mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 14:14:01 +08:00
cc079f8cf7
The Kconfig for this driver is currently:
config ACPI_BGRT
bool "Boottime Graphics Resource Table support"
...meaning that it currently is not being built as a module by anyone.
Lets remove all modular references, so that when reading the driver
there is no doubt it is builtin-only.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
|
|
* BGRT boot graphic support
|
|
* Authors: Matthew Garrett, Josh Triplett <josh@joshtriplett.org>
|
|
* Copyright 2012 Red Hat, Inc <mjg@redhat.com>
|
|
* Copyright 2012 Intel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/efi-bgrt.h>
|
|
|
|
static struct kobject *bgrt_kobj;
|
|
|
|
static ssize_t show_version(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab->version);
|
|
}
|
|
static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
|
|
|
|
static ssize_t show_status(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab->status);
|
|
}
|
|
static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
|
|
|
|
static ssize_t show_type(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab->image_type);
|
|
}
|
|
static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
|
|
|
|
static ssize_t show_xoffset(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab->image_offset_x);
|
|
}
|
|
static DEVICE_ATTR(xoffset, S_IRUGO, show_xoffset, NULL);
|
|
|
|
static ssize_t show_yoffset(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab->image_offset_y);
|
|
}
|
|
static DEVICE_ATTR(yoffset, S_IRUGO, show_yoffset, NULL);
|
|
|
|
static ssize_t image_read(struct file *file, struct kobject *kobj,
|
|
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
|
|
{
|
|
memcpy(buf, attr->private + off, count);
|
|
return count;
|
|
}
|
|
|
|
static BIN_ATTR_RO(image, 0); /* size gets filled in later */
|
|
|
|
static struct attribute *bgrt_attributes[] = {
|
|
&dev_attr_version.attr,
|
|
&dev_attr_status.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_xoffset.attr,
|
|
&dev_attr_yoffset.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct bin_attribute *bgrt_bin_attributes[] = {
|
|
&bin_attr_image,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group bgrt_attribute_group = {
|
|
.attrs = bgrt_attributes,
|
|
.bin_attrs = bgrt_bin_attributes,
|
|
};
|
|
|
|
static int __init bgrt_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (!bgrt_image)
|
|
return -ENODEV;
|
|
|
|
bin_attr_image.private = bgrt_image;
|
|
bin_attr_image.size = bgrt_image_size;
|
|
|
|
bgrt_kobj = kobject_create_and_add("bgrt", acpi_kobj);
|
|
if (!bgrt_kobj)
|
|
return -EINVAL;
|
|
|
|
ret = sysfs_create_group(bgrt_kobj, &bgrt_attribute_group);
|
|
if (ret)
|
|
goto out_kobject;
|
|
|
|
return 0;
|
|
|
|
out_kobject:
|
|
kobject_put(bgrt_kobj);
|
|
return ret;
|
|
}
|
|
device_initcall(bgrt_init);
|