ACPI: autoload modules - Create ACPI alias interface

Modify modpost (file2alias.c) to add acpi*:XYZ0001: alias in modules.alias
like:
grep acpi /lib/modules/2.6.22-rc4-default/modules.alias
alias acpi*:SNY5001:* sony_laptop
alias acpi*:SNY6001:* sony_laptop
for e.g. the sony_laptop module.
This module matches against all ACPI devices with a HID or CID of SNY5001
or SNY6001

Export an uevent and modalias sysfs file containing the string:
[MODALIAS=]acpi:PNP0C0C:
additional CIDs are concatenated at the end.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index f646381dc015..8a09021d8c59 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -290,6 +290,14 @@ static int do_serio_entry(const char *filename,
         return 1;
 }
 
+/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
+static int do_acpi_entry(const char *filename,
+                        struct acpi_device_id *id, char *alias)
+{
+        sprintf(alias, "acpi*:%s:", id->id);
+        return 1;
+}
+
 /* looks like: "pnp:dD" */
 static int do_pnp_entry(const char *filename,
                         struct pnp_device_id *id, char *alias)
@@ -551,6 +559,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
                 do_table(symval, sym->st_size,
                          sizeof(struct serio_device_id), "serio",
                          do_serio_entry, mod);
+        else if (sym_is(symname, "__mod_acpi_device_table"))
+                do_table(symval, sym->st_size,
+                         sizeof(struct acpi_device_id), "acpi",
+                         do_acpi_entry, mod);
         else if (sym_is(symname, "__mod_pnp_device_table"))
                 do_table(symval, sym->st_size,
                          sizeof(struct pnp_device_id), "pnp",