1 files changed, 84 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/csi.c b/arch/arm/mach-tegra/csi.c
new file mode 100644
index 00000000000..3b26c7ae223
--- /dev/null
+++ b/arch/arm/mach-tegra/csi.c
@@ -0,0 +1,84 @@
+/*
+ * arch/arm/mach-tegra/csi.c
+ *
+ * Copyright (C) 2010-2011 NVIDIA Corporation.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/iomap.h>
+#include <mach/csi.h>
+
+#include "clock.h"
+
+static struct clk *vi_clk;
+static struct clk *csi_clk;
+
+int tegra_vi_csi_writel(u32 val, u32 offset)
+{
+        if (vi_clk == NULL) {
+                vi_clk = tegra_get_clock_by_name("vi");
+                if (IS_ERR_OR_NULL(vi_clk)) {
+                        pr_err("vi: can't get vi clock\n");
+                        return -EINVAL;
+                }
+        }
+        clk_enable(vi_clk);
+
+        if (csi_clk == NULL) {
+                csi_clk = tegra_get_clock_by_name("csi");
+                if (IS_ERR_OR_NULL(csi_clk)) {
+                        pr_err("csi: can't get csi clock\n");
+                        return -EINVAL;
+                }
+        }
+        clk_enable(csi_clk);
+
+        writel(val, IO_TO_VIRT(TEGRA_VI_BASE) + offset * 4);
+
+        clk_disable(csi_clk);
+        clk_disable(vi_clk);
+        return 0;
+}
+
+int tegra_vi_csi_readl(u32 offset, u32 *val)
+{
+        if (vi_clk == NULL) {
+                vi_clk = tegra_get_clock_by_name("vi");
+                if (IS_ERR_OR_NULL(vi_clk)) {
+                        pr_err("vi: can't get vi clock\n");
+                        return -EINVAL;
+                }
+        }
+        clk_enable(vi_clk);
+
+        if (csi_clk == NULL) {
+                csi_clk = tegra_get_clock_by_name("csi");
+                if (IS_ERR_OR_NULL(csi_clk)) {
+                        pr_err("csi: can't get csi clock\n");
+                        return -EINVAL;
+                }
+        }
+        clk_enable(csi_clk);
+
+        *val = readl(IO_TO_VIRT(TEGRA_VI_BASE) + offset * 4);
+
+        clk_disable(csi_clk);
+        clk_disable(vi_clk);
+
+        return 0;
+}