reset: lpc18xx: make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

drivers/reset/Kconfig:config RESET_LPC18XX
drivers/reset/Kconfig: bool "LPC18xx/43xx Reset Driver" if COMPILE_TEST
drivers/reset/Kconfig: default ARCH_LPC18XX

or

arch/arm/Kconfig:config ARCH_LPC18XX
arch/arm/Kconfig: bool "NXP LPC18xx/LPC43xx"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

We explicitly disallow a driver unbind, since that doesn't have a
sensible use case anyway, and it allows us to drop the ".remove"
code for non-modular drivers.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

Cc: Joachim Eastwood <[e-mail]>
Signed-off-by: Paul Gortmaker <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

drivers/reset/reset-lpc18xx.c

···
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/io.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
···
 	return ret;
 }
 
-static int lpc18xx_rgu_remove(struct platform_device *pdev)
-{
-	struct lpc18xx_rgu_data *rc = platform_get_drvdata(pdev);
-	int ret;
-
-	ret = unregister_restart_handler(&rc->restart_nb);
-	if (ret)
-		dev_warn(&pdev->dev, "failed to unregister restart handler\n");
-
-	reset_controller_unregister(&rc->rcdev);
-
-	clk_disable_unprepare(rc->clk_delay);
-	clk_disable_unprepare(rc->clk_reg);
-
-	return 0;
-}
-
 static const struct of_device_id lpc18xx_rgu_match[] = {
 	{ .compatible = "nxp,lpc1850-rgu" },
 	{ }
 };
-MODULE_DEVICE_TABLE(of, lpc18xx_rgu_match);
 
 static struct platform_driver lpc18xx_rgu_driver = {
 	.probe	= lpc18xx_rgu_probe,
-	.remove	= lpc18xx_rgu_remove,
 	.driver	= {
-		.name		= "lpc18xx-reset",
-		.of_match_table	= lpc18xx_rgu_match,
+		.name			= "lpc18xx-reset",
+		.of_match_table		= lpc18xx_rgu_match,
+		.suppress_bind_attrs	= true,
 	},
 };
-module_platform_driver(lpc18xx_rgu_driver);
-
-MODULE_AUTHOR("Joachim Eastwood <[e-mail]>");
-MODULE_DESCRIPTION("Reset driver for LPC18xx/43xx RGU");
-MODULE_LICENSE("GPL v2");
+builtin_platform_driver(lpc18xx_rgu_driver);