firmware: google: Add a module_coreboot_driver() macro and use it

Remove some boiler plate code we have in three drivers with a single
line each time. This also gets us a free assignment of the driver .owner
field, making these drivers work better as modules.

Cc: Wei-Ning Huang <wnhuang@chromium.org>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Samuel Holland <samuel@sholland.org>
Cc: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 13 insertions, 39 deletions

diff --git a/drivers/firmware/google/coreboot_table.h b/drivers/firmware/google/coreboot_table.h
index 71a9de6b15fa..054fa9374c59 100644
--- a/drivers/firmware/google/coreboot_table.h
+++ b/drivers/firmware/google/coreboot_table.h
@@ -20,6 +20,7 @@
 #ifndef __COREBOOT_TABLE_H
 #define __COREBOOT_TABLE_H
 
+#include <linux/device.h>
 #include <linux/io.h>
 
 /* Coreboot table header structure */
@@ -91,4 +92,13 @@ int coreboot_driver_register(struct coreboot_driver *driver);
 /* Unregister a driver that uses the data from a coreboot table. */
 void coreboot_driver_unregister(struct coreboot_driver *driver);
 
+/* module_coreboot_driver() - Helper macro for drivers that don't do
+ * anything special in module init/exit.  This eliminates a lot of
+ * boilerplate.  Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit()
+ */
+#define module_coreboot_driver(__coreboot_driver) \
+        module_driver(__coreboot_driver, coreboot_driver_register, \
+                        coreboot_driver_unregister)
+
 #endif /* __COREBOOT_TABLE_H */
diff --git a/drivers/firmware/google/framebuffer-coreboot.c b/drivers/firmware/google/framebuffer-coreboot.c
index b8b49c067157..69a43116211c 100644
--- a/drivers/firmware/google/framebuffer-coreboot.c
+++ b/drivers/firmware/google/framebuffer-coreboot.c
@@ -97,19 +97,7 @@ static struct coreboot_driver framebuffer_driver = {
         },
         .tag = CB_TAG_FRAMEBUFFER,
 };
-
-static int __init coreboot_framebuffer_init(void)
-{
-        return coreboot_driver_register(&framebuffer_driver);
-}
-
-static void coreboot_framebuffer_exit(void)
-{
-        coreboot_driver_unregister(&framebuffer_driver);
-}
-
-module_init(coreboot_framebuffer_init);
-module_exit(coreboot_framebuffer_exit);
+module_coreboot_driver(framebuffer_driver);
 
 MODULE_AUTHOR("Samuel Holland <samuel@sholland.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/firmware/google/memconsole-coreboot.c b/drivers/firmware/google/memconsole-coreboot.c
index b29e10757bfb..86331807f1d5 100644
--- a/drivers/firmware/google/memconsole-coreboot.c
+++ b/drivers/firmware/google/memconsole-coreboot.c
@@ -116,19 +116,7 @@ static struct coreboot_driver memconsole_driver = {
         },
         .tag = CB_TAG_CBMEM_CONSOLE,
 };
-
-static void coreboot_memconsole_exit(void)
-{
-        coreboot_driver_unregister(&memconsole_driver);
-}
-
-static int __init coreboot_memconsole_init(void)
-{
-        return coreboot_driver_register(&memconsole_driver);
-}
-
-module_exit(coreboot_memconsole_exit);
-module_init(coreboot_memconsole_init);
+module_coreboot_driver(memconsole_driver);
 
 MODULE_AUTHOR("Google, Inc.");
 MODULE_LICENSE("GPL");
diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c
index f240946ed701..12547386bac8 100644
--- a/drivers/firmware/google/vpd.c
+++ b/drivers/firmware/google/vpd.c
@@ -324,19 +324,7 @@ static struct coreboot_driver vpd_driver = {
         },
         .tag = CB_TAG_VPD,
 };
-
-static int __init coreboot_vpd_init(void)
-{
-        return coreboot_driver_register(&vpd_driver);
-}
-
-static void __exit coreboot_vpd_exit(void)
-{
-        coreboot_driver_unregister(&vpd_driver);
-}
-
-module_init(coreboot_vpd_init);
-module_exit(coreboot_vpd_exit);
+module_coreboot_driver(vpd_driver);
 
 MODULE_AUTHOR("Google, Inc.");
 MODULE_LICENSE("GPL");