1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Author: Sudeep Holla <sudeep.holla@arm.com>
* Copyright 2022 Arm Limited
*/
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/completion.h>
#include <linux/idr.h>
#include <linux/io.h>
static struct acpi_ffh_info ffh_ctx;
int __weak acpi_ffh_address_space_arch_setup(void *handler_ctxt,
void **region_ctxt)
{
return -EOPNOTSUPP;
}
int __weak acpi_ffh_address_space_arch_handler(acpi_integer *value,
void *region_context)
{
return -EOPNOTSUPP;
}
static acpi_status
acpi_ffh_address_space_setup(acpi_handle region_handle, u32 function,
void *handler_context, void **region_context)
{
return acpi_ffh_address_space_arch_setup(handler_context,
region_context);
}
static acpi_status
acpi_ffh_address_space_handler(u32 function, acpi_physical_address addr,
u32 bits, acpi_integer *value,
void *handler_context, void *region_context)
{
return acpi_ffh_address_space_arch_handler(value, region_context);
}
void __init acpi_init_ffh(void)
{
acpi_status status;
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_FIXED_HARDWARE,
&acpi_ffh_address_space_handler,
&acpi_ffh_address_space_setup,
&ffh_ctx);
if (ACPI_FAILURE(status))
pr_alert("OperationRegion handler could not be installed\n");
}
|
