firmware: coreboot: Let OF core populate platform device

Now that the /firmware/coreboot node in DT is populated by the core DT
platform code with commit 3aa0582fdb82 ("of: platform: populate
/firmware/ node from of_platform_default_populate_init()") we should and
can remove the platform device creation here. Otherwise, the
of_platform_device_create() call will fail, the coreboot of driver won't
be registered, and this driver will never bind. At the same time, we
should move this driver to use MODULE_DEVICE_TABLE so that module
auto-load works properly when the coreboot device is auto-populated and
we should drop the of_node handling that was presumably placed here to
hold a reference to the DT node created during module init that no
longer happens.

Cc: Wei-Ning Huang <wnhuang@chromium.org>
Cc: Julius Werner <jwerner@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Cc: Samuel Holland <samuel@sholland.org>
Reviewed-by: Sudeep Holla <Sudeep.Holla@arm.com>
Fixes: 3aa0582fdb82 ("of: platform: populate /firmware/ node from of_platform_default_populate_init()")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/google/coreboot_table-of.c b/drivers/firmware/google/coreboot_table-of.c
index f15bf40..9b90c0f 100644 (file)
--- a/drivers/firmware/google/coreboot_table-of.c
+++ b/drivers/firmware/google/coreboot_table-of.c
@@ -19,7 +19,6 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
-#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 
 #include "coreboot_table.h"
@@ -30,7 +29,6 @@ static int coreboot_table_of_probe(struct platform_device *pdev)
        void __iomem *ptr;
 
        ptr = of_iomap(fw_dn, 0);
-       of_node_put(fw_dn);
        if (!ptr)
                return -ENOMEM;
 
@@ -44,8 +42,9 @@ static int coreboot_table_of_remove(struct platform_device *pdev)
 
 static const struct of_device_id coreboot_of_match[] = {
        { .compatible = "coreboot" },
-       {},
+       {}
 };
+MODULE_DEVICE_TABLE(of, coreboot_of_match);
 
 static struct platform_driver coreboot_table_of_driver = {
        .probe = coreboot_table_of_probe,
@@ -55,28 +54,7 @@ static struct platform_driver coreboot_table_of_driver = {
                .of_match_table = coreboot_of_match,
        },
 };
-
-static int __init platform_coreboot_table_of_init(void)
-{
-       struct platform_device *pdev;
-       struct device_node *of_node;
-
-       /* Limit device creation to the presence of /firmware/coreboot node */
-       of_node = of_find_node_by_path("/firmware/coreboot");
-       if (!of_node)
-               return -ENODEV;
-
-       if (!of_match_node(coreboot_of_match, of_node))
-               return -ENODEV;
-
-       pdev = of_platform_device_create(of_node, "coreboot_table_of", NULL);
-       if (!pdev)
-               return -ENODEV;
-
-       return platform_driver_register(&coreboot_table_of_driver);
-}
-
-module_init(platform_coreboot_table_of_init);
+module_platform_driver(coreboot_table_of_driver);
 
 MODULE_AUTHOR("Google, Inc.");
 MODULE_LICENSE("GPL");