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Message-Id: <20250711-mt8196-cpufreq-v1-4-e1b0a3b4ac61@collabora.com>
Date: Fri, 11 Jul 2025 16:57:36 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Hector Yuan <hector.yuan@...iatek.com>
Cc: kernel@...labora.com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-pm@...r.kernel.org,
Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 4/5] cpufreq: mediatek-hw: Separate per-domain and
per-instance data
As it stood, the mediatek cpufreq driver could get away with never
really having a private driver instance struct. This is because all data
was stored in the per-domain structs.
However, this complicates matters when actual per-instance data like the
variant struct is introduced. Instead of having a pointer to it for
every domain, have a pointer to a global "priv" struct that can be
extended over time, and rename the "data" struct to "domain" to
distinguish its purpose better.
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
drivers/cpufreq/mediatek-cpufreq-hw.c | 42 ++++++++++++++++++++++-------------
1 file changed, 27 insertions(+), 15 deletions(-)
diff --git a/drivers/cpufreq/mediatek-cpufreq-hw.c b/drivers/cpufreq/mediatek-cpufreq-hw.c
index b2aba1842226c7d24a8b9599ea62408cac9f803c..53611077d0d9a2d9865cf771568ab71abc0e6fbd 100644
--- a/drivers/cpufreq/mediatek-cpufreq-hw.c
+++ b/drivers/cpufreq/mediatek-cpufreq-hw.c
@@ -35,13 +35,17 @@ enum {
REG_ARRAY_SIZE,
};
-struct mtk_cpufreq_data {
+struct mtk_cpufreq_priv {
+ const struct mtk_cpufreq_variant *variant;
+};
+
+struct mtk_cpufreq_domain {
+ struct mtk_cpufreq_priv *parent;
struct cpufreq_frequency_table *table;
void __iomem *reg_bases[REG_ARRAY_SIZE];
struct resource *res;
void __iomem *base;
int nr_opp;
- const struct mtk_cpufreq_variant *variant;
};
struct mtk_cpufreq_variant {
@@ -63,7 +67,7 @@ static int __maybe_unused
mtk_cpufreq_get_cpu_power(struct device *cpu_dev, unsigned long *uW,
unsigned long *KHz)
{
- struct mtk_cpufreq_data *data;
+ struct mtk_cpufreq_domain *data;
struct cpufreq_policy *policy;
int i;
@@ -90,7 +94,7 @@ mtk_cpufreq_get_cpu_power(struct device *cpu_dev, unsigned long *uW,
static int mtk_cpufreq_hw_target_index(struct cpufreq_policy *policy,
unsigned int index)
{
- struct mtk_cpufreq_data *data = policy->driver_data;
+ struct mtk_cpufreq_domain *data = policy->driver_data;
writel_relaxed(index, data->reg_bases[REG_FREQ_PERF_STATE]);
@@ -99,7 +103,7 @@ static int mtk_cpufreq_hw_target_index(struct cpufreq_policy *policy,
static unsigned int mtk_cpufreq_hw_get(unsigned int cpu)
{
- struct mtk_cpufreq_data *data;
+ struct mtk_cpufreq_domain *data;
struct cpufreq_policy *policy;
unsigned int index;
@@ -118,7 +122,7 @@ static unsigned int mtk_cpufreq_hw_get(unsigned int cpu)
static unsigned int mtk_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
unsigned int target_freq)
{
- struct mtk_cpufreq_data *data = policy->driver_data;
+ struct mtk_cpufreq_domain *data = policy->driver_data;
unsigned int index;
index = cpufreq_table_find_index_dl(policy, target_freq, false);
@@ -129,7 +133,7 @@ static unsigned int mtk_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
}
static int mtk_cpu_create_freq_table(struct platform_device *pdev,
- struct mtk_cpufreq_data *data)
+ struct mtk_cpufreq_domain *data)
{
struct device *dev = &pdev->dev;
u32 temp, i, freq, prev_freq = 0;
@@ -164,9 +168,9 @@ static int mtk_cpu_create_freq_table(struct platform_device *pdev,
static int mtk_cpu_resources_init(struct platform_device *pdev,
struct cpufreq_policy *policy,
- const struct mtk_cpufreq_variant *variant)
+ struct mtk_cpufreq_priv *priv)
{
- struct mtk_cpufreq_data *data;
+ struct mtk_cpufreq_domain *data;
struct device *dev = &pdev->dev;
struct resource *res;
struct of_phandle_args args;
@@ -187,6 +191,8 @@ static int mtk_cpu_resources_init(struct platform_device *pdev,
index = args.args[0];
of_node_put(args.np);
+ data->parent = priv;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, index);
if (!res) {
dev_err(dev, "failed to get mem resource %d\n", index);
@@ -207,10 +213,9 @@ static int mtk_cpu_resources_init(struct platform_device *pdev,
data->base = base;
data->res = res;
- data->variant = variant;
for (i = REG_FREQ_LUT_TABLE; i < REG_ARRAY_SIZE; i++)
- data->reg_bases[i] = base + variant->reg_offsets[i];
+ data->reg_bases[i] = base + priv->variant->reg_offsets[i];
ret = mtk_cpu_create_freq_table(pdev, data);
if (ret) {
@@ -231,7 +236,7 @@ static int mtk_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
{
struct platform_device *pdev = cpufreq_get_driver_data();
int sig, pwr_hw = CPUFREQ_HW_STATUS | SVS_HW_STATUS;
- struct mtk_cpufreq_data *data;
+ struct mtk_cpufreq_domain *data;
unsigned int latency;
int ret;
@@ -270,7 +275,7 @@ static int mtk_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
static void mtk_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
{
- struct mtk_cpufreq_data *data = policy->driver_data;
+ struct mtk_cpufreq_domain *data = policy->driver_data;
struct resource *res = data->res;
void __iomem *base = data->base;
@@ -283,7 +288,7 @@ static void mtk_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
static void mtk_cpufreq_register_em(struct cpufreq_policy *policy)
{
struct em_data_callback em_cb = EM_DATA_CB(mtk_cpufreq_get_cpu_power);
- struct mtk_cpufreq_data *data = policy->driver_data;
+ struct mtk_cpufreq_domain *data = policy->driver_data;
em_dev_register_perf_domain(get_cpu_device(policy->cpu), data->nr_opp,
&em_cb, policy->cpus, true);
@@ -305,6 +310,7 @@ static struct cpufreq_driver cpufreq_mtk_hw_driver = {
static int mtk_cpufreq_hw_driver_probe(struct platform_device *pdev)
{
+ struct mtk_cpufreq_priv *priv;
const void *data;
int ret, cpu;
struct device *cpu_dev;
@@ -328,7 +334,13 @@ static int mtk_cpufreq_hw_driver_probe(struct platform_device *pdev)
if (!data)
return -EINVAL;
- platform_set_drvdata(pdev, (void *) data);
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->variant = data;
+
+ platform_set_drvdata(pdev, priv);
cpufreq_mtk_hw_driver.driver_data = pdev;
ret = cpufreq_register_driver(&cpufreq_mtk_hw_driver);
--
2.50.0
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