[PATCH v2] memory: mtk-smi: Support SMI modular

[Yong Wu]

This patch mainly support SMI modular. Switch MTK_SMI to tristate,
and add module_exit/module_license.

Signed-off-by: Yong Wu <yong.wu at mediatek.com>
---
This patch rebase on the clean v5.11-rc1.
and this one: memory: mtk-smi: Use platform_register_drivers
https://lore.kernel.org/linux-arm-kernel/20210121062429.26504-2-yong.wu@mediatek.com/

change note:
a) squash the last two of v1 into one patch.
b) Remove module_alias
---
 drivers/memory/Kconfig     | 2 +-
 drivers/memory/mtk-smi.c   | 9 +++++++++
 include/soc/mediatek/smi.h | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index 3ea6913df176..05c6d4a32285 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -173,7 +173,7 @@ config JZ4780_NEMC
 	  memory devices such as NAND and SRAM.
 
 config MTK_SMI
-	bool "Mediatek SoC Memory Controller driver" if COMPILE_TEST
+	tristate "MediaTek SoC Memory Controller driver" if COMPILE_TEST
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	help
 	  This driver is for the Memory Controller module in MediaTek SoCs,
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index e2aebd2bfa8e..3a269415db73 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -597,3 +597,12 @@ static int __init mtk_smi_init(void)
 	return platform_register_drivers(smidrivers, ARRAY_SIZE(smidrivers));
 }
 module_init(mtk_smi_init);
+
+static void __exit mtk_smi_exit(void)
+{
+	platform_unregister_drivers(smidrivers, ARRAY_SIZE(smidrivers));
+}
+module_exit(mtk_smi_exit);
+
+MODULE_DESCRIPTION("MediaTek SMI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h
index 5a34b87d89e3..29e2fb8f33d6 100644
--- a/include/soc/mediatek/smi.h
+++ b/include/soc/mediatek/smi.h
@@ -9,7 +9,7 @@
 #include <linux/bitops.h>
 #include <linux/device.h>
 
-#ifdef CONFIG_MTK_SMI
+#if IS_ENABLED(CONFIG_MTK_SMI)
 
 #define MTK_LARB_NR_MAX		16
 
-- 
2.18.0