Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 676 deletions

diff --git a/ANDROID_3.4.5/drivers/base/power/opp.c b/ANDROID_3.4.5/drivers/base/power/opp.c
deleted file mode 100644
index ac993eaf..00000000
--- a/ANDROID_3.4.5/drivers/base/power/opp.c
+++ /dev/null
@@ -1,676 +0,0 @@
-/*
- * Generic OPP Interface
- *
- * Copyright (C) 2009-2010 Texas Instruments Incorporated.
- *	Nishanth Menon
- *	Romit Dasgupta
- *	Kevin Hilman
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/cpufreq.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/rculist.h>
-#include <linux/rcupdate.h>
-#include <linux/opp.h>
-
-/*
- * Internal data structure organization with the OPP layer library is as
- * follows:
- * dev_opp_list (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 dev_opp structure while each opp
- * is represented by the opp structure.
- */
-
-/**
- * struct opp - Generic OPP description structure
- * @node:	opp list 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.
- *		RCU usage: opp list is traversed with RCU locks. node
- *		modification is possible realtime, hence the modifications
- *		are protected by the dev_opp_list_lock for integrity.
- *		IMPORTANT: the opp nodes should be maintained in increasing
- *		order.
- * @available:	true/false - marks if this OPP as available or not
- * @rate:	Frequency in hertz
- * @u_volt:	Nominal voltage in microvolts corresponding to this OPP
- * @dev_opp:	points back to the device_opp struct this opp belongs to
- *
- * This structure stores the OPP information for a given device.
- */
-struct opp {
-	struct list_head node;
-
-	bool available;
-	unsigned long rate;
-	unsigned long u_volt;
-
-	struct device_opp *dev_opp;
-};
-
-/**
- * struct device_opp - Device opp structure
- * @node:	list node - contains the devices with OPPs that
- *		have been registered. Nodes once added are not modified in this
- *		list.
- *		RCU usage: nodes are not modified in the list of device_opp,
- *		however addition is possible and is secured by dev_opp_list_lock
- * @dev:	device pointer
- * @head:	notifier head to notify the OPP availability changes.
- * @opp_list:	list of opps
- *
- * 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 device_opp {
-	struct list_head node;
-
-	struct device *dev;
-	struct srcu_notifier_head head;
-	struct list_head opp_list;
-};
-
-/*
- * The root of the list of all devices. All device_opp structures branch off
- * from here, with each device_opp containing the list of opp it supports in
- * various states of availability.
- */
-static LIST_HEAD(dev_opp_list);
-/* Lock to allow exclusive modification to the device and opp lists */
-static DEFINE_MUTEX(dev_opp_list_lock);
-
-/**
- * find_device_opp() - find device_opp struct using device pointer
- * @dev:	device pointer used to lookup device OPPs
- *
- * Search list of device OPPs for one containing matching device. Does a RCU
- * reader operation to grab the pointer needed.
- *
- * Returns pointer to 'struct device_opp' if found, otherwise -ENODEV or
- * -EINVAL based on type of error.
- *
- * Locking: This function must be called under rcu_read_lock(). device_opp
- * is a RCU protected pointer. This means that device_opp is valid as long
- * as we are under RCU lock.
- */
-static struct device_opp *find_device_opp(struct device *dev)
-{
-	struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
-
-	if (unlikely(IS_ERR_OR_NULL(dev))) {
-		pr_err("%s: Invalid parameters\n", __func__);
-		return ERR_PTR(-EINVAL);
-	}
-
-	list_for_each_entry_rcu(tmp_dev_opp, &dev_opp_list, node) {
-		if (tmp_dev_opp->dev == dev) {
-			dev_opp = tmp_dev_opp;
-			break;
-		}
-	}
-
-	return dev_opp;
-}
-
-/**
- * opp_get_voltage() - Gets the voltage corresponding to an available opp
- * @opp:	opp for which voltage has to be returned for
- *
- * Return voltage in micro volt corresponding to the opp, else
- * return 0
- *
- * Locking: This function must be called under rcu_read_lock(). opp is a rcu
- * protected pointer. This means that opp which could have been fetched by
- * opp_find_freq_{exact,ceil,floor} functions is valid as long as we are
- * under RCU lock. The pointer returned by the opp_find_freq family must be
- * used in the same section as the usage of this function with the pointer
- * prior to unlocking with rcu_read_unlock() to maintain the integrity of the
- * pointer.
- */
-unsigned long opp_get_voltage(struct opp *opp)
-{
-	struct opp *tmp_opp;
-	unsigned long v = 0;
-
-	tmp_opp = rcu_dereference(opp);
-	if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
-		pr_err("%s: Invalid parameters\n", __func__);
-	else
-		v = tmp_opp->u_volt;
-
-	return v;
-}
-
-/**
- * opp_get_freq() - Gets the frequency corresponding to an available opp
- * @opp:	opp for which frequency has to be returned for
- *
- * Return frequency in hertz corresponding to the opp, else
- * return 0
- *
- * Locking: This function must be called under rcu_read_lock(). opp is a rcu
- * protected pointer. This means that opp which could have been fetched by
- * opp_find_freq_{exact,ceil,floor} functions is valid as long as we are
- * under RCU lock. The pointer returned by the opp_find_freq family must be
- * used in the same section as the usage of this function with the pointer
- * prior to unlocking with rcu_read_unlock() to maintain the integrity of the
- * pointer.
- */
-unsigned long opp_get_freq(struct opp *opp)
-{
-	struct opp *tmp_opp;
-	unsigned long f = 0;
-
-	tmp_opp = rcu_dereference(opp);
-	if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
-		pr_err("%s: Invalid parameters\n", __func__);
-	else
-		f = tmp_opp->rate;
-
-	return f;
-}
-
-/**
- * opp_get_opp_count() - Get number of opps available in the opp list
- * @dev:	device for which we do this operation
- *
- * This function returns the number of available opps if there are any,
- * else returns 0 if none or the corresponding error value.
- *
- * Locking: This function must be called under rcu_read_lock(). This function
- * internally references two RCU protected structures: device_opp and opp which
- * are safe as long as we are under a common RCU locked section.
- */
-int opp_get_opp_count(struct device *dev)
-{
-	struct device_opp *dev_opp;
-	struct opp *temp_opp;
-	int count = 0;
-
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp)) {
-		int r = PTR_ERR(dev_opp);
-		dev_err(dev, "%s: device OPP not found (%d)\n", __func__, r);
-		return r;
-	}
-
-	list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
-		if (temp_opp->available)
-			count++;
-	}
-
-	return count;
-}
-
-/**
- * opp_find_freq_exact() - search for an exact frequency
- * @dev:		device for which we do this operation
- * @freq:		frequency to search for
- * @available:		true/false - match for available opp
- *
- * Searches for exact match in the opp list and returns pointer to the matching
- * opp if found, else returns ERR_PTR in case of error and should be handled
- * using IS_ERR.
- *
- * Note: available is a modifier for the search. if available=true, then the
- * match is for exact matching frequency and is available in the stored OPP
- * table. if false, the match is for exact frequency which is not available.
- *
- * This provides a mechanism to enable an opp which is not available currently
- * or the opposite as well.
- *
- * Locking: This function must be called under rcu_read_lock(). opp is a rcu
- * protected pointer. The reason for the same is that the opp pointer which is
- * returned will remain valid for use with opp_get_{voltage, freq} only while
- * under the locked area. The pointer returned must be used prior to unlocking
- * with rcu_read_unlock() to maintain the integrity of the pointer.
- */
-struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
-				bool available)
-{
-	struct device_opp *dev_opp;
-	struct opp *temp_opp, *opp = ERR_PTR(-ENODEV);
-
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp)) {
-		int r = PTR_ERR(dev_opp);
-		dev_err(dev, "%s: device OPP not found (%d)\n", __func__, r);
-		return ERR_PTR(r);
-	}
-
-	list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
-		if (temp_opp->available == available &&
-				temp_opp->rate == freq) {
-			opp = temp_opp;
-			break;
-		}
-	}
-
-	return opp;
-}
-
-/**
- * opp_find_freq_ceil() - Search for an rounded ceil freq
- * @dev:	device for which we do this operation
- * @freq:	Start frequency
- *
- * Search for the matching ceil *available* OPP from a starting freq
- * for a device.
- *
- * Returns matching *opp and refreshes *freq accordingly, else returns
- * ERR_PTR in case of error and should be handled using IS_ERR.
- *
- * Locking: This function must be called under rcu_read_lock(). opp is a rcu
- * protected pointer. The reason for the same is that the opp pointer which is
- * returned will remain valid for use with opp_get_{voltage, freq} only while
- * under the locked area. The pointer returned must be used prior to unlocking
- * with rcu_read_unlock() to maintain the integrity of the pointer.
- */
-struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq)
-{
-	struct device_opp *dev_opp;
-	struct opp *temp_opp, *opp = ERR_PTR(-ENODEV);
-
-	if (!dev || !freq) {
-		dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
-		return ERR_PTR(-EINVAL);
-	}
-
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp))
-		return opp;
-
-	list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
-		if (temp_opp->available && temp_opp->rate >= *freq) {
-			opp = temp_opp;
-			*freq = opp->rate;
-			break;
-		}
-	}
-
-	return opp;
-}
-
-/**
- * opp_find_freq_floor() - Search for a rounded floor freq
- * @dev:	device for which we do this operation
- * @freq:	Start frequency
- *
- * Search for the matching floor *available* OPP from a starting freq
- * for a device.
- *
- * Returns matching *opp and refreshes *freq accordingly, else returns
- * ERR_PTR in case of error and should be handled using IS_ERR.
- *
- * Locking: This function must be called under rcu_read_lock(). opp is a rcu
- * protected pointer. The reason for the same is that the opp pointer which is
- * returned will remain valid for use with opp_get_{voltage, freq} only while
- * under the locked area. The pointer returned must be used prior to unlocking
- * with rcu_read_unlock() to maintain the integrity of the pointer.
- */
-struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq)
-{
-	struct device_opp *dev_opp;
-	struct opp *temp_opp, *opp = ERR_PTR(-ENODEV);
-
-	if (!dev || !freq) {
-		dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
-		return ERR_PTR(-EINVAL);
-	}
-
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp))
-		return opp;
-
-	list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) {
-		if (temp_opp->available) {
-			/* go to the next node, before choosing prev */
-			if (temp_opp->rate > *freq)
-				break;
-			else
-				opp = temp_opp;
-		}
-	}
-	if (!IS_ERR(opp))
-		*freq = opp->rate;
-
-	return opp;
-}
-
-/**
- * opp_add()  - Add an OPP table from a table definitions
- * @dev:	device for which we do this operation
- * @freq:	Frequency in Hz for this OPP
- * @u_volt:	Voltage in uVolts for this OPP
- *
- * This function adds an opp definition to the opp list and returns status.
- * The opp is made available by default and it can be controlled using
- * opp_enable/disable functions.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function internally uses RCU updater strategy with mutex locks
- * to keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex cannot be locked.
- */
-int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
-{
-	struct device_opp *dev_opp = NULL;
-	struct opp *opp, *new_opp;
-	struct list_head *head;
-
-	/* allocate new OPP node */
-	new_opp = kzalloc(sizeof(struct opp), GFP_KERNEL);
-	if (!new_opp) {
-		dev_warn(dev, "%s: Unable to create new OPP node\n", __func__);
-		return -ENOMEM;
-	}
-
-	/* Hold our list modification lock here */
-	mutex_lock(&dev_opp_list_lock);
-
-	/* Check for existing list for 'dev' */
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp)) {
-		/*
-		 * Allocate a new device OPP table. In the infrequent case
-		 * where a new device is needed to be added, we pay this
-		 * penalty.
-		 */
-		dev_opp = kzalloc(sizeof(struct device_opp), GFP_KERNEL);
-		if (!dev_opp) {
-			mutex_unlock(&dev_opp_list_lock);
-			kfree(new_opp);
-			dev_warn(dev,
-				"%s: Unable to create device OPP structure\n",
-				__func__);
-			return -ENOMEM;
-		}
-
-		dev_opp->dev = dev;
-		srcu_init_notifier_head(&dev_opp->head);
-		INIT_LIST_HEAD(&dev_opp->opp_list);
-
-		/* Secure the device list modification */
-		list_add_rcu(&dev_opp->node, &dev_opp_list);
-	}
-
-	/* populate the opp table */
-	new_opp->dev_opp = dev_opp;
-	new_opp->rate = freq;
-	new_opp->u_volt = u_volt;
-	new_opp->available = true;
-
-	/* Insert new OPP in order of increasing frequency */
-	head = &dev_opp->opp_list;
-	list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) {
-		if (new_opp->rate < opp->rate)
-			break;
-		else
-			head = &opp->node;
-	}
-
-	list_add_rcu(&new_opp->node, head);
-	mutex_unlock(&dev_opp_list_lock);
-
-	/*
-	 * Notify the changes in the availability of the operable
-	 * frequency/voltage list.
-	 */
-	srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_ADD, new_opp);
-	return 0;
-}
-
-/**
- * opp_set_availability() - helper to set the availability of an opp
- * @dev:		device for which we do this operation
- * @freq:		OPP frequency to modify availability
- * @availability_req:	availability status requested for this opp
- *
- * Set the availability of an OPP with an RCU operation, opp_{enable,disable}
- * share a common logic which is isolated here.
- *
- * Returns -EINVAL for bad pointers, -ENOMEM if no memory available for the
- * copy operation, returns 0 if no modifcation was done OR modification was
- * successful.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function internally uses RCU updater strategy with mutex locks to
- * keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex locking or synchronize_rcu() blocking calls cannot be used.
- */
-static int opp_set_availability(struct device *dev, unsigned long freq,
-		bool availability_req)
-{
-	struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
-	struct opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
-	int r = 0;
-
-	/* keep the node allocated */
-	new_opp = kmalloc(sizeof(struct opp), GFP_KERNEL);
-	if (!new_opp) {
-		dev_warn(dev, "%s: Unable to create OPP\n", __func__);
-		return -ENOMEM;
-	}
-
-	mutex_lock(&dev_opp_list_lock);
-
-	/* Find the device_opp */
-	list_for_each_entry(tmp_dev_opp, &dev_opp_list, node) {
-		if (dev == tmp_dev_opp->dev) {
-			dev_opp = tmp_dev_opp;
-			break;
-		}
-	}
-	if (IS_ERR(dev_opp)) {
-		r = PTR_ERR(dev_opp);
-		dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
-		goto unlock;
-	}
-
-	/* Do we have the frequency? */
-	list_for_each_entry(tmp_opp, &dev_opp->opp_list, node) {
-		if (tmp_opp->rate == freq) {
-			opp = tmp_opp;
-			break;
-		}
-	}
-	if (IS_ERR(opp)) {
-		r = PTR_ERR(opp);
-		goto unlock;
-	}
-
-	/* Is update really needed? */
-	if (opp->available == availability_req)
-		goto unlock;
-	/* copy the old data over */
-	*new_opp = *opp;
-
-	/* plug in new node */
-	new_opp->available = availability_req;
-
-	list_replace_rcu(&opp->node, &new_opp->node);
-	mutex_unlock(&dev_opp_list_lock);
-	synchronize_rcu();
-
-	/* Notify the change of the OPP availability */
-	if (availability_req)
-		srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_ENABLE,
-					 new_opp);
-	else
-		srcu_notifier_call_chain(&dev_opp->head, OPP_EVENT_DISABLE,
-					 new_opp);
-
-	/* clean up old opp */
-	new_opp = opp;
-	goto out;
-
-unlock:
-	mutex_unlock(&dev_opp_list_lock);
-out:
-	kfree(new_opp);
-	return r;
-}
-
-/**
- * opp_enable() - Enable a specific OPP
- * @dev:	device for which we do this operation
- * @freq:	OPP frequency to enable
- *
- * Enables a provided opp. If the operation is valid, this returns 0, else the
- * corresponding error value. It is meant to be used for users an OPP available
- * after being temporarily made unavailable with opp_disable.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function indirectly uses RCU and mutex locks to keep the
- * integrity of the internal data structures. Callers should ensure that
- * this function is *NOT* called under RCU protection or in contexts where
- * mutex locking or synchronize_rcu() blocking calls cannot be used.
- */
-int opp_enable(struct device *dev, unsigned long freq)
-{
-	return opp_set_availability(dev, freq, true);
-}
-
-/**
- * opp_disable() - Disable a specific OPP
- * @dev:	device for which we do this operation
- * @freq:	OPP frequency to disable
- *
- * Disables a provided opp. If the operation is valid, this returns
- * 0, else the corresponding error value. It is meant to be a temporary
- * control by users to make this OPP not available until the circumstances are
- * right to make it available again (with a call to opp_enable).
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function indirectly uses RCU and mutex locks to keep the
- * integrity of the internal data structures. Callers should ensure that
- * this function is *NOT* called under RCU protection or in contexts where
- * mutex locking or synchronize_rcu() blocking calls cannot be used.
- */
-int opp_disable(struct device *dev, unsigned long freq)
-{
-	return opp_set_availability(dev, freq, false);
-}
-
-#ifdef CONFIG_CPU_FREQ
-/**
- * opp_init_cpufreq_table() - create a cpufreq table for a device
- * @dev:	device for which we do this operation
- * @table:	Cpufreq table returned back to caller
- *
- * Generate a cpufreq table for a provided device- this assumes that the
- * opp list is already initialized and ready for usage.
- *
- * This function allocates required memory for the cpufreq table. It is
- * expected that the caller does the required maintenance such as freeing
- * the table as required.
- *
- * Returns -EINVAL for bad pointers, -ENODEV if the device is not found, -ENOMEM
- * if no memory available for the operation (table is not populated), returns 0
- * if successful and table is populated.
- *
- * WARNING: It is  important for the callers to ensure refreshing their copy of
- * the table if any of the mentioned functions have been invoked in the interim.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * To simplify the logic, we pretend we are updater and hold relevant mutex here
- * Callers should ensure that this function is *NOT* called under RCU protection
- * or in contexts where mutex locking cannot be used.
- */
-int opp_init_cpufreq_table(struct device *dev,
-			    struct cpufreq_frequency_table **table)
-{
-	struct device_opp *dev_opp;
-	struct opp *opp;
-	struct cpufreq_frequency_table *freq_table;
-	int i = 0;
-
-	/* Pretend as if I am an updater */
-	mutex_lock(&dev_opp_list_lock);
-
-	dev_opp = find_device_opp(dev);
-	if (IS_ERR(dev_opp)) {
-		int r = PTR_ERR(dev_opp);
-		mutex_unlock(&dev_opp_list_lock);
-		dev_err(dev, "%s: Device OPP not found (%d)\n", __func__, r);
-		return r;
-	}
-
-	freq_table = kzalloc(sizeof(struct cpufreq_frequency_table) *
-			     (opp_get_opp_count(dev) + 1), GFP_KERNEL);
-	if (!freq_table) {
-		mutex_unlock(&dev_opp_list_lock);
-		dev_warn(dev, "%s: Unable to allocate frequency table\n",
-			__func__);
-		return -ENOMEM;
-	}
-
-	list_for_each_entry(opp, &dev_opp->opp_list, node) {
-		if (opp->available) {
-			freq_table[i].index = i;
-			freq_table[i].frequency = opp->rate / 1000;
-			i++;
-		}
-	}
-	mutex_unlock(&dev_opp_list_lock);
-
-	freq_table[i].index = i;
-	freq_table[i].frequency = CPUFREQ_TABLE_END;
-
-	*table = &freq_table[0];
-
-	return 0;
-}
-
-/**
- * opp_free_cpufreq_table() - free the cpufreq table
- * @dev:	device for which we do this operation
- * @table:	table to free
- *
- * Free up the table allocated by opp_init_cpufreq_table
- */
-void opp_free_cpufreq_table(struct device *dev,
-				struct cpufreq_frequency_table **table)
-{
-	if (!table)
-		return;
-
-	kfree(*table);
-	*table = NULL;
-}
-#endif		/* CONFIG_CPU_FREQ */
-
-/**
- * opp_get_notifier() - find notifier_head of the device with opp
- * @dev:	device pointer used to lookup device OPPs.
- */
-struct srcu_notifier_head *opp_get_notifier(struct device *dev)
-{
-	struct device_opp *dev_opp = find_device_opp(dev);
-
-	if (IS_ERR(dev_opp))
-		return ERR_CAST(dev_opp); /* matching type */
-
-	return &dev_opp->head;
-}