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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
*/
#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/slab.h>
MODULE_DESCRIPTION("Intel Rapid Start Technology Driver");
MODULE_LICENSE("GPL");
static ssize_t irst_show_wakeup_events(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct acpi_device *acpi;
unsigned long long value;
acpi_status status;
acpi = to_acpi_device(dev);
status = acpi_evaluate_integer(acpi->handle, "GFFS", NULL, &value);
if (ACPI_FAILURE(status))
return -EINVAL;
return sprintf(buf, "%lld\n", value);
}
static ssize_t irst_store_wakeup_events(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi;
acpi_status status;
unsigned long value;
int error;
acpi = to_acpi_device(dev);
error = kstrtoul(buf, 0, &value);
if (error)
return error;
status = acpi_execute_simple_method(acpi->handle, "SFFS", value);
if (ACPI_FAILURE(status))
return -EINVAL;
return count;
}
static struct device_attribute irst_wakeup_attr = {
.attr = { .name = "wakeup_events", .mode = 0600 },
.show = irst_show_wakeup_events,
.store = irst_store_wakeup_events
};
static ssize_t irst_show_wakeup_time(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct acpi_device *acpi;
unsigned long long value;
acpi_status status;
acpi = to_acpi_device(dev);
status = acpi_evaluate_integer(acpi->handle, "GFTV", NULL, &value);
if (ACPI_FAILURE(status))
return -EINVAL;
return sprintf(buf, "%lld\n", value);
}
static ssize_t irst_store_wakeup_time(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi;
acpi_status status;
unsigned long value;
int error;
acpi = to_acpi_device(dev);
error = kstrtoul(buf, 0, &value);
if (error)
return error;
status = acpi_execute_simple_method(acpi->handle, "SFTV", value);
if (ACPI_FAILURE(status))
return -EINVAL;
return count;
}
static struct device_attribute irst_timeout_attr = {
.attr = { .name = "wakeup_time", .mode = 0600 },
.show = irst_show_wakeup_time,
.store = irst_store_wakeup_time
};
static int irst_add(struct acpi_device *acpi)
{
int error;
error = device_create_file(&acpi->dev, &irst_timeout_attr);
if (unlikely(error))
return error;
error = device_create_file(&acpi->dev, &irst_wakeup_attr);
if (unlikely(error))
device_remove_file(&acpi->dev, &irst_timeout_attr);
return error;
}
static void irst_remove(struct acpi_device *acpi)
{
device_remove_file(&acpi->dev, &irst_wakeup_attr);
device_remove_file(&acpi->dev, &irst_timeout_attr);
}
static const struct acpi_device_id irst_ids[] = {
{"INT3392", 0},
{"", 0}
};
static struct acpi_driver irst_driver = {
.name = "intel_rapid_start",
.class = "intel_rapid_start",
.ids = irst_ids,
.ops = {
.add = irst_add,
.remove = irst_remove,
},
};
module_acpi_driver(irst_driver);
MODULE_DEVICE_TABLE(acpi, irst_ids);
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