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

[linux-2.6.git] / arch / sh / kernel / cpu / sh2a / clock-sh7206.c

diff --git a/arch/sh/kernel/cpu/sh2a/clock-sh7206.c b/arch/sh/kernel/cpu/sh2a/clock-sh7206.c
new file mode 100644 (file)
index 0000000..a9ad309
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2a/clock-sh7206.c
@@ -0,0 +1,85 @@
+/*
+ * arch/sh/kernel/cpu/sh2a/clock-sh7206.c
+ *
+ * SH7206 support for the clock framework
+ *
+ *  Copyright (C) 2006  Yoshinori Sato
+ *
+ * Based on clock-sh4.c
+ *  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>
+
+const static int pll1rate[]={1,2,3,4,6,8};
+const static int pfc_divisors[]={1,2,3,4,6,8,12};
+#define ifc_divisors pfc_divisors
+
+#if (CONFIG_SH_CLK_MD == 2)
+#define PLL2 (4)
+#elif (CONFIG_SH_CLK_MD == 6)
+#define PLL2 (2)
+#elif (CONFIG_SH_CLK_MD == 7)
+#define PLL2 (1)
+#else
+#error "Illigal Clock Mode!"
+#endif
+
+static void master_clk_init(struct clk *clk)
+{
+       clk->rate *= PLL2 * pll1rate[(ctrl_inw(FREQCR) >> 8) & 0x0007];
+}
+
+static struct clk_ops sh7206_master_clk_ops = {
+       .init           = master_clk_init,
+};
+
+static void module_clk_recalc(struct clk *clk)
+{
+       int idx = (ctrl_inw(FREQCR) & 0x0007);
+       clk->rate = clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct clk_ops sh7206_module_clk_ops = {
+       .recalc         = module_clk_recalc,
+};
+
+static void bus_clk_recalc(struct clk *clk)
+{
+       clk->rate = clk->parent->rate / pll1rate[(ctrl_inw(FREQCR) >> 8) & 0x0007];
+}
+
+static struct clk_ops sh7206_bus_clk_ops = {
+       .recalc         = bus_clk_recalc,
+};
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+       int idx = (ctrl_inw(FREQCR) & 0x0007);
+       clk->rate = clk->parent->rate / ifc_divisors[idx];
+}
+
+static struct clk_ops sh7206_cpu_clk_ops = {
+       .recalc         = cpu_clk_recalc,
+};
+
+static struct clk_ops *sh7206_clk_ops[] = {
+       &sh7206_master_clk_ops,
+       &sh7206_module_clk_ops,
+       &sh7206_bus_clk_ops,
+       &sh7206_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+       if (idx < ARRAY_SIZE(sh7206_clk_ops))
+               *ops = sh7206_clk_ops[idx];
+}
+