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Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/core.c329
-rw-r--r--drivers/opp/debugfs.c24
-rw-r--r--drivers/opp/of.c92
-rw-r--r--drivers/opp/opp.h8
-rw-r--r--drivers/opp/ti-opp-supply.c8
5 files changed, 222 insertions, 239 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index c4e0432ae42a..73e9a3b2f29b 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -101,11 +101,55 @@ struct opp_table *_find_opp_table(struct device *dev)
* representation in the OPP table and manage the clock configuration themselves
* in an platform specific way.
*/
-static bool assert_single_clk(struct opp_table *opp_table)
+static bool assert_single_clk(struct opp_table *opp_table,
+ unsigned int __always_unused index)
{
return !WARN_ON(opp_table->clk_count > 1);
}
+/*
+ * Returns true if clock table is large enough to contain the clock index.
+ */
+static bool assert_clk_index(struct opp_table *opp_table,
+ unsigned int index)
+{
+ return opp_table->clk_count > index;
+}
+
+/*
+ * Returns true if bandwidth table is large enough to contain the bandwidth index.
+ */
+static bool assert_bandwidth_index(struct opp_table *opp_table,
+ unsigned int index)
+{
+ return opp_table->path_count > index;
+}
+
+/**
+ * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an opp
+ * @opp: opp for which bandwidth has to be returned for
+ * @peak: select peak or average bandwidth
+ * @index: bandwidth index
+ *
+ * Return: bandwidth in kBps, else return 0
+ */
+unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, bool peak, int index)
+{
+ if (IS_ERR_OR_NULL(opp)) {
+ pr_err("%s: Invalid parameters\n", __func__);
+ return 0;
+ }
+
+ if (index >= opp->opp_table->path_count)
+ return 0;
+
+ if (!opp->bandwidth)
+ return 0;
+
+ return peak ? opp->bandwidth[index].peak : opp->bandwidth[index].avg;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_bw);
+
/**
* dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp
* @opp: opp for which voltage has to be returned for
@@ -499,12 +543,12 @@ static struct dev_pm_opp *_opp_table_find_key(struct opp_table *opp_table,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp,
unsigned long opp_key, unsigned long key),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
/* Assert that the requirement is met */
- if (assert && !assert(opp_table))
+ if (assert && !assert(opp_table, index))
return ERR_PTR(-EINVAL);
mutex_lock(&opp_table->lock);
@@ -532,7 +576,7 @@ _find_key(struct device *dev, unsigned long *key, int index, bool available,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp,
unsigned long opp_key, unsigned long key),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
struct opp_table *opp_table;
struct dev_pm_opp *opp;
@@ -555,7 +599,7 @@ _find_key(struct device *dev, unsigned long *key, int index, bool available,
static struct dev_pm_opp *_find_key_exact(struct device *dev,
unsigned long key, int index, bool available,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
/*
* The value of key will be updated here, but will be ignored as the
@@ -568,7 +612,7 @@ static struct dev_pm_opp *_find_key_exact(struct device *dev,
static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table,
unsigned long *key, int index, bool available,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
return _opp_table_find_key(opp_table, key, index, available, read,
_compare_ceil, assert);
@@ -577,7 +621,7 @@ static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table,
static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key,
int index, bool available,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
return _find_key(dev, key, index, available, read, _compare_ceil,
assert);
@@ -586,7 +630,7 @@ static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key,
static struct dev_pm_opp *_find_key_floor(struct device *dev,
unsigned long *key, int index, bool available,
unsigned long (*read)(struct dev_pm_opp *opp, int index),
- bool (*assert)(struct opp_table *opp_table))
+ bool (*assert)(struct opp_table *opp_table, unsigned int index))
{
return _find_key(dev, key, index, available, read, _compare_floor,
assert);
@@ -647,7 +691,8 @@ struct dev_pm_opp *
dev_pm_opp_find_freq_exact_indexed(struct device *dev, unsigned long freq,
u32 index, bool available)
{
- return _find_key_exact(dev, freq, index, available, _read_freq, NULL);
+ return _find_key_exact(dev, freq, index, available, _read_freq,
+ assert_clk_index);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact_indexed);
@@ -707,7 +752,8 @@ struct dev_pm_opp *
dev_pm_opp_find_freq_ceil_indexed(struct device *dev, unsigned long *freq,
u32 index)
{
- return _find_key_ceil(dev, freq, index, true, _read_freq, NULL);
+ return _find_key_ceil(dev, freq, index, true, _read_freq,
+ assert_clk_index);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_indexed);
@@ -760,7 +806,7 @@ struct dev_pm_opp *
dev_pm_opp_find_freq_floor_indexed(struct device *dev, unsigned long *freq,
u32 index)
{
- return _find_key_floor(dev, freq, index, true, _read_freq, NULL);
+ return _find_key_floor(dev, freq, index, true, _read_freq, assert_clk_index);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor_indexed);
@@ -878,7 +924,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw,
unsigned long temp = *bw;
struct dev_pm_opp *opp;
- opp = _find_key_ceil(dev, &temp, index, true, _read_bw, NULL);
+ opp = _find_key_ceil(dev, &temp, index, true, _read_bw,
+ assert_bandwidth_index);
*bw = temp;
return opp;
}
@@ -909,7 +956,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
unsigned long temp = *bw;
struct dev_pm_opp *opp;
- opp = _find_key_floor(dev, &temp, index, true, _read_bw, NULL);
+ opp = _find_key_floor(dev, &temp, index, true, _read_bw,
+ assert_bandwidth_index);
*bw = temp;
return opp;
}
@@ -1061,6 +1109,27 @@ static int _set_opp_bw(const struct opp_table *opp_table,
return 0;
}
+static int _set_opp_level(struct device *dev, struct dev_pm_opp *opp)
+{
+ unsigned int level = 0;
+ int ret = 0;
+
+ if (opp) {
+ if (opp->level == OPP_LEVEL_UNSET)
+ return 0;
+
+ level = opp->level;
+ }
+
+ /* Request a new performance state through the device's PM domain. */
+ ret = dev_pm_domain_set_performance_state(dev, level);
+ if (ret)
+ dev_err(dev, "Failed to set performance state %u (%d)\n", level,
+ ret);
+
+ return ret;
+}
+
/* This is only called for PM domain for now */
static int _set_required_opps(struct device *dev, struct opp_table *opp_table,
struct dev_pm_opp *opp, bool up)
@@ -1091,7 +1160,7 @@ static int _set_required_opps(struct device *dev, struct opp_table *opp_table,
if (devs[index]) {
required_opp = opp ? opp->required_opps[index] : NULL;
- ret = dev_pm_opp_set_opp(devs[index], required_opp);
+ ret = _set_opp_level(devs[index], required_opp);
if (ret)
return ret;
}
@@ -1102,28 +1171,6 @@ static int _set_required_opps(struct device *dev, struct opp_table *opp_table,
return 0;
}
-static int _set_opp_level(struct device *dev, struct opp_table *opp_table,
- struct dev_pm_opp *opp)
-{
- unsigned int level = 0;
- int ret = 0;
-
- if (opp) {
- if (opp->level == OPP_LEVEL_UNSET)
- return 0;
-
- level = opp->level;
- }
-
- /* Request a new performance state through the device's PM domain. */
- ret = dev_pm_domain_set_performance_state(dev, level);
- if (ret)
- dev_err(dev, "Failed to set performance state %u (%d)\n", level,
- ret);
-
- return ret;
-}
-
static void _find_current_opp(struct device *dev, struct opp_table *opp_table)
{
struct dev_pm_opp *opp = ERR_PTR(-ENODEV);
@@ -1171,7 +1218,7 @@ static int _disable_opp_table(struct device *dev, struct opp_table *opp_table)
if (opp_table->regulators)
regulator_disable(opp_table->regulators[0]);
- ret = _set_opp_level(dev, opp_table, NULL);
+ ret = _set_opp_level(dev, NULL);
if (ret)
goto out;
@@ -1220,7 +1267,7 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
return ret;
}
- ret = _set_opp_level(dev, opp_table, opp);
+ ret = _set_opp_level(dev, opp);
if (ret)
return ret;
@@ -1267,7 +1314,7 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
return ret;
}
- ret = _set_opp_level(dev, opp_table, opp);
+ ret = _set_opp_level(dev, opp);
if (ret)
return ret;
@@ -1481,11 +1528,6 @@ err:
return ERR_PTR(ret);
}
-void _get_opp_table_kref(struct opp_table *opp_table)
-{
- kref_get(&opp_table->kref);
-}
-
static struct opp_table *_update_opp_table_clk(struct device *dev,
struct opp_table *opp_table,
bool getclk)
@@ -1646,6 +1688,17 @@ static void _opp_table_kref_release(struct kref *kref)
kfree(opp_table);
}
+void _get_opp_table_kref(struct opp_table *opp_table)
+{
+ kref_get(&opp_table->kref);
+}
+
+void dev_pm_opp_get_opp_table_ref(struct opp_table *opp_table)
+{
+ _get_opp_table_kref(opp_table);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table_ref);
+
void dev_pm_opp_put_opp_table(struct opp_table *opp_table)
{
kref_put_mutex(&opp_table->kref, _opp_table_kref_release,
@@ -1680,6 +1733,7 @@ void dev_pm_opp_get(struct dev_pm_opp *opp)
{
kref_get(&opp->kref);
}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get);
void dev_pm_opp_put(struct dev_pm_opp *opp)
{
@@ -1703,7 +1757,7 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq)
if (IS_ERR(opp_table))
return;
- if (!assert_single_clk(opp_table))
+ if (!assert_single_clk(opp_table, 0))
goto put_table;
mutex_lock(&opp_table->lock);
@@ -2055,7 +2109,7 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
unsigned long tol, u_volt = data->u_volt;
int ret;
- if (!assert_single_clk(opp_table))
+ if (!assert_single_clk(opp_table, 0))
return -EINVAL;
new_opp = _opp_allocate(opp_table);
@@ -2065,6 +2119,7 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
/* populate the opp table */
new_opp->rates[0] = data->freq;
new_opp->level = data->level;
+ new_opp->turbo = data->turbo;
tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
new_opp->supplies[0].u_volt = u_volt;
new_opp->supplies[0].u_volt_min = u_volt - tol;
@@ -2360,47 +2415,13 @@ static void _opp_put_config_regulators_helper(struct opp_table *opp_table)
opp_table->config_regulators = NULL;
}
-static void _opp_detach_genpd(struct opp_table *opp_table)
-{
- int index;
-
- for (index = 0; index < opp_table->required_opp_count; index++) {
- if (!opp_table->required_devs[index])
- continue;
-
- dev_pm_domain_detach(opp_table->required_devs[index], false);
- opp_table->required_devs[index] = NULL;
- }
-}
-
-/*
- * Multiple generic power domains for a device are supported with the help of
- * virtual genpd devices, which are created for each consumer device - genpd
- * pair. These are the device structures which are attached to the power domain
- * and are required by the OPP core to set the performance state of the genpd.
- * The same API also works for the case where single genpd is available and so
- * we don't need to support that separately.
- *
- * This helper will normally be called by the consumer driver of the device
- * "dev", as only that has details of the genpd names.
- *
- * This helper needs to be called once with a list of all genpd to attach.
- * Otherwise the original device structure will be used instead by the OPP core.
- *
- * The order of entries in the names array must match the order in which
- * "required-opps" are added in DT.
- */
-static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
- const char * const *names, struct device ***virt_devs)
+static int _opp_set_required_dev(struct opp_table *opp_table,
+ struct device *dev,
+ struct device *required_dev,
+ unsigned int index)
{
- struct device *virt_dev;
- int index = 0, ret = -EINVAL;
- const char * const *name = names;
-
- if (!opp_table->required_devs) {
- dev_err(dev, "Required OPPs not available, can't attach genpd\n");
- return -EINVAL;
- }
+ struct opp_table *required_table, *pd_table;
+ struct device *gdev;
/* Genpd core takes care of propagation to parent genpd */
if (opp_table->is_genpd) {
@@ -2408,96 +2429,59 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
return -EOPNOTSUPP;
}
- /* Checking only the first one is enough ? */
- if (opp_table->required_devs[0])
- return 0;
-
- while (*name) {
- if (index >= opp_table->required_opp_count) {
- dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n",
- *name, opp_table->required_opp_count, index);
- goto err;
- }
-
- virt_dev = dev_pm_domain_attach_by_name(dev, *name);
- if (IS_ERR_OR_NULL(virt_dev)) {
- ret = virt_dev ? PTR_ERR(virt_dev) : -ENODEV;
- dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret);
- goto err;
- }
-
- /*
- * Add the virtual genpd device as a user of the OPP table, so
- * we can call dev_pm_opp_set_opp() on it directly.
- *
- * This will be automatically removed when the OPP table is
- * removed, don't need to handle that here.
- */
- if (!_add_opp_dev(virt_dev, opp_table->required_opp_tables[index])) {
- ret = -ENOMEM;
- goto err;
- }
-
- opp_table->required_devs[index] = virt_dev;
- index++;
- name++;
- }
-
- if (virt_devs)
- *virt_devs = opp_table->required_devs;
-
- return 0;
-
-err:
- _opp_detach_genpd(opp_table);
- return ret;
-
-}
-
-static int _opp_set_required_devs(struct opp_table *opp_table,
- struct device *dev,
- struct device **required_devs)
-{
- int i;
-
- if (!opp_table->required_devs) {
+ if (index >= opp_table->required_opp_count) {
dev_err(dev, "Required OPPs not available, can't set required devs\n");
return -EINVAL;
}
- /* Another device that shares the OPP table has set the required devs ? */
- if (opp_table->required_devs[0])
- return 0;
+ required_table = opp_table->required_opp_tables[index];
+ if (IS_ERR(required_table)) {
+ dev_err(dev, "Missing OPP table, unable to set the required devs\n");
+ return -ENODEV;
+ }
- for (i = 0; i < opp_table->required_opp_count; i++) {
- /* Genpd core takes care of propagation to parent genpd */
- if (required_devs[i] && opp_table->is_genpd &&
- opp_table->required_opp_tables[i]->is_genpd) {
- dev_err(dev, "%s: Operation not supported for genpds\n", __func__);
- return -EOPNOTSUPP;
+ /*
+ * The required_opp_tables parsing is not perfect, as the OPP core does
+ * the parsing solely based on the DT node pointers. The core sets the
+ * required_opp_tables entry to the first OPP table in the "opp_tables"
+ * list, that matches with the node pointer.
+ *
+ * If the target DT OPP table is used by multiple devices and they all
+ * create separate instances of 'struct opp_table' from it, then it is
+ * possible that the required_opp_tables entry may be set to the
+ * incorrect sibling device.
+ *
+ * Cross check it again and fix if required.
+ */
+ gdev = dev_to_genpd_dev(required_dev);
+ if (IS_ERR(gdev))
+ return PTR_ERR(gdev);
+
+ pd_table = _find_opp_table(gdev);
+ if (!IS_ERR(pd_table)) {
+ if (pd_table != required_table) {
+ dev_pm_opp_put_opp_table(required_table);
+ opp_table->required_opp_tables[index] = pd_table;
+ } else {
+ dev_pm_opp_put_opp_table(pd_table);
}
-
- opp_table->required_devs[i] = required_devs[i];
}
+ opp_table->required_devs[index] = required_dev;
return 0;
}
-static void _opp_put_required_devs(struct opp_table *opp_table)
+static void _opp_put_required_dev(struct opp_table *opp_table,
+ unsigned int index)
{
- int i;
-
- for (i = 0; i < opp_table->required_opp_count; i++)
- opp_table->required_devs[i] = NULL;
+ opp_table->required_devs[index] = NULL;
}
static void _opp_clear_config(struct opp_config_data *data)
{
- if (data->flags & OPP_CONFIG_REQUIRED_DEVS)
- _opp_put_required_devs(data->opp_table);
- else if (data->flags & OPP_CONFIG_GENPD)
- _opp_detach_genpd(data->opp_table);
-
+ if (data->flags & OPP_CONFIG_REQUIRED_DEV)
+ _opp_put_required_dev(data->opp_table,
+ data->required_dev_index);
if (data->flags & OPP_CONFIG_REGULATOR)
_opp_put_regulators(data->opp_table);
if (data->flags & OPP_CONFIG_SUPPORTED_HW)
@@ -2609,24 +2593,15 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
data->flags |= OPP_CONFIG_REGULATOR;
}
- /* Attach genpds */
- if (config->genpd_names) {
- if (config->required_devs)
- goto err;
-
- ret = _opp_attach_genpd(opp_table, dev, config->genpd_names,
- config->virt_devs);
- if (ret)
- goto err;
-
- data->flags |= OPP_CONFIG_GENPD;
- } else if (config->required_devs) {
- ret = _opp_set_required_devs(opp_table, dev,
- config->required_devs);
+ if (config->required_dev) {
+ ret = _opp_set_required_dev(opp_table, dev,
+ config->required_dev,
+ config->required_dev_index);
if (ret)
goto err;
- data->flags |= OPP_CONFIG_REQUIRED_DEVS;
+ data->required_dev_index = config->required_dev_index;
+ data->flags |= OPP_CONFIG_REQUIRED_DEV;
}
ret = xa_alloc(&opp_configs, &id, data, XA_LIMIT(1, INT_MAX),
@@ -2890,7 +2865,7 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
return r;
}
- if (!assert_single_clk(opp_table)) {
+ if (!assert_single_clk(opp_table, 0)) {
r = -EINVAL;
goto put_table;
}
@@ -2966,7 +2941,7 @@ int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
return r;
}
- if (!assert_single_clk(opp_table)) {
+ if (!assert_single_clk(opp_table, 0)) {
r = -EINVAL;
goto put_table;
}
diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index ec030b19164a..8fc6238b1728 100644
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -37,10 +37,12 @@ static ssize_t bw_name_read(struct file *fp, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct icc_path *path = fp->private_data;
+ const char *name = icc_get_name(path);
char buf[64];
- int i;
+ int i = 0;
- i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
+ if (name)
+ i = scnprintf(buf, sizeof(buf), "%.62s\n", name);
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
@@ -56,11 +58,11 @@ static void opp_debug_create_bw(struct dev_pm_opp *opp,
struct dentry *pdentry)
{
struct dentry *d;
- char name[20];
+ char name[] = "icc-path-XXXXXXXXXXX"; /* Integers can take 11 chars max */
int i;
for (i = 0; i < opp_table->path_count; i++) {
- snprintf(name, sizeof(name), "icc-path-%.1d", i);
+ snprintf(name, sizeof(name), "icc-path-%d", i);
/* Create per-path directory */
d = debugfs_create_dir(name, pdentry);
@@ -78,7 +80,7 @@ static void opp_debug_create_clks(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
{
- char name[12];
+ char name[] = "rate_hz_XXXXXXXXXXX"; /* Integers can take 11 chars max */
int i;
if (opp_table->clk_count == 1) {
@@ -100,7 +102,7 @@ static void opp_debug_create_supplies(struct dev_pm_opp *opp,
int i;
for (i = 0; i < opp_table->regulator_count; i++) {
- char name[15];
+ char name[] = "supply-XXXXXXXXXXX"; /* Integers can take 11 chars max */
snprintf(name, sizeof(name), "supply-%d", i);
@@ -215,7 +217,7 @@ static void opp_migrate_dentry(struct opp_device *opp_dev,
{
struct opp_device *new_dev = NULL, *iter;
const struct device *dev;
- struct dentry *dentry;
+ int err;
/* Look for next opp-dev */
list_for_each_entry(iter, &opp_table->dev_list, node)
@@ -232,16 +234,14 @@ static void opp_migrate_dentry(struct opp_device *opp_dev,
opp_set_dev_name(dev, opp_table->dentry_name);
- dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,
- opp_table->dentry_name);
- if (IS_ERR(dentry)) {
+ err = debugfs_change_name(opp_dev->dentry, "%s", opp_table->dentry_name);
+ if (err) {
dev_err(dev, "%s: Failed to rename link from: %s to %s\n",
__func__, dev_name(opp_dev->dev), dev_name(dev));
return;
}
- new_dev->dentry = dentry;
- opp_table->dentry = dentry;
+ new_dev->dentry = opp_table->dentry = opp_dev->dentry;
}
/**
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index f9f0b22bccbb..a24f76f5fd01 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -295,7 +295,7 @@ void _of_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp)
of_node_put(opp->np);
}
-static int _link_required_opps(struct dev_pm_opp *opp, struct opp_table *opp_table,
+static int _link_required_opps(struct dev_pm_opp *opp,
struct opp_table *required_table, int index)
{
struct device_node *np;
@@ -313,39 +313,6 @@ static int _link_required_opps(struct dev_pm_opp *opp, struct opp_table *opp_tab
return -ENODEV;
}
- /*
- * There are two genpd (as required-opp) cases that we need to handle,
- * devices with a single genpd and ones with multiple genpds.
- *
- * The single genpd case requires special handling as we need to use the
- * same `dev` structure (instead of a virtual one provided by genpd
- * core) for setting the performance state.
- *
- * It doesn't make sense for a device's DT entry to have both
- * "opp-level" and single "required-opps" entry pointing to a genpd's
- * OPP, as that would make the OPP core call
- * dev_pm_domain_set_performance_state() for two different values for
- * the same device structure. Lets treat single genpd configuration as a
- * case where the OPP's level is directly available without required-opp
- * link in the DT.
- *
- * Just update the `level` with the right value, which
- * dev_pm_opp_set_opp() will take care of in the normal path itself.
- *
- * There is another case though, where a genpd's OPP table has
- * required-opps set to a parent genpd. The OPP core expects the user to
- * set the respective required `struct device` pointer via
- * dev_pm_opp_set_config().
- */
- if (required_table->is_genpd && opp_table->required_opp_count == 1 &&
- !opp_table->required_devs[0]) {
- /* Genpd core takes care of propagation to parent genpd */
- if (!opp_table->is_genpd) {
- if (!WARN_ON(opp->level != OPP_LEVEL_UNSET))
- opp->level = opp->required_opps[0]->level;
- }
- }
-
return 0;
}
@@ -370,7 +337,7 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
if (IS_ERR_OR_NULL(required_table))
continue;
- ret = _link_required_opps(opp, opp_table, required_table, i);
+ ret = _link_required_opps(opp, required_table, i);
if (ret)
goto free_required_opps;
}
@@ -391,7 +358,7 @@ static int lazy_link_required_opps(struct opp_table *opp_table,
int ret;
list_for_each_entry(opp, &opp_table->opp_list, node) {
- ret = _link_required_opps(opp, opp_table, new_table, index);
+ ret = _link_required_opps(opp, new_table, index);
if (ret)
return ret;
}
@@ -959,7 +926,7 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
ret = _of_opp_alloc_required_opps(opp_table, new_opp);
if (ret)
- goto free_opp;
+ goto put_node;
if (!of_property_read_u32(np, "clock-latency-ns", &val))
new_opp->clock_latency_ns = val;
@@ -1009,6 +976,8 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
free_required_opps:
_of_opp_free_required_opps(opp_table, new_opp);
+put_node:
+ of_node_put(np);
free_opp:
_opp_free(new_opp);
@@ -1444,6 +1413,38 @@ put_required_np:
EXPORT_SYMBOL_GPL(of_get_required_opp_performance_state);
/**
+ * dev_pm_opp_of_has_required_opp - Find out if a required-opps exists.
+ * @dev: The device to investigate.
+ *
+ * Returns true if the device's node has a "operating-points-v2" property and if
+ * the corresponding node for the opp-table describes opp nodes that uses the
+ * "required-opps" property.
+ *
+ * Return: True if a required-opps is present, else false.
+ */
+bool dev_pm_opp_of_has_required_opp(struct device *dev)
+{
+ struct device_node *opp_np, *np;
+ int count;
+
+ opp_np = _opp_of_get_opp_desc_node(dev->of_node, 0);
+ if (!opp_np)
+ return false;
+
+ np = of_get_next_available_child(opp_np, NULL);
+ of_node_put(opp_np);
+ if (!np) {
+ dev_warn(dev, "Empty OPP table\n");
+ return false;
+ }
+
+ count = of_count_phandle_with_args(np, "required-opps", NULL);
+ of_node_put(np);
+
+ return count > 0;
+}
+
+/**
* dev_pm_opp_get_of_node() - Gets the DT node corresponding to an opp
* @opp: opp for which DT node has to be returned for
*
@@ -1494,20 +1495,26 @@ _get_dt_power(struct device *dev, unsigned long *uW, unsigned long *kHz)
return 0;
}
-/*
- * Callback function provided to the Energy Model framework upon registration.
+/**
+ * dev_pm_opp_calc_power() - Calculate power value for device with EM
+ * @dev : Device for which an Energy Model has to be registered
+ * @uW : New power value that is calculated
+ * @kHz : Frequency for which the new power is calculated
+ *
* This computes the power estimated by @dev at @kHz if it is the frequency
* of an existing OPP, or at the frequency of the first OPP above @kHz otherwise
* (see dev_pm_opp_find_freq_ceil()). This function updates @kHz to the ceiled
* frequency and @uW to the associated power. The power is estimated as
* P = C * V^2 * f with C being the device's capacitance and V and f
* respectively the voltage and frequency of the OPP.
+ * It is also used as a callback function provided to the Energy Model
+ * framework upon registration.
*
* Returns -EINVAL if the power calculation failed because of missing
* parameters, 0 otherwise.
*/
-static int __maybe_unused _get_power(struct device *dev, unsigned long *uW,
- unsigned long *kHz)
+int dev_pm_opp_calc_power(struct device *dev, unsigned long *uW,
+ unsigned long *kHz)
{
struct dev_pm_opp *opp;
struct device_node *np;
@@ -1544,6 +1551,7 @@ static int __maybe_unused _get_power(struct device *dev, unsigned long *uW,
return 0;
}
+EXPORT_SYMBOL_GPL(dev_pm_opp_calc_power);
static bool _of_has_opp_microwatt_property(struct device *dev)
{
@@ -1619,7 +1627,7 @@ int dev_pm_opp_of_register_em(struct device *dev, struct cpumask *cpus)
goto failed;
}
- EM_SET_ACTIVE_POWER_CB(em_cb, _get_power);
+ EM_SET_ACTIVE_POWER_CB(em_cb, dev_pm_opp_calc_power);
register_em:
ret = em_dev_register_perf_domain(dev, nr_opp, &em_cb, cpus, true);
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index cff1fabd1ae3..5c7c81190e41 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -34,13 +34,13 @@ extern struct list_head opp_tables;
#define OPP_CONFIG_REGULATOR_HELPER BIT(2)
#define OPP_CONFIG_PROP_NAME BIT(3)
#define OPP_CONFIG_SUPPORTED_HW BIT(4)
-#define OPP_CONFIG_GENPD BIT(5)
-#define OPP_CONFIG_REQUIRED_DEVS BIT(6)
+#define OPP_CONFIG_REQUIRED_DEV BIT(5)
/**
* struct opp_config_data - data for set config operations
* @opp_table: OPP table
* @flags: OPP config flags
+ * @required_dev_index: The position in the array of required_devs
*
* This structure stores the OPP config information for each OPP table
* configuration by the callers.
@@ -48,6 +48,7 @@ extern struct list_head opp_tables;
struct opp_config_data {
struct opp_table *opp_table;
unsigned int flags;
+ unsigned int required_dev_index;
};
/**
@@ -249,7 +250,6 @@ struct opp_table {
};
/* Routines internal to opp core */
-void dev_pm_opp_get(struct dev_pm_opp *opp);
bool _opp_remove_all_static(struct opp_table *opp_table);
void _get_opp_table_kref(struct opp_table *opp_table);
int _get_opp_count(struct opp_table *opp_table);
@@ -262,9 +262,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *o
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, struct dev_pm_opp_data *data, bool dynamic);
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, int last_cpu);
struct opp_table *_add_opp_table_indexed(struct device *dev, int index, bool getclk);
-void _put_opp_list_kref(struct opp_table *opp_table);
void _required_opps_available(struct dev_pm_opp *opp, int count);
-void _update_set_required_opps(struct opp_table *opp_table);
static inline bool lazy_linking_pending(struct opp_table *opp_table)
{
diff --git a/drivers/opp/ti-opp-supply.c b/drivers/opp/ti-opp-supply.c
index e3b97cd1fbbf..5f0fb3ea385b 100644
--- a/drivers/opp/ti-opp-supply.c
+++ b/drivers/opp/ti-opp-supply.c
@@ -393,17 +393,19 @@ static int ti_opp_supply_probe(struct platform_device *pdev)
}
ret = dev_pm_opp_set_config_regulators(cpu_dev, ti_opp_config_regulators);
- if (ret < 0)
+ if (ret < 0) {
_free_optimized_voltages(dev, &opp_data);
+ return ret;
+ }
- return ret;
+ return 0;
}
static struct platform_driver ti_opp_supply_driver = {
.probe = ti_opp_supply_probe,
.driver = {
.name = "ti_opp_supply",
- .of_match_table = of_match_ptr(ti_opp_supply_of_match),
+ .of_match_table = ti_opp_supply_of_match,
},
};
module_platform_driver(ti_opp_supply_driver);
generated by cgit (git 2.34.1) at 2025-07-31 13:41:35 +0000