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a649136b17
A typical code pattern for pm_clk_create() call is to call it in the _probe function and to call pm_clk_destroy() both from _probe error path and from _remove function. For some drivers the whole remove function would consist of the call to pm_remove_disable(). Add helper function to replace this bolierplate piece of code. Calling devm_pm_clk_create() removes the need for calling pm_clk_destroy() both in the probe()'s error path and in the remove() function. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20210731195034.979084-3-dmitry.baryshkov@linaro.org Acked-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#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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extern int devm_pm_clk_create(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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static inline int devm_pm_clk_create(struct device *dev)
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{
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return -EINVAL;
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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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