diff options
Diffstat (limited to 'drivers/opp')
| -rw-r--r-- | drivers/opp/core.c | 57 | ||||
| -rw-r--r-- | drivers/opp/debugfs.c | 3 | ||||
| -rw-r--r-- | drivers/opp/opp.h | 4 |
3 files changed, 63 insertions, 1 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 80c21207e48c..0ce8069d6843 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #include <linux/device.h> #include <linux/export.h> +#include <linux/pm_domain.h> #include <linux/regulator/consumer.h> #include "opp.h" @@ -535,6 +536,44 @@ _generic_set_opp_clk_only(struct device *dev, struct clk *clk, return ret; } +static inline int +_generic_set_opp_domain(struct device *dev, struct clk *clk, + unsigned long old_freq, unsigned long freq, + unsigned int old_pstate, unsigned int new_pstate) +{ + int ret; + + /* Scaling up? Scale domain performance state before frequency */ + if (freq > old_freq) { + ret = dev_pm_genpd_set_performance_state(dev, new_pstate); + if (ret) + return ret; + } + + ret = _generic_set_opp_clk_only(dev, clk, old_freq, freq); + if (ret) + goto restore_domain_state; + + /* Scaling down? Scale domain performance state after frequency */ + if (freq < old_freq) { + ret = dev_pm_genpd_set_performance_state(dev, new_pstate); + if (ret) + goto restore_freq; + } + + return 0; + +restore_freq: + if (_generic_set_opp_clk_only(dev, clk, freq, old_freq)) + dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n", + __func__, old_freq); +restore_domain_state: + if (freq > old_freq) + dev_pm_genpd_set_performance_state(dev, old_pstate); + + return ret; +} + static int _generic_set_opp_regulator(const struct opp_table *opp_table, struct device *dev, unsigned long old_freq, @@ -653,7 +692,16 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) /* Only frequency scaling */ if (!opp_table->regulators) { - ret = _generic_set_opp_clk_only(dev, clk, old_freq, freq); + /* + * We don't support devices with both regulator and + * domain performance-state for now. + */ + if (opp_table->genpd_performance_state) + ret = _generic_set_opp_domain(dev, clk, old_freq, freq, + IS_ERR(old_opp) ? 0 : old_opp->pstate, + opp->pstate); + else + ret = _generic_set_opp_clk_only(dev, clk, old_freq, freq); } else if (!opp_table->set_opp) { ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq, IS_ERR(old_opp) ? NULL : old_opp->supplies, @@ -1706,6 +1754,13 @@ void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, if (remove_all || !opp->dynamic) dev_pm_opp_put(opp); } + + /* + * The OPP table is getting removed, drop the performance state + * constraints. + */ + if (opp_table->genpd_performance_state) + dev_pm_genpd_set_performance_state(dev, 0); } else { _remove_opp_dev(_find_opp_dev(dev, opp_table), opp_table); } diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c index 9318848f3c67..b03c03576a62 100644 --- a/drivers/opp/debugfs.c +++ b/drivers/opp/debugfs.c @@ -99,6 +99,9 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend)) return -ENOMEM; + if (!debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate)) + return -ENOMEM; + if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate)) return -ENOMEM; diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h index 166eef990599..e8f767ab5814 100644 --- a/drivers/opp/opp.h +++ b/drivers/opp/opp.h @@ -58,6 +58,7 @@ extern struct list_head opp_tables; * @dynamic: not-created from static DT entries. * @turbo: true if turbo (boost) OPP * @suspend: true if suspend OPP + * @pstate: Device's power domain's performance state. * @rate: Frequency in hertz * @supplies: Power supplies voltage/current values * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's @@ -76,6 +77,7 @@ struct dev_pm_opp { bool dynamic; bool turbo; bool suspend; + unsigned int pstate; unsigned long rate; struct dev_pm_opp_supply *supplies; @@ -135,6 +137,7 @@ enum opp_table_access { * @clk: Device's clock handle * @regulators: Supply regulators * @regulator_count: Number of power supply regulators + * @genpd_performance_state: Device's power domain support performance state. * @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). @@ -170,6 +173,7 @@ struct opp_table { struct clk *clk; struct regulator **regulators; unsigned int regulator_count; + bool genpd_performance_state; int (*set_opp)(struct dev_pm_set_opp_data *data); struct dev_pm_set_opp_data *set_opp_data; |