| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <77BC725C9062764F874D79F51E1F1A8F4C902C39@S04-MBX01-01.s04.local>
Date: Mon, 30 Jun 2014 06:42:00 +0000
From: Dudley Du <dudl@...ress.com>
To: Alan Stern <stern@...land.harvard.edu>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
"patrikf@...gle.com" <patrikf@...gle.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>
CC: Benson Leung <bleung@...gle.com>,
Daniel Kurtz <djkurtz@...gle.com>,
"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 3/14] input: cyapa: add cyapa driver runtime power
management interfaces supported
Add runtime_suspend_scanrate_ms power management interfaces in device's
power group, so users or applications can control the runtime power
management strategy of trackpad device as their requirements.
TEST=test on Chomebooks.
Signed-off-by: Du, Dudley <dudl@...ress.com>
---
diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index 1dfc16d..c2b67d3 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -346,9 +346,16 @@ static int cyapa_check_is_operational(struct cyapa *cyapa)
static irqreturn_t cyapa_irq(int irq, void *dev_id)
{
struct cyapa *cyapa = dev_id;
+ struct device *dev = &cyapa->client->dev;
struct input_dev *input = cyapa->input;
bool cont;
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+
+ if (device_may_wakeup(dev))
+ pm_wakeup_event(dev, 0);
+
/* interrupt event maybe cuased by host command to trackpad device. */
cont = true;
if (cyapa->ops->cyapa_irq_cmd_handler)
@@ -373,6 +380,8 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id)
cyapa_state_sync_exit(cyapa);
}
+
+ pm_runtime_put_sync_autosuspend(dev);
out:
return IRQ_HANDLED;
}
@@ -574,6 +583,79 @@ static const struct attribute_group cyapa_power_wakeup_group = {
};
#endif /* CONFIG_PM_SLEEP */
+#ifdef CONFIG_PM_RUNTIME
+static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u8 pwr_cmd = cyapa->runtime_suspend_power_mode;
+
+ if (cyapa->gen == CYAPA_GEN3)
+ return scnprintf(buf, PAGE_SIZE, "%u\n",
+ cyapa_pwr_cmd_to_sleep_time(pwr_cmd));
+ else
+ return scnprintf(buf, PAGE_SIZE, "%u\n",
+ cyapa->runtime_suspend_sleep_time);
+}
+
+static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u16 time;
+
+ if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) {
+ dev_err(dev, "invalid runtime suspend scanrate ms parameter\n");
+ return -EINVAL;
+ }
+
+ /*
+ * When the suspend scanrate is changed, pm_runtime_get to resume
+ * a potentially suspended device, update to the new pwr_cmd
+ * and then pm_runtime_put to suspend into the new power mode.
+ */
+ pm_runtime_get_sync(dev);
+ cyapa->runtime_suspend_sleep_time = cyapa_sleep_time_check(time);
+ cyapa->runtime_suspend_power_mode =
+ cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time);
+ pm_runtime_put_sync_autosuspend(dev);
+ return count;
+}
+
+static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR,
+ cyapa_show_rt_suspend_scanrate,
+ cyapa_update_rt_suspend_scanrate);
+
+static struct attribute *cyapa_power_runtime_entries[] = {
+ &dev_attr_runtime_suspend_scanrate_ms.attr,
+ NULL,
+};
+
+static const struct attribute_group cyapa_power_runtime_group = {
+ .name = power_group_name,
+ .attrs = cyapa_power_runtime_entries,
+};
+
+static void cyapa_start_runtime(struct cyapa *cyapa)
+{
+ struct device *dev = &cyapa->client->dev;
+
+ cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE;
+ cyapa->runtime_suspend_sleep_time =
+ cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode);
+ if (sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group))
+ dev_warn(dev, "error creating wakeup runtime entries.\n");
+ pm_runtime_set_active(dev);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY);
+ pm_runtime_enable(dev);
+}
+#else
+static void cyapa_start_runtime(struct cyapa *cyapa) {}
+#endif /* CONFIG_PM_RUNTIME */
+
void cyapa_detect_async(void *data, async_cookie_t cookie)
{
struct cyapa *cyapa = (struct cyapa *)data;
@@ -589,7 +671,11 @@ void cyapa_detect_async(void *data, async_cookie_t cookie)
static void cyapa_detect_and_start(void *data, async_cookie_t cookie)
{
+ struct cyapa *cyapa = data;
+
cyapa_detect_async(data, cookie);
+
+ cyapa_start_runtime(cyapa);
}
static int cyapa_probe(struct i2c_client *client,
@@ -675,9 +761,15 @@ static int cyapa_remove(struct i2c_client *client)
{
struct cyapa *cyapa = i2c_get_clientdata(client);
+ pm_runtime_disable(&client->dev);
+
#ifdef CONFIG_PM_SLEEP
sysfs_unmerge_group(&client->dev.kobj, &cyapa_power_wakeup_group);
#endif
+
+#ifdef CONFIG_PM_RUNTIME
+ sysfs_unmerge_group(&client->dev.kobj, &cyapa_power_runtime_group);
+#endif
free_irq(cyapa->irq, cyapa);
input_unregister_device(cyapa->input);
@@ -735,12 +827,54 @@ static int cyapa_resume(struct device *dev)
async_schedule(cyapa_detect_async, cyapa);
+ /* runtime set active to reflect active state. */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
+#ifdef CONFIG_PM_RUNTIME
+static int cyapa_runtime_suspend(struct device *dev)
+{
+ int ret;
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+
+ if (cyapa->ops->cyapa_set_power_mode) {
+ /* set trackpad device to idle mode */
+ ret = cyapa->ops->cyapa_set_power_mode(cyapa,
+ cyapa->runtime_suspend_power_mode,
+ cyapa->runtime_suspend_sleep_time);
+ if (ret)
+ dev_err(dev, "runtime suspend failed, %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cyapa_runtime_resume(struct device *dev)
+{
+ int ret;
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+
+ if (cyapa->ops->cyapa_set_power_mode) {
+ /* resume to full active mode */
+ ret = cyapa->ops->cyapa_set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0);
+ if (ret)
+ dev_err(dev, "runtime resume failed, %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+#endif /* CONFIG_PM_RUNTIME */
+
static const struct dev_pm_ops cyapa_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume)
+ SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL)
};
static const struct i2c_device_id cyapa_id_table[] = {
diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h
index 1780d82..91fb84a 100644
--- a/drivers/input/mouse/cyapa.h
+++ b/drivers/input/mouse/cyapa.h
@@ -199,6 +199,10 @@ struct cyapa {
/* power mode settings */
u8 suspend_power_mode;
u16 suspend_sleep_time;
+#ifdef CONFIG_PM_RUNTIME
+ u8 runtime_suspend_power_mode;
+ u16 runtime_suspend_sleep_time;
+#endif /* CONFIG_PM_RUNTIME */
/* read from query data region. */
char product_id[16];
This message and any attachments may contain Cypress (or its subsidiaries) confidential information. If it has been received in error, please advise the sender and immediately delete this message.
Powered by blists - more mailing lists