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Input: cyapa - add power management interfaces support for the device

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Add suspend_scanrate_ms power management interfaces in device's
power group, so users or applications can control the power management
strategy of trackpad device according to their requirements.

Signed-off-by: Dudley Du <dudl@cypress.com>
Tested-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dudley Du 2015-01-17 18:56:18 -08:00 committed by Dmitry Torokhov
parent 6972a85960
commit 22e7db8111
1 changed files with 136 additions and 0 deletions
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136
drivers/input/mouse/cyapa.c
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@ -604,6 +604,136 @@ out:
return IRQ_HANDLED;
}
/*
**************************************************************
* sysfs interface
**************************************************************
*/
#ifdef CONFIG_PM_SLEEP
static ssize_t cyapa_show_suspend_scanrate(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
u8 pwr_cmd = cyapa->suspend_power_mode;
u16 sleep_time;
int len;
int error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
pwr_cmd = cyapa->suspend_power_mode;
sleep_time = cyapa->suspend_sleep_time;
mutex_unlock(&cyapa->state_sync_lock);
switch (pwr_cmd) {
case PWR_MODE_BTN_ONLY:
len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME);
break;
case PWR_MODE_OFF:
len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME);
break;
default:
len = scnprintf(buf, PAGE_SIZE, "%u\n",
cyapa->gen == CYAPA_GEN3 ?
cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
sleep_time);
break;
}
return len;
}
static ssize_t cyapa_update_suspend_scanrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
u16 sleep_time;
int error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) {
cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY;
} else if (sysfs_streq(buf, OFF_MODE_NAME)) {
cyapa->suspend_power_mode = PWR_MODE_OFF;
} else if (!kstrtou16(buf, 10, &sleep_time)) {
cyapa->suspend_sleep_time = max_t(u16, sleep_time, 1000);
cyapa->suspend_power_mode =
cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time);
} else {
count = -EINVAL;
}
mutex_unlock(&cyapa->state_sync_lock);
return count;
}
static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR,
cyapa_show_suspend_scanrate,
cyapa_update_suspend_scanrate);
static struct attribute *cyapa_power_wakeup_entries[] = {
&dev_attr_suspend_scanrate_ms.attr,
NULL,
};
static const struct attribute_group cyapa_power_wakeup_group = {
.name = power_group_name,
.attrs = cyapa_power_wakeup_entries,
};
static void cyapa_remove_power_wakeup_group(void *data)
{
struct cyapa *cyapa = data;
sysfs_unmerge_group(&cyapa->client->dev.kobj,
&cyapa_power_wakeup_group);
}
static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
{
struct i2c_client *client = cyapa->client;
struct device *dev = &client->dev;
int error;
if (device_can_wakeup(dev)) {
error = sysfs_merge_group(&client->dev.kobj,
&cyapa_power_wakeup_group);
if (error) {
dev_err(dev, "failed to add power wakeup group: %d\n",
error);
return error;
}
error = devm_add_action(dev,
cyapa_remove_power_wakeup_group, cyapa);
if (error) {
cyapa_remove_power_wakeup_group(cyapa);
dev_err(dev, "failed to add power cleanup action: %d\n",
error);
return error;
}
}
return 0;
}
#else
static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
{
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static int cyapa_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
@ -643,6 +773,12 @@ static int cyapa_probe(struct i2c_client *client,
return error;
}
error = cyapa_prepare_wakeup_controls(cyapa);
if (error) {
dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
return error;
}
error = devm_request_threaded_irq(dev, client->irq,
NULL, cyapa_irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,