linux-kernel - [PATCH v6 20/22] iommu/mediatek: Rename enable_4GB to dram_is

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Date:   Sun, 17 Feb 2019 17:04:58 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>
CC:     Evan Green <evgreen@...omium.org>, Tomasz Figa <tfiga@...gle.com>,
        Will Deacon <will.deacon@....com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <yingjoe.chen@...iatek.com>,
        <yong.wu@...iatek.com>, <youlin.pei@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        <anan.sun@...iatek.com>, Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v6 20/22] iommu/mediatek: Rename enable_4GB to dram_is_4gb

This patch only rename the variable name from enable_4GB to
dram_is_4gb for readable.

Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
 drivers/iommu/mtk_iommu.c | 10 +++++-----
 drivers/iommu/mtk_iommu.h |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 8742841..0277396 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -382,7 +382,7 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 	int ret;
 
 	/* The "4GB mode" M4U physically can not use the lower remap of Dram. */
-	if (data->plat_data->has_4gb_mode && data->enable_4GB)
+	if (data->plat_data->has_4gb_mode && data->dram_is_4gb)
 		paddr |= BIT_ULL(32);
 
 	spin_lock_irqsave(&dom->pgtlock, flags);
@@ -554,13 +554,13 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 	writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL);
 
 	if (data->plat_data->m4u_plat == M4U_MT8173)
-		regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
+		regval = (data->protect_base >> 1) | (data->dram_is_4gb << 31);
 	else
 		regval = lower_32_bits(data->protect_base) |
 			 upper_32_bits(data->protect_base);
 	writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR);
 
-	if (data->enable_4GB && data->plat_data->has_vld_pa_rng) {
+	if (data->dram_is_4gb && data->plat_data->has_vld_pa_rng) {
 		/*
 		 * If 4GB mode is enabled, the validate PA range is from
 		 * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30].
@@ -611,8 +611,8 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN);
 
-	/* Whether the current dram is over 4GB */
-	data->enable_4GB = !!(max_pfn > (BIT_ULL(32) >> PAGE_SHIFT));
+	/* Whether the current dram is 4GB. */
+	data->dram_is_4gb = !!(max_pfn > (BIT_ULL(32) >> PAGE_SHIFT));
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	data->base = devm_ioremap_resource(dev, res);
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index dedf05c..90e98a6 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -66,7 +66,7 @@ struct mtk_iommu_data {
 	struct mtk_iommu_domain		*m4u_dom;
 	struct iommu_group		*m4u_group;
 	struct mtk_smi_iommu		smi_imu;      /* SMI larb iommu info */
-	bool                            enable_4GB;
+	bool                            dram_is_4gb;
 	bool				tlb_flush_active;
 
 	struct iommu_device		iommu;
-- 
1.9.1