linux-kernel - [PATCH v4 09/20] memory: tegra: Adapt to Tegra20 device-tree binding changes

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Date:   Mon, 24 Sep 2018 03:41:42 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 09/20] memory: tegra: Adapt to Tegra20 device-tree binding changes

The tegra20-mc device-tree binding has been changed, GART has been
squashed into Memory Controller and now the clock property is mandatory
for Tegra20, the DT compatible has been changed as well. Adapt driver to
the DT changes.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/memory/tegra/mc.c | 21 ++++++++-------------
 drivers/memory/tegra/mc.h |  6 ------
 include/soc/tegra/mc.h    |  2 +-
 3 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index e56862495f36..1b4ceefd82f9 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -51,7 +51,7 @@
 
 static const struct of_device_id tegra_mc_of_match[] = {
 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
-	{ .compatible = "nvidia,tegra20-mc", .data = &tegra20_mc_soc },
+	{ .compatible = "nvidia,tegra20-mc-gart", .data = &tegra20_mc_soc },
 #endif
 #ifdef CONFIG_ARCH_TEGRA_3x_SOC
 	{ .compatible = "nvidia,tegra30-mc", .data = &tegra30_mc_soc },
@@ -638,24 +638,19 @@ static int tegra_mc_probe(struct platform_device *pdev)
 	if (IS_ERR(mc->regs))
 		return PTR_ERR(mc->regs);
 
+	mc->clk = devm_clk_get(&pdev->dev, "mc");
+	if (IS_ERR(mc->clk)) {
+		dev_err(&pdev->dev, "failed to get MC clock: %ld\n",
+			PTR_ERR(mc->clk));
+		return PTR_ERR(mc->clk);
+	}
+
 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
 	if (mc->soc == &tegra20_mc_soc) {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-		mc->regs2 = devm_ioremap_resource(&pdev->dev, res);
-		if (IS_ERR(mc->regs2))
-			return PTR_ERR(mc->regs2);
-
 		isr = tegra20_mc_irq;
 	} else
 #endif
 	{
-		mc->clk = devm_clk_get(&pdev->dev, "mc");
-		if (IS_ERR(mc->clk)) {
-			dev_err(&pdev->dev, "failed to get MC clock: %ld\n",
-				PTR_ERR(mc->clk));
-			return PTR_ERR(mc->clk);
-		}
-
 		err = tegra_mc_setup_latency_allowance(mc);
 		if (err < 0) {
 			dev_err(&pdev->dev, "failed to setup latency allowance: %d\n",
diff --git a/drivers/memory/tegra/mc.h b/drivers/memory/tegra/mc.h
index 01065f12ebeb..9856f085e487 100644
--- a/drivers/memory/tegra/mc.h
+++ b/drivers/memory/tegra/mc.h
@@ -26,18 +26,12 @@
 
 static inline u32 mc_readl(struct tegra_mc *mc, unsigned long offset)
 {
-	if (mc->regs2 && offset >= 0x24)
-		return readl(mc->regs2 + offset - 0x3c);
-
 	return readl(mc->regs + offset);
 }
 
 static inline void mc_writel(struct tegra_mc *mc, u32 value,
 			     unsigned long offset)
 {
-	if (mc->regs2 && offset >= 0x24)
-		return writel(value, mc->regs2 + offset - 0x3c);
-
 	writel(value, mc->regs + offset);
 }
 
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index b43f37fea096..db5bfdf589b4 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -144,7 +144,7 @@ struct tegra_mc_soc {
 struct tegra_mc {
 	struct device *dev;
 	struct tegra_smmu *smmu;
-	void __iomem *regs, *regs2;
+	void __iomem *regs;
 	struct clk *clk;
 	int irq;
 
-- 
2.19.0