forked from mirrors/linux
498b5fdd40
Some drivers using the PM clocks framework need to add specific clocks from device-tree using a name by calling the functions of_clk_get_by_name() and then pm_clk_add_clk(). Rather than having drivers call both functions, add a helper function of_pm_clk_add_clk() that will call these functions so drivers can call a single function to add a specific clock from device-tree. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
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* pm_clock.h - Definitions and headers related to device clocks.
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*
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* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
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*
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* This file is released under the GPLv2.
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*/
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#ifndef _LINUX_PM_CLOCK_H
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#define _LINUX_PM_CLOCK_H
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#include <linux/device.h>
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#include <linux/notifier.h>
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struct pm_clk_notifier_block {
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struct notifier_block nb;
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struct dev_pm_domain *pm_domain;
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char *con_ids[];
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};
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struct clk;
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#ifdef CONFIG_PM
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extern int pm_clk_runtime_suspend(struct device *dev);
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extern int pm_clk_runtime_resume(struct device *dev);
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#define USE_PM_CLK_RUNTIME_OPS \
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.runtime_suspend = pm_clk_runtime_suspend, \
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.runtime_resume = pm_clk_runtime_resume,
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#else
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#define USE_PM_CLK_RUNTIME_OPS
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#endif
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#ifdef CONFIG_PM_CLK
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static inline bool pm_clk_no_clocks(struct device *dev)
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{
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return dev && dev->power.subsys_data
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&& list_empty(&dev->power.subsys_data->clock_list);
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}
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extern void pm_clk_init(struct device *dev);
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extern int pm_clk_create(struct device *dev);
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extern void pm_clk_destroy(struct device *dev);
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extern int pm_clk_add(struct device *dev, const char *con_id);
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extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
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extern int of_pm_clk_add_clk(struct device *dev, const char *name);
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extern int of_pm_clk_add_clks(struct device *dev);
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extern void pm_clk_remove(struct device *dev, const char *con_id);
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extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
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extern int pm_clk_suspend(struct device *dev);
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extern int pm_clk_resume(struct device *dev);
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#else
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static inline bool pm_clk_no_clocks(struct device *dev)
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{
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return true;
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}
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static inline void pm_clk_init(struct device *dev)
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{
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}
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static inline int pm_clk_create(struct device *dev)
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{
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return -EINVAL;
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}
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static inline void pm_clk_destroy(struct device *dev)
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{
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}
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static inline int pm_clk_add(struct device *dev, const char *con_id)
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{
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return -EINVAL;
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}
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static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
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{
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return -EINVAL;
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}
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static inline int of_pm_clk_add_clks(struct device *dev)
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{
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return -EINVAL;
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}
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static inline void pm_clk_remove(struct device *dev, const char *con_id)
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{
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}
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#define pm_clk_suspend NULL
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#define pm_clk_resume NULL
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static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
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{
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}
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#endif
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#ifdef CONFIG_HAVE_CLK
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extern void pm_clk_add_notifier(struct bus_type *bus,
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struct pm_clk_notifier_block *clknb);
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#else
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static inline void pm_clk_add_notifier(struct bus_type *bus,
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struct pm_clk_notifier_block *clknb)
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{
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}
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#endif
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#endif
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