ipq806x: add kernel 4.14 support

 - Rebased the patches for 4.14
 - Dropped spi-qup and 0027, 0028, 0029
   clk patches since it's already included
   in upstream.

 Tested on IPQ AP148 Board:
  1) NOR boot and NAND boot
  2) Tested USB and PCIe interfaces
  3) WDOG test
  4) cpu frequency scaling
  5) ethernet, 2G and 5G WiFi
  6) ubi sysupgrade

Signed-off-by: Ram Chandra Jangir <rjangir@codeaurora.org>
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>

1 files changed, 131 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-4.14/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch b/target/linux/ipq806x/patches-4.14/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch
new file mode 100644
index 0000000000..47c64eca82
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.14/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch
@@ -0,0 +1,131 @@
+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
+@@ -32,6 +32,9 @@ struct private_data {
+	struct device *cpu_dev;
+	struct thermal_cooling_device *cdev;
+	const char *reg_name;
++	struct notifier_block opp_nb;
++	struct mutex lock;
++	unsigned long opp_freq;
+ };
+
+ static struct freq_attr *cpufreq_dt_attr[] = {
+@@ -43,9 +46,16 @@ static struct freq_attr *cpufreq_dt_attr
+ static int set_target(struct cpufreq_policy *policy, unsigned int index)
+ {
+	struct private_data *priv = policy->driver_data;
++	int ret;
++	unsigned long target_freq = policy->freq_table[index].frequency * 1000;
++
++	mutex_lock(&priv->lock);
++	ret = dev_pm_opp_set_rate(priv->cpu_dev, target_freq);
++	if (!ret)
++		priv->opp_freq = target_freq;
++	mutex_unlock(&priv->lock);
+
+-	return dev_pm_opp_set_rate(priv->cpu_dev,
+-				   policy->freq_table[index].frequency * 1000);
++	return ret;
+ }
+
+ /*
+@@ -86,6 +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;
+@@ -152,6 +195,7 @@ static int cpufreq_init(struct cpufreq_p
+	bool fallback = false;
+	const char *name;
+	int ret;
++	struct srcu_notifier_head *opp_srcu_head;
+
+	cpu_dev = get_cpu_device(policy->cpu);
+	if (!cpu_dev) {
+@@ -241,13 +285,16 @@ static int cpufreq_init(struct cpufreq_p
+		goto out_free_opp;
+	}
+
++	mutex_init(&priv->lock);
++	dev_pm_opp_register_notifier(cpu_dev, &priv->opp_nb);
++
+	priv->reg_name = name;
+	priv->opp_table = opp_table;
+
+	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_priv;
++		goto out_unregister_nb;
+	}
+
+	priv->cpu_dev = cpu_dev;
+@@ -283,6 +343,8 @@ 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_priv:
+	kfree(priv);
+ out_free_opp: