ACPI: add ACPICA version in sysfs
Add an ACPI attribute to indicate ACPICA version.
/proc/acpi/version is deprecated by /sys/module/acpi/parameters/acpica_version.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index d86dcb3..407b0e0 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -32,6 +32,11 @@
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("acpi_system")
+#ifdef MODULE_PARAM_PREFIX
+#undef MODULE_PARAM_PREFIX
+#endif
+#define MODULE_PARAM_PREFIX "acpi."
+
#define ACPI_SYSTEM_CLASS "system"
#define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver"
#define ACPI_SYSTEM_DEVICE_NAME "System"
@@ -41,9 +46,23 @@
#define ACPI_SYSTEM_FILE_FADT "fadt"
extern struct fadt_descriptor acpi_fadt;
+/*
+ * Make ACPICA version work as module param
+ */
+static int param_get_acpica_version(char *buffer, struct kernel_param *kp) {
+ int result;
+
+ result = sprintf(buffer, "%x", ACPI_CA_VERSION);
+
+ return result;
+}
+
+module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
+
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_PROCFS
static int acpi_system_read_info(struct seq_file *seq, void *offset)
{
@@ -63,6 +82,7 @@
.llseek = seq_lseek,
.release = single_release,
};
+#endif
static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
loff_t *);
@@ -128,6 +148,7 @@
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 +157,7 @@
else {
entry->proc_fops = &acpi_system_info_ops;
}
+#endif
/* 'dsdt' [R] */
name = ACPI_SYSTEM_FILE_DSDT;
@@ -159,7 +181,9 @@
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;