diff options
Diffstat (limited to 'drivers/opp/opp.h')
| -rw-r--r-- | drivers/opp/opp.h | 135 |
1 files changed, 90 insertions, 45 deletions
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h index e24d81497375..9eba63e01a9e 100644 --- a/drivers/opp/opp.h +++ b/drivers/opp/opp.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Generic OPP Interface * @@ -5,16 +6,13 @@ * Nishanth Menon * Romit Dasgupta * Kevin Hilman - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #ifndef __DRIVER_OPP_H__ #define __DRIVER_OPP_H__ #include <linux/device.h> +#include <linux/interconnect.h> #include <linux/kernel.h> #include <linux/kref.h> #include <linux/list.h> @@ -30,6 +28,41 @@ extern struct mutex opp_table_lock; extern struct list_head opp_tables; +/* OPP Config flags */ +#define OPP_CONFIG_CLK BIT(0) +#define OPP_CONFIG_REGULATOR BIT(1) +#define OPP_CONFIG_REGULATOR_HELPER BIT(2) +#define OPP_CONFIG_PROP_NAME BIT(3) +#define OPP_CONFIG_SUPPORTED_HW BIT(4) +#define OPP_CONFIG_REQUIRED_DEV BIT(5) + +/** + * struct opp_config_data - data for set config operations + * @opp_table: OPP table + * @flags: OPP config flags + * @required_dev_index: The position in the array of required_devs + * + * This structure stores the OPP config information for each OPP table + * configuration by the callers. + */ +struct opp_config_data { + struct opp_table *opp_table; + unsigned int flags; + unsigned int required_dev_index; +}; + +/** + * struct dev_pm_opp_icc_bw - Interconnect bandwidth values + * @avg: Average bandwidth corresponding to this OPP (in icc units) + * @peak: Peak bandwidth corresponding to this OPP (in icc units) + * + * This structure stores the bandwidth values for a single interconnect path. + */ +struct dev_pm_opp_icc_bw { + u32 avg; + u32 peak; +}; + /* * Internal data structure organization with the OPP layer library is as * follows: @@ -58,9 +91,11 @@ 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 + * @removed: flag indicating that OPP's reference is dropped by OPP core. + * @rates: Frequencies in hertz + * @level: Performance level * @supplies: Power supplies voltage/current values + * @bandwidth: Interconnect bandwidth values * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's * frequency from any other OPP's frequency. * @required_opps: List of OPPs that are required by this OPP. @@ -78,10 +113,12 @@ struct dev_pm_opp { bool dynamic; bool turbo; bool suspend; - unsigned int pstate; - unsigned long rate; + bool removed; + unsigned long *rates; + unsigned int level; struct dev_pm_opp_supply *supplies; + struct dev_pm_opp_icc_bw *bandwidth; unsigned long clock_latency_ns; @@ -92,6 +129,7 @@ struct dev_pm_opp { #ifdef CONFIG_DEBUG_FS struct dentry *dentry; + const char *of_name; #endif }; @@ -128,30 +166,34 @@ enum opp_table_access { * @dev_list: list of devices that share these OPPs * @opp_list: table of opps * @kref: for reference count of the table. - * @list_kref: for reference count of the OPP list. * @lock: mutex protecting the opp_list and dev_list. * @np: struct device_node pointer for opp's DT node. * @clock_latency_ns_max: Max clock latency in nanoseconds. - * @parsed_static_opps: True if OPPs are initialized from DT. + * @parsed_static_opps: Count of devices for which OPPs are initialized from DT. * @shared_opp: OPP is shared between multiple devices. + * @current_rate_single_clk: Currently configured frequency for single clk. + * @current_opp: Currently configured OPP for the table. * @suspend_opp: Pointer to OPP to be used during device suspend. - * @genpd_virt_dev_lock: Mutex protecting the genpd virtual device pointers. - * @genpd_virt_devs: List of virtual devices for multiple genpd support. * @required_opp_tables: List of device OPP tables that are required by OPPs in * this table. + * @required_devs: List of devices for required OPP tables. * @required_opp_count: Number of required devices. * @supported_hw: Array of version number to support. * @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 + * @config_clks: Platform specific config_clks() callback. + * @clks: Device's clock handles, for multiple clocks. + * @clk: Device's clock handle, for single clock. + * @clk_count: Number of clocks. + * @config_regulators: Platform specific config_regulators() callback. * @regulators: Supply regulators * @regulator_count: Number of power supply regulators. Its value can be -1 * (uninitialized), 0 (no opp-microvolt property) or > 0 (has opp-microvolt * property). - * @genpd_performance_state: Device's power domain support performance state. + * @paths: Interconnect path handles + * @path_count: Number of interconnect paths + * @enabled: Set to true if the device's resources are enabled/configured. * @is_genpd: Marks if the OPP table belongs to a genpd. - * @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. * @@ -162,13 +204,12 @@ 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; struct list_head opp_list; struct kref kref; - struct kref list_kref; struct mutex lock; struct device_node *np; @@ -177,27 +218,31 @@ struct opp_table { /* For backward compatibility with v1 bindings */ unsigned int voltage_tolerance_v1; - bool parsed_static_opps; + unsigned int parsed_static_opps; enum opp_table_access shared_opp; + unsigned long current_rate_single_clk; + struct dev_pm_opp *current_opp; struct dev_pm_opp *suspend_opp; - struct mutex genpd_virt_dev_lock; - struct device **genpd_virt_devs; struct opp_table **required_opp_tables; + struct device **required_devs; unsigned int required_opp_count; unsigned int *supported_hw; unsigned int supported_hw_count; const char *prop_name; + config_clks_t config_clks; + struct clk **clks; struct clk *clk; + int clk_count; + config_regulators_t config_regulators; struct regulator **regulators; int regulator_count; - bool genpd_performance_state; + struct icc_path **paths; + unsigned int path_count; + bool enabled; bool is_genpd; - 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; char dentry_name[NAME_MAX]; @@ -205,49 +250,49 @@ struct opp_table { }; /* Routines internal to opp core */ -void dev_pm_opp_get(struct dev_pm_opp *opp); -void _opp_remove_all_static(struct opp_table *opp_table); -void _get_opp_table_kref(struct opp_table *opp_table); +bool _opp_remove_all_static(struct opp_table *opp_table); int _get_opp_count(struct opp_table *opp_table); struct opp_table *_find_opp_table(struct device *dev); struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table); -void _dev_pm_opp_find_and_remove_table(struct device *dev); struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table); void _opp_free(struct dev_pm_opp *opp); -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); +int _opp_compare_key(struct opp_table *opp_table, struct dev_pm_opp *opp1, struct dev_pm_opp *opp2); +int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table); +int _opp_add_v1(struct opp_table *opp_table, struct device *dev, struct dev_pm_opp_data *data, bool dynamic); void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, int last_cpu); -struct opp_table *_add_opp_table(struct device *dev); -void _put_opp_list_kref(struct opp_table *opp_table); +struct opp_table *_add_opp_table_indexed(struct device *dev, int index, bool getclk); +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); void _of_clear_opp_table(struct opp_table *opp_table); struct opp_table *_managed_opp(struct device *dev, int index); -void _of_opp_free_required_opps(struct opp_table *opp_table, - struct dev_pm_opp *opp); +void _of_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp); #else static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev, int index) {} static inline void _of_clear_opp_table(struct opp_table *opp_table) {} static inline struct opp_table *_managed_opp(struct device *dev, int index) { return NULL; } -static inline void _of_opp_free_required_opps(struct opp_table *opp_table, - struct dev_pm_opp *opp) {} +static inline void _of_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp) {} #endif #ifdef CONFIG_DEBUG_FS void opp_debug_remove_one(struct dev_pm_opp *opp); -int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table); -int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table); +void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table); +void opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table); void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table); #else static inline void opp_debug_remove_one(struct dev_pm_opp *opp) {} -static inline int opp_debug_create_one(struct dev_pm_opp *opp, - struct opp_table *opp_table) -{ return 0; } -static inline int opp_debug_register(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ return 0; } +static inline void opp_debug_create_one(struct dev_pm_opp *opp, + struct opp_table *opp_table) { } + +static inline void opp_debug_register(struct opp_device *opp_dev, + struct opp_table *opp_table) { } static inline void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table) |