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-rw-r--r--drivers/opp/core.c236
-rw-r--r--drivers/opp/debugfs.c2
-rw-r--r--drivers/opp/of.c74
-rw-r--r--drivers/opp/opp.h4
4 files changed, 141 insertions, 175 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index bceb27b1ba..f1e54a3a15 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -814,6 +814,36 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
/**
+ * dev_pm_opp_find_level_floor() - Search for a rounded floor level
+ * @dev: device for which we do this operation
+ * @level: Start level
+ *
+ * Search for the matching floor *available* OPP from a starting level
+ * for a device.
+ *
+ * Return: matching *opp and refreshes *level accordingly, else returns
+ * ERR_PTR in case of error and should be handled using IS_ERR. Error return
+ * values can be:
+ * EINVAL: for bad pointer
+ * ERANGE: no match found for search
+ * ENODEV: if device not found in list of registered devices
+ *
+ * The callers are required to call dev_pm_opp_put() for the returned OPP after
+ * use.
+ */
+struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
+ unsigned int *level)
+{
+ unsigned long temp = *level;
+ struct dev_pm_opp *opp;
+
+ opp = _find_key_floor(dev, &temp, 0, true, _read_level, NULL);
+ *level = temp;
+ return opp;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor);
+
+/**
* dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth
* @dev: device for which we do this operation
* @bw: start bandwidth
@@ -1030,7 +1060,7 @@ static int _set_performance_state(struct device *dev, struct device *pd_dev,
if (!pd_dev)
return 0;
- ret = dev_pm_genpd_set_performance_state(pd_dev, pstate);
+ ret = dev_pm_domain_set_performance_state(pd_dev, pstate);
if (ret) {
dev_err(dev, "Failed to set performance state of %s: %d (%d)\n",
dev_name(pd_dev), pstate, ret);
@@ -1051,32 +1081,28 @@ static int _opp_set_required_opps_genpd(struct device *dev,
{
struct device **genpd_virt_devs =
opp_table->genpd_virt_devs ? opp_table->genpd_virt_devs : &dev;
- int i, ret = 0;
-
- /*
- * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev
- * after it is freed from another thread.
- */
- mutex_lock(&opp_table->genpd_virt_dev_lock);
+ int index, target, delta, ret;
/* Scaling up? Set required OPPs in normal order, else reverse */
if (!scaling_down) {
- for (i = 0; i < opp_table->required_opp_count; i++) {
- ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
- if (ret)
- break;
- }
+ index = 0;
+ target = opp_table->required_opp_count;
+ delta = 1;
} else {
- for (i = opp_table->required_opp_count - 1; i >= 0; i--) {
- ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
- if (ret)
- break;
- }
+ index = opp_table->required_opp_count - 1;
+ target = -1;
+ delta = -1;
}
- mutex_unlock(&opp_table->genpd_virt_dev_lock);
+ while (index != target) {
+ ret = _set_performance_state(dev, genpd_virt_devs[index], opp, index);
+ if (ret)
+ return ret;
- return ret;
+ index += delta;
+ }
+
+ return 0;
}
/* This is only called for PM domain for now */
@@ -1107,6 +1133,28 @@ void _update_set_required_opps(struct opp_table *opp_table)
opp_table->set_required_opps = _opp_set_required_opps_generic;
}
+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)
+ 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);
@@ -1154,8 +1202,13 @@ 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);
+ if (ret)
+ goto out;
+
ret = _set_required_opps(dev, opp_table, NULL, false);
+out:
opp_table->enabled = false;
return ret;
}
@@ -1198,6 +1251,10 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
return ret;
}
+ ret = _set_opp_level(dev, opp_table, opp);
+ if (ret)
+ return ret;
+
ret = _set_opp_bw(opp_table, opp, dev);
if (ret) {
dev_err(dev, "Failed to set bw: %d\n", ret);
@@ -1241,6 +1298,10 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
return ret;
}
+ ret = _set_opp_level(dev, opp_table, opp);
+ if (ret)
+ return ret;
+
ret = _set_required_opps(dev, opp_table, opp, false);
if (ret) {
dev_err(dev, "Failed to set required opps: %d\n", ret);
@@ -1410,7 +1471,6 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
return ERR_PTR(-ENOMEM);
mutex_init(&opp_table->lock);
- mutex_init(&opp_table->genpd_virt_dev_lock);
INIT_LIST_HEAD(&opp_table->dev_list);
INIT_LIST_HEAD(&opp_table->lazy);
@@ -1446,7 +1506,6 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
remove_opp_dev:
_of_clear_opp_table(opp_table);
_remove_opp_dev(opp_dev, opp_table);
- mutex_destroy(&opp_table->genpd_virt_dev_lock);
mutex_destroy(&opp_table->lock);
err:
kfree(opp_table);
@@ -1614,7 +1673,6 @@ static void _opp_table_kref_release(struct kref *kref)
list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node)
_remove_opp_dev(opp_dev, opp_table);
- mutex_destroy(&opp_table->genpd_virt_dev_lock);
mutex_destroy(&opp_table->lock);
kfree(opp_table);
}
@@ -2002,8 +2060,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
* _opp_add_v1() - Allocate a OPP based on v1 bindings.
* @opp_table: OPP table
* @dev: device for which we do this operation
- * @freq: Frequency in Hz for this OPP
- * @u_volt: Voltage in uVolts for this OPP
+ * @data: The OPP data for the OPP to add
* @dynamic: Dynamically added OPPs.
*
* This function adds an opp definition to the opp table and returns status.
@@ -2021,10 +2078,10 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
* -ENOMEM Memory allocation failure
*/
int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
- unsigned long freq, long u_volt, bool dynamic)
+ struct dev_pm_opp_data *data, bool dynamic)
{
struct dev_pm_opp *new_opp;
- unsigned long tol;
+ unsigned long tol, u_volt = data->u_volt;
int ret;
if (!assert_single_clk(opp_table))
@@ -2035,7 +2092,8 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
return -ENOMEM;
/* populate the opp table */
- new_opp->rates[0] = freq;
+ new_opp->rates[0] = data->freq;
+ new_opp->level = data->level;
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;
@@ -2064,12 +2122,7 @@ free_opp:
return ret;
}
-/**
- * _opp_set_supported_hw() - Set supported platforms
- * @dev: Device for which supported-hw has to be set.
- * @versions: Array of hierarchy of versions to match.
- * @count: Number of elements in the array.
- *
+/*
* This is required only for the V2 bindings, and it enables a platform to
* specify the hierarchy of versions it supports. OPP layer will then enable
* OPPs, which are available for those versions, based on its 'opp-supported-hw'
@@ -2092,14 +2145,6 @@ static int _opp_set_supported_hw(struct opp_table *opp_table,
return 0;
}
-/**
- * _opp_put_supported_hw() - Releases resources blocked for supported hw
- * @opp_table: OPP table returned by _opp_set_supported_hw().
- *
- * This is required only for the V2 bindings, and is called for a matching
- * _opp_set_supported_hw(). Until this is called, the opp_table structure
- * will not be freed.
- */
static void _opp_put_supported_hw(struct opp_table *opp_table)
{
if (opp_table->supported_hw) {
@@ -2109,11 +2154,7 @@ static void _opp_put_supported_hw(struct opp_table *opp_table)
}
}
-/**
- * _opp_set_prop_name() - Set prop-extn name
- * @dev: Device for which the prop-name has to be set.
- * @name: name to postfix to properties.
- *
+/*
* This is required only for the V2 bindings, and it enables a platform to
* specify the extn to be used for certain property names. The properties to
* which the extension will apply are opp-microvolt and opp-microamp. OPP core
@@ -2131,14 +2172,6 @@ static int _opp_set_prop_name(struct opp_table *opp_table, const char *name)
return 0;
}
-/**
- * _opp_put_prop_name() - Releases resources blocked for prop-name
- * @opp_table: OPP table returned by _opp_set_prop_name().
- *
- * This is required only for the V2 bindings, and is called for a matching
- * _opp_set_prop_name(). Until this is called, the opp_table structure
- * will not be freed.
- */
static void _opp_put_prop_name(struct opp_table *opp_table)
{
if (opp_table->prop_name) {
@@ -2147,12 +2180,7 @@ static void _opp_put_prop_name(struct opp_table *opp_table)
}
}
-/**
- * _opp_set_regulators() - Set regulator names for the device
- * @dev: Device for which regulator name is being set.
- * @names: Array of pointers to the names of the regulator.
- * @count: Number of regulators.
- *
+/*
* In order to support OPP switching, OPP layer needs to know the name of the
* device's regulators, as the core would be required to switch voltages as
* well.
@@ -2214,10 +2242,6 @@ free_regulators:
return ret;
}
-/**
- * _opp_put_regulators() - Releases resources blocked for regulator
- * @opp_table: OPP table returned from _opp_set_regulators().
- */
static void _opp_put_regulators(struct opp_table *opp_table)
{
int i;
@@ -2249,11 +2273,7 @@ static void _put_clks(struct opp_table *opp_table, int count)
opp_table->clks = NULL;
}
-/**
- * _opp_set_clknames() - Set clk names for the device
- * @dev: Device for which clk names is being set.
- * @names: Clk names.
- *
+/*
* In order to support OPP switching, OPP layer needs to get pointers to the
* clocks for the device. Simple cases work fine without using this routine
* (i.e. by passing connection-id as NULL), but for a device with multiple
@@ -2337,10 +2357,6 @@ free_clks:
return ret;
}
-/**
- * _opp_put_clknames() - Releases resources blocked for clks.
- * @opp_table: OPP table returned from _opp_set_clknames().
- */
static void _opp_put_clknames(struct opp_table *opp_table)
{
if (!opp_table->clks)
@@ -2352,11 +2368,7 @@ static void _opp_put_clknames(struct opp_table *opp_table)
_put_clks(opp_table, opp_table->clk_count);
}
-/**
- * _opp_set_config_regulators_helper() - Register custom set regulator helper.
- * @dev: Device for which the helper is getting registered.
- * @config_regulators: Custom set regulator helper.
- *
+/*
* This is useful to support platforms with multiple regulators per device.
*
* This must be called before any OPPs are initialized for the device.
@@ -2371,20 +2383,13 @@ static int _opp_set_config_regulators_helper(struct opp_table *opp_table,
return 0;
}
-/**
- * _opp_put_config_regulators_helper() - Releases resources blocked for
- * config_regulators helper.
- * @opp_table: OPP table returned from _opp_set_config_regulators_helper().
- *
- * Release resources blocked for platform specific config_regulators helper.
- */
static void _opp_put_config_regulators_helper(struct opp_table *opp_table)
{
if (opp_table->config_regulators)
opp_table->config_regulators = NULL;
}
-static void _detach_genpd(struct opp_table *opp_table)
+static void _opp_detach_genpd(struct opp_table *opp_table)
{
int index;
@@ -2403,12 +2408,7 @@ static void _detach_genpd(struct opp_table *opp_table)
opp_table->genpd_virt_devs = NULL;
}
-/**
- * _opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer
- * @dev: Consumer device for which the genpd is getting attached.
- * @names: Null terminated array of pointers containing names of genpd to attach.
- * @virt_devs: Pointer to return the array of virtual devices.
- *
+/*
* 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
@@ -2435,21 +2435,11 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
if (opp_table->genpd_virt_devs)
return 0;
- /*
- * If the genpd's OPP table isn't already initialized, parsing of the
- * required-opps fail for dev. We should retry this after genpd's OPP
- * table is added.
- */
- if (!opp_table->required_opp_count)
- return -EPROBE_DEFER;
-
- mutex_lock(&opp_table->genpd_virt_dev_lock);
-
opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
sizeof(*opp_table->genpd_virt_devs),
GFP_KERNEL);
if (!opp_table->genpd_virt_devs)
- goto unlock;
+ return -ENOMEM;
while (*name) {
if (index >= opp_table->required_opp_count) {
@@ -2472,36 +2462,15 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
if (virt_devs)
*virt_devs = opp_table->genpd_virt_devs;
- mutex_unlock(&opp_table->genpd_virt_dev_lock);
return 0;
err:
- _detach_genpd(opp_table);
-unlock:
- mutex_unlock(&opp_table->genpd_virt_dev_lock);
+ _opp_detach_genpd(opp_table);
return ret;
}
-/**
- * _opp_detach_genpd() - Detach genpd(s) from the device.
- * @opp_table: OPP table returned by _opp_attach_genpd().
- *
- * This detaches the genpd(s), resets the virtual device pointers, and puts the
- * OPP table.
- */
-static void _opp_detach_genpd(struct opp_table *opp_table)
-{
- /*
- * Acquire genpd_virt_dev_lock to make sure virt_dev isn't getting
- * used in parallel.
- */
- mutex_lock(&opp_table->genpd_virt_dev_lock);
- _detach_genpd(opp_table);
- mutex_unlock(&opp_table->genpd_virt_dev_lock);
-}
-
static void _opp_clear_config(struct opp_config_data *data)
{
if (data->flags & OPP_CONFIG_GENPD)
@@ -2642,7 +2611,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_config);
/**
* dev_pm_opp_clear_config() - Releases resources blocked for OPP configuration.
- * @opp_table: OPP table returned from dev_pm_opp_set_config().
+ * @token: The token returned by dev_pm_opp_set_config() previously.
*
* This allows all device OPP configurations to be cleared at once. This must be
* called once for each call made to dev_pm_opp_set_config(), in order to free
@@ -2825,10 +2794,9 @@ unlock:
}
/**
- * dev_pm_opp_add() - Add an OPP table from a table definitions
- * @dev: device for which we do this operation
- * @freq: Frequency in Hz for this OPP
- * @u_volt: Voltage in uVolts for this OPP
+ * dev_pm_opp_add_dynamic() - Add an OPP table from a table definitions
+ * @dev: The device for which we do this operation
+ * @data: The OPP data for the OPP to add
*
* This function adds an opp definition to the opp table and returns status.
* The opp is made available by default and it can be controlled using
@@ -2841,7 +2809,7 @@ unlock:
* Duplicate OPPs (both freq and volt are same) and !opp->available
* -ENOMEM Memory allocation failure
*/
-int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
+int dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *data)
{
struct opp_table *opp_table;
int ret;
@@ -2853,13 +2821,13 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
/* Fix regulator count for dynamic OPPs */
opp_table->regulator_count = 1;
- ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
+ ret = _opp_add_v1(opp_table, dev, data, true);
if (ret)
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_add);
+EXPORT_SYMBOL_GPL(dev_pm_opp_add_dynamic);
/**
* _opp_set_availability() - helper to set the availability of an opp
diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index 17543c0aa5..ec030b1916 100644
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -56,7 +56,7 @@ static void opp_debug_create_bw(struct dev_pm_opp *opp,
struct dentry *pdentry)
{
struct dentry *d;
- char name[11];
+ char name[20];
int i;
for (i = 0; i < opp_table->path_count; i++) {
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index ada4963c7c..81fa27599d 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -208,9 +208,9 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
mutex_lock(&opp_table_lock);
list_add(&opp_table->lazy, &lazy_opp_tables);
mutex_unlock(&opp_table_lock);
- }
- else
+ } else {
_update_set_required_opps(opp_table);
+ }
goto put_np;
@@ -296,24 +296,41 @@ 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 *required_table, int index)
+{
+ struct device_node *np;
+
+ np = of_parse_required_opp(opp->np, index);
+ if (unlikely(!np))
+ return -ENODEV;
+
+ opp->required_opps[index] = _find_opp_of_np(required_table, np);
+ of_node_put(np);
+
+ if (!opp->required_opps[index]) {
+ pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
+ __func__, opp->np, index);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
/* Populate all required OPPs which are part of "required-opps" list */
static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
struct dev_pm_opp *opp)
{
- struct dev_pm_opp **required_opps;
struct opp_table *required_table;
- struct device_node *np;
int i, ret, count = opp_table->required_opp_count;
if (!count)
return 0;
- required_opps = kcalloc(count, sizeof(*required_opps), GFP_KERNEL);
- if (!required_opps)
+ opp->required_opps = kcalloc(count, sizeof(*opp->required_opps), GFP_KERNEL);
+ if (!opp->required_opps)
return -ENOMEM;
- opp->required_opps = required_opps;
-
for (i = 0; i < count; i++) {
required_table = opp_table->required_opp_tables[i];
@@ -321,21 +338,9 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
if (IS_ERR_OR_NULL(required_table))
continue;
- np = of_parse_required_opp(opp->np, i);
- if (unlikely(!np)) {
- ret = -ENODEV;
- goto free_required_opps;
- }
-
- required_opps[i] = _find_opp_of_np(required_table, np);
- of_node_put(np);
-
- if (!required_opps[i]) {
- pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
- __func__, opp->np, i);
- ret = -ENODEV;
+ ret = _link_required_opps(opp, required_table, i);
+ if (ret)
goto free_required_opps;
- }
}
return 0;
@@ -350,22 +355,13 @@ free_required_opps:
static int lazy_link_required_opps(struct opp_table *opp_table,
struct opp_table *new_table, int index)
{
- struct device_node *required_np;
struct dev_pm_opp *opp;
+ int ret;
list_for_each_entry(opp, &opp_table->opp_list, node) {
- required_np = of_parse_required_opp(opp->np, index);
- if (unlikely(!required_np))
- return -ENODEV;
-
- opp->required_opps[index] = _find_opp_of_np(new_table, required_np);
- of_node_put(required_np);
-
- if (!opp->required_opps[index]) {
- pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
- __func__, opp->np, index);
- return -ENODEV;
- }
+ ret = _link_required_opps(opp, new_table, index);
+ if (ret)
+ return ret;
}
return 0;
@@ -1079,11 +1075,15 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
while (nr) {
unsigned long freq = be32_to_cpup(val++) * 1000;
unsigned long volt = be32_to_cpup(val++);
+ struct dev_pm_opp_data data = {
+ .freq = freq,
+ .u_volt = volt,
+ };
- ret = _opp_add_v1(opp_table, dev, freq, volt, false);
+ ret = _opp_add_v1(opp_table, dev, &data, false);
if (ret) {
dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
- __func__, freq, ret);
+ __func__, data.freq, ret);
goto remove_static_opp;
}
nr -= 2;
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index 8a5ea38f3a..08366f90f1 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -160,7 +160,6 @@ enum opp_table_access {
* @rate_clk_single: Currently configured frequency for single clk.
* @current_opp: Currently configured OPP for the table.
* @suspend_opp: Pointer to OPP to be used during device suspend.
- * @genpd_virt_dev_lock: Mutex protecting the genpd virtual device pointers.
* @genpd_virt_devs: List of virtual devices for multiple genpd support.
* @required_opp_tables: List of device OPP tables that are required by OPPs in
* this table.
@@ -212,7 +211,6 @@ struct opp_table {
struct dev_pm_opp *current_opp;
struct dev_pm_opp *suspend_opp;
- struct mutex genpd_virt_dev_lock;
struct device **genpd_virt_devs;
struct opp_table **required_opp_tables;
unsigned int required_opp_count;
@@ -251,7 +249,7 @@ struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);
void _opp_free(struct dev_pm_opp *opp);
int _opp_compare_key(struct opp_table *opp_table, struct dev_pm_opp *opp1, struct dev_pm_opp *opp2);
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
-int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
+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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 18:45:55 +0000