static int
acpi_battery_write_alarm (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
int result = 0;
struct acpi_battery *battery = (struct acpi_battery *) data;
char alarm_string[12] = {'\0'};
ACPI_FUNCTION_TRACE("acpi_battery_write_alarm");
if (!battery || (count > sizeof(alarm_string) - 1))
return_VALUE(-EINVAL);
if (!battery->flags.present)
return_VALUE(-ENODEV);
if (copy_from_user(alarm_string, buffer, count))
return_VALUE(-EFAULT);
alarm_string[count] = '\0';
result = acpi_battery_set_alarm(battery,
simple_strtoul(alarm_string, NULL, 0));
if (result)
return_VALUE(result);
return_VALUE(count);
}
static ssize_t
acpi_battery_write_alarm(struct file *file,
const char __user * buffer,
size_t count, loff_t * ppos)
{
int result = 0;
char alarm_string[12] = { '\0' };
struct seq_file *m = (struct seq_file *)file->private_data;
struct acpi_battery *battery = (struct acpi_battery *)m->private;
if (!battery || (count > sizeof(alarm_string) - 1))
return -EINVAL;
if (!battery->flags.present)
return -ENODEV;
if (copy_from_user(alarm_string, buffer, count))
return -EFAULT;
alarm_string[count] = '\0';
result = acpi_battery_set_alarm(battery,
simple_strtoul(alarm_string, NULL, 0));
if (result)
return result;
return count;
}
static int
acpi_battery_check (
struct acpi_battery *battery)
{
int result = 0;
acpi_status status = AE_OK;
acpi_handle handle = NULL;
struct acpi_device *device = NULL;
struct acpi_battery_info *bif = NULL;
ACPI_FUNCTION_TRACE("acpi_battery_check");
if (!battery)
return_VALUE(-EINVAL);
result = acpi_bus_get_device(battery->handle, &device);
if (result)
return_VALUE(result);
result = acpi_bus_get_status(device);
if (result)
return_VALUE(result);
/* Insertion? */
if (!battery->flags.present && device->status.battery_present) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery inserted\n"));
/* Evalute _BIF to get certain static information */
result = acpi_battery_get_info(battery, &bif);
if (result)
return_VALUE(result);
battery->flags.power_unit = bif->power_unit;
battery->trips.warning = bif->design_capacity_warning;
battery->trips.low = bif->design_capacity_low;
kfree(bif);
/* See if alarms are supported, and if so, set default */
status = acpi_get_handle(battery->handle, "_BTP", &handle);
if (ACPI_SUCCESS(status)) {
battery->flags.alarm = 1;
acpi_battery_set_alarm(battery, battery->trips.warning);
}
}
/* Removal? */
else if (battery->flags.present && !device->status.battery_present) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery removed\n"));
}
battery->flags.present = device->status.battery_present;
return_VALUE(result);
}