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|
/*
* drivers/video/tegra/host/nvhost_acm.c
*
* Tegra Graphics Host Automatic Clock Management
*
* Copyright (c) 2010-2014, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/clk/tegra.h>
#include <linux/tegra-powergate.h>
#include <linux/tegra-soc.h>
#include <trace/events/nvhost.h>
#include <linux/platform_data/tegra_edp.h>
#include <linux/tegra_pm_domains.h>
#include <mach/mc.h>
#include "nvhost_acm.h"
#include "nvhost_channel.h"
#include "dev.h"
#include "bus_client.h"
#define ACM_SUSPEND_WAIT_FOR_IDLE_TIMEOUT (2 * HZ)
#define POWERGATE_DELAY 10
#define MAX_DEVID_LENGTH 16
#ifdef CONFIG_PM_GENERIC_DOMAINS
static int nvhost_module_power_on(struct generic_pm_domain *domain);
static int nvhost_module_power_off(struct generic_pm_domain *domain);
#endif
DEFINE_MUTEX(client_list_lock);
struct nvhost_module_client {
struct list_head node;
unsigned long rate[NVHOST_MODULE_MAX_CLOCKS];
void *priv;
};
static void do_powergate_locked(int id)
{
nvhost_dbg_fn("%d", id);
if (id != -1 && tegra_powergate_is_powered(id))
tegra_powergate_partition(id);
}
static void do_unpowergate_locked(int id)
{
int ret = 0;
if (id != -1) {
ret = tegra_unpowergate_partition(id);
if (ret)
pr_err("%s: unpowergate failed: id = %d\n",
__func__, id);
}
}
static void do_module_reset_locked(struct platform_device *dev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
if (pdata->reset) {
pdata->reset(dev);
return;
}
/* assert module and mc client reset */
if (pdata->clocks[0].reset) {
tegra_mc_flush(pdata->clocks[0].reset);
tegra_periph_reset_assert(pdata->clk[0]);
}
if (pdata->clocks[1].reset) {
tegra_mc_flush(pdata->clocks[1].reset);
tegra_periph_reset_assert(pdata->clk[1]);
}
udelay(POWERGATE_DELAY);
/* deassert reset */
if (pdata->clocks[0].reset) {
tegra_periph_reset_deassert(pdata->clk[0]);
tegra_mc_flush_done(pdata->clocks[0].reset);
}
if (pdata->clocks[1].reset) {
tegra_periph_reset_deassert(pdata->clk[1]);
tegra_mc_flush_done(pdata->clocks[1].reset);
}
}
void nvhost_module_reset(struct platform_device *dev, bool reboot)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
dev_dbg(&dev->dev,
"%s: asserting %s module reset (id %d, id2 %d)\n",
__func__, dev_name(&dev->dev),
pdata->powergate_ids[0], pdata->powergate_ids[1]);
mutex_lock(&pdata->lock);
do_module_reset_locked(dev);
mutex_unlock(&pdata->lock);
if (reboot && pdata->finalize_poweron)
pdata->finalize_poweron(dev);
dev_dbg(&dev->dev, "%s: module %s out of reset\n",
__func__, dev_name(&dev->dev));
}
void nvhost_module_busy_noresume(struct platform_device *dev)
{
if (dev->dev.parent && (dev->dev.parent != &platform_bus))
nvhost_module_busy_noresume(nvhost_get_parent(dev));
#ifdef CONFIG_PM_RUNTIME
pm_runtime_get_noresume(&dev->dev);
#endif
}
int nvhost_module_busy(struct platform_device *dev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
int ret = 0;
/* Explicitly turn on the host1x clocks
* - This is needed as host1x driver sets ignore_children = true
* to cater the use case of display clock ON but host1x clock OFF
* in OS-Idle-Display-ON case
* - This was easily done in ACM as it only checked the ref count
* of host1x (or any device for that matter) to be zero before
* turning off its clock
* - However, runtime PM checks to see if *ANY* child of device is
* in ACTIVE state and if yes, it doesn't suspend the parent. As a
* result of this, display && host1x clocks remains ON during
* OS-Idle-Display-ON case
* - The code below fixes this use-case
*/
if (dev->dev.parent && (dev->dev.parent != &platform_bus))
ret = nvhost_module_busy(nvhost_get_parent(dev));
if (ret)
return ret;
#ifdef CONFIG_PM_RUNTIME
ret = pm_runtime_get_sync(&dev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&dev->dev);
if (dev->dev.parent && (dev->dev.parent != &platform_bus))
nvhost_module_idle(nvhost_get_parent(dev));
nvhost_err(&dev->dev, "failed to power on, err %d", ret);
return ret;
}
#endif
if (pdata->busy)
pdata->busy(dev);
return 0;
}
void nvhost_module_disable_poweroff(struct platform_device *dev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
if (!dev_pm_qos_request_active(&pdata->no_poweroff_req))
dev_pm_qos_add_request(&dev->dev, &pdata->no_poweroff_req,
DEV_PM_QOS_FLAGS, PM_QOS_FLAG_NO_POWER_OFF);
}
void nvhost_module_enable_poweroff(struct platform_device *dev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
if (dev_pm_qos_request_active(&pdata->no_poweroff_req))
dev_pm_qos_remove_request(&pdata->no_poweroff_req);
}
void nvhost_module_idle_mult(struct platform_device *dev, int refs)
{
int original_refs = refs;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
#ifdef CONFIG_PM_RUNTIME
/* call idle callback only if the device is turned on. */
if (atomic_read(&dev->dev.power.usage_count) == refs &&
pm_runtime_active(&dev->dev)) {
if (pdata->idle)
pdata->idle(dev);
}
while (refs--) {
pm_runtime_mark_last_busy(&dev->dev);
if (pdata->clockgate_delay)
pm_runtime_put_sync_autosuspend(&dev->dev);
else
pm_runtime_put(&dev->dev);
}
#else
if (pdata->idle)
pdata->idle(dev);
#endif
/* Explicitly turn off the host1x clocks */
if (dev->dev.parent && (dev->dev.parent != &platform_bus))
nvhost_module_idle_mult(nvhost_get_parent(dev), original_refs);
}
int nvhost_module_get_rate(struct platform_device *dev, unsigned long *rate,
int index)
{
struct clk *c;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
int err = 0;
c = pdata->clk[index];
if (!c)
return -EINVAL;
/* Need to enable client to get correct rate */
err = nvhost_module_busy(dev);
if (err)
return err;
*rate = clk_get_rate(c);
nvhost_module_idle(dev);
return 0;
}
static int nvhost_module_update_rate(struct platform_device *dev, int index)
{
unsigned long rate = 0;
struct nvhost_module_client *m;
unsigned long devfreq_rate, default_rate;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
int ret;
if (!pdata->clk[index])
return -EINVAL;
/* If devfreq is on, use that clock rate, otherwise default */
devfreq_rate = pdata->clocks[index].devfreq_rate;
default_rate = devfreq_rate ?
devfreq_rate : pdata->clocks[index].default_rate;
default_rate = clk_round_rate(pdata->clk[index], default_rate);
list_for_each_entry(m, &pdata->client_list, node) {
unsigned long r = m->rate[index];
if (!r)
r = default_rate;
rate = max(r, rate);
}
if (!rate)
rate = default_rate;
trace_nvhost_module_update_rate(dev->name,
pdata->clocks[index].name, rate);
ret = clk_set_rate(pdata->clk[index], rate);
return ret;
}
int nvhost_module_set_rate(struct platform_device *dev, void *priv,
unsigned long rate, int index, int bBW)
{
struct nvhost_module_client *m;
int ret = 0;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
nvhost_dbg_fn("%s", dev->name);
mutex_lock(&client_list_lock);
list_for_each_entry(m, &pdata->client_list, node) {
if (m->priv == priv) {
if (bBW) {
/*
* If client sets BW, then we need to
* convert it to freq.
* rate is Bps and input param of
* tegra_emc_bw_to_freq_req is KBps.
*/
unsigned int freq_khz =
tegra_emc_bw_to_freq_req
((unsigned long)(rate >> 10));
m->rate[index] =
clk_round_rate(pdata->clk[index],
(unsigned long)(freq_khz << 10));
} else
m->rate[index] =
clk_round_rate(pdata->clk[index], rate);
}
}
ret = nvhost_module_update_rate(dev, index);
mutex_unlock(&client_list_lock);
return ret;
}
int nvhost_module_add_client(struct platform_device *dev, void *priv)
{
struct nvhost_module_client *client;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
nvhost_dbg_fn("%s num_clks=%d priv=%p", dev->name,
pdata->num_clks, priv);
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client)
return -ENOMEM;
INIT_LIST_HEAD(&client->node);
client->priv = priv;
mutex_lock(&client_list_lock);
list_add_tail(&client->node, &pdata->client_list);
mutex_unlock(&client_list_lock);
return 0;
}
void nvhost_module_remove_client(struct platform_device *dev, void *priv)
{
int i;
struct nvhost_module_client *m;
int found = 0;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
nvhost_dbg_fn("%s priv=%p", dev->name, priv);
mutex_lock(&client_list_lock);
list_for_each_entry(m, &pdata->client_list, node) {
if (priv == m->priv) {
list_del(&m->node);
found = 1;
break;
}
}
if (found) {
kfree(m);
for (i = 0; i < pdata->num_clks; i++)
nvhost_module_update_rate(dev, i);
}
mutex_unlock(&client_list_lock);
}
static ssize_t powergate_delay_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int powergate_delay = 0, ret = 0;
struct nvhost_device_power_attr *power_attribute =
container_of(attr, struct nvhost_device_power_attr, \
power_attr[NVHOST_POWER_SYSFS_ATTRIB_POWERGATE_DELAY]);
struct platform_device *dev = power_attribute->ndev;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
if (!pdata->can_powergate) {
dev_info(&dev->dev, "does not support power-gating\n");
return count;
}
mutex_lock(&pdata->lock);
ret = sscanf(buf, "%d", &powergate_delay);
if (ret == 1 && powergate_delay >= 0) {
struct generic_pm_domain *genpd =
pd_to_genpd(dev->dev.pm_domain);
pdata->powergate_delay = powergate_delay;
pm_genpd_set_poweroff_delay(genpd, pdata->powergate_delay);
}
else
dev_err(&dev->dev, "Invalid powergate delay\n");
mutex_unlock(&pdata->lock);
return count;
}
static ssize_t powergate_delay_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
int ret;
struct nvhost_device_power_attr *power_attribute =
container_of(attr, struct nvhost_device_power_attr, \
power_attr[NVHOST_POWER_SYSFS_ATTRIB_POWERGATE_DELAY]);
struct platform_device *dev = power_attribute->ndev;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
mutex_lock(&pdata->lock);
ret = sprintf(buf, "%d\n", pdata->powergate_delay);
mutex_unlock(&pdata->lock);
return ret;
}
static ssize_t clockgate_delay_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int clockgate_delay = 0, ret = 0;
struct nvhost_device_power_attr *power_attribute =
container_of(attr, struct nvhost_device_power_attr, \
power_attr[NVHOST_POWER_SYSFS_ATTRIB_CLOCKGATE_DELAY]);
struct platform_device *dev = power_attribute->ndev;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
mutex_lock(&pdata->lock);
ret = sscanf(buf, "%d", &clockgate_delay);
if (ret == 1 && clockgate_delay >= 0) {
pdata->clockgate_delay = clockgate_delay;
pm_runtime_set_autosuspend_delay(&dev->dev,
pdata->clockgate_delay);
}
else
dev_err(&dev->dev, "Invalid clockgate delay\n");
mutex_unlock(&pdata->lock);
return count;
}
static ssize_t clockgate_delay_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
int ret;
struct nvhost_device_power_attr *power_attribute =
container_of(attr, struct nvhost_device_power_attr, \
power_attr[NVHOST_POWER_SYSFS_ATTRIB_CLOCKGATE_DELAY]);
struct platform_device *dev = power_attribute->ndev;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
mutex_lock(&pdata->lock);
ret = sprintf(buf, "%d\n", pdata->clockgate_delay);
mutex_unlock(&pdata->lock);
return ret;
}
int nvhost_module_set_devfreq_rate(struct platform_device *dev, int index,
unsigned long rate)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
int ret;
rate = clk_round_rate(pdata->clk[index], rate);
pdata->clocks[index].devfreq_rate = rate;
trace_nvhost_module_set_devfreq_rate(dev->name,
pdata->clocks[index].name, rate);
mutex_lock(&client_list_lock);
ret = nvhost_module_update_rate(dev, index);
mutex_unlock(&client_list_lock);
return ret;
}
int nvhost_module_init(struct platform_device *dev)
{
int i = 0, err = 0;
struct kobj_attribute *attr = NULL;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
/* initialize clocks to known state (=enabled) */
pdata->num_clks = 0;
INIT_LIST_HEAD(&pdata->client_list);
while (i < NVHOST_MODULE_MAX_CLOCKS && pdata->clocks[i].name) {
char devname[MAX_DEVID_LENGTH];
long rate = pdata->clocks[i].default_rate;
struct clk *c;
snprintf(devname, MAX_DEVID_LENGTH,
(dev->id <= 0) ? "tegra_%s" : "tegra_%s.%d",
dev->name, dev->id);
c = clk_get_sys(devname, pdata->clocks[i].name);
if (IS_ERR(c)) {
dev_err(&dev->dev, "clk_get_sys failed for i=%d %s:%s",
i, devname, pdata->clocks[i].name);
/* arguably we should fail init here instead... */
i++;
continue;
}
nvhost_dbg_fn("%s->clk[%d] -> %s:%s:%p",
dev->name, pdata->num_clks,
devname, pdata->clocks[i].name,
c);
rate = clk_round_rate(c, rate);
clk_prepare_enable(c);
clk_set_rate(c, rate);
pdata->clk[pdata->num_clks++] = c;
i++;
}
pdata->num_clks = i;
/* reset the module */
mutex_lock(&pdata->lock);
do_module_reset_locked(dev);
mutex_unlock(&pdata->lock);
/* disable the clocks */
for (i = 0; i < pdata->num_clks; ++i)
clk_disable_unprepare(pdata->clk[i]);
/* power gate units that we can power gate */
if (pdata->can_powergate) {
do_powergate_locked(pdata->powergate_ids[0]);
do_powergate_locked(pdata->powergate_ids[1]);
} else {
do_unpowergate_locked(pdata->powergate_ids[0]);
do_unpowergate_locked(pdata->powergate_ids[1]);
}
/* Init the power sysfs attributes for this device */
pdata->power_attrib = devm_kzalloc(&dev->dev,
sizeof(struct nvhost_device_power_attr), GFP_KERNEL);
if (!pdata->power_attrib) {
dev_err(&dev->dev, "Unable to allocate sysfs attributes\n");
return -ENOMEM;
}
pdata->power_attrib->ndev = dev;
pdata->power_kobj = kobject_create_and_add("acm", &dev->dev.kobj);
if (!pdata->power_kobj) {
dev_err(&dev->dev, "Could not add dir 'power'\n");
err = -EIO;
goto fail_attrib_alloc;
}
attr = &pdata->power_attrib->power_attr[NVHOST_POWER_SYSFS_ATTRIB_CLOCKGATE_DELAY];
attr->attr.name = "clockgate_delay";
attr->attr.mode = S_IWUSR | S_IRUGO;
attr->show = clockgate_delay_show;
attr->store = clockgate_delay_store;
sysfs_attr_init(&attr->attr);
if (sysfs_create_file(pdata->power_kobj, &attr->attr)) {
dev_err(&dev->dev, "Could not create sysfs attribute clockgate_delay\n");
err = -EIO;
goto fail_clockdelay;
}
attr = &pdata->power_attrib->power_attr[NVHOST_POWER_SYSFS_ATTRIB_POWERGATE_DELAY];
attr->attr.name = "powergate_delay";
attr->attr.mode = S_IWUSR | S_IRUGO;
attr->show = powergate_delay_show;
attr->store = powergate_delay_store;
sysfs_attr_init(&attr->attr);
if (sysfs_create_file(pdata->power_kobj, &attr->attr)) {
dev_err(&dev->dev, "Could not create sysfs attribute powergate_delay\n");
err = -EIO;
goto fail_powergatedelay;
}
if (pdata->clockgate_delay) {
pm_runtime_set_autosuspend_delay(&dev->dev,
pdata->clockgate_delay);
pm_runtime_use_autosuspend(&dev->dev);
}
pm_runtime_enable(&dev->dev);
if (!pm_runtime_enabled(&dev->dev))
nvhost_module_enable_clk(&dev->dev);
return 0;
fail_powergatedelay:
attr = &pdata->power_attrib->power_attr[NVHOST_POWER_SYSFS_ATTRIB_CLOCKGATE_DELAY];
sysfs_remove_file(pdata->power_kobj, &attr->attr);
fail_clockdelay:
kobject_put(pdata->power_kobj);
fail_attrib_alloc:
kfree(pdata->power_attrib);
return err;
}
EXPORT_SYMBOL(nvhost_module_init);
int nvhost_module_suspend(struct device *dev)
{
struct nvhost_device_data *pdata = dev_get_drvdata(dev);
/*
* device_prepare takes one ref, so expect usage count to
* be 1 at this point.
*/
if (atomic_read(&dev->power.usage_count) > 1)
return -EBUSY;
if (pdata->prepare_poweroff)
pdata->prepare_poweroff(to_platform_device(dev));
if (pdata->suspend_ndev)
pdata->suspend_ndev(dev);
/* inform edp governor that there is no load any more */
if (pdata->gpu_edp_device)
tegra_edp_notify_gpu_load(0, 0);
return 0;
}
EXPORT_SYMBOL(nvhost_module_suspend);
int nvhost_module_resume(struct device *dev)
{
struct nvhost_device_data *pdata = dev_get_drvdata(dev);
if (pdata->finalize_poweron)
pdata->finalize_poweron(to_platform_device(dev));
return 0;
}
EXPORT_SYMBOL(nvhost_module_resume);
void nvhost_module_deinit(struct platform_device *dev)
{
int i;
struct kobj_attribute *attr = NULL;
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
if (!pm_runtime_enabled(&dev->dev))
nvhost_module_disable_clk(&dev->dev);
else
pm_runtime_disable(&dev->dev);
nvhost_module_suspend(&dev->dev);
for (i = 0; i < pdata->num_clks; i++)
clk_put(pdata->clk[i]);
if (pdata->power_kobj) {
for (i = 0; i < NVHOST_POWER_SYSFS_ATTRIB_MAX; i++) {
attr = &pdata->power_attrib->power_attr[i];
sysfs_remove_file(pdata->power_kobj, &attr->attr);
}
kobject_put(pdata->power_kobj);
}
}
#ifdef CONFIG_PM
const struct dev_pm_ops nvhost_module_pm_ops = {
#if defined(CONFIG_PM_RUNTIME) && !defined(CONFIG_PM_GENERIC_DOMAINS)
.runtime_suspend = nvhost_module_disable_clk,
.runtime_resume = nvhost_module_enable_clk,
#endif
};
#endif
EXPORT_SYMBOL(nvhost_module_pm_ops);
/*FIXME Use API to get host1x domain */
struct generic_pm_domain *host1x_domain;
int _nvhost_module_add_domain(struct generic_pm_domain *domain,
struct platform_device *pdev, bool client)
{
int ret = 0;
struct nvhost_device_data *pdata;
struct dev_power_governor *pm_domain_gov = NULL;
pdata = platform_get_drvdata(pdev);
if (!pdata)
return -EINVAL;
#ifdef CONFIG_PM_GENERIC_DOMAINS
if (!pdata->can_powergate)
pm_domain_gov = &pm_domain_always_on_gov;
if (__pm_genpd_name_add_device(domain->name, &pdev->dev, NULL)) {
pm_genpd_init(domain, pm_domain_gov, true);
domain->power_off = nvhost_module_power_off;
domain->power_on = nvhost_module_power_on;
domain->dev_ops.start = nvhost_module_enable_clk;
domain->dev_ops.stop = nvhost_module_disable_clk;
domain->dev_ops.save_state = nvhost_module_prepare_poweroff;
domain->dev_ops.restore_state = nvhost_module_finalize_poweron;
if (client) {
domain->dev_ops.suspend = nvhost_module_suspend;
domain->dev_ops.resume = nvhost_module_resume;
}
/* Set only host1x as wakeup capable */
device_set_wakeup_capable(&pdev->dev, !client);
ret = pm_genpd_add_device(domain, &pdev->dev);
if (pdata->powergate_delay)
pm_genpd_set_poweroff_delay(domain,
pdata->powergate_delay);
if (client)
pm_genpd_add_subdomain(host1x_domain, domain);
else {
tegra_pd_add_sd(domain);
host1x_domain = domain;
}
}
#endif
return ret;
}
void nvhost_register_client_domain(struct generic_pm_domain *domain)
{
pm_genpd_add_subdomain(host1x_domain, domain);
}
EXPORT_SYMBOL(nvhost_register_client_domain);
/* common runtime pm and power domain APIs */
int nvhost_module_add_domain(struct generic_pm_domain *domain,
struct platform_device *pdev)
{
if (!strcmp(domain->name, "tegra-host1x"))
return _nvhost_module_add_domain(domain, pdev, 0);
else
return _nvhost_module_add_domain(domain, pdev, 1);
}
EXPORT_SYMBOL(nvhost_module_add_domain);
int nvhost_module_enable_clk(struct device *dev)
{
int index = 0;
struct nvhost_device_data *pdata;
/* enable parent's clock if required */
if (dev->parent && dev->parent != &platform_bus)
nvhost_module_enable_clk(dev->parent);
pdata = dev_get_drvdata(dev);
if (!pdata)
return -EINVAL;
for (index = 0; index < pdata->num_clks; index++) {
int err = clk_prepare_enable(pdata->clk[index]);
if (err) {
dev_err(dev, "Cannot turn on clock %s",
pdata->clocks[index].name);
return -EINVAL;
}
}
return 0;
}
EXPORT_SYMBOL(nvhost_module_enable_clk);
int nvhost_module_disable_clk(struct device *dev)
{
int index = 0;
struct nvhost_device_data *pdata;
pdata = dev_get_drvdata(dev);
if (!pdata)
return -EINVAL;
for (index = 0; index < pdata->num_channels; index++)
if (pdata->channels[index])
nvhost_channel_suspend(pdata->channels[index]);
for (index = 0; index < pdata->num_clks; index++)
clk_disable_unprepare(pdata->clk[index]);
/* disable parent's clock if required */
if (dev->parent && dev->parent != &platform_bus)
nvhost_module_disable_clk(dev->parent);
return 0;
}
EXPORT_SYMBOL(nvhost_module_disable_clk);
#ifdef CONFIG_PM_GENERIC_DOMAINS
static int nvhost_module_power_on(struct generic_pm_domain *domain)
{
struct nvhost_device_data *pdata;
pdata = container_of(domain, struct nvhost_device_data, pd);
mutex_lock(&pdata->lock);
if (pdata->can_powergate) {
do_unpowergate_locked(pdata->powergate_ids[0]);
do_unpowergate_locked(pdata->powergate_ids[1]);
}
mutex_unlock(&pdata->lock);
return 0;
}
static int nvhost_module_power_off(struct generic_pm_domain *domain)
{
struct nvhost_device_data *pdata;
pdata = container_of(domain, struct nvhost_device_data, pd);
mutex_lock(&pdata->lock);
if (pdata->can_powergate) {
do_powergate_locked(pdata->powergate_ids[0]);
do_powergate_locked(pdata->powergate_ids[1]);
}
mutex_unlock(&pdata->lock);
return 0;
}
int nvhost_module_prepare_poweroff(struct device *dev)
{
struct nvhost_device_data *pdata;
pdata = dev_get_drvdata(dev);
if (!pdata)
return -EINVAL;
if (pdata->prepare_poweroff)
pdata->prepare_poweroff(to_platform_device(dev));
return 0;
}
int nvhost_module_finalize_poweron(struct device *dev)
{
struct nvhost_device_data *pdata;
int ret = 0;
pdata = dev_get_drvdata(dev);
if (!pdata)
return -EINVAL;
if (pdata->finalize_poweron)
ret = pdata->finalize_poweron(to_platform_device(dev));
return ret;
}
#endif
/* public host1x power management APIs */
bool nvhost_module_powered_ext(struct platform_device *dev)
{
if (dev->dev.parent && dev->dev.parent != &platform_bus)
dev = to_platform_device(dev->dev.parent);
return nvhost_module_powered(dev);
}
int nvhost_module_busy_ext(struct platform_device *dev)
{
if (dev->dev.parent && dev->dev.parent != &platform_bus)
dev = to_platform_device(dev->dev.parent);
return nvhost_module_busy(dev);
}
EXPORT_SYMBOL(nvhost_module_busy_ext);
void nvhost_module_idle_ext(struct platform_device *dev)
{
if (dev->dev.parent && dev->dev.parent != &platform_bus)
dev = to_platform_device(dev->dev.parent);
nvhost_module_idle(dev);
}
EXPORT_SYMBOL(nvhost_module_idle_ext);
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