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authorAnsuel Smith <ansuelsmth@gmail.com>2020-01-26 04:30:52 +0100
committerPetr Štetiar <ynezz@true.cz>2020-03-03 23:38:23 +0100
commitc692d896eb6315edb46df851f5ecd96c49e2b65d (patch)
tree3810a40c86548c013383e50c7b3e25ab0ca975bf /target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
parent583111c1245b8db982c160f501e5c3f61332a40f (diff)
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ipq806x: rework L2 cache patch
Rework l2 scaling patch to fix some compile warning and to imporve the caling timings by removing call to unnecessary function. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Diffstat (limited to 'target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch')
-rw-r--r--target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch70
1 files changed, 54 insertions, 16 deletions
diff --git a/target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch b/target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
index 5f54120b3a..910c2b1722 100644
--- a/target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
+++ b/target/linux/ipq806x/patches-5.4/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
@@ -1,13 +1,25 @@
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -48,16 +48,71 @@ static int set_target(struct cpufreq_pol
+@@ -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_vol;
++ unsigned long l2_vol, target_l2_volt;
+ unsigned long target_freq;
int ret;
@@ -16,20 +28,19 @@
if (!ret) {
+ if (policy->l2_rate_set) {
-+ static unsigned long krait_l2[CONFIG_NR_CPUS] = { };
+ int cpu, l2_index, tol = 0;
-+
+ target_freq = freq * 1000;
+
-+ krait_l2[policy->cpu] = target_freq;
++ cpus_shared_data->curr_freq_table[policy->cpu] = target_freq;
+ for_each_present_cpu(cpu)
-+ target_freq = max(target_freq, krait_l2[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--)
++ for (l2_index = 2; l2_index > 0; l2_index--)
+ if (target_freq >= policy->l2_cpufreq[l2_index])
+ break;
+
-+ l2_freq = clk_get_rate(l2_clk);
++ l2_freq = cpus_shared_data->curr_l2_freq;
+ target_l2_freq = policy->l2_rate[l2_index];
+
+ if (l2_freq != target_l2_freq) {
@@ -44,21 +55,24 @@
+ 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 = regulator_get_voltage(l2_regulator);
-+ target_l2_vol = policy->l2_volt[l2_index];
++ l2_vol = cpus_shared_data->curr_l2_volt;
++ target_l2_volt = policy->l2_volt[l2_index];
+
-+ if (l2_vol != target_l2_vol) {
-+ tol = target_l2_vol * policy->l2_volt_tol / 100;
-+ ret = regulator_set_voltage_tol(l2_regulator,target_l2_vol,tol);
++ 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;
+ }
+ }
+ }
@@ -72,7 +86,7 @@
mutex_unlock(&priv->lock);
return ret;
-@@ -200,6 +255,9 @@ static int cpufreq_init(struct cpufreq_p
+@@ -195,6 +260,9 @@ static int cpufreq_init(struct cpufreq_p
bool fallback = false;
const char *name;
int ret;
@@ -82,7 +96,7 @@
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
-@@ -307,6 +365,57 @@ static int cpufreq_init(struct cpufreq_p
+@@ -302,6 +370,57 @@ static int cpufreq_init(struct cpufreq_p
policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
@@ -140,9 +154,33 @@
/* 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
-@@ -72,7 +72,15 @@ struct cpufreq_policy {
+@@ -58,7 +58,15 @@ struct cpufreq_policy {
should set cpufreq */
unsigned int cpu; /* cpu managing this policy, must be online */