linux-kernel - [PATCH 1/2] iommu/mediatek-v1: Alloc building as module

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Message-ID: <20210323055801.16885-1-yong.wu@mediatek.com>
Date:   Tue, 23 Mar 2021 13:58:00 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Will Deacon <will@...nel.org>
CC:     Robin Murphy <robin.murphy@....com>,
        Tomasz Figa <tfiga@...omium.com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>,
        Krzysztof Kozlowski <krzk@...nel.org>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, Nicolas Boichat <drinkcat@...omium.org>,
        <anan.sun@...iatek.com>, <chao.hao@...iatek.com>
Subject: [PATCH 1/2] iommu/mediatek-v1: Alloc building as module

This patch only adds support for building the IOMMU-v1 driver as module.
Correspondingly switch the config to tristate.

Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
rebase on v5.12-rc2.
---
 drivers/iommu/Kconfig        | 2 +-
 drivers/iommu/mtk_iommu_v1.c | 9 ++++-----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 192ef8f61310..bc93da48bed0 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -364,7 +364,7 @@ config MTK_IOMMU
 	  If unsure, say N here.
 
 config MTK_IOMMU_V1
-	bool "MTK IOMMU Version 1 (M4U gen1) Support"
+	tristate "MediaTek IOMMU Version 1 (M4U gen1) Support"
 	depends on ARM
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	select ARM_DMA_USE_IOMMU
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index 82ddfe9170d4..71370037083a 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -20,6 +20,7 @@
 #include <linux/iommu.h>
 #include <linux/iopoll.h>
 #include <linux/list.h>
+#include <linux/module.h>
 #include <linux/of_address.h>
 #include <linux/of_iommu.h>
 #include <linux/of_irq.h>
@@ -691,9 +692,7 @@ static struct platform_driver mtk_iommu_driver = {
 		.pm = &mtk_iommu_pm_ops,
 	}
 };
+module_platform_driver(mtk_iommu_driver);
 
-static int __init m4u_init(void)
-{
-	return platform_driver_register(&mtk_iommu_driver);
-}
-subsys_initcall(m4u_init);
+MODULE_DESCRIPTION("IOMMU API for MediaTek M4U v1 implementations");
+MODULE_LICENSE("GPL v2");
-- 
2.18.0