forked from luck/tmp_suning_uos_patched
Merge branch 'pm-devfreq'
* pm-devfreq: PM / devfreq: Modify the device name as devfreq(X) for sysfs PM / devfreq: Simplify the sysfs name of devfreq-event device PM / devfreq: Remove unnecessary separate _remove_devfreq() PM / devfreq: Fix wrong trans_stat of passive devfreq device PM / devfreq: Fix available_governor sysfs PM / devfreq: exynos-ppmu: Show the registred device for ppmu device PM / devfreq: Fix the wrong description for userspace governor PM / devfreq: Fix the checkpatch warnings PM / devfreq: exynos-bus: Print the real clock rate of bus PM / devfreq: exynos-ppmu: Use the regmap interface to handle the registers PM / devfreq: exynos-bus: Add the detailed correlation for Exynos5433 PM / devfreq: Don't delete sysfs group twice
This commit is contained in:
Rafael J. Wysocki
commit
41ef3d1df0
25
Documentation/ABI/testing/sysfs-class-devfreq-event
Normal file
25
Documentation/ABI/testing/sysfs-class-devfreq-event
Normal file
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@ -0,0 +1,25 @@
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What: /sys/class/devfreq-event/event(x)/
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Date: January 2017
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Contact: Chanwoo Choi <cw00.choi@samsung.com>
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Description:
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Provide a place in sysfs for the devfreq-event objects.
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This allows accessing various devfreq-event specific variables.
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The name of devfreq-event object denoted as 'event(x)' which
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includes the unique number of 'x' for each devfreq-event object.
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What: /sys/class/devfreq-event/event(x)/name
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Date: January 2017
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Contact: Chanwoo Choi <cw00.choi@samsung.com>
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Description:
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The /sys/class/devfreq-event/event(x)/name attribute contains
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the name of the devfreq-event object. This attribute is
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read-only.
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What: /sys/class/devfreq-event/event(x)/enable_count
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Date: January 2017
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Contact: Chanwoo Choi <cw00.choi@samsung.com>
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Description:
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The /sys/class/devfreq-event/event(x)/enable_count attribute
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contains the reference count to enable the devfreq-event
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object. If the device is enabled, the value of attribute is
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greater than zero.
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@ -123,6 +123,20 @@ Detailed correlation between sub-blocks and power line according to Exynos SoC:
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|--- FSYS
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|--- FSYS2
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- In case of Exynos5433, there is VDD_INT power line as following:
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VDD_INT |--- G2D (parent device)
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|--- MSCL
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|--- GSCL
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|--- JPEG
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|--- MFC
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|--- HEVC
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|--- BUS0
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|--- BUS1
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|--- BUS2
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|--- PERIS (Fixed clock rate)
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|--- PERIC (Fixed clock rate)
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|--- FSYS (Fixed clock rate)
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Example1:
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Show the AXI buses of Exynos3250 SoC. Exynos3250 divides the buses to
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power line (regulator). The MIF (Memory Interface) AXI bus is used to
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@ -306,7 +306,7 @@ struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
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struct devfreq_event_desc *desc)
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{
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struct devfreq_event_dev *edev;
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static atomic_t event_no = ATOMIC_INIT(0);
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static atomic_t event_no = ATOMIC_INIT(-1);
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int ret;
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if (!dev || !desc)
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@ -329,7 +329,7 @@ struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
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edev->dev.class = devfreq_event_class;
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edev->dev.release = devfreq_event_release_edev;
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dev_set_name(&edev->dev, "event.%d", atomic_inc_return(&event_no) - 1);
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dev_set_name(&edev->dev, "event%d", atomic_inc_return(&event_no));
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ret = device_register(&edev->dev);
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if (ret < 0) {
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put_device(&edev->dev);
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@ -128,7 +128,7 @@ static void devfreq_set_freq_table(struct devfreq *devfreq)
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* @devfreq: the devfreq instance
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* @freq: the update target frequency
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*/
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static int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
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int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
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{
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int lev, prev_lev, ret = 0;
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unsigned long cur_time;
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@ -164,6 +164,7 @@ static int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
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devfreq->last_stat_updated = cur_time;
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return ret;
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}
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EXPORT_SYMBOL(devfreq_update_status);
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/**
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* find_devfreq_governor() - find devfreq governor from name
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@ -472,11 +473,15 @@ static int devfreq_notifier_call(struct notifier_block *nb, unsigned long type,
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}
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/**
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* _remove_devfreq() - Remove devfreq from the list and release its resources.
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* @devfreq: the devfreq struct
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* devfreq_dev_release() - Callback for struct device to release the device.
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* @dev: the devfreq device
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*
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* Remove devfreq from the list and release its resources.
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*/
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static void _remove_devfreq(struct devfreq *devfreq)
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static void devfreq_dev_release(struct device *dev)
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{
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struct devfreq *devfreq = to_devfreq(dev);
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mutex_lock(&devfreq_list_lock);
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if (IS_ERR(find_device_devfreq(devfreq->dev.parent))) {
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mutex_unlock(&devfreq_list_lock);
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@ -497,19 +502,6 @@ static void _remove_devfreq(struct devfreq *devfreq)
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kfree(devfreq);
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}
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/**
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* devfreq_dev_release() - Callback for struct device to release the device.
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* @dev: the devfreq device
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*
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* This calls _remove_devfreq() if _remove_devfreq() is not called.
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*/
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static void devfreq_dev_release(struct device *dev)
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{
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struct devfreq *devfreq = to_devfreq(dev);
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_remove_devfreq(devfreq);
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}
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/**
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* devfreq_add_device() - Add devfreq feature to the device
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* @dev: the device to add devfreq feature.
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@ -525,6 +517,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
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{
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struct devfreq *devfreq;
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struct devfreq_governor *governor;
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static atomic_t devfreq_no = ATOMIC_INIT(-1);
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int err = 0;
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if (!dev || !profile || !governor_name) {
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@ -536,15 +529,14 @@ struct devfreq *devfreq_add_device(struct device *dev,
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devfreq = find_device_devfreq(dev);
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mutex_unlock(&devfreq_list_lock);
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if (!IS_ERR(devfreq)) {
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dev_err(dev, "%s: Unable to create devfreq for the device. It already has one.\n", __func__);
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dev_err(dev, "%s: Unable to create devfreq for the device.\n",
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__func__);
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err = -EINVAL;
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goto err_out;
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}
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devfreq = kzalloc(sizeof(struct devfreq), GFP_KERNEL);
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if (!devfreq) {
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dev_err(dev, "%s: Unable to create devfreq for the device\n",
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__func__);
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err = -ENOMEM;
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goto err_out;
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}
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@ -567,18 +559,21 @@ struct devfreq *devfreq_add_device(struct device *dev,
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mutex_lock(&devfreq->lock);
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}
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dev_set_name(&devfreq->dev, "%s", dev_name(dev));
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dev_set_name(&devfreq->dev, "devfreq%d",
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atomic_inc_return(&devfreq_no));
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err = device_register(&devfreq->dev);
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if (err) {
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mutex_unlock(&devfreq->lock);
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goto err_out;
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}
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devfreq->trans_table = devm_kzalloc(&devfreq->dev, sizeof(unsigned int) *
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devfreq->trans_table = devm_kzalloc(&devfreq->dev,
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sizeof(unsigned int) *
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devfreq->profile->max_state *
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devfreq->profile->max_state,
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GFP_KERNEL);
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devfreq->time_in_state = devm_kzalloc(&devfreq->dev, sizeof(unsigned long) *
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devfreq->time_in_state = devm_kzalloc(&devfreq->dev,
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sizeof(unsigned long) *
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devfreq->profile->max_state,
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GFP_KERNEL);
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devfreq->last_stat_updated = jiffies;
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@ -937,6 +932,9 @@ static ssize_t governor_store(struct device *dev, struct device_attribute *attr,
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if (df->governor == governor) {
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ret = 0;
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goto out;
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} else if (df->governor->immutable || governor->immutable) {
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ret = -EINVAL;
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goto out;
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}
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if (df->governor) {
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@ -966,13 +964,33 @@ static ssize_t available_governors_show(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct devfreq_governor *tmp_governor;
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struct devfreq *df = to_devfreq(d);
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ssize_t count = 0;
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mutex_lock(&devfreq_list_lock);
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list_for_each_entry(tmp_governor, &devfreq_governor_list, node)
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/*
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* The devfreq with immutable governor (e.g., passive) shows
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* only own governor.
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*/
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if (df->governor->immutable) {
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count = scnprintf(&buf[count], DEVFREQ_NAME_LEN,
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"%s ", df->governor_name);
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/*
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* The devfreq device shows the registered governor except for
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* immutable governors such as passive governor .
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*/
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} else {
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struct devfreq_governor *governor;
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list_for_each_entry(governor, &devfreq_governor_list, node) {
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if (governor->immutable)
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continue;
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count += scnprintf(&buf[count], (PAGE_SIZE - count - 2),
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"%s ", tmp_governor->name);
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"%s ", governor->name);
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}
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}
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mutex_unlock(&devfreq_list_lock);
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/* Truncate the trailing space */
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@ -17,13 +17,13 @@
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/suspend.h>
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#include <linux/devfreq-event.h>
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#include "exynos-ppmu.h"
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struct exynos_ppmu_data {
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void __iomem *base;
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struct clk *clk;
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};
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@ -33,6 +33,7 @@ struct exynos_ppmu {
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unsigned int num_events;
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struct device *dev;
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struct regmap *regmap;
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struct exynos_ppmu_data ppmu;
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};
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@ -107,20 +108,28 @@ static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
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static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
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{
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struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
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int ret;
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u32 pmnc;
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/* Disable all counters */
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__raw_writel(PPMU_CCNT_MASK |
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ret = regmap_write(info->regmap, PPMU_CNTENC,
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PPMU_CCNT_MASK |
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PPMU_PMCNT0_MASK |
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PPMU_PMCNT1_MASK |
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PPMU_PMCNT2_MASK |
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PPMU_PMCNT3_MASK,
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info->ppmu.base + PPMU_CNTENC);
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PPMU_PMCNT3_MASK);
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if (ret < 0)
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return ret;
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/* Disable PPMU */
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pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
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ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc);
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if (ret < 0)
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return ret;
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pmnc &= ~PPMU_PMNC_ENABLE_MASK;
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__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
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ret = regmap_write(info->regmap, PPMU_PMNC, pmnc);
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if (ret < 0)
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return ret;
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return 0;
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}
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@ -129,29 +138,42 @@ static int exynos_ppmu_set_event(struct devfreq_event_dev *edev)
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{
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struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
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int id = exynos_ppmu_find_ppmu_id(edev);
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int ret;
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u32 pmnc, cntens;
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if (id < 0)
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return id;
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/* Enable specific counter */
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cntens = __raw_readl(info->ppmu.base + PPMU_CNTENS);
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ret = regmap_read(info->regmap, PPMU_CNTENS, &cntens);
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if (ret < 0)
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return ret;
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cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
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__raw_writel(cntens, info->ppmu.base + PPMU_CNTENS);
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ret = regmap_write(info->regmap, PPMU_CNTENS, cntens);
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if (ret < 0)
|
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return ret;
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/* Set the event of Read/Write data count */
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__raw_writel(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT,
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info->ppmu.base + PPMU_BEVTxSEL(id));
|
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ret = regmap_write(info->regmap, PPMU_BEVTxSEL(id),
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PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT);
|
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if (ret < 0)
|
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return ret;
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|
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/* Reset cycle counter/performance counter and enable PPMU */
|
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pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
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ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc);
|
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if (ret < 0)
|
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return ret;
|
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|
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pmnc &= ~(PPMU_PMNC_ENABLE_MASK
|
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| PPMU_PMNC_COUNTER_RESET_MASK
|
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| PPMU_PMNC_CC_RESET_MASK);
|
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pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
|
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pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
|
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pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
|
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__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
|
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ret = regmap_write(info->regmap, PPMU_PMNC, pmnc);
|
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if (ret < 0)
|
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return ret;
|
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|
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return 0;
|
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}
|
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|
|
@ -161,40 +183,64 @@ static int exynos_ppmu_get_event(struct devfreq_event_dev *edev,
|
|||
{
|
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struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
|
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int id = exynos_ppmu_find_ppmu_id(edev);
|
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u32 pmnc, cntenc;
|
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unsigned int total_count, load_count;
|
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unsigned int pmcnt3_high, pmcnt3_low;
|
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unsigned int pmnc, cntenc;
|
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int ret;
|
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|
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if (id < 0)
|
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return -EINVAL;
|
||||
|
||||
/* Disable PPMU */
|
||||
pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
|
||||
ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
pmnc &= ~PPMU_PMNC_ENABLE_MASK;
|
||||
__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
|
||||
ret = regmap_write(info->regmap, PPMU_PMNC, pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Read cycle count */
|
||||
edata->total_count = __raw_readl(info->ppmu.base + PPMU_CCNT);
|
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ret = regmap_read(info->regmap, PPMU_CCNT, &total_count);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
edata->total_count = total_count;
|
||||
|
||||
/* Read performance count */
|
||||
switch (id) {
|
||||
case PPMU_PMNCNT0:
|
||||
case PPMU_PMNCNT1:
|
||||
case PPMU_PMNCNT2:
|
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edata->load_count
|
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= __raw_readl(info->ppmu.base + PPMU_PMNCT(id));
|
||||
ret = regmap_read(info->regmap, PPMU_PMNCT(id), &load_count);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
edata->load_count = load_count;
|
||||
break;
|
||||
case PPMU_PMNCNT3:
|
||||
edata->load_count =
|
||||
((__raw_readl(info->ppmu.base + PPMU_PMCNT3_HIGH) << 8)
|
||||
| __raw_readl(info->ppmu.base + PPMU_PMCNT3_LOW));
|
||||
ret = regmap_read(info->regmap, PPMU_PMCNT3_HIGH, &pmcnt3_high);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_read(info->regmap, PPMU_PMCNT3_LOW, &pmcnt3_low);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
edata->load_count = ((pmcnt3_high << 8) | pmcnt3_low);
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Disable specific counter */
|
||||
cntenc = __raw_readl(info->ppmu.base + PPMU_CNTENC);
|
||||
ret = regmap_read(info->regmap, PPMU_CNTENC, &cntenc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
|
||||
__raw_writel(cntenc, info->ppmu.base + PPMU_CNTENC);
|
||||
ret = regmap_write(info->regmap, PPMU_CNTENC, cntenc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name,
|
||||
edata->load_count, edata->total_count);
|
||||
|
|
@ -214,36 +260,93 @@ static const struct devfreq_event_ops exynos_ppmu_ops = {
|
|||
static int exynos_ppmu_v2_disable(struct devfreq_event_dev *edev)
|
||||
{
|
||||
struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
|
||||
int ret;
|
||||
u32 pmnc, clear;
|
||||
|
||||
/* Disable all counters */
|
||||
clear = (PPMU_CCNT_MASK | PPMU_PMCNT0_MASK | PPMU_PMCNT1_MASK
|
||||
| PPMU_PMCNT2_MASK | PPMU_PMCNT3_MASK);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_FLAG, clear);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
__raw_writel(clear, info->ppmu.base + PPMU_V2_FLAG);
|
||||
__raw_writel(clear, info->ppmu.base + PPMU_V2_INTENC);
|
||||
__raw_writel(clear, info->ppmu.base + PPMU_V2_CNTENC);
|
||||
__raw_writel(clear, info->ppmu.base + PPMU_V2_CNT_RESET);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_INTENC, clear);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG0);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG1);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_CFG2);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CIG_RESULT);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CNT_AUTO);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV0_TYPE);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV1_TYPE);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV2_TYPE);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_CH_EV3_TYPE);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_ID_V);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_ID_A);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_OTHERS_V);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_SM_OTHERS_A);
|
||||
__raw_writel(0x0, info->ppmu.base + PPMU_V2_INTERRUPT_RESET);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CNTENC, clear);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CNT_RESET, clear);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG0, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG1, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG2, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CIG_RESULT, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CNT_AUTO, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EV0_TYPE, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EV1_TYPE, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EV2_TYPE, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EV3_TYPE, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_SM_ID_V, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_SM_ID_A, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_SM_OTHERS_V, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_SM_OTHERS_A, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_INTERRUPT_RESET, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Disable PPMU */
|
||||
pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
pmnc &= ~PPMU_PMNC_ENABLE_MASK;
|
||||
__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -251,30 +354,43 @@ static int exynos_ppmu_v2_disable(struct devfreq_event_dev *edev)
|
|||
static int exynos_ppmu_v2_set_event(struct devfreq_event_dev *edev)
|
||||
{
|
||||
struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
|
||||
unsigned int pmnc, cntens;
|
||||
int id = exynos_ppmu_find_ppmu_id(edev);
|
||||
u32 pmnc, cntens;
|
||||
int ret;
|
||||
|
||||
/* Enable all counters */
|
||||
cntens = __raw_readl(info->ppmu.base + PPMU_V2_CNTENS);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_CNTENS, &cntens);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
|
||||
__raw_writel(cntens, info->ppmu.base + PPMU_V2_CNTENS);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CNTENS, cntens);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set the event of Read/Write data count */
|
||||
switch (id) {
|
||||
case PPMU_PMNCNT0:
|
||||
case PPMU_PMNCNT1:
|
||||
case PPMU_PMNCNT2:
|
||||
__raw_writel(PPMU_V2_RO_DATA_CNT | PPMU_V2_WO_DATA_CNT,
|
||||
info->ppmu.base + PPMU_V2_CH_EVx_TYPE(id));
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EVx_TYPE(id),
|
||||
PPMU_V2_RO_DATA_CNT | PPMU_V2_WO_DATA_CNT);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
break;
|
||||
case PPMU_PMNCNT3:
|
||||
__raw_writel(PPMU_V2_EVT3_RW_DATA_CNT,
|
||||
info->ppmu.base + PPMU_V2_CH_EVx_TYPE(id));
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CH_EVx_TYPE(id),
|
||||
PPMU_V2_EVT3_RW_DATA_CNT);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Reset cycle counter/performance counter and enable PPMU */
|
||||
pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
pmnc &= ~(PPMU_PMNC_ENABLE_MASK
|
||||
| PPMU_PMNC_COUNTER_RESET_MASK
|
||||
| PPMU_PMNC_CC_RESET_MASK
|
||||
|
|
@ -284,7 +400,10 @@ static int exynos_ppmu_v2_set_event(struct devfreq_event_dev *edev)
|
|||
pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
|
||||
pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
|
||||
pmnc |= (PPMU_V2_MODE_MANUAL << PPMU_V2_PMNC_START_MODE_SHIFT);
|
||||
__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
|
||||
|
||||
ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -294,37 +413,61 @@ static int exynos_ppmu_v2_get_event(struct devfreq_event_dev *edev,
|
|||
{
|
||||
struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
|
||||
int id = exynos_ppmu_find_ppmu_id(edev);
|
||||
u32 pmnc, cntenc;
|
||||
u32 pmcnt_high, pmcnt_low;
|
||||
u64 load_count = 0;
|
||||
int ret;
|
||||
unsigned int pmnc, cntenc;
|
||||
unsigned int pmcnt_high, pmcnt_low;
|
||||
unsigned int total_count, count;
|
||||
unsigned long load_count = 0;
|
||||
|
||||
/* Disable PPMU */
|
||||
pmnc = __raw_readl(info->ppmu.base + PPMU_V2_PMNC);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
pmnc &= ~PPMU_PMNC_ENABLE_MASK;
|
||||
__raw_writel(pmnc, info->ppmu.base + PPMU_V2_PMNC);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Read cycle count and performance count */
|
||||
edata->total_count = __raw_readl(info->ppmu.base + PPMU_V2_CCNT);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_CCNT, &total_count);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
edata->total_count = total_count;
|
||||
|
||||
switch (id) {
|
||||
case PPMU_PMNCNT0:
|
||||
case PPMU_PMNCNT1:
|
||||
case PPMU_PMNCNT2:
|
||||
load_count = __raw_readl(info->ppmu.base + PPMU_V2_PMNCT(id));
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMNCT(id), &count);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
load_count = count;
|
||||
break;
|
||||
case PPMU_PMNCNT3:
|
||||
pmcnt_high = __raw_readl(info->ppmu.base + PPMU_V2_PMCNT3_HIGH);
|
||||
pmcnt_low = __raw_readl(info->ppmu.base + PPMU_V2_PMCNT3_LOW);
|
||||
load_count = ((u64)((pmcnt_high & 0xff)) << 32)
|
||||
+ (u64)pmcnt_low;
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMCNT3_HIGH,
|
||||
&pmcnt_high);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = regmap_read(info->regmap, PPMU_V2_PMCNT3_LOW, &pmcnt_low);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
load_count = ((u64)((pmcnt_high & 0xff)) << 32)+ (u64)pmcnt_low;
|
||||
break;
|
||||
}
|
||||
edata->load_count = load_count;
|
||||
|
||||
/* Disable all counters */
|
||||
cntenc = __raw_readl(info->ppmu.base + PPMU_V2_CNTENC);
|
||||
ret = regmap_read(info->regmap, PPMU_V2_CNTENC, &cntenc);
|
||||
if (ret < 0)
|
||||
return 0;
|
||||
|
||||
cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
|
||||
__raw_writel(cntenc, info->ppmu.base + PPMU_V2_CNTENC);
|
||||
ret = regmap_write(info->regmap, PPMU_V2_CNTENC, cntenc);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
dev_dbg(&edev->dev, "%25s (load: %ld / %ld)\n", edev->desc->name,
|
||||
edata->load_count, edata->total_count);
|
||||
|
|
@ -411,10 +554,19 @@ static int of_get_devfreq_events(struct device_node *np,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
|
||||
static struct regmap_config exynos_ppmu_regmap_config = {
|
||||
.reg_bits = 32,
|
||||
.val_bits = 32,
|
||||
.reg_stride = 4,
|
||||
};
|
||||
|
||||
static int exynos_ppmu_parse_dt(struct platform_device *pdev,
|
||||
struct exynos_ppmu *info)
|
||||
{
|
||||
struct device *dev = info->dev;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct resource *res;
|
||||
void __iomem *base;
|
||||
int ret = 0;
|
||||
|
||||
if (!np) {
|
||||
|
|
@ -423,10 +575,17 @@ static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
|
|||
}
|
||||
|
||||
/* Maps the memory mapped IO to control PPMU register */
|
||||
info->ppmu.base = of_iomap(np, 0);
|
||||
if (IS_ERR_OR_NULL(info->ppmu.base)) {
|
||||
dev_err(dev, "failed to map memory region\n");
|
||||
return -ENOMEM;
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
base = devm_ioremap_resource(dev, res);
|
||||
if (IS_ERR(base))
|
||||
return PTR_ERR(base);
|
||||
|
||||
exynos_ppmu_regmap_config.max_register = resource_size(res) - 4;
|
||||
info->regmap = devm_regmap_init_mmio(dev, base,
|
||||
&exynos_ppmu_regmap_config);
|
||||
if (IS_ERR(info->regmap)) {
|
||||
dev_err(dev, "failed to initialize regmap\n");
|
||||
return PTR_ERR(info->regmap);
|
||||
}
|
||||
|
||||
info->ppmu.clk = devm_clk_get(dev, "ppmu");
|
||||
|
|
@ -438,15 +597,10 @@ static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
|
|||
ret = of_get_devfreq_events(np, info);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to parse exynos ppmu dt node\n");
|
||||
goto err;
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
iounmap(info->ppmu.base);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int exynos_ppmu_probe(struct platform_device *pdev)
|
||||
|
|
@ -463,7 +617,7 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
|
|||
info->dev = &pdev->dev;
|
||||
|
||||
/* Parse dt data to get resource */
|
||||
ret = exynos_ppmu_parse_dt(info);
|
||||
ret = exynos_ppmu_parse_dt(pdev, info);
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev,
|
||||
"failed to parse devicetree for resource\n");
|
||||
|
|
@ -476,8 +630,7 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
|
|||
if (!info->edev) {
|
||||
dev_err(&pdev->dev,
|
||||
"failed to allocate memory devfreq-event devices\n");
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
return -ENOMEM;
|
||||
}
|
||||
edev = info->edev;
|
||||
platform_set_drvdata(pdev, info);
|
||||
|
|
@ -488,17 +641,16 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
|
|||
ret = PTR_ERR(edev[i]);
|
||||
dev_err(&pdev->dev,
|
||||
"failed to add devfreq-event device\n");
|
||||
goto err;
|
||||
return PTR_ERR(edev[i]);
|
||||
}
|
||||
|
||||
pr_info("exynos-ppmu: new PPMU device registered %s (%s)\n",
|
||||
dev_name(&pdev->dev), desc[i].name);
|
||||
}
|
||||
|
||||
clk_prepare_enable(info->ppmu.clk);
|
||||
|
||||
return 0;
|
||||
err:
|
||||
iounmap(info->ppmu.base);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int exynos_ppmu_remove(struct platform_device *pdev)
|
||||
|
|
@ -506,7 +658,6 @@ static int exynos_ppmu_remove(struct platform_device *pdev)
|
|||
struct exynos_ppmu *info = platform_get_drvdata(pdev);
|
||||
|
||||
clk_disable_unprepare(info->ppmu.clk);
|
||||
iounmap(info->ppmu.base);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -146,8 +146,8 @@ static int exynos_bus_target(struct device *dev, unsigned long *freq, u32 flags)
|
|||
}
|
||||
bus->curr_freq = new_freq;
|
||||
|
||||
dev_dbg(dev, "Set the frequency of bus (%lukHz -> %lukHz)\n",
|
||||
old_freq/1000, new_freq/1000);
|
||||
dev_dbg(dev, "Set the frequency of bus (%luHz -> %luHz, %luHz)\n",
|
||||
old_freq, new_freq, clk_get_rate(bus->clk));
|
||||
out:
|
||||
mutex_unlock(&bus->lock);
|
||||
|
||||
|
|
@ -239,8 +239,8 @@ static int exynos_bus_passive_target(struct device *dev, unsigned long *freq,
|
|||
*freq = new_freq;
|
||||
bus->curr_freq = new_freq;
|
||||
|
||||
dev_dbg(dev, "Set the frequency of bus (%lukHz -> %lukHz)\n",
|
||||
old_freq/1000, new_freq/1000);
|
||||
dev_dbg(dev, "Set the frequency of bus (%luHz -> %luHz, %luHz)\n",
|
||||
old_freq, new_freq, clk_get_rate(bus->clk));
|
||||
out:
|
||||
mutex_unlock(&bus->lock);
|
||||
|
||||
|
|
|
|||
|
|
@ -38,4 +38,6 @@ extern void devfreq_interval_update(struct devfreq *devfreq,
|
|||
extern int devfreq_add_governor(struct devfreq_governor *governor);
|
||||
extern int devfreq_remove_governor(struct devfreq_governor *governor);
|
||||
|
||||
extern int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
|
||||
|
||||
#endif /* _GOVERNOR_H */
|
||||
|
|
|
|||
|
|
@ -112,6 +112,11 @@ static int update_devfreq_passive(struct devfreq *devfreq, unsigned long freq)
|
|||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (devfreq->profile->freq_table
|
||||
&& (devfreq_update_status(devfreq, freq)))
|
||||
dev_err(&devfreq->dev,
|
||||
"Couldn't update frequency transition information.\n");
|
||||
|
||||
devfreq->previous_freq = freq;
|
||||
|
||||
out:
|
||||
|
|
@ -179,6 +184,7 @@ static int devfreq_passive_event_handler(struct devfreq *devfreq,
|
|||
|
||||
static struct devfreq_governor devfreq_passive = {
|
||||
.name = "passive",
|
||||
.immutable = 1,
|
||||
.get_target_freq = devfreq_passive_get_target_freq,
|
||||
.event_handler = devfreq_passive_event_handler,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* linux/drivers/devfreq/governor_simpleondemand.c
|
||||
* linux/drivers/devfreq/governor_userspace.c
|
||||
*
|
||||
* Copyright (C) 2011 Samsung Electronics
|
||||
* MyungJoo Ham <myungjoo.ham@samsung.com>
|
||||
|
|
@ -50,7 +50,6 @@ static ssize_t store_freq(struct device *dev, struct device_attribute *attr,
|
|||
unsigned long wanted;
|
||||
int err = 0;
|
||||
|
||||
|
||||
mutex_lock(&devfreq->lock);
|
||||
data = devfreq->data;
|
||||
|
||||
|
|
@ -112,7 +111,13 @@ static int userspace_init(struct devfreq *devfreq)
|
|||
|
||||
static void userspace_exit(struct devfreq *devfreq)
|
||||
{
|
||||
/*
|
||||
* Remove the sysfs entry, unless this is being called after
|
||||
* device_del(), which should have done this already via kobject_del().
|
||||
*/
|
||||
if (devfreq->dev.kobj.sd)
|
||||
sysfs_remove_group(&devfreq->dev.kobj, &dev_attr_group);
|
||||
|
||||
kfree(devfreq->data);
|
||||
devfreq->data = NULL;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -104,6 +104,8 @@ struct devfreq_dev_profile {
|
|||
* struct devfreq_governor - Devfreq policy governor
|
||||
* @node: list node - contains registered devfreq governors
|
||||
* @name: Governor's name
|
||||
* @immutable: Immutable flag for governor. If the value is 1,
|
||||
* this govenror is never changeable to other governor.
|
||||
* @get_target_freq: Returns desired operating frequency for the device.
|
||||
* Basically, get_target_freq will run
|
||||
* devfreq_dev_profile.get_dev_status() to get the
|
||||
|
|
@ -121,6 +123,7 @@ struct devfreq_governor {
|
|||
struct list_head node;
|
||||
|
||||
const char name[DEVFREQ_NAME_LEN];
|
||||
const unsigned int immutable;
|
||||
int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
|
||||
int (*event_handler)(struct devfreq *devfreq,
|
||||
unsigned int event, void *data);
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user