diff options
author | Viresh Kumar <viresh.kumar@linaro.org> | 2017-09-26 15:12:40 -0700 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-10-03 02:45:12 +0200 |
commit | 7813dd6fc75fb375d4caf002e7f80a826fc3153a (patch) | |
tree | 37326fb95800c931382c3abda492d207c81aef41 /drivers/base | |
parent | 9e66317d3c92ddaab330c125dfe9d06eee268aff (diff) |
PM / OPP: Move the OPP directory out of power/
The drivers/base/power/ directory is special and contains code related
to power management core like system suspend/resume, hibernation, etc.
It was fine to keep the OPP code inside it when we had just one file for
it, but it is growing now and already has a directory for itself.
Lets move it directly under drivers/ directory, just like cpufreq and
cpuidle.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/power/Makefile | 1 | ||||
-rw-r--r-- | drivers/base/power/opp/Makefile | 4 | ||||
-rw-r--r-- | drivers/base/power/opp/core.c | 1747 | ||||
-rw-r--r-- | drivers/base/power/opp/cpu.c | 236 | ||||
-rw-r--r-- | drivers/base/power/opp/debugfs.c | 249 | ||||
-rw-r--r-- | drivers/base/power/opp/of.c | 633 | ||||
-rw-r--r-- | drivers/base/power/opp/opp.h | 222 |
7 files changed, 0 insertions, 3092 deletions
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile index 5998c53280f5..73a1cffc0a5f 100644 --- a/drivers/base/power/Makefile +++ b/drivers/base/power/Makefile @@ -1,7 +1,6 @@ obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o wakeirq.o obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o obj-$(CONFIG_PM_TRACE_RTC) += trace.o -obj-$(CONFIG_PM_OPP) += opp/ obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o obj-$(CONFIG_HAVE_CLK) += clock_ops.o diff --git a/drivers/base/power/opp/Makefile b/drivers/base/power/opp/Makefile deleted file mode 100644 index e70ceb406fe9..000000000000 --- a/drivers/base/power/opp/Makefile +++ /dev/null @@ -1,4 +0,0 @@ -ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG -obj-y += core.o cpu.o -obj-$(CONFIG_OF) += of.o -obj-$(CONFIG_DEBUG_FS) += debugfs.o diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c deleted file mode 100644 index a6de32530693..000000000000 --- a/drivers/base/power/opp/core.c +++ /dev/null @@ -1,1747 +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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/clk.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/export.h> -#include <linux/regulator/consumer.h> - -#include "opp.h" - -/* - * The root of the list of all opp-tables. All opp_table structures branch off - * from here, with each opp_table containing the list of opps it supports in - * various states of availability. - */ -LIST_HEAD(opp_tables); -/* Lock to allow exclusive modification to the device and opp lists */ -DEFINE_MUTEX(opp_table_lock); - -static void dev_pm_opp_get(struct dev_pm_opp *opp); - -static struct opp_device *_find_opp_dev(const struct device *dev, - struct opp_table *opp_table) -{ - struct opp_device *opp_dev; - - list_for_each_entry(opp_dev, &opp_table->dev_list, node) - if (opp_dev->dev == dev) - return opp_dev; - - return NULL; -} - -static struct opp_table *_find_opp_table_unlocked(struct device *dev) -{ - struct opp_table *opp_table; - - list_for_each_entry(opp_table, &opp_tables, node) { - if (_find_opp_dev(dev, opp_table)) { - _get_opp_table_kref(opp_table); - - return opp_table; - } - } - - return ERR_PTR(-ENODEV); -} - -/** - * _find_opp_table() - find opp_table struct using device pointer - * @dev: device pointer used to lookup OPP table - * - * Search OPP table for one containing matching device. - * - * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or - * -EINVAL based on type of error. - * - * The callers must call dev_pm_opp_put_opp_table() after the table is used. - */ -struct opp_table *_find_opp_table(struct device *dev) -{ - struct opp_table *opp_table; - - if (IS_ERR_OR_NULL(dev)) { - pr_err("%s: Invalid parameters\n", __func__); - return ERR_PTR(-EINVAL); - } - - mutex_lock(&opp_table_lock); - opp_table = _find_opp_table_unlocked(dev); - mutex_unlock(&opp_table_lock); - - return opp_table; -} - -/** - * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp - * @opp: opp for which voltage has to be returned for - * - * Return: voltage in micro volt corresponding to the opp, else - * return 0 - * - * This is useful only for devices with single power supply. - */ -unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) -{ - if (IS_ERR_OR_NULL(opp)) { - pr_err("%s: Invalid parameters\n", __func__); - return 0; - } - - return opp->supplies[0].u_volt; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); - -/** - * dev_pm_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 - */ -unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) -{ - if (IS_ERR_OR_NULL(opp) || !opp->available) { - pr_err("%s: Invalid parameters\n", __func__); - return 0; - } - - return opp->rate; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); - -/** - * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not - * @opp: opp for which turbo mode is being verified - * - * Turbo OPPs are not for normal use, and can be enabled (under certain - * conditions) for short duration of times to finish high throughput work - * quickly. Running on them for longer times may overheat the chip. - * - * Return: true if opp is turbo opp, else false. - */ -bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) -{ - if (IS_ERR_OR_NULL(opp) || !opp->available) { - pr_err("%s: Invalid parameters\n", __func__); - return false; - } - - return opp->turbo; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); - -/** - * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds - * @dev: device for which we do this operation - * - * Return: This function returns the max clock latency in nanoseconds. - */ -unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) -{ - struct opp_table *opp_table; - unsigned long clock_latency_ns; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return 0; - - clock_latency_ns = opp_table->clock_latency_ns_max; - - dev_pm_opp_put_opp_table(opp_table); - - return clock_latency_ns; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); - -/** - * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds - * @dev: device for which we do this operation - * - * Return: This function returns the max voltage latency in nanoseconds. - */ -unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) -{ - struct opp_table *opp_table; - struct dev_pm_opp *opp; - struct regulator *reg; - unsigned long latency_ns = 0; - int ret, i, count; - struct { - unsigned long min; - unsigned long max; - } *uV; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return 0; - - count = opp_table->regulator_count; - - /* Regulator may not be required for the device */ - if (!count) - goto put_opp_table; - - uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL); - if (!uV) - goto put_opp_table; - - mutex_lock(&opp_table->lock); - - for (i = 0; i < count; i++) { - uV[i].min = ~0; - uV[i].max = 0; - - list_for_each_entry(opp, &opp_table->opp_list, node) { - if (!opp->available) - continue; - - if (opp->supplies[i].u_volt_min < uV[i].min) - uV[i].min = opp->supplies[i].u_volt_min; - if (opp->supplies[i].u_volt_max > uV[i].max) - uV[i].max = opp->supplies[i].u_volt_max; - } - } - - mutex_unlock(&opp_table->lock); - - /* - * The caller needs to ensure that opp_table (and hence the regulator) - * isn't freed, while we are executing this routine. - */ - for (i = 0; i < count; i++) { - reg = opp_table->regulators[i]; - ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max); - if (ret > 0) - latency_ns += ret * 1000; - } - - kfree(uV); -put_opp_table: - dev_pm_opp_put_opp_table(opp_table); - - return latency_ns; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency); - -/** - * dev_pm_opp_get_max_transition_latency() - Get max transition latency in - * nanoseconds - * @dev: device for which we do this operation - * - * Return: This function returns the max transition latency, in nanoseconds, to - * switch from one OPP to other. - */ -unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) -{ - return dev_pm_opp_get_max_volt_latency(dev) + - dev_pm_opp_get_max_clock_latency(dev); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency); - -/** - * dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz - * @dev: device for which we do this operation - * - * Return: This function returns the frequency of the OPP marked as suspend_opp - * if one is available, else returns 0; - */ -unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) -{ - struct opp_table *opp_table; - unsigned long freq = 0; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return 0; - - if (opp_table->suspend_opp && opp_table->suspend_opp->available) - freq = dev_pm_opp_get_freq(opp_table->suspend_opp); - - dev_pm_opp_put_opp_table(opp_table); - - return freq; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq); - -/** - * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table - * @dev: device for which we do this operation - * - * Return: This function returns the number of available opps if there are any, - * else returns 0 if none or the corresponding error value. - */ -int dev_pm_opp_get_opp_count(struct device *dev) -{ - struct opp_table *opp_table; - struct dev_pm_opp *temp_opp; - int count = 0; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) { - count = PTR_ERR(opp_table); - dev_err(dev, "%s: OPP table not found (%d)\n", - __func__, count); - return count; - } - - mutex_lock(&opp_table->lock); - - list_for_each_entry(temp_opp, &opp_table->opp_list, node) { - if (temp_opp->available) - count++; - } - - mutex_unlock(&opp_table->lock); - dev_pm_opp_put_opp_table(opp_table); - - return count; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count); - -/** - * dev_pm_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 - * - * Return: Searches for exact match in the opp table and returns pointer to the - * matching opp if found, else returns ERR_PTR in case of error and should - * be handled using IS_ERR. Error return values can be: - * EINVAL: for bad pointer - * ERANGE: no match found for search - * ENODEV: if device not found in list of registered devices - * - * 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. - * - * The callers are required to call dev_pm_opp_put() for the returned OPP after - * use. - */ -struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, - unsigned long freq, - bool available) -{ - struct opp_table *opp_table; - struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) { - int r = PTR_ERR(opp_table); - - dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r); - return ERR_PTR(r); - } - - mutex_lock(&opp_table->lock); - - list_for_each_entry(temp_opp, &opp_table->opp_list, node) { - if (temp_opp->available == available && - temp_opp->rate == freq) { - opp = temp_opp; - - /* Increment the reference count of OPP */ - dev_pm_opp_get(opp); - break; - } - } - - mutex_unlock(&opp_table->lock); - dev_pm_opp_put_opp_table(opp_table); - - return opp; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); - -static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, - unsigned long *freq) -{ - struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); - - mutex_lock(&opp_table->lock); - - list_for_each_entry(temp_opp, &opp_table->opp_list, node) { - if (temp_opp->available && temp_opp->rate >= *freq) { - opp = temp_opp; - *freq = opp->rate; - - /* Increment the reference count of OPP */ - dev_pm_opp_get(opp); - break; - } - } - - mutex_unlock(&opp_table->lock); - - return opp; -} - -/** - * dev_pm_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. - * - * Return: matching *opp and refreshes *freq accordingly, else returns - * ERR_PTR in case of error and should be handled using IS_ERR. Error return - * values can be: - * EINVAL: for bad pointer - * ERANGE: no match found for search - * ENODEV: if device not found in list of registered devices - * - * The callers are required to call dev_pm_opp_put() for the returned OPP after - * use. - */ -struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, - unsigned long *freq) -{ - struct opp_table *opp_table; - struct dev_pm_opp *opp; - - if (!dev || !freq) { - dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); - return ERR_PTR(-EINVAL); - } - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return ERR_CAST(opp_table); - - opp = _find_freq_ceil(opp_table, freq); - - dev_pm_opp_put_opp_table(opp_table); - - return opp; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); - -/** - * dev_pm_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. - * - * Return: matching *opp and refreshes *freq accordingly, else returns - * ERR_PTR in case of error and should be handled using IS_ERR. Error return - * values can be: - * EINVAL: for bad pointer - * ERANGE: no match found for search - * ENODEV: if device not found in list of registered devices - * - * The callers are required to call dev_pm_opp_put() for the returned OPP after - * use. - */ -struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, - unsigned long *freq) -{ - struct opp_table *opp_table; - struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); - - if (!dev || !freq) { - dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); - return ERR_PTR(-EINVAL); - } - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return ERR_CAST(opp_table); - - mutex_lock(&opp_table->lock); - - list_for_each_entry(temp_opp, &opp_table->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; - } - } - - /* Increment the reference count of OPP */ - if (!IS_ERR(opp)) - dev_pm_opp_get(opp); - mutex_unlock(&opp_table->lock); - dev_pm_opp_put_opp_table(opp_table); - - if (!IS_ERR(opp)) - *freq = opp->rate; - - return opp; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); - -static int _set_opp_voltage(struct device *dev, struct regulator *reg, - struct dev_pm_opp_supply *supply) -{ - int ret; - - /* Regulator not available for device */ - if (IS_ERR(reg)) { - dev_dbg(dev, "%s: regulator not available: %ld\n", __func__, - PTR_ERR(reg)); - return 0; - } - - dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, - supply->u_volt_min, supply->u_volt, supply->u_volt_max); - - ret = regulator_set_voltage_triplet(reg, supply->u_volt_min, - supply->u_volt, supply->u_volt_max); - if (ret) - dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n", - __func__, supply->u_volt_min, supply->u_volt, - supply->u_volt_max, ret); - - return ret; -} - -static inline int -_generic_set_opp_clk_only(struct device *dev, struct clk *clk, - unsigned long old_freq, unsigned long freq) -{ - int ret; - - ret = clk_set_rate(clk, freq); - if (ret) { - dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, - ret); - } - - return ret; -} - -static int _generic_set_opp_regulator(const struct opp_table *opp_table, - struct device *dev, - unsigned long old_freq, - unsigned long freq, - struct dev_pm_opp_supply *old_supply, - struct dev_pm_opp_supply *new_supply) -{ - struct regulator *reg = opp_table->regulators[0]; - int ret; - - /* This function only supports single regulator per device */ - if (WARN_ON(opp_table->regulator_count > 1)) { - dev_err(dev, "multiple regulators are not supported\n"); - return -EINVAL; - } - - /* Scaling up? Scale voltage before frequency */ - if (freq > old_freq) { - ret = _set_opp_voltage(dev, reg, new_supply); - if (ret) - goto restore_voltage; - } - - /* Change frequency */ - ret = _generic_set_opp_clk_only(dev, opp_table->clk, old_freq, freq); - if (ret) - goto restore_voltage; - - /* Scaling down? Scale voltage after frequency */ - if (freq < old_freq) { - ret = _set_opp_voltage(dev, reg, new_supply); - if (ret) - goto restore_freq; - } - - return 0; - -restore_freq: - if (_generic_set_opp_clk_only(dev, opp_table->clk, freq, old_freq)) - dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n", - __func__, old_freq); -restore_voltage: - /* This shouldn't harm even if the voltages weren't updated earlier */ - if (old_supply) - _set_opp_voltage(dev, reg, old_supply); - - return ret; -} - -/** - * dev_pm_opp_set_rate() - Configure new OPP based on frequency - * @dev: device for which we do this operation - * @target_freq: frequency to achieve - * - * This configures the power-supplies and clock source to the levels specified - * by the OPP corresponding to the target_freq. - */ -int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) -{ - struct opp_table *opp_table; - unsigned long freq, old_freq; - struct dev_pm_opp *old_opp, *opp; - struct clk *clk; - int ret, size; - - if (unlikely(!target_freq)) { - dev_err(dev, "%s: Invalid target frequency %lu\n", __func__, - target_freq); - return -EINVAL; - } - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) { - dev_err(dev, "%s: device opp doesn't exist\n", __func__); - return PTR_ERR(opp_table); - } - - clk = opp_table->clk; - if (IS_ERR(clk)) { - dev_err(dev, "%s: No clock available for the device\n", - __func__); - ret = PTR_ERR(clk); - goto put_opp_table; - } - - freq = clk_round_rate(clk, target_freq); - if ((long)freq <= 0) - freq = target_freq; - - old_freq = clk_get_rate(clk); - - /* Return early if nothing to do */ - if (old_freq == freq) { - dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n", - __func__, freq); - ret = 0; - goto put_opp_table; - } - - old_opp = _find_freq_ceil(opp_table, &old_freq); - if (IS_ERR(old_opp)) { - dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n", - __func__, old_freq, PTR_ERR(old_opp)); - } - - opp = _find_freq_ceil(opp_table, &freq); - if (IS_ERR(opp)) { - ret = PTR_ERR(opp); - dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", - __func__, freq, ret); - goto put_old_opp; - } - - dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__, - old_freq, freq); - - /* Only frequency scaling */ - if (!opp_table->regulators) { - ret = _generic_set_opp_clk_only(dev, clk, old_freq, freq); - } else if (!opp_table->set_opp) { - ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq, - IS_ERR(old_opp) ? NULL : old_opp->supplies, - opp->supplies); - } else { - struct dev_pm_set_opp_data *data; - - data = opp_table->set_opp_data; - data->regulators = opp_table->regulators; - data->regulator_count = opp_table->regulator_count; - data->clk = clk; - data->dev = dev; - - data->old_opp.rate = old_freq; - size = sizeof(*opp->supplies) * opp_table->regulator_count; - if (IS_ERR(old_opp)) - memset(data->old_opp.supplies, 0, size); - else - memcpy(data->old_opp.supplies, old_opp->supplies, size); - - data->new_opp.rate = freq; - memcpy(data->new_opp.supplies, opp->supplies, size); - - ret = opp_table->set_opp(data); - } - - dev_pm_opp_put(opp); -put_old_opp: - if (!IS_ERR(old_opp)) - dev_pm_opp_put(old_opp); -put_opp_table: - dev_pm_opp_put_opp_table(opp_table); - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); - -/* OPP-dev Helpers */ -static void _remove_opp_dev(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ - opp_debug_unregister(opp_dev, opp_table); - list_del(&opp_dev->node); - kfree(opp_dev); -} - -struct opp_device *_add_opp_dev(const struct device *dev, - struct opp_table *opp_table) -{ - struct opp_device *opp_dev; - int ret; - - opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL); - if (!opp_dev) - return NULL; - - /* Initialize opp-dev */ - opp_dev->dev = dev; - list_add(&opp_dev->node, &opp_table->dev_list); - - /* Create debugfs entries for the opp_table */ - ret = opp_debug_register(opp_dev, opp_table); - if (ret) - dev_err(dev, "%s: Failed to register opp debugfs (%d)\n", - __func__, ret); - - return opp_dev; -} - -static struct opp_table *_allocate_opp_table(struct device *dev) -{ - struct opp_table *opp_table; - struct opp_device *opp_dev; - int ret; - - /* - * Allocate a new OPP table. In the infrequent case where a new - * device is needed to be added, we pay this penalty. - */ - opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL); - if (!opp_table) - return NULL; - - INIT_LIST_HEAD(&opp_table->dev_list); - - opp_dev = _add_opp_dev(dev, opp_table); - if (!opp_dev) { - kfree(opp_table); - return NULL; - } - - _of_init_opp_table(opp_table, dev); - - /* Find clk for the device */ - opp_table->clk = clk_get(dev, NULL); - if (IS_ERR(opp_table->clk)) { - ret = PTR_ERR(opp_table->clk); - if (ret != -EPROBE_DEFER) - dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, - ret); - } - - BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head); - INIT_LIST_HEAD(&opp_table->opp_list); - mutex_init(&opp_table->lock); - kref_init(&opp_table->kref); - - /* Secure the device table modification */ - list_add(&opp_table->node, &opp_tables); - return opp_table; -} - -void _get_opp_table_kref(struct opp_table *opp_table) -{ - kref_get(&opp_table->kref); -} - -struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) -{ - struct opp_table *opp_table; - - /* Hold our table modification lock here */ - mutex_lock(&opp_table_lock); - - opp_table = _find_opp_table_unlocked(dev); - if (!IS_ERR(opp_table)) - goto unlock; - - opp_table = _allocate_opp_table(dev); - -unlock: - mutex_unlock(&opp_table_lock); - - return opp_table; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table); - -static void _opp_table_kref_release(struct kref *kref) -{ - struct opp_table *opp_table = container_of(kref, struct opp_table, kref); - struct opp_device *opp_dev; - - /* Release clk */ - if (!IS_ERR(opp_table->clk)) - clk_put(opp_table->clk); - - opp_dev = list_first_entry(&opp_table->dev_list, struct opp_device, - node); - - _remove_opp_dev(opp_dev, opp_table); - - /* dev_list must be empty now */ - WARN_ON(!list_empty(&opp_table->dev_list)); - - mutex_destroy(&opp_table->lock); - list_del(&opp_table->node); - kfree(opp_table); - - mutex_unlock(&opp_table_lock); -} - -void dev_pm_opp_put_opp_table(struct opp_table *opp_table) -{ - kref_put_mutex(&opp_table->kref, _opp_table_kref_release, - &opp_table_lock); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); - -void _opp_free(struct dev_pm_opp *opp) -{ - kfree(opp); -} - -static void _opp_kref_release(struct kref *kref) -{ - struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref); - struct opp_table *opp_table = opp->opp_table; - - /* - * Notify the changes in the availability of the operable - * frequency/voltage list. - */ - blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp); - opp_debug_remove_one(opp); - list_del(&opp->node); - kfree(opp); - - mutex_unlock(&opp_table->lock); - dev_pm_opp_put_opp_table(opp_table); -} - -static void dev_pm_opp_get(struct dev_pm_opp *opp) -{ - kref_get(&opp->kref); -} - -void dev_pm_opp_put(struct dev_pm_opp *opp) -{ - kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put); - -/** - * dev_pm_opp_remove() - Remove an OPP from OPP table - * @dev: device for which we do this operation - * @freq: OPP to remove with matching 'freq' - * - * This function removes an opp from the opp table. - */ -void dev_pm_opp_remove(struct device *dev, unsigned long freq) -{ - struct dev_pm_opp *opp; - struct opp_table *opp_table; - bool found = false; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return; - - mutex_lock(&opp_table->lock); - - list_for_each_entry(opp, &opp_table->opp_list, node) { - if (opp->rate == freq) { - found = true; - break; - } - } - - mutex_unlock(&opp_table->lock); - - if (found) { - dev_pm_opp_put(opp); - } else { - dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n", - __func__, freq); - } - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_remove); - -struct dev_pm_opp *_opp_allocate(struct opp_table *table) -{ - struct dev_pm_opp *opp; - int count, supply_size; - - /* Allocate space for at least one supply */ - count = table->regulator_count ? table->regulator_count : 1; - supply_size = sizeof(*opp->supplies) * count; - - /* allocate new OPP node and supplies structures */ - opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL); - if (!opp) - return NULL; - - /* Put the supplies at the end of the OPP structure as an empty array */ - opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); - INIT_LIST_HEAD(&opp->node); - - return opp; -} - -static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, - struct opp_table *opp_table) -{ - struct regulator *reg; - int i; - - for (i = 0; i < opp_table->regulator_count; i++) { - reg = opp_table->regulators[i]; - - if (!regulator_is_supported_voltage(reg, - opp->supplies[i].u_volt_min, - opp->supplies[i].u_volt_max)) { - pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", - __func__, opp->supplies[i].u_volt_min, - opp->supplies[i].u_volt_max); - return false; - } - } - - return true; -} - -/* - * Returns: - * 0: On success. And appropriate error message for duplicate OPPs. - * -EBUSY: For OPP with same freq/volt and is available. The callers of - * _opp_add() must return 0 if they receive -EBUSY from it. This is to make - * sure we don't print error messages unnecessarily if different parts of - * kernel try to initialize the OPP table. - * -EEXIST: For OPP with same freq but different volt or is unavailable. This - * should be considered an error by the callers of _opp_add(). - */ -int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, - struct opp_table *opp_table) -{ - struct dev_pm_opp *opp; - struct list_head *head; - int ret; - - /* - * Insert new OPP in order of increasing frequency and discard if - * already present. - * - * Need to use &opp_table->opp_list in the condition part of the 'for' - * loop, don't replace it with head otherwise it will become an infinite - * loop. - */ - mutex_lock(&opp_table->lock); - head = &opp_table->opp_list; - - list_for_each_entry(opp, &opp_table->opp_list, node) { - if (new_opp->rate > opp->rate) { - head = &opp->node; - continue; - } - - if (new_opp->rate < opp->rate) - break; - - /* Duplicate OPPs */ - dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", - __func__, opp->rate, opp->supplies[0].u_volt, - opp->available, new_opp->rate, - new_opp->supplies[0].u_volt, new_opp->available); - - /* Should we compare voltages for all regulators here ? */ - ret = opp->available && - new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST; - - mutex_unlock(&opp_table->lock); - return ret; - } - - list_add(&new_opp->node, head); - mutex_unlock(&opp_table->lock); - - new_opp->opp_table = opp_table; - kref_init(&new_opp->kref); - - /* Get a reference to the OPP table */ - _get_opp_table_kref(opp_table); - - ret = opp_debug_create_one(new_opp, opp_table); - if (ret) - dev_err(dev, "%s: Failed to register opp to debugfs (%d)\n", - __func__, ret); - - if (!_opp_supported_by_regulators(new_opp, opp_table)) { - new_opp->available = false; - dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n", - __func__, new_opp->rate); - } - - return 0; -} - -/** - * _opp_add_v1() - Allocate a OPP based on v1 bindings. - * @opp_table: OPP table - * @dev: device for which we do this operation - * @freq: Frequency in Hz for this OPP - * @u_volt: Voltage in uVolts for this OPP - * @dynamic: Dynamically added OPPs. - * - * This function adds an opp definition to the opp table and returns status. - * The opp is made available by default and it can be controlled using - * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove. - * - * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table - * and freed by dev_pm_opp_of_remove_table. - * - * Return: - * 0 On success OR - * Duplicate OPPs (both freq and volt are same) and opp->available - * -EEXIST Freq are same and volt are different OR - * Duplicate OPPs (both freq and volt are same) and !opp->available - * -ENOMEM Memory allocation failure - */ -int _opp_add_v1(struct opp_table *opp_table, struct device *dev, - unsigned long freq, long u_volt, bool dynamic) -{ - struct dev_pm_opp *new_opp; - unsigned long tol; - int ret; - - new_opp = _opp_allocate(opp_table); - if (!new_opp) - return -ENOMEM; - - /* populate the opp table */ - new_opp->rate = freq; - tol = u_volt * opp_table->voltage_tolerance_v1 / 100; - new_opp->supplies[0].u_volt = u_volt; - new_opp->supplies[0].u_volt_min = u_volt - tol; - new_opp->supplies[0].u_volt_max = u_volt + tol; - new_opp->available = true; - new_opp->dynamic = dynamic; - - ret = _opp_add(dev, new_opp, opp_table); - if (ret) { - /* Don't return error for duplicate OPPs */ - if (ret == -EBUSY) - ret = 0; - goto free_opp; - } - - /* - * Notify the changes in the availability of the operable - * frequency/voltage list. - */ - blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); - return 0; - -free_opp: - _opp_free(new_opp); - - return ret; -} - -/** - * dev_pm_opp_set_supported_hw() - Set supported platforms - * @dev: Device for which supported-hw has to be set. - * @versions: Array of hierarchy of versions to match. - * @count: Number of elements in the array. - * - * This is required only for the V2 bindings, and it enables a platform to - * specify the hierarchy of versions it supports. OPP layer will then enable - * OPPs, which are available for those versions, based on its 'opp-supported-hw' - * property. - */ -struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, - const u32 *versions, unsigned int count) -{ - struct opp_table *opp_table; - int ret; - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return ERR_PTR(-ENOMEM); - - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - /* Do we already have a version hierarchy associated with opp_table? */ - if (opp_table->supported_hw) { - dev_err(dev, "%s: Already have supported hardware list\n", - __func__); - ret = -EBUSY; - goto err; - } - - opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions), - GFP_KERNEL); - if (!opp_table->supported_hw) { - ret = -ENOMEM; - goto err; - } - - opp_table->supported_hw_count = count; - - return opp_table; - -err: - dev_pm_opp_put_opp_table(opp_table); - - return ERR_PTR(ret); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw); - -/** - * dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw - * @opp_table: OPP table returned by dev_pm_opp_set_supported_hw(). - * - * This is required only for the V2 bindings, and is called for a matching - * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure - * will not be freed. - */ -void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) -{ - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - if (!opp_table->supported_hw) { - pr_err("%s: Doesn't have supported hardware list\n", - __func__); - return; - } - - kfree(opp_table->supported_hw); - opp_table->supported_hw = NULL; - opp_table->supported_hw_count = 0; - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw); - -/** - * dev_pm_opp_set_prop_name() - Set prop-extn name - * @dev: Device for which the prop-name has to be set. - * @name: name to postfix to properties. - * - * This is required only for the V2 bindings, and it enables a platform to - * specify the extn to be used for certain property names. The properties to - * which the extension will apply are opp-microvolt and opp-microamp. OPP core - * should postfix the property name with -<name> while looking for them. - */ -struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name) -{ - struct opp_table *opp_table; - int ret; - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return ERR_PTR(-ENOMEM); - - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - /* Do we already have a prop-name associated with opp_table? */ - if (opp_table->prop_name) { - dev_err(dev, "%s: Already have prop-name %s\n", __func__, - opp_table->prop_name); - ret = -EBUSY; - goto err; - } - - opp_table->prop_name = kstrdup(name, GFP_KERNEL); - if (!opp_table->prop_name) { - ret = -ENOMEM; - goto err; - } - - return opp_table; - -err: - dev_pm_opp_put_opp_table(opp_table); - - return ERR_PTR(ret); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name); - -/** - * dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name - * @opp_table: OPP table returned by dev_pm_opp_set_prop_name(). - * - * This is required only for the V2 bindings, and is called for a matching - * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure - * will not be freed. - */ -void dev_pm_opp_put_prop_name(struct opp_table *opp_table) -{ - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - if (!opp_table->prop_name) { - pr_err("%s: Doesn't have a prop-name\n", __func__); - return; - } - - kfree(opp_table->prop_name); - opp_table->prop_name = NULL; - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name); - -static int _allocate_set_opp_data(struct opp_table *opp_table) -{ - struct dev_pm_set_opp_data *data; - int len, count = opp_table->regulator_count; - - if (WARN_ON(!count)) - return -EINVAL; - - /* space for set_opp_data */ - len = sizeof(*data); - - /* space for old_opp.supplies and new_opp.supplies */ - len += 2 * sizeof(struct dev_pm_opp_supply) * count; - - data = kzalloc(len, GFP_KERNEL); - if (!data) - return -ENOMEM; - - data->old_opp.supplies = (void *)(data + 1); - data->new_opp.supplies = data->old_opp.supplies + count; - - opp_table->set_opp_data = data; - - return 0; -} - -static void _free_set_opp_data(struct opp_table *opp_table) -{ - kfree(opp_table->set_opp_data); - opp_table->set_opp_data = NULL; -} - -/** - * dev_pm_opp_set_regulators() - Set regulator names for the device - * @dev: Device for which regulator name is being set. - * @names: Array of pointers to the names of the regulator. - * @count: Number of regulators. - * - * In order to support OPP switching, OPP layer needs to know the name of the - * device's regulators, as the core would be required to switch voltages as - * well. - * - * This must be called before any OPPs are initialized for the device. - */ -struct opp_table *dev_pm_opp_set_regulators(struct device *dev, - const char * const names[], - unsigned int count) -{ - struct opp_table *opp_table; - struct regulator *reg; - int ret, i; - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return ERR_PTR(-ENOMEM); - - /* This should be called before OPPs are initialized */ - if (WARN_ON(!list_empty(&opp_table->opp_list))) { - ret = -EBUSY; - goto err; - } - - /* Already have regulators set */ - if (opp_table->regulators) { - ret = -EBUSY; - goto err; - } - - opp_table->regulators = kmalloc_array(count, - sizeof(*opp_table->regulators), - GFP_KERNEL); - if (!opp_table->regulators) { - ret = -ENOMEM; - goto err; - } - - for (i = 0; i < count; i++) { - reg = regulator_get_optional(dev, names[i]); - if (IS_ERR(reg)) { - ret = PTR_ERR(reg); - if (ret != -EPROBE_DEFER) - dev_err(dev, "%s: no regulator (%s) found: %d\n", - __func__, names[i], ret); - goto free_regulators; - } - - opp_table->regulators[i] = reg; - } - - opp_table->regulator_count = count; - - /* Allocate block only once to pass to set_opp() routines */ - ret = _allocate_set_opp_data(opp_table); - if (ret) - goto free_regulators; - - return opp_table; - -free_regulators: - while (i != 0) - regulator_put(opp_table->regulators[--i]); - - kfree(opp_table->regulators); - opp_table->regulators = NULL; - opp_table->regulator_count = 0; -err: - dev_pm_opp_put_opp_table(opp_table); - - return ERR_PTR(ret); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators); - -/** - * dev_pm_opp_put_regulators() - Releases resources blocked for regulator - * @opp_table: OPP table returned from dev_pm_opp_set_regulators(). - */ -void dev_pm_opp_put_regulators(struct opp_table *opp_table) -{ - int i; - - if (!opp_table->regulators) { - pr_err("%s: Doesn't have regulators set\n", __func__); - return; - } - - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - for (i = opp_table->regulator_count - 1; i >= 0; i--) - regulator_put(opp_table->regulators[i]); - - _free_set_opp_data(opp_table); - - kfree(opp_table->regulators); - opp_table->regulators = NULL; - opp_table->regulator_count = 0; - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators); - -/** - * dev_pm_opp_set_clkname() - Set clk name for the device - * @dev: Device for which clk name is being set. - * @name: Clk name. - * - * In order to support OPP switching, OPP layer needs to get pointer to the - * clock for the device. Simple cases work fine without using this routine (i.e. - * by passing connection-id as NULL), but for a device with multiple clocks - * available, the OPP core needs to know the exact name of the clk to use. - * - * This must be called before any OPPs are initialized for the device. - */ -struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name) -{ - struct opp_table *opp_table; - int ret; - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return ERR_PTR(-ENOMEM); - - /* This should be called before OPPs are initialized */ - if (WARN_ON(!list_empty(&opp_table->opp_list))) { - ret = -EBUSY; - goto err; - } - - /* Already have default clk set, free it */ - if (!IS_ERR(opp_table->clk)) - clk_put(opp_table->clk); - - /* Find clk for the device */ - opp_table->clk = clk_get(dev, name); - if (IS_ERR(opp_table->clk)) { - ret = PTR_ERR(opp_table->clk); - if (ret != -EPROBE_DEFER) { - dev_err(dev, "%s: Couldn't find clock: %d\n", __func__, - ret); - } - goto err; - } - - return opp_table; - -err: - dev_pm_opp_put_opp_table(opp_table); - - return ERR_PTR(ret); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname); - -/** - * dev_pm_opp_put_clkname() - Releases resources blocked for clk. - * @opp_table: OPP table returned from dev_pm_opp_set_clkname(). - */ -void dev_pm_opp_put_clkname(struct opp_table *opp_table) -{ - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - clk_put(opp_table->clk); - opp_table->clk = ERR_PTR(-EINVAL); - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname); - -/** - * dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper - * @dev: Device for which the helper is getting registered. - * @set_opp: Custom set OPP helper. - * - * This is useful to support complex platforms (like platforms with multiple - * regulators per device), instead of the generic OPP set rate helper. - * - * This must be called before any OPPs are initialized for the device. - */ -struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, - int (*set_opp)(struct dev_pm_set_opp_data *data)) -{ - struct opp_table *opp_table; - int ret; - - if (!set_opp) - return ERR_PTR(-EINVAL); - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return ERR_PTR(-ENOMEM); - - /* This should be called before OPPs are initialized */ - if (WARN_ON(!list_empty(&opp_table->opp_list))) { - ret = -EBUSY; - goto err; - } - - /* Already have custom set_opp helper */ - if (WARN_ON(opp_table->set_opp)) { - ret = -EBUSY; - goto err; - } - - opp_table->set_opp = set_opp; - - return opp_table; - -err: - dev_pm_opp_put_opp_table(opp_table); - - return ERR_PTR(ret); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper); - -/** - * dev_pm_opp_register_put_opp_helper() - Releases resources blocked for - * set_opp helper - * @opp_table: OPP table returned from dev_pm_opp_register_set_opp_helper(). - * - * Release resources blocked for platform specific set_opp helper. - */ -void dev_pm_opp_register_put_opp_helper(struct opp_table *opp_table) -{ - if (!opp_table->set_opp) { - pr_err("%s: Doesn't have custom set_opp helper set\n", - __func__); - return; - } - - /* Make sure there are no concurrent readers while updating opp_table */ - WARN_ON(!list_empty(&opp_table->opp_list)); - - opp_table->set_opp = NULL; - - dev_pm_opp_put_opp_table(opp_table); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_register_put_opp_helper); - -/** - * dev_pm_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 table and returns status. - * The opp is made available by default and it can be controlled using - * dev_pm_opp_enable/disable functions. - * - * Return: - * 0 On success OR - * Duplicate OPPs (both freq and volt are same) and opp->available - * -EEXIST Freq are same and volt are different OR - * Duplicate OPPs (both freq and volt are same) and !opp->available - * -ENOMEM Memory allocation failure - */ -int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) -{ - struct opp_table *opp_table; - int ret; - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return -ENOMEM; - - ret = _opp_add_v1(opp_table, dev, freq, u_volt, true); - - dev_pm_opp_put_opp_table(opp_table); - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_add); - -/** - * _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, opp_{enable,disable} share a common logic - * which is isolated here. - * - * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the - * copy operation, returns 0 if no modification was done OR modification was - * successful. - */ -static int _opp_set_availability(struct device *dev, unsigned long freq, - bool availability_req) -{ - struct opp_table *opp_table; - struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); - int r = 0; - - /* Find the opp_table */ - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) { - r = PTR_ERR(opp_table); - dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); - return r; - } - - mutex_lock(&opp_table->lock); - - /* Do we have the frequency? */ - list_for_each_entry(tmp_opp, &opp_table->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; - - opp->available = availability_req; - - dev_pm_opp_get(opp); - mutex_unlock(&opp_table->lock); - - /* Notify the change of the OPP availability */ - if (availability_req) - blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE, - opp); - else - blocking_notifier_call_chain(&opp_table->head, - OPP_EVENT_DISABLE, opp); - - dev_pm_opp_put(opp); - goto put_table; - -unlock: - mutex_unlock(&opp_table->lock); -put_table: - dev_pm_opp_put_opp_table(opp_table); - return r; -} - -/** - * dev_pm_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 dev_pm_opp_disable. - * - * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the - * copy operation, returns 0 if no modification was done OR modification was - * successful. - */ -int dev_pm_opp_enable(struct device *dev, unsigned long freq) -{ - return _opp_set_availability(dev, freq, true); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_enable); - -/** - * dev_pm_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 dev_pm_opp_enable). - * - * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the - * copy operation, returns 0 if no modification was done OR modification was - * successful. - */ -int dev_pm_opp_disable(struct device *dev, unsigned long freq) -{ - return _opp_set_availability(dev, freq, false); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_disable); - -/** - * dev_pm_opp_register_notifier() - Register OPP notifier for the device - * @dev: Device for which notifier needs to be registered - * @nb: Notifier block to be registered - * - * Return: 0 on success or a negative error value. - */ -int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb) -{ - struct opp_table *opp_table; - int ret; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return PTR_ERR(opp_table); - - ret = blocking_notifier_chain_register(&opp_table->head, nb); - - dev_pm_opp_put_opp_table(opp_table); - - return ret; -} -EXPORT_SYMBOL(dev_pm_opp_register_notifier); - -/** - * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device - * @dev: Device for which notifier needs to be unregistered - * @nb: Notifier block to be unregistered - * - * Return: 0 on success or a negative error value. - */ -int dev_pm_opp_unregister_notifier(struct device *dev, - struct notifier_block *nb) -{ - struct opp_table *opp_table; - int ret; - - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) - return PTR_ERR(opp_table); - - ret = blocking_notifier_chain_unregister(&opp_table->head, nb); - - dev_pm_opp_put_opp_table(opp_table); - - return ret; -} -EXPORT_SYMBOL(dev_pm_opp_unregister_notifier); - -/* - * Free OPPs either created using static entries present in DT or even the - * dynamically added entries based on remove_all param. - */ -void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, - bool remove_all) -{ - struct dev_pm_opp *opp, *tmp; - - /* Find if opp_table manages a single device */ - if (list_is_singular(&opp_table->dev_list)) { - /* Free static OPPs */ - list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) { - if (remove_all || !opp->dynamic) - dev_pm_opp_put(opp); - } - } else { - _remove_opp_dev(_find_opp_dev(dev, opp_table), opp_table); - } -} - -void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all) -{ - struct opp_table *opp_table; - - /* Check for existing table for 'dev' */ - opp_table = _find_opp_table(dev); - if (IS_ERR(opp_table)) { - int error = PTR_ERR(opp_table); - - if (error != -ENODEV) - WARN(1, "%s: opp_table: %d\n", - IS_ERR_OR_NULL(dev) ? - "Invalid device" : dev_name(dev), - error); - return; - } - - _dev_pm_opp_remove_table(opp_table, dev, remove_all); - - dev_pm_opp_put_opp_table(opp_table); -} - -/** - * dev_pm_opp_remove_table() - Free all OPPs associated with the device - * @dev: device pointer used to lookup OPP table. - * - * Free both OPPs created using static entries present in DT and the - * dynamically added entries. - */ -void dev_pm_opp_remove_table(struct device *dev) -{ - _dev_pm_opp_find_and_remove_table(dev, true); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c deleted file mode 100644 index 2d87bc1adf38..000000000000 --- a/drivers/base/power/opp/cpu.c +++ /dev/null @@ -1,236 +0,0 @@ -/* - * Generic OPP helper interface for CPU device - * - * Copyright (C) 2009-2014 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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/cpu.h> -#include <linux/cpufreq.h> -#include <linux/err.h> -#include <linux/errno.h> -#include <linux/export.h> -#include <linux/slab.h> - -#include "opp.h" - -#ifdef CONFIG_CPU_FREQ - -/** - * dev_pm_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 table 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. - */ -int dev_pm_opp_init_cpufreq_table(struct device *dev, - struct cpufreq_frequency_table **table) -{ - struct dev_pm_opp *opp; - struct cpufreq_frequency_table *freq_table = NULL; - int i, max_opps, ret = 0; - unsigned long rate; - - max_opps = dev_pm_opp_get_opp_count(dev); - if (max_opps <= 0) - return max_opps ? max_opps : -ENODATA; - - freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_ATOMIC); - if (!freq_table) - return -ENOMEM; - - for (i = 0, rate = 0; i < max_opps; i++, rate++) { - /* find next rate */ - opp = dev_pm_opp_find_freq_ceil(dev, &rate); - if (IS_ERR(opp)) { - ret = PTR_ERR(opp); - goto out; - } - freq_table[i].driver_data = i; - freq_table[i].frequency = rate / 1000; - - /* Is Boost/turbo opp ? */ - if (dev_pm_opp_is_turbo(opp)) - freq_table[i].flags = CPUFREQ_BOOST_FREQ; - - dev_pm_opp_put(opp); - } - - freq_table[i].driver_data = i; - freq_table[i].frequency = CPUFREQ_TABLE_END; - - *table = &freq_table[0]; - -out: - if (ret) - kfree(freq_table); - - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table); - -/** - * dev_pm_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 dev_pm_opp_init_cpufreq_table - */ -void dev_pm_opp_free_cpufreq_table(struct device *dev, - struct cpufreq_frequency_table **table) -{ - if (!table) - return; - - kfree(*table); - *table = NULL; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table); -#endif /* CONFIG_CPU_FREQ */ - -void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of) -{ - struct device *cpu_dev; - int cpu; - - WARN_ON(cpumask_empty(cpumask)); - - for_each_cpu(cpu, cpumask) { - cpu_dev = get_cpu_device(cpu); - if (!cpu_dev) { - pr_err("%s: failed to get cpu%d device\n", __func__, - cpu); - continue; - } - - if (of) - dev_pm_opp_of_remove_table(cpu_dev); - else - dev_pm_opp_remove_table(cpu_dev); - } -} - -/** - * dev_pm_opp_cpumask_remove_table() - Removes OPP table for @cpumask - * @cpumask: cpumask for which OPP table needs to be removed - * - * This removes the OPP tables for CPUs present in the @cpumask. - * This should be used to remove all the OPPs entries associated with - * the cpus in @cpumask. - */ -void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask) -{ - _dev_pm_opp_cpumask_remove_table(cpumask, false); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table); - -/** - * dev_pm_opp_set_sharing_cpus() - Mark OPP table as shared by few CPUs - * @cpu_dev: CPU device for which we do this operation - * @cpumask: cpumask of the CPUs which share the OPP table with @cpu_dev - * - * This marks OPP table of the @cpu_dev as shared by the CPUs present in - * @cpumask. - * - * Returns -ENODEV if OPP table isn't already present. - */ -int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, - const struct cpumask *cpumask) -{ - struct opp_device *opp_dev; - struct opp_table *opp_table; - struct device *dev; - int cpu, ret = 0; - - opp_table = _find_opp_table(cpu_dev); - if (IS_ERR(opp_table)) - return PTR_ERR(opp_table); - - for_each_cpu(cpu, cpumask) { - if (cpu == cpu_dev->id) - continue; - - dev = get_cpu_device(cpu); - if (!dev) { - dev_err(cpu_dev, "%s: failed to get cpu%d device\n", - __func__, cpu); - continue; - } - - opp_dev = _add_opp_dev(dev, opp_table); - if (!opp_dev) { - dev_err(dev, "%s: failed to add opp-dev for cpu%d device\n", - __func__, cpu); - continue; - } - - /* Mark opp-table as multiple CPUs are sharing it now */ - opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED; - } - - dev_pm_opp_put_opp_table(opp_table); - - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus); - -/** - * dev_pm_opp_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with @cpu_dev - * @cpu_dev: CPU device for which we do this operation - * @cpumask: cpumask to update with information of sharing CPUs - * - * This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev. - * - * Returns -ENODEV if OPP table isn't already present and -EINVAL if the OPP - * table's status is access-unknown. - */ -int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask) -{ - struct opp_device *opp_dev; - struct opp_table *opp_table; - int ret = 0; - - opp_table = _find_opp_table(cpu_dev); - if (IS_ERR(opp_table)) - return PTR_ERR(opp_table); - - if (opp_table->shared_opp == OPP_TABLE_ACCESS_UNKNOWN) { - ret = -EINVAL; - goto put_opp_table; - } - - cpumask_clear(cpumask); - - if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) { - list_for_each_entry(opp_dev, &opp_table->dev_list, node) - cpumask_set_cpu(opp_dev->dev->id, cpumask); - } else { - cpumask_set_cpu(cpu_dev->id, cpumask); - } - -put_opp_table: - dev_pm_opp_put_opp_table(opp_table); - - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_get_sharing_cpus); diff --git a/drivers/base/power/opp/debugfs.c b/drivers/base/power/opp/debugfs.c deleted file mode 100644 index 81cf120fcf43..000000000000 --- a/drivers/base/power/opp/debugfs.c +++ /dev/null @@ -1,249 +0,0 @@ -/* - * Generic OPP debugfs interface - * - * Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/debugfs.h> -#include <linux/device.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/limits.h> -#include <linux/slab.h> - -#include "opp.h" - -static struct dentry *rootdir; - -static void opp_set_dev_name(const struct device *dev, char *name) -{ - if (dev->parent) - snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent), - dev_name(dev)); - else - snprintf(name, NAME_MAX, "%s", dev_name(dev)); -} - -void opp_debug_remove_one(struct dev_pm_opp *opp) -{ - debugfs_remove_recursive(opp->dentry); -} - -static bool opp_debug_create_supplies(struct dev_pm_opp *opp, - struct opp_table *opp_table, - struct dentry *pdentry) -{ - struct dentry *d; - int i; - char *name; - - for (i = 0; i < opp_table->regulator_count; i++) { - name = kasprintf(GFP_KERNEL, "supply-%d", i); - - /* Create per-opp directory */ - d = debugfs_create_dir(name, pdentry); - - kfree(name); - - if (!d) - return false; - - if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, - &opp->supplies[i].u_volt)) - return false; - - if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, - &opp->supplies[i].u_volt_min)) - return false; - - if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, - &opp->supplies[i].u_volt_max)) - return false; - - if (!debugfs_create_ulong("u_amp", S_IRUGO, d, - &opp->supplies[i].u_amp)) - return false; - } - - return true; -} - -int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) -{ - struct dentry *pdentry = opp_table->dentry; - struct dentry *d; - char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */ - - /* Rate is unique to each OPP, use it to give opp-name */ - snprintf(name, sizeof(name), "opp:%lu", opp->rate); - - /* Create per-opp directory */ - d = debugfs_create_dir(name, pdentry); - if (!d) - return -ENOMEM; - - if (!debugfs_create_bool("available", S_IRUGO, d, &opp->available)) - return -ENOMEM; - - if (!debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic)) - return -ENOMEM; - - if (!debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo)) - return -ENOMEM; - - if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend)) - return -ENOMEM; - - if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate)) - return -ENOMEM; - - if (!opp_debug_create_supplies(opp, opp_table, d)) - return -ENOMEM; - - if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, - &opp->clock_latency_ns)) - return -ENOMEM; - - opp->dentry = d; - return 0; -} - -static int opp_list_debug_create_dir(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ - const struct device *dev = opp_dev->dev; - struct dentry *d; - - opp_set_dev_name(dev, opp_table->dentry_name); - - /* Create device specific directory */ - d = debugfs_create_dir(opp_table->dentry_name, rootdir); - if (!d) { - dev_err(dev, "%s: Failed to create debugfs dir\n", __func__); - return -ENOMEM; - } - - opp_dev->dentry = d; - opp_table->dentry = d; - - return 0; -} - -static int opp_list_debug_create_link(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ - const struct device *dev = opp_dev->dev; - char name[NAME_MAX]; - struct dentry *d; - - opp_set_dev_name(opp_dev->dev, name); - - /* Create device specific directory link */ - d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name); - if (!d) { - dev_err(dev, "%s: Failed to create link\n", __func__); - return -ENOMEM; - } - - opp_dev->dentry = d; - - return 0; -} - -/** - * opp_debug_register - add a device opp node to the debugfs 'opp' directory - * @opp_dev: opp-dev pointer for device - * @opp_table: the device-opp being added - * - * Dynamically adds device specific directory in debugfs 'opp' directory. If the - * device-opp is shared with other devices, then links will be created for all - * devices except the first. - * - * Return: 0 on success, otherwise negative error. - */ -int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table) -{ - if (!rootdir) { - pr_debug("%s: Uninitialized rootdir\n", __func__); - return -EINVAL; - } - - if (opp_table->dentry) - return opp_list_debug_create_link(opp_dev, opp_table); - - return opp_list_debug_create_dir(opp_dev, opp_table); -} - -static void opp_migrate_dentry(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ - struct opp_device *new_dev; - const struct device *dev; - struct dentry *dentry; - - /* Look for next opp-dev */ - list_for_each_entry(new_dev, &opp_table->dev_list, node) - if (new_dev != opp_dev) - break; - - /* new_dev is guaranteed to be valid here */ - dev = new_dev->dev; - debugfs_remove_recursive(new_dev->dentry); - - opp_set_dev_name(dev, opp_table->dentry_name); - - dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir, - opp_table->dentry_name); - if (!dentry) { - dev_err(dev, "%s: Failed to rename link from: %s to %s\n", - __func__, dev_name(opp_dev->dev), dev_name(dev)); - return; - } - - new_dev->dentry = dentry; - opp_table->dentry = dentry; -} - -/** - * opp_debug_unregister - remove a device opp node from debugfs opp directory - * @opp_dev: opp-dev pointer for device - * @opp_table: the device-opp being removed - * - * Dynamically removes device specific directory from debugfs 'opp' directory. - */ -void opp_debug_unregister(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ - if (opp_dev->dentry == opp_table->dentry) { - /* Move the real dentry object under another device */ - if (!list_is_singular(&opp_table->dev_list)) { - opp_migrate_dentry(opp_dev, opp_table); - goto out; - } - opp_table->dentry = NULL; - } - - debugfs_remove_recursive(opp_dev->dentry); - -out: - opp_dev->dentry = NULL; -} - -static int __init opp_debug_init(void) -{ - /* Create /sys/kernel/debug/opp directory */ - rootdir = debugfs_create_dir("opp", NULL); - if (!rootdir) { - pr_err("%s: Failed to create root directory\n", __func__); - return -ENOMEM; - } - - return 0; -} -core_initcall(opp_debug_init); diff --git a/drivers/base/power/opp/of.c b/drivers/base/power/opp/of.c deleted file mode 100644 index 0b718886479b..000000000000 --- a/drivers/base/power/opp/of.c +++ /dev/null @@ -1,633 +0,0 @@ -/* - * Generic OPP OF helpers - * - * 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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/cpu.h> -#include <linux/errno.h> -#include <linux/device.h> -#include <linux/of.h> -#include <linux/slab.h> -#include <linux/export.h> - -#include "opp.h" - -static struct opp_table *_managed_opp(const struct device_node *np) -{ - struct opp_table *opp_table, *managed_table = NULL; - - mutex_lock(&opp_table_lock); - - list_for_each_entry(opp_table, &opp_tables, node) { - if (opp_table->np == np) { - /* - * Multiple devices can point to the same OPP table and - * so will have same node-pointer, np. - * - * But the OPPs will be considered as shared only if the - * OPP table contains a "opp-shared" property. - */ - if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) { - _get_opp_table_kref(opp_table); - managed_table = opp_table; - } - - break; - } - } - - mutex_unlock(&opp_table_lock); - - return managed_table; -} - -void _of_init_opp_table(struct opp_table *opp_table, struct device *dev) -{ - struct device_node *np; - - /* - * Only required for backward compatibility with v1 bindings, but isn't - * harmful for other cases. And so we do it unconditionally. - */ - np = of_node_get(dev->of_node); - if (np) { - u32 val; - - if (!of_property_read_u32(np, "clock-latency", &val)) - opp_table->clock_latency_ns_max = val; - of_property_read_u32(np, "voltage-tolerance", - &opp_table->voltage_tolerance_v1); - of_node_put(np); - } -} - -static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table, - struct device_node *np) -{ - unsigned int count = opp_table->supported_hw_count; - u32 version; - int ret; - - if (!opp_table->supported_hw) { - /* - * In the case that no supported_hw has been set by the - * platform but there is an opp-supported-hw value set for - * an OPP then the OPP should not be enabled as there is - * no way to see if the hardware supports it. - */ - if (of_find_property(np, "opp-supported-hw", NULL)) - return false; - else - return true; - } - - while (count--) { - ret = of_property_read_u32_index(np, "opp-supported-hw", count, - &version); - if (ret) { - dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n", - __func__, count, ret); - return false; - } - - /* Both of these are bitwise masks of the versions */ - if (!(version & opp_table->supported_hw[count])) - return false; - } - - return true; -} - -static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, - struct opp_table *opp_table) -{ - u32 *microvolt, *microamp = NULL; - int supplies, vcount, icount, ret, i, j; - struct property *prop = NULL; - char name[NAME_MAX]; - - supplies = opp_table->regulator_count ? opp_table->regulator_count : 1; - - /* Search for "opp-microvolt-<name>" */ - if (opp_table->prop_name) { - snprintf(name, sizeof(name), "opp-microvolt-%s", - opp_table->prop_name); - prop = of_find_property(opp->np, name, NULL); - } - - if (!prop) { - /* Search for "opp-microvolt" */ - sprintf(name, "opp-microvolt"); - prop = of_find_property(opp->np, name, NULL); - - /* Missing property isn't a problem, but an invalid entry is */ - if (!prop) { - if (!opp_table->regulator_count) - return 0; - - dev_err(dev, "%s: opp-microvolt missing although OPP managing regulators\n", - __func__); - return -EINVAL; - } - } - - vcount = of_property_count_u32_elems(opp->np, name); - if (vcount < 0) { - dev_err(dev, "%s: Invalid %s property (%d)\n", - __func__, name, vcount); - return vcount; - } - - /* There can be one or three elements per supply */ - if (vcount != supplies && vcount != supplies * 3) { - dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n", - __func__, name, vcount, supplies); - return -EINVAL; - } - - microvolt = kmalloc_array(vcount, sizeof(*microvolt), GFP_KERNEL); - if (!microvolt) - return -ENOMEM; - - ret = of_property_read_u32_array(opp->np, name, microvolt, vcount); - if (ret) { - dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret); - ret = -EINVAL; - goto free_microvolt; - } - - /* Search for "opp-microamp-<name>" */ - prop = NULL; - if (opp_table->prop_name) { - snprintf(name, sizeof(name), "opp-microamp-%s", - opp_table->prop_name); - prop = of_find_property(opp->np, name, NULL); - } - - if (!prop) { - /* Search for "opp-microamp" */ - sprintf(name, "opp-microamp"); - prop = of_find_property(opp->np, name, NULL); - } - - if (prop) { - icount = of_property_count_u32_elems(opp->np, name); - if (icount < 0) { - dev_err(dev, "%s: Invalid %s property (%d)\n", __func__, - name, icount); - ret = icount; - goto free_microvolt; - } - - if (icount != supplies) { - dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n", - __func__, name, icount, supplies); - ret = -EINVAL; - goto free_microvolt; - } - - microamp = kmalloc_array(icount, sizeof(*microamp), GFP_KERNEL); - if (!microamp) { - ret = -EINVAL; - goto free_microvolt; - } - - ret = of_property_read_u32_array(opp->np, name, microamp, - icount); - if (ret) { - dev_err(dev, "%s: error parsing %s: %d\n", __func__, - name, ret); - ret = -EINVAL; - goto free_microamp; - } - } - - for (i = 0, j = 0; i < supplies; i++) { - opp->supplies[i].u_volt = microvolt[j++]; - - if (vcount == supplies) { - opp->supplies[i].u_volt_min = opp->supplies[i].u_volt; - opp->supplies[i].u_volt_max = opp->supplies[i].u_volt; - } else { - opp->supplies[i].u_volt_min = microvolt[j++]; - opp->supplies[i].u_volt_max = microvolt[j++]; - } - - if (microamp) - opp->supplies[i].u_amp = microamp[i]; - } - -free_microamp: - kfree(microamp); -free_microvolt: - kfree(microvolt); - - return ret; -} - -/** - * dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT - * entries - * @dev: device pointer used to lookup OPP table. - * - * Free OPPs created using static entries present in DT. - */ -void dev_pm_opp_of_remove_table(struct device *dev) -{ - _dev_pm_opp_find_and_remove_table(dev, false); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table); - -/* Returns opp descriptor node for a device node, caller must - * do of_node_put() */ -static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np) -{ - /* - * There should be only ONE phandle present in "operating-points-v2" - * property. - */ - - return of_parse_phandle(np, "operating-points-v2", 0); -} - -/* Returns opp descriptor node for a device, caller must do of_node_put() */ -struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev) -{ - return _opp_of_get_opp_desc_node(dev->of_node); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node); - -/** - * _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings) - * @opp_table: OPP table - * @dev: device for which we do this operation - * @np: device node - * - * This function adds an opp definition to the opp table and returns status. The - * opp can be controlled using dev_pm_opp_enable/disable functions and may be - * removed by dev_pm_opp_remove. - * - * Return: - * 0 On success OR - * Duplicate OPPs (both freq and volt are same) and opp->available - * -EEXIST Freq are same and volt are different OR - * Duplicate OPPs (both freq and volt are same) and !opp->available - * -ENOMEM Memory allocation failure - * -EINVAL Failed parsing the OPP node - */ -static int _opp_add_static_v2(struct opp_table *opp_table, struct device *dev, - struct device_node *np) -{ - struct dev_pm_opp *new_opp; - u64 rate; - u32 val; - int ret; - - new_opp = _opp_allocate(opp_table); - if (!new_opp) - return -ENOMEM; - - ret = of_property_read_u64(np, "opp-hz", &rate); - if (ret < 0) { - dev_err(dev, "%s: opp-hz not found\n", __func__); - goto free_opp; - } - - /* Check if the OPP supports hardware's hierarchy of versions or not */ - if (!_opp_is_supported(dev, opp_table, np)) { - dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate); - goto free_opp; - } - - /* - * Rate is defined as an unsigned long in clk API, and so casting - * explicitly to its type. Must be fixed once rate is 64 bit - * guaranteed in clk API. - */ - new_opp->rate = (unsigned long)rate; - new_opp->turbo = of_property_read_bool(np, "turbo-mode"); - - new_opp->np = np; - new_opp->dynamic = false; - new_opp->available = true; - - if (!of_property_read_u32(np, "clock-latency-ns", &val)) - new_opp->clock_latency_ns = val; - - ret = opp_parse_supplies(new_opp, dev, opp_table); - if (ret) - goto free_opp; - - ret = _opp_add(dev, new_opp, opp_table); - if (ret) { - /* Don't return error for duplicate OPPs */ - if (ret == -EBUSY) - ret = 0; - goto free_opp; - } - - /* OPP to select on device suspend */ - if (of_property_read_bool(np, "opp-suspend")) { - if (opp_table->suspend_opp) { - dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n", - __func__, opp_table->suspend_opp->rate, - new_opp->rate); - } else { - new_opp->suspend = true; - opp_table->suspend_opp = new_opp; - } - } - - if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max) - opp_table->clock_latency_ns_max = new_opp->clock_latency_ns; - - pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n", - __func__, new_opp->turbo, new_opp->rate, - new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min, - new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns); - - /* - * Notify the changes in the availability of the operable - * frequency/voltage list. - */ - blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); - return 0; - -free_opp: - _opp_free(new_opp); - - return ret; -} - -/* Initializes OPP tables based on new bindings */ -static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np) -{ - struct device_node *np; - struct opp_table *opp_table; - int ret = 0, count = 0; - - opp_table = _managed_opp(opp_np); - if (opp_table) { - /* OPPs are already managed */ - if (!_add_opp_dev(dev, opp_table)) - ret = -ENOMEM; - goto put_opp_table; - } - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return -ENOMEM; - - /* We have opp-table node now, iterate over it and add OPPs */ - for_each_available_child_of_node(opp_np, np) { - count++; - - ret = _opp_add_static_v2(opp_table, dev, np); - if (ret) { - dev_err(dev, "%s: Failed to add OPP, %d\n", __func__, - ret); - _dev_pm_opp_remove_table(opp_table, dev, false); - goto put_opp_table; - } - } - - /* There should be one of more OPP defined */ - if (WARN_ON(!count)) { - ret = -ENOENT; - goto put_opp_table; - } - - opp_table->np = opp_np; - if (of_property_read_bool(opp_np, "opp-shared")) - opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED; - else - opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE; - -put_opp_table: - dev_pm_opp_put_opp_table(opp_table); - - return ret; -} - -/* Initializes OPP tables based on old-deprecated bindings */ -static int _of_add_opp_table_v1(struct device *dev) -{ - struct opp_table *opp_table; - const struct property *prop; - const __be32 *val; - int nr, ret = 0; - - prop = of_find_property(dev->of_node, "operating-points", NULL); - if (!prop) - return -ENODEV; - if (!prop->value) - return -ENODATA; - - /* - * Each OPP is a set of tuples consisting of frequency and - * voltage like <freq-kHz vol-uV>. - */ - nr = prop->length / sizeof(u32); - if (nr % 2) { - dev_err(dev, "%s: Invalid OPP table\n", __func__); - return -EINVAL; - } - - opp_table = dev_pm_opp_get_opp_table(dev); - if (!opp_table) - return -ENOMEM; - - val = prop->value; - while (nr) { - unsigned long freq = be32_to_cpup(val++) * 1000; - unsigned long volt = be32_to_cpup(val++); - - ret = _opp_add_v1(opp_table, dev, freq, volt, false); - if (ret) { - dev_err(dev, "%s: Failed to add OPP %ld (%d)\n", - __func__, freq, ret); - _dev_pm_opp_remove_table(opp_table, dev, false); - break; - } - nr -= 2; - } - - dev_pm_opp_put_opp_table(opp_table); - return ret; -} - -/** - * dev_pm_opp_of_add_table() - Initialize opp table from device tree - * @dev: device pointer used to lookup OPP table. - * - * Register the initial OPP table with the OPP library for given device. - * - * Return: - * 0 On success OR - * Duplicate OPPs (both freq and volt are same) and opp->available - * -EEXIST Freq are same and volt are different OR - * Duplicate OPPs (both freq and volt are same) and !opp->available - * -ENOMEM Memory allocation failure - * -ENODEV when 'operating-points' property is not found or is invalid data - * in device node. - * -ENODATA when empty 'operating-points' property is found - * -EINVAL when invalid entries are found in opp-v2 table - */ -int dev_pm_opp_of_add_table(struct device *dev) -{ - struct device_node *opp_np; - int ret; - - /* - * OPPs have two version of bindings now. The older one is deprecated, - * try for the new binding first. - */ - opp_np = dev_pm_opp_of_get_opp_desc_node(dev); - if (!opp_np) { - /* - * Try old-deprecated bindings for backward compatibility with - * older dtbs. - */ - return _of_add_opp_table_v1(dev); - } - - ret = _of_add_opp_table_v2(dev, opp_np); - of_node_put(opp_np); - - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table); - -/* CPU device specific helpers */ - -/** - * dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask - * @cpumask: cpumask for which OPP table needs to be removed - * - * This removes the OPP tables for CPUs present in the @cpumask. - * This should be used only to remove static entries created from DT. - */ -void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask) -{ - _dev_pm_opp_cpumask_remove_table(cpumask, true); -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table); - -/** - * dev_pm_opp_of_cpumask_add_table() - Adds OPP table for @cpumask - * @cpumask: cpumask for which OPP table needs to be added. - * - * This adds the OPP tables for CPUs present in the @cpumask. - */ -int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask) -{ - struct device *cpu_dev; - int cpu, ret = 0; - - WARN_ON(cpumask_empty(cpumask)); - - for_each_cpu(cpu, cpumask) { - cpu_dev = get_cpu_device(cpu); - if (!cpu_dev) { - pr_err("%s: failed to get cpu%d device\n", __func__, - cpu); - continue; - } - - ret = dev_pm_opp_of_add_table(cpu_dev); - if (ret) { - /* - * OPP may get registered dynamically, don't print error - * message here. - */ - pr_debug("%s: couldn't find opp table for cpu:%d, %d\n", - __func__, cpu, ret); - - /* Free all other OPPs */ - dev_pm_opp_of_cpumask_remove_table(cpumask); - break; - } - } - - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table); - -/* - * Works only for OPP v2 bindings. - * - * Returns -ENOENT if operating-points-v2 bindings aren't supported. - */ -/** - * dev_pm_opp_of_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with - * @cpu_dev using operating-points-v2 - * bindings. - * - * @cpu_dev: CPU device for which we do this operation - * @cpumask: cpumask to update with information of sharing CPUs - * - * This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev. - * - * Returns -ENOENT if operating-points-v2 isn't present for @cpu_dev. - */ -int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, - struct cpumask *cpumask) -{ - struct device_node *np, *tmp_np, *cpu_np; - int cpu, ret = 0; - - /* Get OPP descriptor node */ - np = dev_pm_opp_of_get_opp_desc_node(cpu_dev); - if (!np) { - dev_dbg(cpu_dev, "%s: Couldn't find opp node.\n", __func__); - return -ENOENT; - } - - cpumask_set_cpu(cpu_dev->id, cpumask); - - /* OPPs are shared ? */ - if (!of_property_read_bool(np, "opp-shared")) - goto put_cpu_node; - - for_each_possible_cpu(cpu) { - if (cpu == cpu_dev->id) - continue; - - cpu_np = of_get_cpu_node(cpu, NULL); - if (!cpu_np) { - dev_err(cpu_dev, "%s: failed to get cpu%d node\n", - __func__, cpu); - ret = -ENOENT; - goto put_cpu_node; - } - - /* Get OPP descriptor node */ - tmp_np = _opp_of_get_opp_desc_node(cpu_np); - if (!tmp_np) { - pr_err("%pOF: Couldn't find opp node\n", cpu_np); - ret = -ENOENT; - goto put_cpu_node; - } - - /* CPUs are sharing opp node */ - if (np == tmp_np) - cpumask_set_cpu(cpu, cpumask); - - of_node_put(tmp_np); - } - -put_cpu_node: - of_node_put(np); - return ret; -} -EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus); diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h deleted file mode 100644 index 166eef990599..000000000000 --- a/drivers/base/power/opp/opp.h +++ /dev/null @@ -1,222 +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. - */ - -#ifndef __DRIVER_OPP_H__ -#define __DRIVER_OPP_H__ - -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/kref.h> -#include <linux/list.h> -#include <linux/limits.h> -#include <linux/pm_opp.h> -#include <linux/notifier.h> - -struct clk; -struct regulator; - -/* Lock to allow exclusive modification to the device and opp lists */ -extern struct mutex opp_table_lock; - -extern struct list_head opp_tables; - -/* - * Internal data structure organization with the OPP layer library is as - * follows: - * opp_tables (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 opp_table structure while each opp - * is represented by the opp structure. - */ - -/** - * struct dev_pm_opp - Generic OPP description structure - * @node: opp table 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. - * IMPORTANT: the opp nodes should be maintained in increasing - * order. - * @kref: for reference count of the OPP. - * @available: true/false - marks if this OPP as available or not - * @dynamic: not-created from static DT entries. - * @turbo: true if turbo (boost) OPP - * @suspend: true if suspend OPP - * @rate: Frequency in hertz - * @supplies: Power supplies voltage/current values - * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's - * frequency from any other OPP's frequency. - * @opp_table: points back to the opp_table struct this opp belongs to - * @np: OPP's device node. - * @dentry: debugfs dentry pointer (per opp) - * - * This structure stores the OPP information for a given device. - */ -struct dev_pm_opp { - struct list_head node; - struct kref kref; - - bool available; - bool dynamic; - bool turbo; - bool suspend; - unsigned long rate; - - struct dev_pm_opp_supply *supplies; - - unsigned long clock_latency_ns; - - struct opp_table *opp_table; - - struct device_node *np; - -#ifdef CONFIG_DEBUG_FS - struct dentry *dentry; -#endif -}; - -/** - * struct opp_device - devices managed by 'struct opp_table' - * @node: list node - * @dev: device to which the struct object belongs - * @dentry: debugfs dentry pointer (per device) - * - * This is an internal data structure maintaining the devices that are managed - * by 'struct opp_table'. - */ -struct opp_device { - struct list_head node; - const struct device *dev; - -#ifdef CONFIG_DEBUG_FS - struct dentry *dentry; -#endif -}; - -enum opp_table_access { - OPP_TABLE_ACCESS_UNKNOWN = 0, - OPP_TABLE_ACCESS_EXCLUSIVE = 1, - OPP_TABLE_ACCESS_SHARED = 2, -}; - -/** - * struct opp_table - Device opp structure - * @node: table node - contains the devices with OPPs that - * have been registered. Nodes once added are not modified in this - * table. - * @head: notifier head to notify the OPP availability changes. - * @dev_list: list of devices that share these OPPs - * @opp_list: table of opps - * @kref: for reference count of the table. - * @lock: mutex protecting the opp_list. - * @np: struct device_node pointer for opp's DT node. - * @clock_latency_ns_max: Max clock latency in nanoseconds. - * @shared_opp: OPP is shared between multiple devices. - * @suspend_opp: Pointer to OPP to be used during device suspend. - * @supported_hw: Array of version number to support. - * @supported_hw_count: Number of elements in supported_hw array. - * @prop_name: A name to postfix to many DT properties, while parsing them. - * @clk: Device's clock handle - * @regulators: Supply regulators - * @regulator_count: Number of power supply regulators - * @set_opp: Platform specific set_opp callback - * @set_opp_data: Data to be passed to set_opp callback - * @dentry: debugfs dentry pointer of the real device directory (not links). - * @dentry_name: Name of the real dentry. - * - * @voltage_tolerance_v1: In percentage, for v1 bindings only. - * - * 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 opp_table { - struct list_head node; - - struct blocking_notifier_head head; - struct list_head dev_list; - struct list_head opp_list; - struct kref kref; - struct mutex lock; - - struct device_node *np; - unsigned long clock_latency_ns_max; - - /* For backward compatibility with v1 bindings */ - unsigned int voltage_tolerance_v1; - - enum opp_table_access shared_opp; - struct dev_pm_opp *suspend_opp; - - unsigned int *supported_hw; - unsigned int supported_hw_count; - const char *prop_name; - struct clk *clk; - struct regulator **regulators; - unsigned int regulator_count; - - int (*set_opp)(struct dev_pm_set_opp_data *data); - struct dev_pm_set_opp_data *set_opp_data; - -#ifdef CONFIG_DEBUG_FS - struct dentry *dentry; - char dentry_name[NAME_MAX]; -#endif -}; - -/* Routines internal to opp core */ -void _get_opp_table_kref(struct opp_table *opp_table); -struct opp_table *_find_opp_table(struct device *dev); -struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table); -void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, bool remove_all); -void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all); -struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table); -void _opp_free(struct dev_pm_opp *opp); -int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table); -int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic); -void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of); -struct opp_table *_add_opp_table(struct device *dev); - -#ifdef CONFIG_OF -void _of_init_opp_table(struct opp_table *opp_table, struct device *dev); -#else -static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev) {} -#endif - -#ifdef CONFIG_DEBUG_FS -void opp_debug_remove_one(struct dev_pm_opp *opp); -int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table); -int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table); -void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table); -#else -static inline void opp_debug_remove_one(struct dev_pm_opp *opp) {} - -static inline int opp_debug_create_one(struct dev_pm_opp *opp, - struct opp_table *opp_table) -{ return 0; } -static inline int opp_debug_register(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ return 0; } - -static inline void opp_debug_unregister(struct opp_device *opp_dev, - struct opp_table *opp_table) -{ } -#endif /* DEBUG_FS */ - -#endif /* __DRIVER_OPP_H__ */ |