diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/clk.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/clk.h | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/ANDROID_3.4.5/include/linux/clk.h b/ANDROID_3.4.5/include/linux/clk.h deleted file mode 100644 index b0252726..00000000 --- a/ANDROID_3.4.5/include/linux/clk.h +++ /dev/null @@ -1,281 +0,0 @@ -/* - * linux/include/linux/clk.h - * - * Copyright (C) 2004 ARM Limited. - * Written by Deep Blue Solutions Limited. - * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org> - * - * 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 __LINUX_CLK_H -#define __LINUX_CLK_H - -#include <linux/kernel.h> -#include <linux/notifier.h> - -struct device; - -struct clk; - -#ifdef CONFIG_COMMON_CLK - -/** - * DOC: clk notifier callback types - * - * PRE_RATE_CHANGE - called immediately before the clk rate is changed, - * to indicate that the rate change will proceed. Drivers must - * immediately terminate any operations that will be affected by the - * rate change. Callbacks may either return NOTIFY_DONE or - * NOTIFY_STOP. - * - * ABORT_RATE_CHANGE: called if the rate change failed for some reason - * after PRE_RATE_CHANGE. In this case, all registered notifiers on - * the clk will be called with ABORT_RATE_CHANGE. Callbacks must - * always return NOTIFY_DONE. - * - * POST_RATE_CHANGE - called after the clk rate change has successfully - * completed. Callbacks must always return NOTIFY_DONE. - * - */ -#define PRE_RATE_CHANGE BIT(0) -#define POST_RATE_CHANGE BIT(1) -#define ABORT_RATE_CHANGE BIT(2) - -/** - * struct clk_notifier - associate a clk with a notifier - * @clk: struct clk * to associate the notifier with - * @notifier_head: a blocking_notifier_head for this clk - * @node: linked list pointers - * - * A list of struct clk_notifier is maintained by the notifier code. - * An entry is created whenever code registers the first notifier on a - * particular @clk. Future notifiers on that @clk are added to the - * @notifier_head. - */ -struct clk_notifier { - struct clk *clk; - struct srcu_notifier_head notifier_head; - struct list_head node; -}; - -/** - * struct clk_notifier_data - rate data to pass to the notifier callback - * @clk: struct clk * being changed - * @old_rate: previous rate of this clk - * @new_rate: new rate of this clk - * - * For a pre-notifier, old_rate is the clk's rate before this rate - * change, and new_rate is what the rate will be in the future. For a - * post-notifier, old_rate and new_rate are both set to the clk's - * current rate (this was done to optimize the implementation). - */ -struct clk_notifier_data { - struct clk *clk; - unsigned long old_rate; - unsigned long new_rate; -}; - -int clk_notifier_register(struct clk *clk, struct notifier_block *nb); - -int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb); - -#endif /* !CONFIG_COMMON_CLK */ - -/** - * clk_get - lookup and obtain a reference to a clock producer. - * @dev: device for clock "consumer" - * @id: clock comsumer ID - * - * Returns a struct clk corresponding to the clock producer, or - * valid IS_ERR() condition containing errno. The implementation - * uses @dev and @id to determine the clock consumer, and thereby - * the clock producer. (IOW, @id may be identical strings, but - * clk_get may return different clock producers depending on @dev.) - * - * Drivers must assume that the clock source is not enabled. - * - * clk_get should not be called from within interrupt context. - */ -struct clk *clk_get(struct device *dev, const char *id); - -/** - * clk_prepare - prepare a clock source - * @clk: clock source - * - * This prepares the clock source for use. - * - * Must not be called from within atomic context. - */ -#ifdef CONFIG_HAVE_CLK_PREPARE -int clk_prepare(struct clk *clk); -#else -static inline int clk_prepare(struct clk *clk) -{ - might_sleep(); - return 0; -} -#endif - -/** - * clk_enable - inform the system when the clock source should be running. - * @clk: clock source - * - * If the clock can not be enabled/disabled, this should return success. - * - * May be called from atomic contexts. - * - * Returns success (0) or negative errno. - */ -int clk_enable(struct clk *clk); - -/** - * clk_disable - inform the system when the clock source is no longer required. - * @clk: clock source - * - * Inform the system that a clock source is no longer required by - * a driver and may be shut down. - * - * May be called from atomic contexts. - * - * Implementation detail: if the clock source is shared between - * multiple drivers, clk_enable() calls must be balanced by the - * same number of clk_disable() calls for the clock source to be - * disabled. - */ -void clk_disable(struct clk *clk); - - -/** - * clk_unprepare - undo preparation of a clock source - * @clk: clock source - * - * This undoes a previously prepared clock. The caller must balance - * the number of prepare and unprepare calls. - * - * Must not be called from within atomic context. - */ -#ifdef CONFIG_HAVE_CLK_PREPARE -void clk_unprepare(struct clk *clk); -#else -static inline void clk_unprepare(struct clk *clk) -{ - might_sleep(); -} -#endif - -/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */ -static inline int clk_prepare_enable(struct clk *clk) -{ - int ret; - - ret = clk_prepare(clk); - if (ret) - return ret; - ret = clk_enable(clk); - if (ret) - clk_unprepare(clk); - - return ret; -} - -/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */ -static inline void clk_disable_unprepare(struct clk *clk) -{ - clk_disable(clk); - clk_unprepare(clk); -} - -/** - * clk_get_rate - obtain the current clock rate (in Hz) for a clock source. - * This is only valid once the clock source has been enabled. - * @clk: clock source - */ -unsigned long clk_get_rate(struct clk *clk); - -/** - * clk_put - "free" the clock source - * @clk: clock source - * - * Note: drivers must ensure that all clk_enable calls made on this - * clock source are balanced by clk_disable calls prior to calling - * this function. - * - * clk_put should not be called from within interrupt context. - */ -void clk_put(struct clk *clk); - - -/* - * The remaining APIs are optional for machine class support. - */ - - -/** - * clk_round_rate - adjust a rate to the exact rate a clock can provide - * @clk: clock source - * @rate: desired clock rate in Hz - * - * Returns rounded clock rate in Hz, or negative errno. - */ -long clk_round_rate(struct clk *clk, unsigned long rate); - -/** - * clk_set_rate - set the clock rate for a clock source - * @clk: clock source - * @rate: desired clock rate in Hz - * - * Returns success (0) or negative errno. - */ -int clk_set_rate(struct clk *clk, unsigned long rate); - -/** - * clk_set_parent - set the parent clock source for this clock - * @clk: clock source - * @parent: parent clock source - * - * Returns success (0) or negative errno. - */ -int clk_set_parent(struct clk *clk, struct clk *parent); - -/** - * clk_get_parent - get the parent clock source for this clock - * @clk: clock source - * - * Returns struct clk corresponding to parent clock source, or - * valid IS_ERR() condition containing errno. - */ -struct clk *clk_get_parent(struct clk *clk); - -/** - * clk_get_sys - get a clock based upon the device name - * @dev_id: device name - * @con_id: connection ID - * - * Returns a struct clk corresponding to the clock producer, or - * valid IS_ERR() condition containing errno. The implementation - * uses @dev_id and @con_id to determine the clock consumer, and - * thereby the clock producer. In contrast to clk_get() this function - * takes the device name instead of the device itself for identification. - * - * Drivers must assume that the clock source is not enabled. - * - * clk_get_sys should not be called from within interrupt context. - */ -struct clk *clk_get_sys(const char *dev_id, const char *con_id); - -/** - * clk_add_alias - add a new clock alias - * @alias: name for clock alias - * @alias_dev_name: device name - * @id: platform specific clock name - * @dev: device - * - * Allows using generic clock names for drivers by adding a new alias. - * Assumes clkdev, see clkdev.h for more info. - */ -int clk_add_alias(const char *alias, const char *alias_dev_name, char *id, - struct device *dev); - -#endif |