1 files changed, 73 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh7770.c b/arch/sh/kernel/cpu/sh4/clock-sh7770.c
new file mode 100644
index 000000000000..c8694bac6477
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh7770.c
@@ -0,0 +1,73 @@
+/*
+ * arch/sh/kernel/cpu/sh4/clock-sh7770.c
+ *
+ * SH7770 support for the clock framework
+ *
+ *  Copyright (C) 2005  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+#include <asm/io.h>
+
+static int ifc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 1 };
+static int bfc_divisors[] = { 1, 1, 1, 1, 1, 8,12, 1 };
+static int pfc_divisors[] = { 1, 8, 1,10,12,16, 1, 1 };
+
+static void master_clk_init(struct clk *clk)
+{
+	clk->rate *= pfc_divisors[(ctrl_inl(FRQCR) >> 28) & 0x000f];
+}
+
+static struct clk_ops sh7770_master_clk_ops = {
+	.init		= master_clk_init,
+};
+
+static void module_clk_recalc(struct clk *clk)
+{
+	int idx = ((ctrl_inl(FRQCR) >> 28) & 0x000f);
+	clk->rate = clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct clk_ops sh7770_module_clk_ops = {
+	.recalc		= module_clk_recalc,
+};
+
+static void bus_clk_recalc(struct clk *clk)
+{
+	int idx = (ctrl_inl(FRQCR) & 0x000f);
+	clk->rate = clk->parent->rate / bfc_divisors[idx];
+}
+
+static struct clk_ops sh7770_bus_clk_ops = {
+	.recalc		= bus_clk_recalc,
+};
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+	int idx = ((ctrl_inl(FRQCR) >> 24) & 0x000f);
+	clk->rate = clk->parent->rate / ifc_divisors[idx];
+}
+
+static struct clk_ops sh7770_cpu_clk_ops = {
+	.recalc		= cpu_clk_recalc,
+};
+
+static struct clk_ops *sh7770_clk_ops[] = {
+	&sh7770_master_clk_ops,
+	&sh7770_module_clk_ops,
+	&sh7770_bus_clk_ops,
+	&sh7770_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+	if (idx < ARRAY_SIZE(sh7770_clk_ops))
+		*ops = sh7770_clk_ops[idx];
+}
+