Add extern func, "tegra_ahb_enable_smmu()" to inform AHB that SMMU is
ready.
Signed-off-by: Hiroshi DOYU <hdoyu@xxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
---
arch/arm/mach-tegra/include/mach/tegra-ahb.h | 19 +++++++++++++++++++
drivers/platform/arm/tegra-ahb.c | 24 ++++++++++++++++++++++++
2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/include/mach/tegra-ahb.h b/arch/arm/mach-tegra/include/mach/tegra-ahb.h
new file mode 100644
index 0000000..296688c
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra-ahb.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __MACH_TEGRA_AHB_H__
+#define __MACH_TEGRA_AHB_H__
+
+extern int tegra_ahb_enable_smmu(void);
+
+#endif /* __MACH_TEGRA_AHB_H__ */
diff --git a/drivers/platform/arm/tegra-ahb.c b/drivers/platform/arm/tegra-ahb.c
index dcad2ec..7ad9dfd 100644
--- a/drivers/platform/arm/tegra-ahb.c
+++ b/drivers/platform/arm/tegra-ahb.c
@@ -78,6 +78,10 @@
#define AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID 0xf8
+#define AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE BIT(17)
+
+static struct platform_driver tegra_ahb_driver;
+
static u32 tegra_ahb_gizmo[] = {
AHB_ARBITRATION_DISABLE,
AHB_ARBITRATION_PRIORITY_CTRL,
@@ -126,6 +130,26 @@ static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset)
writel(value, ahb->regs + offset);
}
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+static int __tegra_ahb_enable_smmu(struct device *dev, void *data)
+{
+ u32 val;
+ struct tegra_ahb *ahb = dev_get_drvdata(dev);
+
+ val = gizmo_readl(ahb, AHB_ARBITRATION_XBAR_CTRL);
+ val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE;
+ gizmo_writel(ahb, val, AHB_ARBITRATION_XBAR_CTRL);
+ return 0;
+}
+
+int tegra_ahb_enable_smmu(void)
+{
+ return driver_for_each_device(&tegra_ahb_driver.driver, NULL, NULL,
+ __tegra_ahb_enable_smmu);
+}
+EXPORT_SYMBOL(tegra_ahb_enable_smmu);
+#endif
+
static int tegra_ahb_suspend(struct device *dev)
{
int i;
--
1.7.5.4
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