This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / kernel / cpu / sh4a / clock-sh7770.c

diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7770.c b/arch/sh/kernel/cpu/sh4a/clock-sh7770.c
new file mode 100644 (file)
index 0000000..c8694ba
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/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];
+}
+