200 lines
5.8 KiB
Diff
200 lines
5.8 KiB
Diff
--- 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 */
|