scaling up? Scale voltage before frequency */
++	if (freq >= old_freq) {
++		ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
++						    supply->u_volt,
++						    supply->u_volt_max);
++		if (ret)
++			goto exit;
++	}
++
++	/*
++	 * Set to idle bin if switching from normal to high bin
++	 * or vice versa. It has been notice that a bug is triggered
++	 * in cache scaling when more than one bin is scaled, to fix
++	 * this we first need to transition to the base rate and then
++	 * to target rate
++	 */
++	if (likely(freq != idle_freq && old_freq != idle_freq)) {
++		ret = clk_set_rate(clk, idle_freq);
++		if (ret)
++			goto exit;
++	}
++
++	ret = clk_set_rate(clk, freq);
++	if (ret)
++		goto exit;
++
++	/* Scaling down? Scale voltage after frequency */
++	if (freq < old_freq) {
++		ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
++						    supply->u_volt,
++						    supply->u_volt_max);
++	}
++
++	if (unlikely(!kdata->regulator_enabled)) {
++		ret = regulator_enable(reg);
++		if (ret < 0)
++			dev_warn(data->dev, "Failed to enable regulator: %d", ret);
++		else
++			kdata->regulator_enabled = true;
++	}
++
++exit:
++	return ret;
++};
++
++static int krait_cache_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct krait_data *data;
++	struct opp_table *table;
++	struct dev_pm_opp *opp;
++	struct device *cpu_dev;
++	int ret;
++
++	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
++	if (!data)
++		return -ENOMEM;
++
++	table = dev_pm_opp_set_regulators(dev, (const char *[]){ "l2" }, 1);
++	if (IS_ERR(table)) {
++		ret = PTR_ERR(table);
++		if (ret != -EPROBE_DEFER)
++			dev_err(dev, "failed to set regulators %d\n", ret);
++
++		return ret;
++	}
++
++	ret = PTR_ERR_OR_ZERO(
++		dev_pm_opp_register_set_opp_helper(dev, krait_cache_set_opp));
++	if (ret)
++		return ret;
++
++	ret = dev_pm_opp_of_add_table(dev);
++	if (ret) {
++		dev_err(dev, "failed to parse L2 freq thresholds\n");
++		return ret;
++	}
++
++	opp = dev_pm_opp_find_freq_ceil(dev, &data->idle_freq);
++	dev_pm_opp_put(opp);
++
++	/*
++	 * Check opp-level configuration
++	 * At least 2 level must be set or the cache will always be scaled
++	 * the idle freq causing some performance problem
++	 *
++	 * In case of invalid configuration, the l2 scaling is skipped
++	 */
++	cpu_dev = get_cpu_device(0);
++	if (!cpu_dev) {
++		pr_err("failed to get cpu0 device\n");
++		return -ENODEV;
++	}
++
++	/*
++	 * Check if we have at least opp-level 1, 0 should always be set to
++	 * the idle freq
++	 */
++	opp = dev_pm_opp_find_level_exact(dev, 1);
++	if (IS_ERR(opp)) {
++		dev_err(dev,
++			"Invalid configuration found of l2 opp. Can't find opp-level 1");
++		goto invalid_conf;
++	}
++	dev_pm_opp_put(opp);
++
++	/*
++	 * Check if we have at least opp-level 1 in the cpu opp, 0 should always
++	 * be set to the idle freq
++	 */
++	opp = dev_pm_opp_find_level_exact(cpu_dev, 1);
++	if (IS_ERR(opp)) {
++		dev_err(dev,
++			"Invalid configuration found of cpu opp. Can't find opp-level 1");
++		goto invalid_conf;
++	}
++	dev_pm_opp_put(opp);
++
++	platform_set_drvdata(pdev, data);
++
++	/* The l2 scaling is enabled by linking the cpufreq driver */
++	l2_pdev = pdev;
++
++	return 0;
++
++invalid_conf:
++	dev_pm_opp_remove_table(dev);
++	dev_pm_opp_put_regulators(table);
++	dev_pm_opp_unregister_set_opp_helper(table);
++
++	return -EINVAL;
++};
++
++static int krait_cache_remove(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct opp_table *table = dev_pm_opp_get_opp_table(dev);
++
++	dev_pm_opp_remove_table(dev);
++	dev_pm_opp_put_regulators(table);
++	dev_pm_opp_unregister_set_opp_helper(table);
++
++	return 0;
++};
++
++static const struct of_device_id krait_cache_match_table[] = {
++	{ .compatible = "qcom,krait-cache" },
++	{}
++};
++
++static struct platform_driver krait_cache_driver = {
++	.driver = {
++		.name	= "krait-cache",
++		.of_match_table = krait_cache_match_table,
++	},
++	.probe		= krait_cache_probe,
++	.remove		= krait_cache_remove,
++};
++module_platform_driver(krait_cache_driver);
++
++static int krait_cpufreq_probe(struct platform_device *pdev)
++{
++	struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev);
++	int ret;
++
++	/*
++	 * 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 ?
++	 */
++	ret = resources_available();
++	if (ret)
++		return ret;
++
++	if (data) {
++		if (data->have_governor_per_policy)
++			krait_cpufreq_driver.flags |=
++				CPUFREQ_HAVE_GOVERNOR_PER_POLICY;
++
++		krait_cpufreq_driver.resume = data->resume;
++		if (data->suspend)
++			krait_cpufreq_driver.suspend = data->suspend;
++	}
++
++	ret = cpufreq_register_driver(&krait_cpufreq_driver);
++	if (ret)
++		dev_err(&pdev->dev, "failed register driver: %d\n", ret);
++
++	return ret;
++}
++
++static int krait_cpufreq_remove(struct platform_device *pdev)
++{
++	cpufreq_unregister_driver(&krait_cpufreq_driver);
++	return 0;
++}
++
++static struct platform_driver krait_cpufreq_platdrv = {
++	.driver = {
++		.name	= "krait-cpufreq",
++	},
++	.probe		= krait_cpufreq_probe,
++	.remove		= krait_cpufreq_remove,
++};
++module_platform_driver(krait_cpufreq_platdrv);
++
++MODULE_ALIAS("platform:krait-cpufreq");
++MODULE_AUTHOR("Ansuel Smith <ansuelsmth@gmail.com>");
++MODULE_DESCRIPTION("Dedicated Krait SoC cpufreq driver");
++MODULE_LICENSE("GPL");
diff --git a/target/linux/ipq806x/patches-5.10/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch b/target/linux/ipq806x/patches-5.10/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch
new file mode 100644
index 0000000000..81ec0883cd
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.10/098-2-Documentation-cpufreq-add-qcom-krait-cpufreq-binding.patch
@@ -0,0 +1,243 @@
+From c9ecd920324a647bf1f2b47f771c8f599cc7b551 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Sat, 22 Feb 2020 18:02:17 +0100
+Subject: [PATCH 2/8] Documentation: cpufreq: add qcom,krait-cache bindings
+
+Document dedicated cpufreq for Krait CPUs.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+---
+ .../bindings/cpufreq/qcom-cpufreq-krait.yaml  | 221 ++++++++++++++++++
+ 1 file changed, 221 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml
+
+diff --git a/Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml b/Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml
+new file mode 100644
+index 000000000000..f6bcca863d9a
+--- /dev/null
++++ b/Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-krait.yaml
+@@ -0,0 +1,221 @@
++# SPDX-License-Identifier: GPL-2.0
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/cpufreq/qcom-cpufreq-krait.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: CPU Frequency scaling driver for Krait SoCs
++
++maintainers:
++  - Ansuel Smith <ansuelsmth@gmail.com>
++
++description: |
++  The krait cpufreq driver is a dedicated frequency scaling driver
++  based on cpufreq-dt generic driver that scale L2 cache and the
++  cores. TEST
++
++  The L2 cache is scaled based on the max clk across all cores and
++  the clock is decided based on the opp-level set in the device tree.
++
++  Different core freq can be linked to a specific l2 freq and the driver
++  on frequency change will scale the core and the l2 clk based of the 
++  linked freq.
++
++  On Krait SoC is present a bug and on every L2 clk change the driver
++  needs to set the clk to the idle freq before changing it to the new value.
++
++  This requires the qcom cpufreq nvmem driver to parse the different opp
++  core clk and an additional opp table for the l2 scaling.
++
++  If the driver detect broken config (for example missing opp-level) the
++  cpufreq driver skips the l2 scaling
++
++  Referring to this example opp-level can be used to link a range of cpu freq
++  to a specific l2 freq:
++    cpu opp freq 384000000 has opp-level 0
++    l2 opp freq 384000000 has opp-level 0
++    The driver will scale l2 to 384000000
++
++    cpu opp freq 600000000-1000000000 has opp-level 1
++    l2 opp freq 1000000000 has opp-level 1
++    The driver will scale l2 to 1000000000
++
++allOf:
++  - $ref: /schemas/cache-controller.yaml#
++
++select:
++  properties:
++    compatible:
++      items:
++        - enum:
++            - qcom,krait-cache
++
++  required:
++    - compatible
++
++properties:
++  compatible:
++    items:
++      - const: qcom,krait-cache
++      - const: cache
++
++  cache-level:
++    const: 2
++
++  clocks:
++    maxItems: 1
++
++  clock-names:
++    const: l2
++
++  l2-supply: true
++
++  operating-points-v2: true
++
++required:
++  - compatible
++  - cache-level
++  - clocks
++  - clock-names
++  - l2-supply
++  - operating-points-v2
++
++additionalProperties: false
++
++examples:
++  - |
++    cpus {
++      #address-cells = <1>;
++      #size-cells = <0>;
++
++      cpu0: cpu@0 {
++        compatible = "qcom,krait";
++        enable-method = "qcom,kpss-acc-v1";
++        device_type = "cpu";
++        reg = <0>;
++        next-level-cache = <&L2>;
++        qcom,acc = <&acc0>;
++        qcom,saw = <&saw0>;
++        clocks = <&kraitcc 0>, <&kraitcc 4>;
++        clock-names = "cpu", "l2";
++        clock-latency = <100000>;
++        cpu-supply = <&smb208_s2a>;
++        operating-points-v2 = <&opp_table0>;
++        voltage-tolerance = <5>;
++        cooling-min-state = <0>;
++        cooling-max-state = <10>;
++        #cooling-cells = <2>;
++        cpu-idle-states = <&CPU_SPC>;
++      };
++
++      /* ... */
++
++    };
++
++    opp_table0: opp_table0 {
++      compatible = "operating-points-v2-kryo-cpu";
++      nvmem-cells = <&speedbin_efuse>;
++
++      opp-384000000 {
++        opp-hz = /bits/ 64 <384000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1000000>;
++        opp-microvolt-speed0-pvs1-v0 = <925000>;
++        opp-microvolt-speed0-pvs2-v0 = <875000>;
++        opp-microvolt-speed0-pvs3-v0 = <800000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <0>;
++      };
++
++      opp-600000000 {
++        opp-hz = /bits/ 64 <600000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1050000>;
++        opp-microvolt-speed0-pvs1-v0 = <975000>;
++        opp-microvolt-speed0-pvs2-v0 = <925000>;
++        opp-microvolt-speed0-pvs3-v0 = <850000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <1>;
++      };
++
++      opp-800000000 {
++        opp-hz = /bits/ 64 <800000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1100000>;
++        opp-microvolt-speed0-pvs1-v0 = <1025000>;
++        opp-microvolt-speed0-pvs2-v0 = <995000>;
++        opp-microvolt-speed0-pvs3-v0 = <900000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <1>;
++      };
++
++      opp-1000000000 {
++        opp-hz = /bits/ 64 <1000000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1150000>;
++        opp-microvolt-speed0-pvs1-v0 = <1075000>;
++        opp-microvolt-speed0-pvs2-v0 = <1025000>;
++        opp-microvolt-speed0-pvs3-v0 = <950000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <1>;
++      };
++
++      opp-1200000000 {
++        opp-hz = /bits/ 64 <1200000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1200000>;
++        opp-microvolt-speed0-pvs1-v0 = <1125000>;
++        opp-microvolt-speed0-pvs2-v0 = <1075000>;
++        opp-microvolt-speed0-pvs3-v0 = <1000000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <2>;
++      };
++
++      opp-1400000000 {
++        opp-hz = /bits/ 64 <1400000000>;
++        opp-microvolt-speed0-pvs0-v0 = <1250000>;
++        opp-microvolt-speed0-pvs1-v0 = <1175000>;
++        opp-microvolt-speed0-pvs2-v0 = <1125000>;
++        opp-microvolt-speed0-pvs3-v0 = <1050000>;
++        opp-supported-hw = <0x1>;
++        clock-latency-ns = <100000>;
++        opp-level = <2>;
++      };
++    };
++
++    opp_table_l2: opp_table_l2 {
++      compatible = "operating-points-v2";
++
++      opp-384000000 {
++        opp-hz = /bits/ 64 <384000000>;
++        opp-microvolt = <1100000>;
++        clock-latency-ns = <100000>;
++        opp-level = <0>;
++      };
++      opp-1000000000 {
++        opp-hz = /bits/ 64 <1000000000>;
++        opp-microvolt = <1100000>;
++        clock-latency-ns = <100000>;
++        opp-level = <1>;
++      };
++      opp-1200000000 {
++        opp-hz = /bits/ 64 <1200000000>;
++        opp-microvolt = <1150000>;
++        clock-latency-ns = <100000>;
++        opp-level = <2>;
++      };
++    };
++
++    soc {
++      L2: l2-cache {
++        compatible = "qcom,krait-cache", "cache";
++        cache-level = <2>;
++
++        clocks = <&kraitcc 4>;
++        clock-names = "l2";
++        l2-supply = <&smb208_s1a>;
++        operating-points-v2 = <&opp_table_l2>;
++      };
++    };
++
++...
+-- 
+2.29.2
+
diff --git a/target/linux/ipq806x/patches-5.10/0057-add-fab-scaling-support-with-cpufreq.patch b/target/linux/ipq806x/patches-5.10/098-3-add-fab-scaling-support-with-cpufreq.patch
index 441500df79..29dff3297d 100644
--- a/target/linux/ipq806x/patches-5.10/0057-add-fab-scaling-support-with-cpufreq.patch
+++ b/target/linux/ipq806x/patches-5.10/098-3-add-fab-scaling-support-with-cpufreq.patch
@@ -217,9 +217,9 @@
 +int scale_fabrics(unsigned long max_cpu_freq);
 +
 +#endif
---- a/drivers/cpufreq/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -20,6 +20,7 @@
+--- a/drivers/cpufreq/qcom-cpufreq-krait.c
++++ b/drivers/cpufreq/qcom-cpufreq-krait.c
+@@ -15,6 +15,7 @@
  #include <linux/regulator/consumer.h>
  #include <linux/slab.h>
  #include <linux/thermal.h>
@@ -227,17 +227,17 @@
  
  #include "cpufreq-dt.h"
  
-@@ -111,6 +112,13 @@ static int set_target(struct cpufreq_pol
- 					}
- 				}
- 			}
-+
-+			/*
-+			 * Scale fabrics with max freq across all cores
-+			 */
-+			ret = scale_fabrics(target_freq);
-+			if (ret)
-+				goto exit;
- 		}
- 		priv->opp_freq = freq * 1000;
- 		arch_set_freq_scale(policy->related_cpus, freq,
+@@ -58,6 +59,13 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
+ 		level = dev_pm_opp_get_level(opp);
+ 		dev_pm_opp_put(opp);
+ 
++		/*
++		 * Scale fabrics with max freq across all cores
++		 */
++		ret = scale_fabrics(target_freq);
++		if (ret)
++			return ret;
++
+ 		opp = dev_pm_opp_find_level_exact(&l2_pdev->dev, level);
+ 		if (IS_ERR(opp)) {
+ 			dev_err(&l2_pdev->dev,