samsung update 1

1 files changed, 95 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/setup-gsc.c b/arch/arm/mach-exynos/setup-gsc.c
new file mode 100644
index 0000000..493d756
--- /dev/null
+++ b/arch/arm/mach-exynos/setup-gsc.c
@@ -0,0 +1,95 @@
+/* linux/arch/arm/mach-exynos/setup-gsc.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *             http://www.samsung.com
+ *
+ * Base Exynos5 G-Scaler clock configuration
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <plat/clock.h>
+#include <plat/devs.h>
+#include <mach/regs-clock.h>
+#include <mach/map.h>
+#include <media/exynos_gscaler.h>
+
+void __init exynos5_gsc_set_pdev_name(int id, char *name)
+{
+	switch (id) {
+	case 0:
+		exynos5_device_gsc0.name = name;
+		break;
+	case 1:
+		exynos5_device_gsc1.name = name;
+		break;
+	case 2:
+		exynos5_device_gsc2.name = name;
+		break;
+	case 3:
+		exynos5_device_gsc3.name = name;
+		break;
+	}
+}
+
+int __init exynos5_gsc_set_parent_clock(const char *child, const char *parent)
+{
+	struct clk *clk_parent;
+	struct clk *clk_child;
+
+	clk_child = clk_get(NULL, child);
+	if (IS_ERR(clk_child)) {
+		pr_err("failed to get %s clock.\n", child);
+		return PTR_ERR(clk_child);
+	}
+
+	clk_parent = clk_get(NULL, parent);
+	if (IS_ERR(clk_parent)) {
+		clk_put(clk_child);
+		pr_err("failed to get %s clock.\n", parent);
+		return PTR_ERR(clk_parent);
+	}
+
+	if (clk_set_parent(clk_child, clk_parent)) {
+		pr_err("Unable to set parent %s of clock %s.\n",
+				clk_parent->name, clk_child->name);
+		clk_put(clk_child);
+		clk_put(clk_parent);
+		return PTR_ERR(clk_child);
+	}
+
+	clk_put(clk_child);
+	clk_put(clk_parent);
+
+	return 0;
+}
+
+int __init exynos5_gsc_set_clock_rate(const char *clk, unsigned long clk_rate)
+{
+	struct clk *gsc_clk;
+
+	gsc_clk = clk_get(NULL, clk);
+	if (IS_ERR(gsc_clk)) {
+		pr_err("failed to get %s clock.\n", clk);
+		return PTR_ERR(gsc_clk);
+	}
+
+	if (!clk_rate)
+		clk_rate = 310000000UL;
+
+	if (clk_set_rate(gsc_clk, clk_rate)) {
+		pr_err("%s rate change failed: %lu\n", gsc_clk->name, clk_rate);
+		clk_put(gsc_clk);
+		return PTR_ERR(gsc_clk);
+	}
+
+	clk_put(gsc_clk);
+
+	return 0;
+}