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OPP: Provide a simple implementation to configure multiple clocks 

This provides a simple implementation to configure multiple clocks for a
device.

Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2022-06-10 12:37:25 +05:30
parent f123ea7451
commit 8174a3a613
2 changed files with 44 additions and 0 deletions
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34
drivers/opp/core.c
View File

@ -843,6 +843,40 @@ _opp_config_clk_single(struct device *dev, struct opp_table *opp_table,
return ret;
}
/*
* Simple implementation for configuring multiple clocks. Configure clocks in
* the order in which they are present in the array while scaling up.
*/
int dev_pm_opp_config_clks_simple(struct device *dev,
struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,
bool scaling_down)
{
int ret, i;
if (scaling_down) {
for (i = opp_table->clk_count - 1; i >= 0; i--) {
ret = clk_set_rate(opp_table->clks[i], opp->rates[i]);
if (ret) {
dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
ret);
return ret;
}
}
} else {
for (i = 0; i < opp_table->clk_count; i++) {
ret = clk_set_rate(opp_table->clks[i], opp->rates[i]);
if (ret) {
dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
ret);
return ret;
}
}
}
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_config_clks_simple);
static int _opp_config_regulator_single(struct device *dev,
struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp,
struct regulator **regulators, unsigned int count)

10
include/linux/pm_opp.h
View File

@ -159,6 +159,9 @@ int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb
int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
void dev_pm_opp_clear_config(int token);
int dev_pm_opp_config_clks_simple(struct device *dev,
struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,
bool scaling_down);
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);
@ -342,6 +345,13 @@ static inline int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_c
static inline void dev_pm_opp_clear_config(int token) {}
static inline int dev_pm_opp_config_clks_simple(struct device *dev,
struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,
bool scaling_down)
{
return -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)
{