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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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>#include <linux/limits.h>#include <linux/pm_opp.h>#include <linux/notifier.h>
struct clk;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;
/* 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: * opp_tables (root) * |- device 1 (represents voltage domain 1) * | |- opp 1 (availability, freq, voltage) * | |- opp 2 .. * ... ... * | `- opp n .. * |- device 2 (represents the next voltage domain) * ... * `- device m (represents mth voltage domain) * device 1, 2.. are represented by opp_table structure while each opp * is represented by the opp structure. */
/** * struct dev_pm_opp - Generic OPP description structure * @node: opp table node. The nodes are maintained throughout the lifetime * of boot. It is expected only an optimal set of OPPs are * added to the library by the SoC framework. * IMPORTANT: the opp nodes should be maintained in increasing * order. * @kref: for reference count of the OPP. * @available: true/false - marks if this OPP as available or not * @dynamic: not-created from static DT entries. * @turbo: true if turbo (boost) OPP * @suspend: true if suspend OPP * @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. * @opp_table: points back to the opp_table struct this opp belongs to * @np: OPP's device node. * @dentry: debugfs dentry pointer (per opp) * * This structure stores the OPP information for a given device. */struct dev_pm_opp { struct list_head node; struct kref kref;
bool available; bool dynamic; bool turbo; bool suspend; 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;
struct dev_pm_opp **required_opps; struct opp_table *opp_table;
struct device_node *np;
#ifdef CONFIG_DEBUG_FS struct dentry *dentry; const char *of_name;#endif};
/** * struct opp_device - devices managed by 'struct opp_table' * @node: list node * @dev: device to which the struct object belongs * @dentry: debugfs dentry pointer (per device) * * This is an internal data structure maintaining the devices that are managed * by 'struct opp_table'. */struct opp_device { struct list_head node; const struct device *dev;
#ifdef CONFIG_DEBUG_FS struct dentry *dentry;#endif};
enum opp_table_access { OPP_TABLE_ACCESS_UNKNOWN = 0, OPP_TABLE_ACCESS_EXCLUSIVE = 1, OPP_TABLE_ACCESS_SHARED = 2,};
/** * struct opp_table - Device opp structure * @node: table node - contains the devices with OPPs that * have been registered. Nodes once added are not modified in this * table. * @head: notifier head to notify the OPP availability changes. * @dev_list: list of devices that share these OPPs * @opp_list: table of opps * @kref: for reference count of the table. * @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: 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. * @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. * @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). * @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. * @dentry: debugfs dentry pointer of the real device directory (not links). * @dentry_name: Name of the real dentry. * * @voltage_tolerance_v1: In percentage, for v1 bindings only. * * This is an internal data structure maintaining the link to opps attached to * a device. This structure is not meant to be shared to users as it is * meant for book keeping and private to OPP library. */struct opp_table { struct list_head node, lazy;
struct blocking_notifier_head head; struct list_head dev_list; struct list_head opp_list; struct kref kref; struct mutex lock;
struct device_node *np; unsigned long clock_latency_ns_max;
/* For backward compatibility with v1 bindings */ unsigned int voltage_tolerance_v1;
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 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; struct icc_path **paths; unsigned int path_count; bool enabled; bool is_genpd;
#ifdef CONFIG_DEBUG_FS struct dentry *dentry; char dentry_name[NAME_MAX];#endif};
/* Routines internal to opp core */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);struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);void _opp_free(struct dev_pm_opp *opp);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_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_OFvoid _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_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp);#elsestatic 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_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp) {}#endif
#ifdef CONFIG_DEBUG_FSvoid opp_debug_remove_one(struct dev_pm_opp *opp);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);#elsestatic inline void opp_debug_remove_one(struct dev_pm_opp *opp) {}
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){ }#endif /* DEBUG_FS */
#endif /* __DRIVER_OPP_H__ */