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Commit f5c233c8 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
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Merge branch 'pm-opp' into pm 

* pm-opp: (37 commits)
  PM / devfreq: Add required OPPs support to passive governor
  PM / devfreq: Cache OPP table reference in devfreq
  OPP: Add function to look up required OPP's for a given OPP
  opp: Replace ENOTSUPP with EOPNOTSUPP
  opp: Fix "foo * bar" should be "foo *bar"
  opp: Don't ignore clk_get() errors other than -ENOENT
  opp: Update bandwidth requirements based on scaling up/down
  opp: Allow lazy-linking of required-opps
  opp: Remove dev_pm_opp_set_bw()
  devfreq: tegra30: Migrate to dev_pm_opp_set_opp()
  drm: msm: Migrate to dev_pm_opp_set_opp()
  cpufreq: qcom: Migrate to dev_pm_opp_set_opp()
  opp: Implement dev_pm_opp_set_opp()
  opp: Update parameters of  _set_opp_custom()
  opp: Allow _generic_set_opp_clk_only() to work for non-freq devices
  opp: Allow _generic_set_opp_regulator() to work for non-freq devices
  opp: Allow _set_opp() to work for non-freq devices
  opp: Split _set_opp() out of dev_pm_opp_set_rate()
  opp: Keep track of currently programmed OPP
  opp: No need to check clk for errors
  ...
parents 6621cd2d 992b9ff1
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Showing with 885 additions and 339 deletions
drivers/cpufreq/qcom-cpufreq-hw.c
View file @ f5c233c8
......@@ -54,7 +54,7 @@ static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy,
if (IS_ERR(opp))
return PTR_ERR(opp);
ret = dev_pm_opp_set_bw(dev, opp);
ret = dev_pm_opp_set_opp(dev, opp);
dev_pm_opp_put(opp);
return ret;
}
......
drivers/devfreq/devfreq.c
View file @ f5c233c8
......@@ -757,6 +757,9 @@ static void devfreq_dev_release(struct device *dev)
if (devfreq->profile->exit)
devfreq->profile->exit(devfreq->dev.parent);
if (devfreq->opp_table)
dev_pm_opp_put_opp_table(devfreq->opp_table);
mutex_destroy(&devfreq->lock);
kfree(devfreq);
}
......@@ -844,6 +847,10 @@ struct devfreq *devfreq_add_device(struct device *dev,
}
devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
devfreq->opp_table = dev_pm_opp_get_opp_table(dev);
if (IS_ERR(devfreq->opp_table))
devfreq->opp_table = NULL;
atomic_set(&devfreq->suspend_count, 0);
dev_set_name(&devfreq->dev, "%s", dev_name(dev));
......
drivers/devfreq/governor_passive.c
View file @ f5c233c8
......@@ -19,18 +19,16 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
= (struct devfreq_passive_data *)devfreq->data;
struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;
unsigned long child_freq = ULONG_MAX;
struct dev_pm_opp *opp;
int i, count, ret = 0;
struct dev_pm_opp *opp, *p_opp;
int i, count;
/*
* If the devfreq device with passive governor has the specific method
* to determine the next frequency, should use the get_target_freq()
* of struct devfreq_passive_data.
*/
if (p_data->get_target_freq) {
ret = p_data->get_target_freq(devfreq, freq);
goto out;
}
if (p_data->get_target_freq)
return p_data->get_target_freq(devfreq, freq);
/*
* If the parent and passive devfreq device uses the OPP table,
......@@ -56,26 +54,35 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
* list of parent device. Because in this case, *freq is temporary
* value which is decided by ondemand governor.
*/
opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0);
if (IS_ERR(opp)) {
ret = PTR_ERR(opp);
goto out;
}
if (devfreq->opp_table && parent_devfreq->opp_table) {
p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent,
freq, 0);
if (IS_ERR(p_opp))
return PTR_ERR(p_opp);
opp = dev_pm_opp_xlate_required_opp(parent_devfreq->opp_table,
devfreq->opp_table, p_opp);
dev_pm_opp_put(p_opp);
dev_pm_opp_put(opp);
if (IS_ERR(opp))
return PTR_ERR(opp);
*freq = dev_pm_opp_get_freq(opp);
dev_pm_opp_put(opp);
return 0;
}
/*
* Get the OPP table's index of decided freqeuncy by governor
* Get the OPP table's index of decided frequency by governor
* of parent device.
*/
for (i = 0; i < parent_devfreq->profile->max_state; i++)
if (parent_devfreq->profile->freq_table[i] == *freq)
break;
if (i == parent_devfreq->profile->max_state) {
ret = -EINVAL;
goto out;
}
if (i == parent_devfreq->profile->max_state)
return -EINVAL;
/* Get the suitable frequency by using index of parent device. */
if (i < devfreq->profile->max_state) {
......@@ -88,8 +95,7 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
/* Return the suitable frequency for passive device. */
*freq = child_freq;
out:
return ret;
return 0;
}
static int devfreq_passive_notifier_call(struct notifier_block *nb,
......
drivers/devfreq/tegra30-devfreq.c
View file @ f5c233c8
......@@ -647,7 +647,7 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
return PTR_ERR(opp);
}
ret = dev_pm_opp_set_bw(dev, opp);
ret = dev_pm_opp_set_opp(dev, opp);
dev_pm_opp_put(opp);
return ret;
......@@ -849,7 +849,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
return err;
}
err = dev_pm_opp_of_add_table(&pdev->dev);
err = dev_pm_opp_of_add_table_noclk(&pdev->dev, 0);
if (err) {
dev_err(&pdev->dev, "Failed to add OPP table: %d\n", err);
goto put_hw;
......
drivers/gpu/drm/msm/adreno/a6xx_gmu.c
View file @ f5c233c8
......@@ -134,7 +134,7 @@ void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp)
if (!gmu->legacy) {
a6xx_hfi_set_freq(gmu, perf_index);
dev_pm_opp_set_bw(&gpu->pdev->dev, opp);
dev_pm_opp_set_opp(&gpu->pdev->dev, opp);
pm_runtime_put(gmu->dev);
return;
}
......@@ -158,7 +158,7 @@ void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp)
if (ret)
dev_err(gmu->dev, "GMU set GPU frequency error: %d\n", ret);
dev_pm_opp_set_bw(&gpu->pdev->dev, opp);
dev_pm_opp_set_opp(&gpu->pdev->dev, opp);
pm_runtime_put(gmu->dev);
}
......@@ -866,7 +866,7 @@ static void a6xx_gmu_set_initial_bw(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
if (IS_ERR_OR_NULL(gpu_opp))
return;
dev_pm_opp_set_bw(&gpu->pdev->dev, gpu_opp);
dev_pm_opp_set_opp(&gpu->pdev->dev, gpu_opp);
dev_pm_opp_put(gpu_opp);
}
......@@ -1072,7 +1072,7 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
a6xx_gmu_shutdown(gmu);
/* Remove the bus vote */
dev_pm_opp_set_bw(&gpu->pdev->dev, NULL);
dev_pm_opp_set_opp(&gpu->pdev->dev, NULL);
/*
* Make sure the GX domain is off before turning off the GMU (CX)
......
drivers/opp/core.c
View file @ f5c233c8
......@@ -27,6 +27,10 @@
* various states of availability.
*/
LIST_HEAD(opp_tables);
/* OPP tables with uninitialized required OPPs */
LIST_HEAD(lazy_opp_tables);
/* Lock to allow exclusive modification to the device and opp lists */
DEFINE_MUTEX(opp_table_lock);
/* Flag indicating that opp_tables list is being updated at the moment */
......@@ -145,6 +149,32 @@ unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
/**
* dev_pm_opp_get_required_pstate() - Gets the required performance state
* corresponding to an available opp
* @opp: opp for which performance state has to be returned for
* @index: index of the required opp
*
* Return: performance state read from device tree corresponding to the
* required opp, else return 0.
*/
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index)
{
if (IS_ERR_OR_NULL(opp) || !opp->available ||
index >= opp->opp_table->required_opp_count) {
pr_err("%s: Invalid parameters\n", __func__);
return 0;
}
/* required-opps not fully initialized yet */
if (lazy_linking_pending(opp->opp_table))
return 0;
return opp->required_opps[index]->pstate;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate);
/**
* dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
* @opp: opp for which turbo mode is being verified
......@@ -449,6 +479,55 @@ struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact);
/**
* dev_pm_opp_find_level_ceil() - search for an rounded up level
* @dev: device for which we do this operation
* @level: level to search for
*
* Return: Searches for rounded up match in the opp table and returns pointer
* to the matching opp if found, 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_ceil(struct device *dev,
unsigned int *level)
{
struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
int r = PTR_ERR(opp_table);
dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
return ERR_PTR(r);
}
mutex_lock(&opp_table->lock);
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available && temp_opp->level >= *level) {
opp = temp_opp;
*level = opp->level;
/* Increment the reference count of OPP */
dev_pm_opp_get(opp);
break;
}
}
mutex_unlock(&opp_table->lock);
dev_pm_opp_put_opp_table(opp_table);
return opp;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table,
unsigned long *freq)
{
......@@ -655,6 +734,10 @@ static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk,
{
int ret;
/* We may reach here for devices which don't change frequency */
if (IS_ERR(clk))
return 0;
ret = clk_set_rate(clk, freq);
if (ret) {
dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
......@@ -666,12 +749,12 @@ static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk,
static int _generic_set_opp_regulator(struct opp_table *opp_table,
struct device *dev,
unsigned long old_freq,
struct dev_pm_opp *opp,
unsigned long freq,
struct dev_pm_opp_supply *old_supply,
struct dev_pm_opp_supply *new_supply)
int scaling_down)
{
struct regulator *reg = opp_table->regulators[0];
struct dev_pm_opp *old_opp = opp_table->current_opp;
int ret;
/* This function only supports single regulator per device */
......@@ -681,8 +764,8 @@ static int _generic_set_opp_regulator(struct opp_table *opp_table,
}
/* Scaling up? Scale voltage before frequency */
if (freq >= old_freq) {
ret = _set_opp_voltage(dev, reg, new_supply);
if (!scaling_down) {
ret = _set_opp_voltage(dev, reg, opp->supplies);
if (ret)
goto restore_voltage;
}
......@@ -693,8 +776,8 @@ static int _generic_set_opp_regulator(struct opp_table *opp_table,
goto restore_voltage;
/* Scaling down? Scale voltage after frequency */
if (freq < old_freq) {
ret = _set_opp_voltage(dev, reg, new_supply);
if (scaling_down) {
ret = _set_opp_voltage(dev, reg, opp->supplies);
if (ret)
goto restore_freq;
}
......@@ -712,19 +795,18 @@ static int _generic_set_opp_regulator(struct opp_table *opp_table,
return 0;
restore_freq:
if (_generic_set_opp_clk_only(dev, opp_table->clk, old_freq))
if (_generic_set_opp_clk_only(dev, opp_table->clk, old_opp->rate))
dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
__func__, old_freq);
__func__, old_opp->rate);
restore_voltage:
/* This shouldn't harm even if the voltages weren't updated earlier */
if (old_supply)
_set_opp_voltage(dev, reg, old_supply);
_set_opp_voltage(dev, reg, old_opp->supplies);
return ret;
}
static int _set_opp_bw(const struct opp_table *opp_table,
struct dev_pm_opp *opp, struct device *dev, bool remove)
struct dev_pm_opp *opp, struct device *dev)
{
u32 avg, peak;
int i, ret;
......@@ -733,7 +815,7 @@ static int _set_opp_bw(const struct opp_table *opp_table,
return 0;
for (i = 0; i < opp_table->path_count; i++) {
if (remove) {
if (!opp) {
avg = 0;
peak = 0;
} else {
......@@ -743,7 +825,7 @@ static int _set_opp_bw(const struct opp_table *opp_table,
ret = icc_set_bw(opp_table->paths[i], avg, peak);
if (ret) {
dev_err(dev, "Failed to %s bandwidth[%d]: %d\n",
remove ? "remove" : "set", i, ret);
opp ? "set" : "remove", i, ret);
return ret;
}
}
......@@ -752,29 +834,31 @@ static int _set_opp_bw(const struct opp_table *opp_table,
}
static int _set_opp_custom(const struct opp_table *opp_table,
struct device *dev, unsigned long old_freq,
unsigned long freq,
struct dev_pm_opp_supply *old_supply,
struct dev_pm_opp_supply *new_supply)
struct device *dev, struct dev_pm_opp *opp,
unsigned long freq)
{
struct dev_pm_set_opp_data *data;
struct dev_pm_set_opp_data *data = opp_table->set_opp_data;
struct dev_pm_opp *old_opp = opp_table->current_opp;
int size;
data = opp_table->set_opp_data;
/*
* We support this only if dev_pm_opp_set_regulators() was called
* earlier.
*/
if (opp_table->sod_supplies) {
size = sizeof(*old_opp->supplies) * opp_table->regulator_count;
memcpy(data->old_opp.supplies, old_opp->supplies, size);
memcpy(data->new_opp.supplies, opp->supplies, size);
data->regulator_count = opp_table->regulator_count;
} else {
data->regulator_count = 0;
}
data->regulators = opp_table->regulators;
data->regulator_count = opp_table->regulator_count;
data->clk = opp_table->clk;
data->dev = dev;
data->old_opp.rate = old_freq;
size = sizeof(*old_supply) * opp_table->regulator_count;
if (!old_supply)
memset(data->old_opp.supplies, 0, size);
else
memcpy(data->old_opp.supplies, old_supply, size);
data->old_opp.rate = old_opp->rate;
data->new_opp.rate = freq;
memcpy(data->new_opp.supplies, new_supply, size);
return opp_table->set_opp(data);
}
......@@ -809,6 +893,10 @@ static int _set_required_opps(struct device *dev,
if (!required_opp_tables)
return 0;
/* required-opps not fully initialized yet */
if (lazy_linking_pending(opp_table))
return -EBUSY;
/* Single genpd case */
if (!genpd_virt_devs)
return _set_required_opp(dev, dev, opp, 0);
......@@ -841,38 +929,32 @@ static int _set_required_opps(struct device *dev,
return ret;
}
/**
* dev_pm_opp_set_bw() - sets bandwidth levels corresponding to an opp
* @dev: device for which we do this operation
* @opp: opp based on which the bandwidth levels are to be configured
*
* This configures the bandwidth to the levels specified by the OPP. However
* if the OPP specified is NULL the bandwidth levels are cleared out.
*
* Return: 0 on success or a negative error value.
*/
int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
static void _find_current_opp(struct device *dev, struct opp_table *opp_table)
{
struct opp_table *opp_table;
int ret;
struct dev_pm_opp *opp = ERR_PTR(-ENODEV);
unsigned long freq;
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
dev_err(dev, "%s: device opp table doesn't exist\n", __func__);
return PTR_ERR(opp_table);
if (!IS_ERR(opp_table->clk)) {
freq = clk_get_rate(opp_table->clk);
opp = _find_freq_ceil(opp_table, &freq);
}
if (opp)
ret = _set_opp_bw(opp_table, opp, dev, false);
else
ret = _set_opp_bw(opp_table, NULL, dev, true);
/*
* Unable to find the current OPP ? Pick the first from the list since
* it is in ascending order, otherwise rest of the code will need to
* make special checks to validate current_opp.
*/
if (IS_ERR(opp)) {
mutex_lock(&opp_table->lock);
opp = list_first_entry(&opp_table->opp_list, struct dev_pm_opp, node);
dev_pm_opp_get(opp);
mutex_unlock(&opp_table->lock);
}
dev_pm_opp_put_opp_table(opp_table);
return ret;
opp_table->current_opp = opp;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_bw);
static int _opp_set_rate_zero(struct device *dev, struct opp_table *opp_table)
static int _disable_opp_table(struct device *dev, struct opp_table *opp_table)
{
int ret;
......@@ -887,7 +969,7 @@ static int _opp_set_rate_zero(struct device *dev, struct opp_table *opp_table)
if (!_get_opp_count(opp_table))
return 0;
ret = _set_opp_bw(opp_table, NULL, dev, true);
ret = _set_opp_bw(opp_table, NULL, dev);
if (ret)
return ret;
......@@ -900,6 +982,89 @@ static int _opp_set_rate_zero(struct device *dev, struct opp_table *opp_table)
return ret;
}
static int _set_opp(struct device *dev, struct opp_table *opp_table,
struct dev_pm_opp *opp, unsigned long freq)
{
struct dev_pm_opp *old_opp;
int scaling_down, ret;
if (unlikely(!opp))
return _disable_opp_table(dev, opp_table);
/* Find the currently set OPP if we don't know already */
if (unlikely(!opp_table->current_opp))
_find_current_opp(dev, opp_table);
old_opp = opp_table->current_opp;
/* Return early if nothing to do */
if (opp_table->enabled && old_opp == opp) {
dev_dbg(dev, "%s: OPPs are same, nothing to do\n", __func__);
return 0;
}
dev_dbg(dev, "%s: switching OPP: Freq %lu -> %lu Hz, Level %u -> %u, Bw %u -> %u\n",
__func__, old_opp->rate, freq, old_opp->level, opp->level,
old_opp->bandwidth ? old_opp->bandwidth[0].peak : 0,
opp->bandwidth ? opp->bandwidth[0].peak : 0);
scaling_down = _opp_compare_key(old_opp, opp);
if (scaling_down == -1)
scaling_down = 0;
/* Scaling up? Configure required OPPs before frequency */
if (!scaling_down) {
ret = _set_required_opps(dev, opp_table, opp, true);
if (ret) {
dev_err(dev, "Failed to set required opps: %d\n", ret);
return ret;
}
ret = _set_opp_bw(opp_table, opp, dev);
if (ret) {
dev_err(dev, "Failed to set bw: %d\n", ret);
return ret;
}
}
if (opp_table->set_opp) {
ret = _set_opp_custom(opp_table, dev, opp, freq);
} else if (opp_table->regulators) {
ret = _generic_set_opp_regulator(opp_table, dev, opp, freq,
scaling_down);
} else {
/* Only frequency scaling */
ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq);
}
if (ret)
return ret;
/* Scaling down? Configure required OPPs after frequency */
if (scaling_down) {
ret = _set_opp_bw(opp_table, opp, dev);
if (ret) {
dev_err(dev, "Failed to set bw: %d\n", 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);
return ret;
}
}
opp_table->enabled = true;
dev_pm_opp_put(old_opp);
/* Make sure current_opp doesn't get freed */
dev_pm_opp_get(opp);
opp_table->current_opp = opp;
return ret;
}
/**
* dev_pm_opp_set_rate() - Configure new OPP based on frequency
* @dev: device for which we do this operation
......@@ -914,118 +1079,85 @@ static int _opp_set_rate_zero(struct device *dev, struct opp_table *opp_table)
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
{
struct opp_table *opp_table;
unsigned long freq, old_freq, temp_freq;
struct dev_pm_opp *old_opp, *opp;
struct clk *clk;
unsigned long freq = 0, temp_freq;
struct dev_pm_opp *opp = NULL;
int ret;
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
dev_err(dev, "%s: device opp doesn't exist\n", __func__);
dev_err(dev, "%s: device's opp table doesn't exist\n", __func__);
return PTR_ERR(opp_table);
}
if (unlikely(!target_freq)) {
ret = _opp_set_rate_zero(dev, opp_table);
goto put_opp_table;
}
clk = opp_table->clk;
if (IS_ERR(clk)) {
dev_err(dev, "%s: No clock available for the device\n",
__func__);
ret = PTR_ERR(clk);
goto put_opp_table;
}
freq = clk_round_rate(clk, target_freq);
if ((long)freq <= 0)
freq = target_freq;
old_freq = clk_get_rate(clk);
/* Return early if nothing to do */
if (opp_table->enabled && old_freq == freq) {
dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
__func__, freq);
ret = 0;
goto put_opp_table;
}
/*
* For IO devices which require an OPP on some platforms/SoCs
* while just needing to scale the clock on some others
* we look for empty OPP tables with just a clock handle and
* scale only the clk. This makes dev_pm_opp_set_rate()
* equivalent to a clk_set_rate()
*/
if (!_get_opp_count(opp_table)) {
ret = _generic_set_opp_clk_only(dev, clk, freq);
goto put_opp_table;
}
if (target_freq) {
/*
* For IO devices which require an OPP on some platforms/SoCs
* while just needing to scale the clock on some others
* we look for empty OPP tables with just a clock handle and
* scale only the clk. This makes dev_pm_opp_set_rate()
* equivalent to a clk_set_rate()
*/
if (!_get_opp_count(opp_table)) {
ret = _generic_set_opp_clk_only(dev, opp_table->clk, target_freq);
goto put_opp_table;
}
temp_freq = old_freq;
old_opp = _find_freq_ceil(opp_table, &temp_freq);
if (IS_ERR(old_opp)) {
dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n",
__func__, old_freq, PTR_ERR(old_opp));
}
freq = clk_round_rate(opp_table->clk, target_freq);
if ((long)freq <= 0)
freq = target_freq;
temp_freq = freq;
opp = _find_freq_ceil(opp_table, &temp_freq);
if (IS_ERR(opp)) {
ret = PTR_ERR(opp);
dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
__func__, freq, ret);
goto put_old_opp;
/*
* The clock driver may support finer resolution of the
* frequencies than the OPP table, don't update the frequency we
* pass to clk_set_rate() here.
*/
temp_freq = freq;
opp = _find_freq_ceil(opp_table, &temp_freq);
if (IS_ERR(opp)) {
ret = PTR_ERR(opp);
dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
__func__, freq, ret);
goto put_opp_table;
}
}
dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__,
old_freq, freq);
ret = _set_opp(dev, opp_table, opp, freq);
/* Scaling up? Configure required OPPs before frequency */
if (freq >= old_freq) {
ret = _set_required_opps(dev, opp_table, opp, true);
if (ret)
goto put_opp;
}
if (opp_table->set_opp) {
ret = _set_opp_custom(opp_table, dev, old_freq, freq,
IS_ERR(old_opp) ? NULL : old_opp->supplies,
opp->supplies);
} else if (opp_table->regulators) {
ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq,
IS_ERR(old_opp) ? NULL : old_opp->supplies,
opp->supplies);
} else {
/* Only frequency scaling */
ret = _generic_set_opp_clk_only(dev, clk, freq);
}
if (target_freq)
dev_pm_opp_put(opp);
put_opp_table:
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
/* Scaling down? Configure required OPPs after frequency */
if (!ret && freq < old_freq) {
ret = _set_required_opps(dev, opp_table, opp, false);
if (ret)
dev_err(dev, "Failed to set required opps: %d\n", ret);
}
/**
* dev_pm_opp_set_opp() - Configure device for OPP
* @dev: device for which we do this operation
* @opp: OPP to set to
*
* This configures the device based on the properties of the OPP passed to this
* routine.
*
* Return: 0 on success, a negative error number otherwise.
*/
int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)
{
struct opp_table *opp_table;
int ret;
if (!ret) {
ret = _set_opp_bw(opp_table, opp, dev, false);
if (!ret)
opp_table->enabled = true;
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
dev_err(dev, "%s: device opp doesn't exist\n", __func__);
return PTR_ERR(opp_table);
}
put_opp:
dev_pm_opp_put(opp);
put_old_opp:
if (!IS_ERR(old_opp))
dev_pm_opp_put(old_opp);
put_opp_table:
ret = _set_opp(dev, opp_table, opp, opp ? opp->rate : 0);
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp);
/* OPP-dev Helpers */
static void _remove_opp_dev(struct opp_device *opp_dev,
......@@ -1075,6 +1207,7 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
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);
/* Mark regulator count uninitialized */
opp_table->regulator_count = -1;
......@@ -1087,21 +1220,11 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
_of_init_opp_table(opp_table, dev, index);
/* Find clk for the device */
opp_table->clk = clk_get(dev, NULL);
if (IS_ERR(opp_table->clk)) {
ret = PTR_ERR(opp_table->clk);
if (ret == -EPROBE_DEFER)
goto remove_opp_dev;
dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
}
/* Find interconnect path(s) for the device */
ret = dev_pm_opp_of_find_icc_paths(dev, opp_table);
if (ret) {
if (ret == -EPROBE_DEFER)
goto put_clk;
goto remove_opp_dev;
dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
__func__, ret);
......@@ -1113,9 +1236,6 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
return opp_table;
put_clk:
if (!IS_ERR(opp_table->clk))
clk_put(opp_table->clk);
remove_opp_dev:
_remove_opp_dev(opp_dev, opp_table);
err:
......@@ -1128,6 +1248,37 @@ 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)
{
int ret;
/*
* Return early if we don't need to get clk or we have already tried it
* earlier.
*/
if (!getclk || IS_ERR(opp_table) || opp_table->clk)
return opp_table;
/* Find clk for the device */
opp_table->clk = clk_get(dev, NULL);
ret = PTR_ERR_OR_ZERO(opp_table->clk);
if (!ret)
return opp_table;
if (ret == -ENOENT) {
dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
return opp_table;
}
dev_pm_opp_put_opp_table(opp_table);
dev_err_probe(dev, ret, "Couldn't find clock\n");
return ERR_PTR(ret);
}
/*
* We need to make sure that the OPP table for a device doesn't get added twice,
* if this routine gets called in parallel with the same device pointer.
......@@ -1143,7 +1294,8 @@ void _get_opp_table_kref(struct opp_table *opp_table)
* uses the opp_tables_busy flag to indicate if another creator is in the middle
* of adding an OPP table and others should wait for it to finish.
*/
struct opp_table *_add_opp_table_indexed(struct device *dev, int index)
struct opp_table *_add_opp_table_indexed(struct device *dev, int index,
bool getclk)
{
struct opp_table *opp_table;
......@@ -1190,12 +1342,12 @@ struct opp_table *_add_opp_table_indexed(struct device *dev, int index)
unlock:
mutex_unlock(&opp_table_lock);
return opp_table;
return _update_opp_table_clk(dev, opp_table, getclk);
}
struct opp_table *_add_opp_table(struct device *dev)
static struct opp_table *_add_opp_table(struct device *dev, bool getclk)
{
return _add_opp_table_indexed(dev, 0);
return _add_opp_table_indexed(dev, 0, getclk);
}
struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
......@@ -1214,6 +1366,9 @@ static void _opp_table_kref_release(struct kref *kref)
list_del(&opp_table->node);
mutex_unlock(&opp_table_lock);
if (opp_table->current_opp)
dev_pm_opp_put(opp_table->current_opp);
_of_clear_opp_table(opp_table);
/* Release clk */
......@@ -1508,6 +1663,21 @@ static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp,
return 0;
}
void _required_opps_available(struct dev_pm_opp *opp, int count)
{
int i;
for (i = 0; i < count; i++) {
if (opp->required_opps[i]->available)
continue;
opp->available = false;
pr_warn("%s: OPP not supported by required OPP %pOF (%lu)\n",
__func__, opp->required_opps[i]->np, opp->rate);
return;
}
}
/*
* Returns:
* 0: On success. And appropriate error message for duplicate OPPs.
......@@ -1527,12 +1697,10 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
mutex_lock(&opp_table->lock);
head = &opp_table->opp_list;
if (likely(!rate_not_available)) {
ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
if (ret) {
mutex_unlock(&opp_table->lock);
return ret;
}
ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
if (ret) {
mutex_unlock(&opp_table->lock);
return ret;
}
list_add(&new_opp->node, head);
......@@ -1549,6 +1717,12 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
__func__, new_opp->rate);
}
/* required-opps not fully initialized yet */
if (lazy_linking_pending(opp_table))
return 0;
_required_opps_available(new_opp, opp_table->required_opp_count);
return 0;
}
......@@ -1631,7 +1805,7 @@ struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
{
struct opp_table *opp_table;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -1693,7 +1867,7 @@ struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
{
struct opp_table *opp_table;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -1737,38 +1911,6 @@ void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
}
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(!opp_table->regulators))
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_regulators() - Set regulator names for the device
* @dev: Device for which regulator name is being set.
......@@ -1785,11 +1927,12 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
const char * const names[],
unsigned int count)
{
struct dev_pm_opp_supply *supplies;
struct opp_table *opp_table;
struct regulator *reg;
int ret, i;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -1826,10 +1969,19 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
opp_table->regulator_count = count;
/* Allocate block only once to pass to set_opp() routines */
ret = _allocate_set_opp_data(opp_table);
if (ret)
supplies = kmalloc_array(count * 2, sizeof(*supplies), GFP_KERNEL);
if (!supplies) {
ret = -ENOMEM;
goto free_regulators;
}
mutex_lock(&opp_table->lock);
opp_table->sod_supplies = supplies;
if (opp_table->set_opp_data) {
opp_table->set_opp_data->old_opp.supplies = supplies;
opp_table->set_opp_data->new_opp.supplies = supplies + count;
}
mutex_unlock(&opp_table->lock);
return opp_table;
......@@ -1872,7 +2024,15 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table)
for (i = opp_table->regulator_count - 1; i >= 0; i--)
regulator_put(opp_table->regulators[i]);
_free_set_opp_data(opp_table);
mutex_lock(&opp_table->lock);
if (opp_table->set_opp_data) {
opp_table->set_opp_data->old_opp.supplies = NULL;
opp_table->set_opp_data->new_opp.supplies = NULL;
}
kfree(opp_table->sod_supplies);
opp_table->sod_supplies = NULL;
mutex_unlock(&opp_table->lock);
kfree(opp_table->regulators);
opp_table->regulators = NULL;
......@@ -1900,7 +2060,7 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
struct opp_table *opp_table;
int ret;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -1910,9 +2070,11 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
goto err;
}
/* Already have default clk set, free it */
if (!IS_ERR(opp_table->clk))
clk_put(opp_table->clk);
/* clk shouldn't be initialized at this point */
if (WARN_ON(opp_table->clk)) {
ret = -EBUSY;
goto err;
}
/* Find clk for the device */
opp_table->clk = clk_get(dev, name);
......@@ -1966,12 +2128,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname);
struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
int (*set_opp)(struct dev_pm_set_opp_data *data))
{
struct dev_pm_set_opp_data *data;
struct opp_table *opp_table;
if (!set_opp)
return ERR_PTR(-EINVAL);
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -1982,8 +2145,23 @@ struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
}
/* Another CPU that shares the OPP table has set the helper ? */
if (!opp_table->set_opp)
opp_table->set_opp = set_opp;
if (opp_table->set_opp)
return opp_table;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return ERR_PTR(-ENOMEM);
mutex_lock(&opp_table->lock);
opp_table->set_opp_data = data;
if (opp_table->sod_supplies) {
data->old_opp.supplies = opp_table->sod_supplies;
data->new_opp.supplies = opp_table->sod_supplies +
opp_table->regulator_count;
}
mutex_unlock(&opp_table->lock);
opp_table->set_opp = set_opp;
return opp_table;
}
......@@ -2005,10 +2183,50 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table)
WARN_ON(!list_empty(&opp_table->opp_list));
opp_table->set_opp = NULL;
mutex_lock(&opp_table->lock);
kfree(opp_table->set_opp_data);
opp_table->set_opp_data = NULL;
mutex_unlock(&opp_table->lock);
dev_pm_opp_put_opp_table(opp_table);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_unregister_set_opp_helper);
static void devm_pm_opp_unregister_set_opp_helper(void *data)
{
dev_pm_opp_unregister_set_opp_helper(data);
}
/**
* devm_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 a resource-managed version of dev_pm_opp_register_set_opp_helper().
*
* Return: pointer to 'struct opp_table' on success and errorno otherwise.
*/
struct opp_table *
devm_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 err;
opp_table = dev_pm_opp_register_set_opp_helper(dev, set_opp);
if (IS_ERR(opp_table))
return opp_table;
err = devm_add_action_or_reset(dev, devm_pm_opp_unregister_set_opp_helper,
opp_table);
if (err)
return ERR_PTR(err);
return opp_table;
}
EXPORT_SYMBOL_GPL(devm_pm_opp_register_set_opp_helper);
static void _opp_detach_genpd(struct opp_table *opp_table)
{
int index;
......@@ -2058,7 +2276,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
int index = 0, ret = -EINVAL;
const char **name = names;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
return opp_table;
......@@ -2144,6 +2362,97 @@ void dev_pm_opp_detach_genpd(struct opp_table *opp_table)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd);
static void devm_pm_opp_detach_genpd(void *data)
{
dev_pm_opp_detach_genpd(data);
}
/**
* devm_pm_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.
*
* This is a resource-managed version of dev_pm_opp_attach_genpd().
*
* Return: pointer to 'struct opp_table' on success and errorno otherwise.
*/
struct opp_table *
devm_pm_opp_attach_genpd(struct device *dev, const char **names,
struct device ***virt_devs)
{
struct opp_table *opp_table;
int err;
opp_table = dev_pm_opp_attach_genpd(dev, names, virt_devs);
if (IS_ERR(opp_table))
return opp_table;
err = devm_add_action_or_reset(dev, devm_pm_opp_detach_genpd,
opp_table);
if (err)
return ERR_PTR(err);
return opp_table;
}
EXPORT_SYMBOL_GPL(devm_pm_opp_attach_genpd);
/**
* dev_pm_opp_xlate_required_opp() - Find required OPP for @src_table OPP.
* @src_table: OPP table which has @dst_table as one of its required OPP table.
* @dst_table: Required OPP table of the @src_table.
* @src_opp: OPP from the @src_table.
*
* This function returns the OPP (present in @dst_table) pointed out by the
* "required-opps" property of the @src_opp (present in @src_table).
*
* The callers are required to call dev_pm_opp_put() for the returned OPP after
* use.
*
* Return: pointer to 'struct dev_pm_opp' on success and errorno otherwise.
*/
struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table,
struct opp_table *dst_table,
struct dev_pm_opp *src_opp)
{
struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-ENODEV);
int i;
if (!src_table || !dst_table || !src_opp ||
!src_table->required_opp_tables)
return ERR_PTR(-EINVAL);
/* required-opps not fully initialized yet */
if (lazy_linking_pending(src_table))
return ERR_PTR(-EBUSY);
for (i = 0; i < src_table->required_opp_count; i++) {
if (src_table->required_opp_tables[i] == dst_table) {
mutex_lock(&src_table->lock);
list_for_each_entry(opp, &src_table->opp_list, node) {
if (opp == src_opp) {
dest_opp = opp->required_opps[i];
dev_pm_opp_get(dest_opp);
break;
}
}
mutex_unlock(&src_table->lock);
break;
}
}
if (IS_ERR(dest_opp)) {
pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__,
src_table, dst_table);
}
return dest_opp;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_xlate_required_opp);
/**
* dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table.
* @src_table: OPP table which has dst_table as one of its required OPP table.
......@@ -2172,9 +2481,13 @@ int dev_pm_opp_xlate_performance_state(struct opp_table *src_table,
* and so none of them have the "required-opps" property set. Return the
* pstate of the src_table as it is in such cases.
*/
if (!src_table->required_opp_count)
if (!src_table || !src_table->required_opp_count)
return pstate;
/* required-opps not fully initialized yet */
if (lazy_linking_pending(src_table))
return -EBUSY;
for (i = 0; i < src_table->required_opp_count; i++) {
if (src_table->required_opp_tables[i]->np == dst_table->np)
break;
......@@ -2226,7 +2539,7 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
struct opp_table *opp_table;
int ret;
opp_table = _add_opp_table(dev);
opp_table = _add_opp_table(dev, true);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
......@@ -2504,3 +2817,44 @@ void dev_pm_opp_remove_table(struct device *dev)
dev_pm_opp_put_opp_table(opp_table);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
/**
* dev_pm_opp_sync_regulators() - Sync state of voltage regulators
* @dev: device for which we do this operation
*
* Sync voltage state of the OPP table regulators.
*
* Return: 0 on success or a negative error value.
*/
int dev_pm_opp_sync_regulators(struct device *dev)
{
struct opp_table *opp_table;
struct regulator *reg;
int i, ret = 0;
/* Device may not have OPP table */
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table))
return 0;
/* Regulator may not be required for the device */
if (unlikely(!opp_table->regulators))
goto put_table;
/* Nothing to sync if voltage wasn't changed */
if (!opp_table->enabled)
goto put_table;
for (i = 0; i < opp_table->regulator_count; i++) {
reg = opp_table->regulators[i];
ret = regulator_sync_voltage(reg);
if (ret)
break;
}
put_table:
/* Drop reference taken by _find_opp_table() */
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators);
drivers/opp/of.c
View file @ f5c233c8
......@@ -144,7 +144,7 @@ static void _opp_table_free_required_tables(struct opp_table *opp_table)
for (i = 0; i < opp_table->required_opp_count; i++) {
if (IS_ERR_OR_NULL(required_opp_tables[i]))
break;
continue;
dev_pm_opp_put_opp_table(required_opp_tables[i]);
}
......@@ -153,6 +153,7 @@ static void _opp_table_free_required_tables(struct opp_table *opp_table)
opp_table->required_opp_count = 0;
opp_table->required_opp_tables = NULL;
list_del(&opp_table->lazy);
}
/*
......@@ -165,6 +166,7 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
{
struct opp_table **required_opp_tables;
struct device_node *required_np, *np;
bool lazy = false;
int count, i;
/* Traversing the first OPP node is all we need */
......@@ -195,8 +197,10 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
required_opp_tables[i] = _find_table_of_opp_np(required_np);
of_node_put(required_np);
if (IS_ERR(required_opp_tables[i]))
goto free_required_tables;
if (IS_ERR(required_opp_tables[i])) {
lazy = true;
continue;
}
/*
* We only support genpd's OPPs in the "required-opps" for now,
......@@ -210,6 +214,10 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
}
}
/* Let's do the linking later on */
if (lazy)
list_add(&opp_table->lazy, &lazy_opp_tables);
goto put_np;
free_required_tables:
......@@ -278,14 +286,14 @@ void _of_opp_free_required_opps(struct opp_table *opp_table,
for (i = 0; i < opp_table->required_opp_count; i++) {
if (!required_opps[i])
break;
continue;
/* Put the reference back */
dev_pm_opp_put(required_opps[i]);
}
kfree(required_opps);
opp->required_opps = NULL;
kfree(required_opps);
}
/* Populate all required OPPs which are part of "required-opps" list */
......@@ -309,6 +317,10 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
for (i = 0; i < count; i++) {
required_table = opp_table->required_opp_tables[i];
/* Required table not added yet, we will link later */
if (IS_ERR_OR_NULL(required_table))
continue;
np = of_parse_required_opp(opp->np, i);
if (unlikely(!np)) {
ret = -ENODEV;
......@@ -334,6 +346,104 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
return ret;
}
/* Link required OPPs for an individual OPP */
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;
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;
}
}
return 0;
}
/* Link required OPPs for all OPPs of the newly added OPP table */
static void lazy_link_required_opp_table(struct opp_table *new_table)
{
struct opp_table *opp_table, *temp, **required_opp_tables;
struct device_node *required_np, *opp_np, *required_table_np;
struct dev_pm_opp *opp;
int i, ret;
/*
* We only support genpd's OPPs in the "required-opps" for now,
* as we don't know much about other cases.
*/
if (!new_table->is_genpd)
return;
mutex_lock(&opp_table_lock);
list_for_each_entry_safe(opp_table, temp, &lazy_opp_tables, lazy) {
bool lazy = false;
/* opp_np can't be invalid here */
opp_np = of_get_next_available_child(opp_table->np, NULL);
for (i = 0; i < opp_table->required_opp_count; i++) {
required_opp_tables = opp_table->required_opp_tables;
/* Required opp-table is already parsed */
if (!IS_ERR(required_opp_tables[i]))
continue;
/* required_np can't be invalid here */
required_np = of_parse_required_opp(opp_np, i);
required_table_np = of_get_parent(required_np);
of_node_put(required_table_np);
of_node_put(required_np);
/*
* Newly added table isn't the required opp-table for
* opp_table.
*/
if (required_table_np != new_table->np) {
lazy = true;
continue;
}
required_opp_tables[i] = new_table;
_get_opp_table_kref(new_table);
/* Link OPPs now */
ret = lazy_link_required_opps(opp_table, new_table, i);
if (ret) {
/* The OPPs will be marked unusable */
lazy = false;
break;
}
}
of_node_put(opp_np);
/* All required opp-tables found, remove from lazy list */
if (!lazy) {
list_del(&opp_table->lazy);
INIT_LIST_HEAD(&opp_table->lazy);
list_for_each_entry(opp, &opp_table->opp_list, node)
_required_opps_available(opp, opp_table->required_opp_count);
}
}
mutex_unlock(&opp_table_lock);
}
static int _bandwidth_supported(struct device *dev, struct opp_table *opp_table)
{
struct device_node *np, *opp_np;
......@@ -755,7 +865,6 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
struct device *dev, struct device_node *np)
{
struct dev_pm_opp *new_opp;
u64 rate = 0;
u32 val;
int ret;
bool rate_not_available = false;
......@@ -772,7 +881,8 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
/* Check if the OPP supports hardware's hierarchy of versions or not */
if (!_opp_is_supported(dev, opp_table, np)) {
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
dev_dbg(dev, "OPP not supported by hardware: %lu\n",
new_opp->rate);
goto free_opp;
}
......@@ -822,10 +932,11 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu level:%u\n",
__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);
new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns,
new_opp->level);
/*
* Notify the changes in the availability of the operable
......@@ -888,6 +999,8 @@ static int _of_add_opp_table_v2(struct device *dev, struct opp_table *opp_table)
}
}
lazy_link_required_opp_table(opp_table);
return 0;
remove_static_opp:
......@@ -956,29 +1069,23 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
return ret;
}
/**
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
* @dev: device pointer used to lookup OPP table.
*
* Register the initial OPP table with the OPP library for given device.
*
* Return:
* 0 On success OR
* Duplicate OPPs (both freq and volt are same) and opp->available
* -EEXIST Freq are same and volt are different OR
* Duplicate OPPs (both freq and volt are same) and !opp->available
* -ENOMEM Memory allocation failure
* -ENODEV when 'operating-points' property is not found or is invalid data
* in device node.
* -ENODATA when empty 'operating-points' property is found
* -EINVAL when invalid entries are found in opp-v2 table
*/
int dev_pm_opp_of_add_table(struct device *dev)
static int _of_add_table_indexed(struct device *dev, int index, bool getclk)
{
struct opp_table *opp_table;
int ret;
int ret, count;
opp_table = _add_opp_table_indexed(dev, 0);
if (index) {
/*
* If only one phandle is present, then the same OPP table
* applies for all index requests.
*/
count = of_count_phandle_with_args(dev->of_node,
"operating-points-v2", NULL);
if (count == 1)
index = 0;
}
opp_table = _add_opp_table_indexed(dev, index, getclk);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
......@@ -996,15 +1103,12 @@ int dev_pm_opp_of_add_table(struct device *dev)
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
/**
* dev_pm_opp_of_add_table_indexed() - Initialize indexed opp table from device tree
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
* @dev: device pointer used to lookup OPP table.
* @index: Index number.
*
* Register the initial OPP table with the OPP library for given device only
* using the "operating-points-v2" property.
* Register the initial OPP table with the OPP library for given device.
*
* Return:
* 0 On success OR
......@@ -1017,34 +1121,46 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
* -ENODATA when empty 'operating-points' property is found
* -EINVAL when invalid entries are found in opp-v2 table
*/
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
int dev_pm_opp_of_add_table(struct device *dev)
{
struct opp_table *opp_table;
int ret, count;
if (index) {
/*
* If only one phandle is present, then the same OPP table
* applies for all index requests.
*/
count = of_count_phandle_with_args(dev->of_node,
"operating-points-v2", NULL);
if (count == 1)
index = 0;
}
opp_table = _add_opp_table_indexed(dev, index);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
ret = _of_add_opp_table_v2(dev, opp_table);
if (ret)
dev_pm_opp_put_opp_table(opp_table);
return _of_add_table_indexed(dev, 0, true);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
return ret;
/**
* dev_pm_opp_of_add_table_indexed() - Initialize indexed opp table from device tree
* @dev: device pointer used to lookup OPP table.
* @index: Index number.
*
* Register the initial OPP table with the OPP library for given device only
* using the "operating-points-v2" property.
*
* Return: Refer to dev_pm_opp_of_add_table() for return values.
*/
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
return _of_add_table_indexed(dev, index, true);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_indexed);
/**
* dev_pm_opp_of_add_table_noclk() - Initialize indexed opp table from device
* tree without getting clk for device.
* @dev: device pointer used to lookup OPP table.
* @index: Index number.
*
* Register the initial OPP table with the OPP library for given device only
* using the "operating-points-v2" property. Do not try to get the clk for the
* device.
*
* Return: Refer to dev_pm_opp_of_add_table() for return values.
*/
int dev_pm_opp_of_add_table_noclk(struct device *dev, int index)
{
return _of_add_table_indexed(dev, index, false);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_noclk);
/* CPU device specific helpers */
/**
......
drivers/opp/opp.h
View file @ f5c233c8
......@@ -26,7 +26,7 @@ struct regulator;
/* Lock to allow exclusive modification to the device and opp lists */
extern struct mutex opp_table_lock;
extern struct list_head opp_tables;
extern struct list_head opp_tables, lazy_opp_tables;
/*
* Internal data structure organization with the OPP layer library is as
......@@ -135,6 +135,7 @@ enum opp_table_access {
* @clock_latency_ns_max: Max clock latency in nanoseconds.
* @parsed_static_opps: Count of devices for which OPPs are initialized from DT.
* @shared_opp: OPP is shared between multiple devices.
* @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.
......@@ -155,6 +156,7 @@ enum opp_table_access {
* @genpd_performance_state: Device's power domain support performance state.
* @is_genpd: Marks if the OPP table belongs to a genpd.
* @set_opp: Platform specific set_opp callback
* @sod_supplies: Set opp data supplies
* @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.
......@@ -166,7 +168,7 @@ enum opp_table_access {
* meant for book keeping and private to OPP library.
*/
struct opp_table {
struct list_head node;
struct list_head node, lazy;
struct blocking_notifier_head head;
struct list_head dev_list;
......@@ -182,6 +184,7 @@ struct opp_table {
unsigned int parsed_static_opps;
enum opp_table_access shared_opp;
struct dev_pm_opp *current_opp;
struct dev_pm_opp *suspend_opp;
struct mutex genpd_virt_dev_lock;
......@@ -202,6 +205,7 @@ struct opp_table {
bool is_genpd;
int (*set_opp)(struct dev_pm_set_opp_data *data);
struct dev_pm_opp_supply *sod_supplies;
struct dev_pm_set_opp_data *set_opp_data;
#ifdef CONFIG_DEBUG_FS
......@@ -223,9 +227,14 @@ int _opp_compare_key(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, bool rate_not_available);
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, int last_cpu);
struct opp_table *_add_opp_table(struct device *dev);
struct opp_table *_add_opp_table_indexed(struct device *dev, int index);
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);
static inline bool lazy_linking_pending(struct opp_table *opp_table)
{
return unlikely(!list_empty(&opp_table->lazy));
}
#ifdef CONFIG_OF
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index);
......
include/linux/devfreq.h
View file @ f5c233c8
......@@ -137,6 +137,7 @@ struct devfreq_stats {
* using devfreq.
* @profile: device-specific devfreq profile
* @governor: method how to choose frequency based on the usage.
* @opp_table: Reference to OPP table of dev.parent, if one exists.
* @nb: notifier block used to notify devfreq object that it should
* reevaluate operable frequencies. Devfreq users may use
* devfreq.nb to the corresponding register notifier call chain.
......@@ -173,6 +174,7 @@ struct devfreq {
struct device dev;
struct devfreq_dev_profile *profile;
const struct devfreq_governor *governor;
struct opp_table *opp_table;
struct notifier_block nb;
struct delayed_work work;
......
include/linux/pm_opp.h
View file @ f5c233c8
......@@ -98,6 +98,9 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index);
bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
int dev_pm_opp_get_opp_count(struct device *dev);
......@@ -111,6 +114,8 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
bool available);
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level);
struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
unsigned int *level);
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);
......@@ -143,28 +148,32 @@ struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
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);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
void dev_pm_opp_put_clkname(struct opp_table *opp_table);
struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
struct opp_table *devm_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs);
void dev_pm_opp_detach_genpd(struct opp_table *opp_table);
struct opp_table *devm_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs);
struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, struct opp_table *dst_table, struct dev_pm_opp *src_opp);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp);
int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp);
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);
void dev_pm_opp_remove_table(struct device *dev);
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_sync_regulators(struct device *dev);
#else
static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev, int index)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}
......@@ -184,6 +193,13 @@ static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
return 0;
}
static inline
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index)
{
return 0;
}
static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
{
return false;
......@@ -217,31 +233,37 @@ static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq, bool available)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
unsigned int *level)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
unsigned long u_volt)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
......@@ -249,7 +271,7 @@ static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
unsigned long u_volt)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
......@@ -280,19 +302,19 @@ static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
static inline int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
const u32 *versions,
unsigned int count)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {}
......@@ -300,57 +322,76 @@ static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {}
static inline struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
int (*set_opp)(struct dev_pm_set_opp_data *data))
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) {}
static inline struct opp_table *
devm_pm_opp_register_set_opp_helper(struct device *dev,
int (*set_opp)(struct dev_pm_set_opp_data *data))
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name)
static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {}
static inline struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs)
{
return ERR_PTR(-ENOTSUPP);
return ERR_PTR(-EOPNOTSUPP);
}
static inline void dev_pm_opp_detach_genpd(struct opp_table *opp_table) {}
static inline struct opp_table *devm_pm_opp_attach_genpd(struct device *dev,
const char **names, struct device ***virt_devs)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table,
struct opp_table *dst_table, struct dev_pm_opp *src_opp)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
static inline int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)
{
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
......@@ -366,11 +407,17 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask
{
}
static inline int dev_pm_opp_sync_regulators(struct device *dev)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_PM_OPP */
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int dev_pm_opp_of_add_table(struct device *dev);
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
int dev_pm_opp_of_add_table_noclk(struct device *dev, int index);
void dev_pm_opp_of_remove_table(struct device *dev);
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
......@@ -387,12 +434,17 @@ static inline void dev_pm_opp_of_unregister_em(struct device *dev)
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_of_add_table_noclk(struct device *dev, int index)
{
return -EOPNOTSUPP;
}
static inline void dev_pm_opp_of_remove_table(struct device *dev)
......@@ -401,7 +453,7 @@ static inline void dev_pm_opp_of_remove_table(struct device *dev)
static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
......@@ -410,7 +462,7 @@ static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpum
static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
......@@ -426,7 +478,7 @@ static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
static inline int dev_pm_opp_of_register_em(struct device *dev,
struct cpumask *cpus)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline void dev_pm_opp_of_unregister_em(struct device *dev)
......@@ -435,12 +487,12 @@ static inline void dev_pm_opp_of_unregister_em(struct device *dev)
static inline int of_get_required_opp_performance_state(struct device_node *np, int index)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table)
{
return -ENOTSUPP;
return -EOPNOTSUPP;
}
#endif
......
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