linux-kernel - [PATCH v2] reset: meson: make it possible to build as a module

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Message-Id: <20201019144809.943608-1-narmstrong@baylibre.com>
Date:   Mon, 19 Oct 2020 16:48:09 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     p.zabel@...gutronix.de
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>
Subject: [PATCH v2] reset: meson: make it possible to build as a module

In order to reduce the kernel Image size on multi-platform distributions,
make it possible to build the reset controller driver as a module.

This partially reverts 8290924e ("reset: meson: make it explicitly non-modular")

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Reviewed-by: Kevin Hilman <khilman@...libre.com>
Tested-by: Kevin Hilman <khilman@...libre.com>
---
Changes since v1 at [1]:
- Fix Kconfig depends
- Add missing MODULE_DEVICE_TABLE
- Add kevin's review & test tags

[1] http://lore.kernel.org/r/20201013133943.412119-1-narmstrong@baylibre.com

 drivers/reset/Kconfig       | 3 ++-
 drivers/reset/reset-meson.c | 8 +++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index d9efbfd29646..9a36111cfd2c 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -94,7 +94,8 @@ config RESET_LPC18XX
 	  This enables the reset controller driver for NXP LPC18xx/43xx SoCs.
 
 config RESET_MESON
-	bool "Meson Reset Driver" if COMPILE_TEST
+	tristate "Meson Reset Driver"
+	depends on ARCH_MESON || COMPILE_TEST
 	default ARCH_MESON
 	help
 	  This enables the reset driver for Amlogic Meson SoCs.
diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c
index 94d7ba88d7d2..c9bc325ad65a 100644
--- a/drivers/reset/reset-meson.c
+++ b/drivers/reset/reset-meson.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
 #include <linux/slab.h>
@@ -104,6 +105,7 @@ static const struct of_device_id meson_reset_dt_ids[] = {
 	 { .compatible = "amlogic,meson-a1-reset",   .data = &meson_a1_param},
 	 { /* sentinel */ },
 };
+MODULE_DEVICE_TABLE(of, meson_reset_dt_ids);
 
 static int meson_reset_probe(struct platform_device *pdev)
 {
@@ -142,4 +144,8 @@ static struct platform_driver meson_reset_driver = {
 		.of_match_table	= meson_reset_dt_ids,
 	},
 };
-builtin_platform_driver(meson_reset_driver);
+module_platform_driver(meson_reset_driver);
+
+MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver");
+MODULE_AUTHOR("Neil Armstrong <narmstrong@...libre.com>");
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.25.1