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4dab160eb1
The generic set_opp() handler isn't sufficient for platforms with complex DVFS. For example, some TI platforms have multiple regulators for a CPU device. The order in which various supplies need to be programmed is only known to the platform code and its best to leave it to it. This patch implements APIs to register platform specific set_opp() callback. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dave Gerlach <d-gerlach@ti.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
298 lines
8 KiB
C
298 lines
8 KiB
C
/*
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* Generic OPP Interface
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*
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* Copyright (C) 2009-2010 Texas Instruments Incorporated.
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* Nishanth Menon
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* Romit Dasgupta
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* Kevin Hilman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __LINUX_OPP_H__
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#define __LINUX_OPP_H__
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#include <linux/err.h>
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#include <linux/notifier.h>
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struct clk;
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struct regulator;
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struct dev_pm_opp;
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struct device;
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struct opp_table;
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enum dev_pm_opp_event {
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OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
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};
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/**
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* struct dev_pm_opp_supply - Power supply voltage/current values
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* @u_volt: Target voltage in microvolts corresponding to this OPP
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* @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
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* @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
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* @u_amp: Maximum current drawn by the device in microamperes
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*
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* This structure stores the voltage/current values for a single power supply.
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*/
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struct dev_pm_opp_supply {
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unsigned long u_volt;
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unsigned long u_volt_min;
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unsigned long u_volt_max;
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unsigned long u_amp;
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};
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/**
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* struct dev_pm_opp_info - OPP freq/voltage/current values
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* @rate: Target clk rate in hz
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* @supplies: Array of voltage/current values for all power supplies
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*
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* This structure stores the freq/voltage/current values for a single OPP.
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*/
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struct dev_pm_opp_info {
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unsigned long rate;
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struct dev_pm_opp_supply *supplies;
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};
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/**
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* struct dev_pm_set_opp_data - Set OPP data
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* @old_opp: Old OPP info
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* @new_opp: New OPP info
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* @regulators: Array of regulator pointers
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* @regulator_count: Number of regulators
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* @clk: Pointer to clk
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* @dev: Pointer to the struct device
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*
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* This structure contains all information required for setting an OPP.
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*/
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struct dev_pm_set_opp_data {
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struct dev_pm_opp_info old_opp;
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struct dev_pm_opp_info new_opp;
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struct regulator **regulators;
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unsigned int regulator_count;
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struct clk *clk;
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struct device *dev;
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};
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#if defined(CONFIG_PM_OPP)
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unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
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unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
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bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
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int dev_pm_opp_get_opp_count(struct device *dev);
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unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
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unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
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unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
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struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
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struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
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unsigned long freq,
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bool available);
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struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
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unsigned long *freq);
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struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
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unsigned long *freq);
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int dev_pm_opp_add(struct device *dev, unsigned long freq,
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unsigned long u_volt);
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void dev_pm_opp_remove(struct device *dev, unsigned long freq);
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int dev_pm_opp_enable(struct device *dev, unsigned long freq);
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int dev_pm_opp_disable(struct device *dev, unsigned long freq);
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struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
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int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
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unsigned int count);
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void dev_pm_opp_put_supported_hw(struct device *dev);
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int dev_pm_opp_set_prop_name(struct device *dev, const char *name);
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void dev_pm_opp_put_prop_name(struct device *dev);
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struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
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void dev_pm_opp_put_regulators(struct opp_table *opp_table);
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int dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
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void dev_pm_opp_register_put_opp_helper(struct device *dev);
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int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
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int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
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int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
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void dev_pm_opp_remove_table(struct device *dev);
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void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
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#else
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static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
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{
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return 0;
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}
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static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
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{
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return 0;
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}
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static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
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{
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return false;
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}
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static inline int dev_pm_opp_get_opp_count(struct device *dev)
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{
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return 0;
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}
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static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
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{
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return 0;
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}
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static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
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{
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return 0;
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}
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static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
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{
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return 0;
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}
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static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
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{
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return NULL;
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}
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static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
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unsigned long freq, bool available)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
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unsigned long *freq)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
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unsigned long *freq)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
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unsigned long u_volt)
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
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{
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}
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static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
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{
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return 0;
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}
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static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
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{
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return 0;
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}
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static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
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struct device *dev)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline int dev_pm_opp_set_supported_hw(struct device *dev,
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const u32 *versions,
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unsigned int count)
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
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static inline int dev_pm_opp_register_set_opp_helper(struct device *dev,
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int (*set_opp)(struct dev_pm_set_opp_data *data))
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_register_put_opp_helper(struct device *dev) {}
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static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
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static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
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static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
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{
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return -ENOTSUPP;
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}
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static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
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{
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return -ENOTSUPP;
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}
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static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
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{
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return -EINVAL;
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}
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static inline void dev_pm_opp_remove_table(struct device *dev)
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{
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}
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static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
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{
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}
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#endif /* CONFIG_PM_OPP */
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#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
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int dev_pm_opp_of_add_table(struct device *dev);
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void dev_pm_opp_of_remove_table(struct device *dev);
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int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
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void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
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int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
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#else
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static inline int dev_pm_opp_of_add_table(struct device *dev)
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_of_remove_table(struct device *dev)
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{
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}
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static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
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{
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return -ENOTSUPP;
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}
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static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
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{
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}
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static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
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{
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return -ENOTSUPP;
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}
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#endif
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#endif /* __LINUX_OPP_H__ */
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