From: Zhang Rui <[EMAIL PROTECTED]>
Add an ACPI attribute to indicate ACPICA version.
/proc/acpi/version is deprecated by /sys/firmware/acpi/info.
Signed-off-by: Zhang Rui <[EMAIL PROTECTED]>
---
drivers/acpi/Kconfig | 3 ++-
drivers/acpi/system.c | 43 +++++++++++++++++++++++++++++++++++++------
include/acpi/acpi_bus.h | 7 +++++++
3 files changed, 46 insertions(+), 7 deletions(-)
Index: linux-2.6.20-rc4-mm1/drivers/acpi/system.c
===================================================================
--- linux-2.6.20-rc4-mm1.orig/drivers/acpi/system.c 2007-01-21
12:58:31.000000000 +0800
+++ linux-2.6.20-rc4-mm1/drivers/acpi/system.c 2007-01-21 13:03:44.000000000
+0800
@@ -29,6 +29,7 @@
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("acpi_system")
@@ -42,8 +43,24 @@ ACPI_MODULE_NAME("acpi_system")
extern struct fadt_descriptor acpi_fadt;
/* --------------------------------------------------------------------------
+ FS Interface (/sys)
+ --------------------------------------------------------------------------
*/
+extern struct subsystem acpi_subsys;
+
+static ssize_t version_show(struct subsystem *subsys, char *buf)
+{
+ return sprintf(buf, "%x\n", ACPI_CA_VERSION);
+}
+acpi_ro_attr(version);
+
+static int acpi_system_info_add_sysfs(void)
+{
+ return sysfs_create_file(&acpi_subsys.kset.kobj, &version_attr.attr);
+}
+/* --------------------------------------------------------------------------
FS Interface (/proc)
--------------------------------------------------------------------------
*/
+#ifdef CONFIG_ACPI_PROCFS
static int acpi_system_read_info(struct seq_file *seq, void *offset)
{
@@ -63,6 +80,7 @@ static const struct file_operations acpi
.llseek = seq_lseek,
.release = single_release,
};
+#endif
static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
loff_t *);
@@ -118,16 +136,13 @@ acpi_system_read_fadt(struct file *file,
return res;
}
-static int __init acpi_system_init(void)
+static int acpi_system_procfs_init(void)
{
struct proc_dir_entry *entry;
int error = 0;
char *name;
-
- if (acpi_disabled)
- return 0;
-
+#ifdef CONFIG_ACPI_PROCFS
/* 'info' [R] */
name = ACPI_SYSTEM_FILE_INFO;
entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
@@ -136,6 +151,7 @@ static int __init acpi_system_init(void)
else {
entry->proc_fops = &acpi_system_info_ops;
}
+#endif
/* 'dsdt' [R] */
name = ACPI_SYSTEM_FILE_DSDT;
@@ -159,10 +175,25 @@ static int __init acpi_system_init(void)
Error:
remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
+#ifdef CONFIG_ACPI_PROCFS
remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
-
+#endif
error = -EFAULT;
goto Done;
}
+static int __init acpi_system_init(void) {
+ int result;
+
+ if (acpi_disabled)
+ return 0;
+
+ result = acpi_system_info_add_sysfs();
+ if (result)
+ return result;
+
+ result = acpi_system_procfs_init();
+
+ return result;
+}
subsys_initcall(acpi_system_init);
Index: linux-2.6.20-rc4-mm1/drivers/acpi/Kconfig
===================================================================
--- linux-2.6.20-rc4-mm1.orig/drivers/acpi/Kconfig 2007-01-21
12:58:31.000000000 +0800
+++ linux-2.6.20-rc4-mm1/drivers/acpi/Kconfig 2007-01-21 13:02:23.000000000
+0800
@@ -87,7 +87,8 @@ config ACPI_PROCFS
and this proc interface will be removed some time later,
it's marked as deprecated.
( /proc/acpi/debug_layer && debug_level are deprecated by
- /sys/module/acpi/parameters/debug_layer && debug_level. )
+ /sys/module/acpi/parameters/debug_layer && debug_level.
+ /proc/acpi/info is deprecated by /sys/firmware/acpi/version )
config ACPI_AC
tristate "AC Adapter"
Index: linux-2.6.20-rc4-mm1/include/acpi/acpi_bus.h
===================================================================
--- linux-2.6.20-rc4-mm1.orig/include/acpi/acpi_bus.h 2007-01-21
12:58:31.000000000 +0800
+++ linux-2.6.20-rc4-mm1/include/acpi/acpi_bus.h 2007-01-21
13:04:34.000000000 +0800
@@ -320,6 +320,13 @@ struct acpi_bus_event {
extern struct subsystem acpi_subsys;
/*
+ * This is for ACPI read only data
+ * Like ACPICA version, ACPI tables, etc.
+ */
+#define acpi_ro_attr(_name) \
+static struct subsys_attribute _name##_attr = __ATTR_RO(_name)
+
+/*
* External Functions
*/
-
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