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/*
* drivers/base/interface.c - common driverfs interface that's exported to
* the world for all devices.
* Copyright (c) 2002 Patrick Mochel
* 2002 Open Source Development Lab
*/
#include <linux/device.h>
#include <linux/err.h>
#include <linux/stat.h>
#include <linux/string.h>
static ssize_t device_read_name(struct device * dev, char * buf)
{
return sprintf(buf,"%s\n",dev->name);
}
static DEVICE_ATTR(name,S_IRUGO,device_read_name,NULL);
static ssize_t
device_read_power(struct device * dev, char * page)
{
return sprintf(page,"%d\n",dev->power_state);
}
static ssize_t
device_write_power(struct device * dev, const char * buf, size_t count)
{
char str_command[20];
char str_level[20];
int num_args;
u32 state;
u32 int_level;
int error = 0;
if (!dev->driver)
goto done;
num_args = sscanf(buf,"%10s %10s %u",str_command,str_level,&state);
error = -EINVAL;
if (!num_args)
goto done;
if (!strnicmp(str_command,"suspend",7)) {
if (num_args != 3)
goto done;
if (!strnicmp(str_level,"notify",6))
int_level = SUSPEND_NOTIFY;
else if (!strnicmp(str_level,"save",4))
int_level = SUSPEND_SAVE_STATE;
else if (!strnicmp(str_level,"disable",7))
int_level = SUSPEND_DISABLE;
else if (!strnicmp(str_level,"powerdown",8))
int_level = SUSPEND_POWER_DOWN;
else
goto done;
if (dev->driver->suspend)
error = dev->driver->suspend(dev,state,int_level);
else
error = 0;
} else if (!strnicmp(str_command,"resume",6)) {
if (num_args != 2)
goto done;
if (!strnicmp(str_level,"poweron",7))
int_level = RESUME_POWER_ON;
else if (!strnicmp(str_level,"restore",7))
int_level = RESUME_RESTORE_STATE;
else if (!strnicmp(str_level,"enable",6))
int_level = RESUME_ENABLE;
else
goto done;
if (dev->driver->resume)
error = dev->driver->resume(dev,int_level);
else
error = 0;
}
done:
return error < 0 ? error : count;
}
static DEVICE_ATTR(power,S_IWUSR | S_IRUGO,
device_read_power,device_write_power);
struct attribute * dev_default_attrs[] = {
&dev_attr_name.attr,
&dev_attr_power.attr,
NULL,
};
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