Merge branch 'pm-opp'
* pm-opp: PM / OPP: Don't WARN on multiple calls to dev_pm_opp_set_regulators() PM / OPP: Allow platform specific custom set_opp() callbacks PM / OPP: Separate out _generic_set_opp() PM / OPP: Add infrastructure to manage multiple regulators PM / OPP: Pass struct dev_pm_opp_supply to _set_opp_voltage() PM / OPP: Manage supply's voltage/current in a separate structure PM / OPP: Don't use OPP structure outside of rcu protected section PM / OPP: Reword binding supporting multiple regulators per device PM / OPP: Fix incorrect cpu-supply property in binding PM / OPP: Pass opp_table to dev_pm_opp_put_regulator() PM / OPP: fix debug/error messages in dev_pm_opp_of_get_sharing_cpus() PM / OPP: make _of_get_opp_desc_node() a static function
This commit is contained in:
Rafael J. Wysocki
commit
57def856f3
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@ -86,8 +86,14 @@ Optional properties:
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Single entry is for target voltage and three entries are for <target min max>
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voltages.
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Entries for multiple regulators must be present in the same order as
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regulators are specified in device's DT node.
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Entries for multiple regulators shall be provided in the same field separated
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by angular brackets <>. The OPP binding doesn't provide any provisions to
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relate the values to their power supplies or the order in which the supplies
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need to be configured and that is left for the implementation specific
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binding.
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Entries for all regulators shall be of the same size, i.e. either all use a
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single value or triplets.
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- opp-microvolt-<name>: Named opp-microvolt property. This is exactly similar to
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the above opp-microvolt property, but allows multiple voltage ranges to be
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@ -104,10 +110,13 @@ Optional properties:
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Should only be set if opp-microvolt is set for the OPP.
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Entries for multiple regulators must be present in the same order as
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regulators are specified in device's DT node. If this property isn't required
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for few regulators, then this should be marked as zero for them. If it isn't
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required for any regulator, then this property need not be present.
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Entries for multiple regulators shall be provided in the same field separated
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by angular brackets <>. If current values aren't required for a regulator,
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then it shall be filled with 0. If current values aren't required for any of
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the regulators, then this field is not required. The OPP binding doesn't
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provide any provisions to relate the values to their power supplies or the
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order in which the supplies need to be configured and that is left for the
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implementation specific binding.
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- opp-microamp-<name>: Named opp-microamp property. Similar to
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opp-microvolt-<name> property, but for microamp instead.
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@ -386,10 +395,12 @@ Example 4: Handling multiple regulators
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/ {
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cpus {
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cpu@0 {
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compatible = "arm,cortex-a7";
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compatible = "vendor,cpu-type";
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...
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cpu-supply = <&cpu_supply0>, <&cpu_supply1>, <&cpu_supply2>;
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vcc0-supply = <&cpu_supply0>;
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vcc1-supply = <&cpu_supply1>;
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vcc2-supply = <&cpu_supply2>;
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operating-points-v2 = <&cpu0_opp_table>;
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};
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};
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@ -93,6 +93,8 @@ struct opp_table *_find_opp_table(struct device *dev)
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* Return: voltage in micro volt corresponding to the opp, else
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* return 0
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*
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* This is useful only for devices with single power supply.
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*
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* Locking: This function must be called under rcu_read_lock(). opp is a rcu
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* protected pointer. This means that opp which could have been fetched by
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* opp_find_freq_{exact,ceil,floor} functions is valid as long as we are
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@ -112,7 +114,7 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
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if (IS_ERR_OR_NULL(tmp_opp))
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pr_err("%s: Invalid parameters\n", __func__);
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else
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v = tmp_opp->u_volt;
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v = tmp_opp->supplies[0].u_volt;
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return v;
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}
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@ -210,6 +212,24 @@ unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
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static int _get_regulator_count(struct device *dev)
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{
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struct opp_table *opp_table;
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int count;
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rcu_read_lock();
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opp_table = _find_opp_table(dev);
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if (!IS_ERR(opp_table))
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count = opp_table->regulator_count;
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else
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count = 0;
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rcu_read_unlock();
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return count;
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}
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/**
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* dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds
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* @dev: device for which we do this operation
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@ -222,34 +242,51 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
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{
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struct opp_table *opp_table;
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struct dev_pm_opp *opp;
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struct regulator *reg;
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struct regulator *reg, **regulators;
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unsigned long latency_ns = 0;
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unsigned long min_uV = ~0, max_uV = 0;
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int ret;
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int ret, i, count;
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struct {
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unsigned long min;
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unsigned long max;
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} *uV;
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count = _get_regulator_count(dev);
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/* Regulator may not be required for the device */
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if (!count)
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return 0;
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regulators = kmalloc_array(count, sizeof(*regulators), GFP_KERNEL);
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if (!regulators)
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return 0;
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uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL);
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if (!uV)
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goto free_regulators;
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rcu_read_lock();
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opp_table = _find_opp_table(dev);
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if (IS_ERR(opp_table)) {
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rcu_read_unlock();
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return 0;
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goto free_uV;
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}
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reg = opp_table->regulator;
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if (IS_ERR(reg)) {
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/* Regulator may not be required for device */
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rcu_read_unlock();
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return 0;
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}
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memcpy(regulators, opp_table->regulators, count * sizeof(*regulators));
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list_for_each_entry_rcu(opp, &opp_table->opp_list, node) {
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if (!opp->available)
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continue;
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for (i = 0; i < count; i++) {
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uV[i].min = ~0;
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uV[i].max = 0;
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if (opp->u_volt_min < min_uV)
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min_uV = opp->u_volt_min;
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if (opp->u_volt_max > max_uV)
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max_uV = opp->u_volt_max;
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list_for_each_entry_rcu(opp, &opp_table->opp_list, node) {
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if (!opp->available)
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continue;
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if (opp->supplies[i].u_volt_min < uV[i].min)
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uV[i].min = opp->supplies[i].u_volt_min;
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if (opp->supplies[i].u_volt_max > uV[i].max)
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uV[i].max = opp->supplies[i].u_volt_max;
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}
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}
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rcu_read_unlock();
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@ -258,9 +295,16 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
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* The caller needs to ensure that opp_table (and hence the regulator)
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* isn't freed, while we are executing this routine.
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*/
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ret = regulator_set_voltage_time(reg, min_uV, max_uV);
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if (ret > 0)
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latency_ns = ret * 1000;
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for (i = 0; reg = regulators[i], i < count; i++) {
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ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max);
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if (ret > 0)
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latency_ns += ret * 1000;
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}
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free_uV:
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kfree(uV);
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free_regulators:
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kfree(regulators);
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return latency_ns;
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}
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@ -542,8 +586,7 @@ unlock:
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}
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static int _set_opp_voltage(struct device *dev, struct regulator *reg,
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unsigned long u_volt, unsigned long u_volt_min,
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unsigned long u_volt_max)
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struct dev_pm_opp_supply *supply)
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{
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int ret;
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@ -554,14 +597,78 @@ static int _set_opp_voltage(struct device *dev, struct regulator *reg,
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return 0;
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}
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dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, u_volt_min,
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u_volt, u_volt_max);
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dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__,
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supply->u_volt_min, supply->u_volt, supply->u_volt_max);
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ret = regulator_set_voltage_triplet(reg, u_volt_min, u_volt,
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u_volt_max);
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ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
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supply->u_volt, supply->u_volt_max);
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if (ret)
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dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
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__func__, u_volt_min, u_volt, u_volt_max, ret);
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__func__, supply->u_volt_min, supply->u_volt,
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supply->u_volt_max, ret);
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return ret;
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}
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static inline int
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_generic_set_opp_clk_only(struct device *dev, struct clk *clk,
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unsigned long old_freq, unsigned long freq)
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{
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int ret;
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ret = clk_set_rate(clk, freq);
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if (ret) {
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dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
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ret);
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}
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return ret;
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}
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static int _generic_set_opp(struct dev_pm_set_opp_data *data)
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{
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struct dev_pm_opp_supply *old_supply = data->old_opp.supplies;
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struct dev_pm_opp_supply *new_supply = data->new_opp.supplies;
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unsigned long old_freq = data->old_opp.rate, freq = data->new_opp.rate;
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struct regulator *reg = data->regulators[0];
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struct device *dev= data->dev;
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int ret;
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/* This function only supports single regulator per device */
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if (WARN_ON(data->regulator_count > 1)) {
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dev_err(dev, "multiple regulators are not supported\n");
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return -EINVAL;
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}
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/* Scaling up? Scale voltage before frequency */
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if (freq > old_freq) {
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ret = _set_opp_voltage(dev, reg, new_supply);
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if (ret)
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goto restore_voltage;
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}
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/* Change frequency */
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ret = _generic_set_opp_clk_only(dev, data->clk, old_freq, freq);
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if (ret)
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goto restore_voltage;
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/* Scaling down? Scale voltage after frequency */
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if (freq < old_freq) {
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ret = _set_opp_voltage(dev, reg, new_supply);
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if (ret)
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goto restore_freq;
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}
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return 0;
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restore_freq:
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if (_generic_set_opp_clk_only(dev, data->clk, freq, old_freq))
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dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
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__func__, old_freq);
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restore_voltage:
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/* This shouldn't harm even if the voltages weren't updated earlier */
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if (old_supply->u_volt)
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_set_opp_voltage(dev, reg, old_supply);
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return ret;
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}
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@ -579,12 +686,13 @@ static int _set_opp_voltage(struct device *dev, struct regulator *reg,
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int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
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{
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struct opp_table *opp_table;
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struct dev_pm_opp *old_opp, *opp;
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struct regulator *reg;
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struct clk *clk;
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unsigned long freq, old_freq;
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unsigned long u_volt, u_volt_min, u_volt_max;
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int ret;
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int (*set_opp)(struct dev_pm_set_opp_data *data);
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struct dev_pm_opp *old_opp, *opp;
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struct regulator **regulators;
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struct dev_pm_set_opp_data *data;
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struct clk *clk;
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int ret, size;
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if (unlikely(!target_freq)) {
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dev_err(dev, "%s: Invalid target frequency %lu\n", __func__,
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@ -633,55 +741,41 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
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return ret;
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}
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u_volt = opp->u_volt;
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u_volt_min = opp->u_volt_min;
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u_volt_max = opp->u_volt_max;
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dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__,
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old_freq, freq);
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reg = opp_table->regulator;
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regulators = opp_table->regulators;
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/* Only frequency scaling */
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if (!regulators) {
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rcu_read_unlock();
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return _generic_set_opp_clk_only(dev, clk, old_freq, freq);
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}
|
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|
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if (opp_table->set_opp)
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set_opp = opp_table->set_opp;
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else
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set_opp = _generic_set_opp;
|
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|
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data = opp_table->set_opp_data;
|
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data->regulators = regulators;
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data->regulator_count = opp_table->regulator_count;
|
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data->clk = clk;
|
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data->dev = dev;
|
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|
||||
data->old_opp.rate = old_freq;
|
||||
size = sizeof(*opp->supplies) * opp_table->regulator_count;
|
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if (IS_ERR(old_opp))
|
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memset(data->old_opp.supplies, 0, size);
|
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else
|
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memcpy(data->old_opp.supplies, old_opp->supplies, size);
|
||||
|
||||
data->new_opp.rate = freq;
|
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memcpy(data->new_opp.supplies, opp->supplies, size);
|
||||
|
||||
rcu_read_unlock();
|
||||
|
||||
/* Scaling up? Scale voltage before frequency */
|
||||
if (freq > old_freq) {
|
||||
ret = _set_opp_voltage(dev, reg, u_volt, u_volt_min,
|
||||
u_volt_max);
|
||||
if (ret)
|
||||
goto restore_voltage;
|
||||
}
|
||||
|
||||
/* Change frequency */
|
||||
|
||||
dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n",
|
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__func__, old_freq, freq);
|
||||
|
||||
ret = clk_set_rate(clk, freq);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
|
||||
ret);
|
||||
goto restore_voltage;
|
||||
}
|
||||
|
||||
/* Scaling down? Scale voltage after frequency */
|
||||
if (freq < old_freq) {
|
||||
ret = _set_opp_voltage(dev, reg, u_volt, u_volt_min,
|
||||
u_volt_max);
|
||||
if (ret)
|
||||
goto restore_freq;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
restore_freq:
|
||||
if (clk_set_rate(clk, old_freq))
|
||||
dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
|
||||
__func__, old_freq);
|
||||
restore_voltage:
|
||||
/* This shouldn't harm even if the voltages weren't updated earlier */
|
||||
if (!IS_ERR(old_opp))
|
||||
_set_opp_voltage(dev, reg, old_opp->u_volt,
|
||||
old_opp->u_volt_min, old_opp->u_volt_max);
|
||||
|
||||
return ret;
|
||||
return set_opp(data);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
|
||||
|
||||
|
|
@ -764,9 +858,6 @@ static struct opp_table *_add_opp_table(struct device *dev)
|
|||
|
||||
_of_init_opp_table(opp_table, dev);
|
||||
|
||||
/* Set regulator to a non-NULL error value */
|
||||
opp_table->regulator = ERR_PTR(-ENXIO);
|
||||
|
||||
/* Find clk for the device */
|
||||
opp_table->clk = clk_get(dev, NULL);
|
||||
if (IS_ERR(opp_table->clk)) {
|
||||
|
|
@ -815,7 +906,10 @@ static void _remove_opp_table(struct opp_table *opp_table)
|
|||
if (opp_table->prop_name)
|
||||
return;
|
||||
|
||||
if (!IS_ERR(opp_table->regulator))
|
||||
if (opp_table->regulators)
|
||||
return;
|
||||
|
||||
if (opp_table->set_opp)
|
||||
return;
|
||||
|
||||
/* Release clk */
|
||||
|
|
@ -924,34 +1018,50 @@ struct dev_pm_opp *_allocate_opp(struct device *dev,
|
|||
struct opp_table **opp_table)
|
||||
{
|
||||
struct dev_pm_opp *opp;
|
||||
int count, supply_size;
|
||||
struct opp_table *table;
|
||||
|
||||
/* allocate new OPP node */
|
||||
opp = kzalloc(sizeof(*opp), GFP_KERNEL);
|
||||
if (!opp)
|
||||
table = _add_opp_table(dev);
|
||||
if (!table)
|
||||
return NULL;
|
||||
|
||||
INIT_LIST_HEAD(&opp->node);
|
||||
/* Allocate space for at least one supply */
|
||||
count = table->regulator_count ? table->regulator_count : 1;
|
||||
supply_size = sizeof(*opp->supplies) * count;
|
||||
|
||||
*opp_table = _add_opp_table(dev);
|
||||
if (!*opp_table) {
|
||||
kfree(opp);
|
||||
/* allocate new OPP node and supplies structures */
|
||||
opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
|
||||
if (!opp) {
|
||||
kfree(table);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Put the supplies at the end of the OPP structure as an empty array */
|
||||
opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
|
||||
INIT_LIST_HEAD(&opp->node);
|
||||
|
||||
*opp_table = table;
|
||||
|
||||
return opp;
|
||||
}
|
||||
|
||||
static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
struct regulator *reg = opp_table->regulator;
|
||||
struct regulator *reg;
|
||||
int i;
|
||||
|
||||
if (!IS_ERR(reg) &&
|
||||
!regulator_is_supported_voltage(reg, opp->u_volt_min,
|
||||
opp->u_volt_max)) {
|
||||
pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
|
||||
__func__, opp->u_volt_min, opp->u_volt_max);
|
||||
return false;
|
||||
for (i = 0; i < opp_table->regulator_count; i++) {
|
||||
reg = opp_table->regulators[i];
|
||||
|
||||
if (!regulator_is_supported_voltage(reg,
|
||||
opp->supplies[i].u_volt_min,
|
||||
opp->supplies[i].u_volt_max)) {
|
||||
pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
|
||||
__func__, opp->supplies[i].u_volt_min,
|
||||
opp->supplies[i].u_volt_max);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
|
|
@ -983,11 +1093,13 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
|
|||
|
||||
/* Duplicate OPPs */
|
||||
dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
|
||||
__func__, opp->rate, opp->u_volt, opp->available,
|
||||
new_opp->rate, new_opp->u_volt, new_opp->available);
|
||||
__func__, opp->rate, opp->supplies[0].u_volt,
|
||||
opp->available, new_opp->rate,
|
||||
new_opp->supplies[0].u_volt, new_opp->available);
|
||||
|
||||
return opp->available && new_opp->u_volt == opp->u_volt ?
|
||||
0 : -EEXIST;
|
||||
/* Should we compare voltages for all regulators here ? */
|
||||
return opp->available &&
|
||||
new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? 0 : -EEXIST;
|
||||
}
|
||||
|
||||
new_opp->opp_table = opp_table;
|
||||
|
|
@ -1054,9 +1166,9 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
|
|||
/* populate the opp table */
|
||||
new_opp->rate = freq;
|
||||
tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
|
||||
new_opp->u_volt = u_volt;
|
||||
new_opp->u_volt_min = u_volt - tol;
|
||||
new_opp->u_volt_max = u_volt + tol;
|
||||
new_opp->supplies[0].u_volt = u_volt;
|
||||
new_opp->supplies[0].u_volt_min = u_volt - tol;
|
||||
new_opp->supplies[0].u_volt_max = u_volt + tol;
|
||||
new_opp->available = true;
|
||||
new_opp->dynamic = dynamic;
|
||||
|
||||
|
|
@ -1300,13 +1412,47 @@ unlock:
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
|
||||
|
||||
static int _allocate_set_opp_data(struct opp_table *opp_table)
|
||||
{
|
||||
struct dev_pm_set_opp_data *data;
|
||||
int len, count = opp_table->regulator_count;
|
||||
|
||||
if (WARN_ON(!count))
|
||||
return -EINVAL;
|
||||
|
||||
/* space for set_opp_data */
|
||||
len = sizeof(*data);
|
||||
|
||||
/* space for old_opp.supplies and new_opp.supplies */
|
||||
len += 2 * sizeof(struct dev_pm_opp_supply) * count;
|
||||
|
||||
data = kzalloc(len, GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->old_opp.supplies = (void *)(data + 1);
|
||||
data->new_opp.supplies = data->old_opp.supplies + count;
|
||||
|
||||
opp_table->set_opp_data = data;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void _free_set_opp_data(struct opp_table *opp_table)
|
||||
{
|
||||
kfree(opp_table->set_opp_data);
|
||||
opp_table->set_opp_data = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_set_regulator() - Set regulator name for the device
|
||||
* dev_pm_opp_set_regulators() - Set regulator names for the device
|
||||
* @dev: Device for which regulator name is being set.
|
||||
* @name: Name of the regulator.
|
||||
* @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 regulator, as the core would be required to switch voltages as well.
|
||||
* device's regulators, as the core would be required to switch voltages as
|
||||
* well.
|
||||
*
|
||||
* This must be called before any OPPs are initialized for the device.
|
||||
*
|
||||
|
|
@ -1316,11 +1462,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
|
|||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_set_regulator(struct device *dev, const char *name)
|
||||
struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
|
||||
const char * const names[],
|
||||
unsigned int count)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
struct regulator *reg;
|
||||
int ret;
|
||||
int ret, i;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
|
|
@ -1336,22 +1484,146 @@ int dev_pm_opp_set_regulator(struct device *dev, const char *name)
|
|||
goto err;
|
||||
}
|
||||
|
||||
/* Already have a regulator set */
|
||||
if (WARN_ON(!IS_ERR(opp_table->regulator))) {
|
||||
/* Already have regulators set */
|
||||
if (opp_table->regulators) {
|
||||
ret = -EBUSY;
|
||||
goto err;
|
||||
}
|
||||
/* Allocate the regulator */
|
||||
reg = regulator_get_optional(dev, name);
|
||||
if (IS_ERR(reg)) {
|
||||
ret = PTR_ERR(reg);
|
||||
if (ret != -EPROBE_DEFER)
|
||||
dev_err(dev, "%s: no regulator (%s) found: %d\n",
|
||||
__func__, name, ret);
|
||||
|
||||
opp_table->regulators = kmalloc_array(count,
|
||||
sizeof(*opp_table->regulators),
|
||||
GFP_KERNEL);
|
||||
if (!opp_table->regulators) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
opp_table->regulator = reg;
|
||||
for (i = 0; i < count; i++) {
|
||||
reg = regulator_get_optional(dev, names[i]);
|
||||
if (IS_ERR(reg)) {
|
||||
ret = PTR_ERR(reg);
|
||||
if (ret != -EPROBE_DEFER)
|
||||
dev_err(dev, "%s: no regulator (%s) found: %d\n",
|
||||
__func__, names[i], ret);
|
||||
goto free_regulators;
|
||||
}
|
||||
|
||||
opp_table->regulators[i] = reg;
|
||||
}
|
||||
|
||||
opp_table->regulator_count = count;
|
||||
|
||||
/* Allocate block only once to pass to set_opp() routines */
|
||||
ret = _allocate_set_opp_data(opp_table);
|
||||
if (ret)
|
||||
goto free_regulators;
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return opp_table;
|
||||
|
||||
free_regulators:
|
||||
while (i != 0)
|
||||
regulator_put(opp_table->regulators[--i]);
|
||||
|
||||
kfree(opp_table->regulators);
|
||||
opp_table->regulators = NULL;
|
||||
opp_table->regulator_count = 0;
|
||||
err:
|
||||
_remove_opp_table(opp_table);
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_put_regulators() - Releases resources blocked for regulator
|
||||
* @opp_table: OPP table returned from dev_pm_opp_set_regulators().
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_put_regulators(struct opp_table *opp_table)
|
||||
{
|
||||
int i;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
if (!opp_table->regulators) {
|
||||
pr_err("%s: Doesn't have regulators set\n", __func__);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
/* Make sure there are no concurrent readers while updating opp_table */
|
||||
WARN_ON(!list_empty(&opp_table->opp_list));
|
||||
|
||||
for (i = opp_table->regulator_count - 1; i >= 0; i--)
|
||||
regulator_put(opp_table->regulators[i]);
|
||||
|
||||
_free_set_opp_data(opp_table);
|
||||
|
||||
kfree(opp_table->regulators);
|
||||
opp_table->regulators = NULL;
|
||||
opp_table->regulator_count = 0;
|
||||
|
||||
/* Try freeing opp_table if this was the last blocking resource */
|
||||
_remove_opp_table(opp_table);
|
||||
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper
|
||||
* @dev: Device for which the helper is getting registered.
|
||||
* @set_opp: Custom set OPP helper.
|
||||
*
|
||||
* This is useful to support complex platforms (like platforms with multiple
|
||||
* regulators per device), instead of the generic OPP set rate helper.
|
||||
*
|
||||
* This must be called before any OPPs are initialized for the device.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_register_set_opp_helper(struct device *dev,
|
||||
int (*set_opp)(struct dev_pm_set_opp_data *data))
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
int ret;
|
||||
|
||||
if (!set_opp)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _add_opp_table(dev);
|
||||
if (!opp_table) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
/* This should be called before OPPs are initialized */
|
||||
if (WARN_ON(!list_empty(&opp_table->opp_list))) {
|
||||
ret = -EBUSY;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* Already have custom set_opp helper */
|
||||
if (WARN_ON(opp_table->set_opp)) {
|
||||
ret = -EBUSY;
|
||||
goto err;
|
||||
}
|
||||
|
||||
opp_table->set_opp = set_opp;
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return 0;
|
||||
|
|
@ -1363,11 +1635,12 @@ unlock:
|
|||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulator);
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_put_regulator() - Releases resources blocked for regulator
|
||||
* @dev: Device for which regulator was set.
|
||||
* dev_pm_opp_register_put_opp_helper() - Releases resources blocked for
|
||||
* set_opp helper
|
||||
* @dev: Device for which custom set_opp helper has to be cleared.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
|
|
@ -1375,7 +1648,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulator);
|
|||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_put_regulator(struct device *dev)
|
||||
void dev_pm_opp_register_put_opp_helper(struct device *dev)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
|
||||
|
|
@ -1389,16 +1662,16 @@ void dev_pm_opp_put_regulator(struct device *dev)
|
|||
goto unlock;
|
||||
}
|
||||
|
||||
if (IS_ERR(opp_table->regulator)) {
|
||||
dev_err(dev, "%s: Doesn't have regulator set\n", __func__);
|
||||
if (!opp_table->set_opp) {
|
||||
dev_err(dev, "%s: Doesn't have custom set_opp helper set\n",
|
||||
__func__);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
/* Make sure there are no concurrent readers while updating opp_table */
|
||||
WARN_ON(!list_empty(&opp_table->opp_list));
|
||||
|
||||
regulator_put(opp_table->regulator);
|
||||
opp_table->regulator = ERR_PTR(-ENXIO);
|
||||
opp_table->set_opp = NULL;
|
||||
|
||||
/* Try freeing opp_table if this was the last blocking resource */
|
||||
_remove_opp_table(opp_table);
|
||||
|
|
@ -1406,7 +1679,7 @@ void dev_pm_opp_put_regulator(struct device *dev)
|
|||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulator);
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_register_put_opp_helper);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_add() - Add an OPP table from a table definitions
|
||||
|
|
|
|||
|
|
@ -15,6 +15,7 @@
|
|||
#include <linux/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/limits.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include "opp.h"
|
||||
|
||||
|
|
@ -34,6 +35,46 @@ void opp_debug_remove_one(struct dev_pm_opp *opp)
|
|||
debugfs_remove_recursive(opp->dentry);
|
||||
}
|
||||
|
||||
static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
|
||||
struct opp_table *opp_table,
|
||||
struct dentry *pdentry)
|
||||
{
|
||||
struct dentry *d;
|
||||
int i = 0;
|
||||
char *name;
|
||||
|
||||
/* Always create at least supply-0 directory */
|
||||
do {
|
||||
name = kasprintf(GFP_KERNEL, "supply-%d", i);
|
||||
|
||||
/* Create per-opp directory */
|
||||
d = debugfs_create_dir(name, pdentry);
|
||||
|
||||
kfree(name);
|
||||
|
||||
if (!d)
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt_min))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt_max))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_amp", S_IRUGO, d,
|
||||
&opp->supplies[i].u_amp))
|
||||
return false;
|
||||
} while (++i < opp_table->regulator_count);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
|
||||
{
|
||||
struct dentry *pdentry = opp_table->dentry;
|
||||
|
|
@ -63,16 +104,7 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
|
|||
if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->u_volt))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->u_volt_min))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->u_volt_max))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->u_amp))
|
||||
if (!opp_debug_create_supplies(opp, opp_table, d))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@
|
|||
#include <linux/errno.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/export.h>
|
||||
|
||||
#include "opp.h"
|
||||
|
|
@ -101,16 +102,16 @@ static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
|
|||
return true;
|
||||
}
|
||||
|
||||
/* TODO: Support multiple regulators */
|
||||
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
u32 microvolt[3] = {0};
|
||||
u32 val;
|
||||
int count, ret;
|
||||
u32 *microvolt, *microamp = NULL;
|
||||
int supplies, vcount, icount, ret, i, j;
|
||||
struct property *prop = NULL;
|
||||
char name[NAME_MAX];
|
||||
|
||||
supplies = opp_table->regulator_count ? opp_table->regulator_count : 1;
|
||||
|
||||
/* Search for "opp-microvolt-<name>" */
|
||||
if (opp_table->prop_name) {
|
||||
snprintf(name, sizeof(name), "opp-microvolt-%s",
|
||||
|
|
@ -128,34 +129,29 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
|
|||
return 0;
|
||||
}
|
||||
|
||||
count = of_property_count_u32_elems(opp->np, name);
|
||||
if (count < 0) {
|
||||
vcount = of_property_count_u32_elems(opp->np, name);
|
||||
if (vcount < 0) {
|
||||
dev_err(dev, "%s: Invalid %s property (%d)\n",
|
||||
__func__, name, count);
|
||||
return count;
|
||||
__func__, name, vcount);
|
||||
return vcount;
|
||||
}
|
||||
|
||||
/* There can be one or three elements here */
|
||||
if (count != 1 && count != 3) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d)\n",
|
||||
__func__, name, count);
|
||||
/* There can be one or three elements per supply */
|
||||
if (vcount != supplies && vcount != supplies * 3) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
|
||||
__func__, name, vcount, supplies);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microvolt, count);
|
||||
microvolt = kmalloc_array(vcount, sizeof(*microvolt), GFP_KERNEL);
|
||||
if (!microvolt)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microvolt, vcount);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
opp->u_volt = microvolt[0];
|
||||
|
||||
if (count == 1) {
|
||||
opp->u_volt_min = opp->u_volt;
|
||||
opp->u_volt_max = opp->u_volt;
|
||||
} else {
|
||||
opp->u_volt_min = microvolt[1];
|
||||
opp->u_volt_max = microvolt[2];
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
/* Search for "opp-microamp-<name>" */
|
||||
|
|
@ -172,10 +168,59 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
|
|||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (prop && !of_property_read_u32(opp->np, name, &val))
|
||||
opp->u_amp = val;
|
||||
if (prop) {
|
||||
icount = of_property_count_u32_elems(opp->np, name);
|
||||
if (icount < 0) {
|
||||
dev_err(dev, "%s: Invalid %s property (%d)\n", __func__,
|
||||
name, icount);
|
||||
ret = icount;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
return 0;
|
||||
if (icount != supplies) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
|
||||
__func__, name, icount, supplies);
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
microamp = kmalloc_array(icount, sizeof(*microamp), GFP_KERNEL);
|
||||
if (!microamp) {
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microamp,
|
||||
icount);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: error parsing %s: %d\n", __func__,
|
||||
name, ret);
|
||||
ret = -EINVAL;
|
||||
goto free_microamp;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0, j = 0; i < supplies; i++) {
|
||||
opp->supplies[i].u_volt = microvolt[j++];
|
||||
|
||||
if (vcount == supplies) {
|
||||
opp->supplies[i].u_volt_min = opp->supplies[i].u_volt;
|
||||
opp->supplies[i].u_volt_max = opp->supplies[i].u_volt;
|
||||
} else {
|
||||
opp->supplies[i].u_volt_min = microvolt[j++];
|
||||
opp->supplies[i].u_volt_max = microvolt[j++];
|
||||
}
|
||||
|
||||
if (microamp)
|
||||
opp->supplies[i].u_amp = microamp[i];
|
||||
}
|
||||
|
||||
free_microamp:
|
||||
kfree(microamp);
|
||||
free_microvolt:
|
||||
kfree(microvolt);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -198,7 +243,7 @@ void dev_pm_opp_of_remove_table(struct device *dev)
|
|||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
|
||||
|
||||
/* Returns opp descriptor node for a device, caller must do of_node_put() */
|
||||
struct device_node *_of_get_opp_desc_node(struct device *dev)
|
||||
static struct device_node *_of_get_opp_desc_node(struct device *dev)
|
||||
{
|
||||
/*
|
||||
* TODO: Support for multiple OPP tables.
|
||||
|
|
@ -303,9 +348,9 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
|
|||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
|
||||
__func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
|
||||
new_opp->u_volt_min, new_opp->u_volt_max,
|
||||
new_opp->clock_latency_ns);
|
||||
__func__, new_opp->turbo, new_opp->rate,
|
||||
new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min,
|
||||
new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns);
|
||||
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
|
|
@ -562,7 +607,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
|
|||
/* Get OPP descriptor node */
|
||||
np = _of_get_opp_desc_node(cpu_dev);
|
||||
if (!np) {
|
||||
dev_dbg(cpu_dev, "%s: Couldn't find cpu_dev node.\n", __func__);
|
||||
dev_dbg(cpu_dev, "%s: Couldn't find opp node.\n", __func__);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
|
|
@ -587,7 +632,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
|
|||
/* Get OPP descriptor node */
|
||||
tmp_np = _of_get_opp_desc_node(tcpu_dev);
|
||||
if (!tmp_np) {
|
||||
dev_err(tcpu_dev, "%s: Couldn't find tcpu_dev node.\n",
|
||||
dev_err(tcpu_dev, "%s: Couldn't find opp node.\n",
|
||||
__func__);
|
||||
ret = -ENOENT;
|
||||
goto put_cpu_node;
|
||||
|
|
|
|||
|
|
@ -61,10 +61,7 @@ extern struct list_head opp_tables;
|
|||
* @turbo: true if turbo (boost) OPP
|
||||
* @suspend: true if suspend OPP
|
||||
* @rate: Frequency in hertz
|
||||
* @u_volt: Target voltage in microvolts corresponding to this OPP
|
||||
* @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
|
||||
* @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
|
||||
* @u_amp: Maximum current drawn by the device in microamperes
|
||||
* @supplies: Power supplies voltage/current values
|
||||
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
|
||||
* frequency from any other OPP's frequency.
|
||||
* @opp_table: points back to the opp_table struct this opp belongs to
|
||||
|
|
@ -83,10 +80,8 @@ struct dev_pm_opp {
|
|||
bool suspend;
|
||||
unsigned long rate;
|
||||
|
||||
unsigned long u_volt;
|
||||
unsigned long u_volt_min;
|
||||
unsigned long u_volt_max;
|
||||
unsigned long u_amp;
|
||||
struct dev_pm_opp_supply *supplies;
|
||||
|
||||
unsigned long clock_latency_ns;
|
||||
|
||||
struct opp_table *opp_table;
|
||||
|
|
@ -144,7 +139,10 @@ enum opp_table_access {
|
|||
* @supported_hw_count: Number of elements in supported_hw array.
|
||||
* @prop_name: A name to postfix to many DT properties, while parsing them.
|
||||
* @clk: Device's clock handle
|
||||
* @regulator: Supply regulator
|
||||
* @regulators: Supply regulators
|
||||
* @regulator_count: Number of power supply regulators
|
||||
* @set_opp: Platform specific set_opp callback
|
||||
* @set_opp_data: Data to be passed to set_opp callback
|
||||
* @dentry: debugfs dentry pointer of the real device directory (not links).
|
||||
* @dentry_name: Name of the real dentry.
|
||||
*
|
||||
|
|
@ -179,7 +177,11 @@ struct opp_table {
|
|||
unsigned int supported_hw_count;
|
||||
const char *prop_name;
|
||||
struct clk *clk;
|
||||
struct regulator *regulator;
|
||||
struct regulator **regulators;
|
||||
unsigned int regulator_count;
|
||||
|
||||
int (*set_opp)(struct dev_pm_set_opp_data *data);
|
||||
struct dev_pm_set_opp_data *set_opp_data;
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
struct dentry *dentry;
|
||||
|
|
@ -190,7 +192,6 @@ struct opp_table {
|
|||
/* Routines internal to opp core */
|
||||
struct opp_table *_find_opp_table(struct device *dev);
|
||||
struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
|
||||
struct device_node *_of_get_opp_desc_node(struct device *dev);
|
||||
void _dev_pm_opp_remove_table(struct device *dev, bool remove_all);
|
||||
struct dev_pm_opp *_allocate_opp(struct device *dev, struct opp_table **opp_table);
|
||||
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
|
||||
|
|
|
|||
|
|
@ -28,6 +28,7 @@
|
|||
#include "cpufreq-dt.h"
|
||||
|
||||
struct private_data {
|
||||
struct opp_table *opp_table;
|
||||
struct device *cpu_dev;
|
||||
struct thermal_cooling_device *cdev;
|
||||
const char *reg_name;
|
||||
|
|
@ -143,6 +144,7 @@ static int resources_available(void)
|
|||
static int cpufreq_init(struct cpufreq_policy *policy)
|
||||
{
|
||||
struct cpufreq_frequency_table *freq_table;
|
||||
struct opp_table *opp_table = NULL;
|
||||
struct private_data *priv;
|
||||
struct device *cpu_dev;
|
||||
struct clk *cpu_clk;
|
||||
|
|
@ -186,8 +188,9 @@ static int cpufreq_init(struct cpufreq_policy *policy)
|
|||
*/
|
||||
name = find_supply_name(cpu_dev);
|
||||
if (name) {
|
||||
ret = dev_pm_opp_set_regulator(cpu_dev, name);
|
||||
if (ret) {
|
||||
opp_table = dev_pm_opp_set_regulators(cpu_dev, &name, 1);
|
||||
if (IS_ERR(opp_table)) {
|
||||
ret = PTR_ERR(opp_table);
|
||||
dev_err(cpu_dev, "Failed to set regulator for cpu%d: %d\n",
|
||||
policy->cpu, ret);
|
||||
goto out_put_clk;
|
||||
|
|
@ -237,6 +240,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
|
|||
}
|
||||
|
||||
priv->reg_name = name;
|
||||
priv->opp_table = opp_table;
|
||||
|
||||
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
|
||||
if (ret) {
|
||||
|
|
@ -285,7 +289,7 @@ out_free_priv:
|
|||
out_free_opp:
|
||||
dev_pm_opp_of_cpumask_remove_table(policy->cpus);
|
||||
if (name)
|
||||
dev_pm_opp_put_regulator(cpu_dev);
|
||||
dev_pm_opp_put_regulators(opp_table);
|
||||
out_put_clk:
|
||||
clk_put(cpu_clk);
|
||||
|
||||
|
|
@ -300,7 +304,7 @@ static int cpufreq_exit(struct cpufreq_policy *policy)
|
|||
dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
|
||||
dev_pm_opp_of_cpumask_remove_table(policy->related_cpus);
|
||||
if (priv->reg_name)
|
||||
dev_pm_opp_put_regulator(priv->cpu_dev);
|
||||
dev_pm_opp_put_regulators(priv->opp_table);
|
||||
|
||||
clk_put(policy->clk);
|
||||
kfree(priv);
|
||||
|
|
|
|||
|
|
@ -17,13 +17,65 @@
|
|||
#include <linux/err.h>
|
||||
#include <linux/notifier.h>
|
||||
|
||||
struct clk;
|
||||
struct regulator;
|
||||
struct dev_pm_opp;
|
||||
struct device;
|
||||
struct opp_table;
|
||||
|
||||
enum dev_pm_opp_event {
|
||||
OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct dev_pm_opp_supply - Power supply voltage/current values
|
||||
* @u_volt: Target voltage in microvolts corresponding to this OPP
|
||||
* @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
|
||||
* @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
|
||||
* @u_amp: Maximum current drawn by the device in microamperes
|
||||
*
|
||||
* This structure stores the voltage/current values for a single power supply.
|
||||
*/
|
||||
struct dev_pm_opp_supply {
|
||||
unsigned long u_volt;
|
||||
unsigned long u_volt_min;
|
||||
unsigned long u_volt_max;
|
||||
unsigned long u_amp;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct dev_pm_opp_info - OPP freq/voltage/current values
|
||||
* @rate: Target clk rate in hz
|
||||
* @supplies: Array of voltage/current values for all power supplies
|
||||
*
|
||||
* This structure stores the freq/voltage/current values for a single OPP.
|
||||
*/
|
||||
struct dev_pm_opp_info {
|
||||
unsigned long rate;
|
||||
struct dev_pm_opp_supply *supplies;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct dev_pm_set_opp_data - Set OPP data
|
||||
* @old_opp: Old OPP info
|
||||
* @new_opp: New OPP info
|
||||
* @regulators: Array of regulator pointers
|
||||
* @regulator_count: Number of regulators
|
||||
* @clk: Pointer to clk
|
||||
* @dev: Pointer to the struct device
|
||||
*
|
||||
* This structure contains all information required for setting an OPP.
|
||||
*/
|
||||
struct dev_pm_set_opp_data {
|
||||
struct dev_pm_opp_info old_opp;
|
||||
struct dev_pm_opp_info new_opp;
|
||||
|
||||
struct regulator **regulators;
|
||||
unsigned int regulator_count;
|
||||
struct clk *clk;
|
||||
struct device *dev;
|
||||
};
|
||||
|
||||
#if defined(CONFIG_PM_OPP)
|
||||
|
||||
unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
|
||||
|
|
@ -62,8 +114,10 @@ int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
|
|||
void dev_pm_opp_put_supported_hw(struct device *dev);
|
||||
int dev_pm_opp_set_prop_name(struct device *dev, const char *name);
|
||||
void dev_pm_opp_put_prop_name(struct device *dev);
|
||||
int dev_pm_opp_set_regulator(struct device *dev, const char *name);
|
||||
void dev_pm_opp_put_regulator(struct device *dev);
|
||||
struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
|
||||
void dev_pm_opp_put_regulators(struct opp_table *opp_table);
|
||||
int dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
|
||||
void dev_pm_opp_register_put_opp_helper(struct device *dev);
|
||||
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
|
||||
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
|
||||
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
|
||||
|
|
@ -163,6 +217,14 @@ static inline int dev_pm_opp_set_supported_hw(struct device *dev,
|
|||
|
||||
static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
|
||||
|
||||
static inline int dev_pm_opp_register_set_opp_helper(struct device *dev,
|
||||
int (*set_opp)(struct dev_pm_set_opp_data *data))
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
|
||||
static inline void dev_pm_opp_register_put_opp_helper(struct device *dev) {}
|
||||
|
||||
static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
|
|
@ -170,12 +232,12 @@ static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
|
|||
|
||||
static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
|
||||
|
||||
static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
|
||||
static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
return ERR_PTR(-ENOTSUPP);
|
||||
}
|
||||
|
||||
static inline void dev_pm_opp_put_regulator(struct device *dev) {}
|
||||
static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
|
||||
|
||||
static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in a new issue