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

[linux-2.6.git] / arch / sh / kernel / cpu / sh4a / clock-sh7343.c

diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7343.c b/arch/sh/kernel/cpu/sh4a/clock-sh7343.c
new file mode 100644 (file)
index 0000000..1707a21
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7343.c
@@ -0,0 +1,99 @@
+/*
+ * arch/sh/kernel/cpu/sh4/clock-sh7343.c
+ *
+ * SH7343/SH7722 support for the clock framework
+ *
+ *  Copyright (C) 2006  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 <linux/io.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+
+/*
+ * SH7343/SH7722 uses a common set of multipliers and divisors, so this
+ * is quite simple..
+ */
+static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
+static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
+
+#define pll_calc() (((ctrl_inl(FRQCR) >> 24) & 0x1f) + 1)
+
+static void master_clk_init(struct clk *clk)
+{
+       clk->parent = clk_get(NULL, "cpu_clk");
+}
+
+static void master_clk_recalc(struct clk *clk)
+{
+       int idx = (ctrl_inl(FRQCR) & 0x000f);
+       clk->rate *= clk->parent->rate * multipliers[idx] / divisors[idx];
+}
+
+static struct clk_ops sh7343_master_clk_ops = {
+       .init           = master_clk_init,
+       .recalc         = master_clk_recalc,
+};
+
+static void module_clk_init(struct clk *clk)
+{
+       clk->parent = NULL;
+       clk->rate = CONFIG_SH_PCLK_FREQ;
+}
+
+static struct clk_ops sh7343_module_clk_ops = {
+       .init           = module_clk_init,
+};
+
+static void bus_clk_init(struct clk *clk)
+{
+       clk->parent = clk_get(NULL, "cpu_clk");
+}
+
+static void bus_clk_recalc(struct clk *clk)
+{
+       int idx = (ctrl_inl(FRQCR) >> 8) & 0x000f;
+       clk->rate = clk->parent->rate * multipliers[idx] / divisors[idx];
+}
+
+static struct clk_ops sh7343_bus_clk_ops = {
+       .init           = bus_clk_init,
+       .recalc         = bus_clk_recalc,
+};
+
+static void cpu_clk_init(struct clk *clk)
+{
+       clk->parent = clk_get(NULL, "module_clk");
+       clk->flags |= CLK_RATE_PROPAGATES;
+       clk_set_rate(clk, clk_get_rate(clk));
+}
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+       int idx = (ctrl_inl(FRQCR) >> 20) & 0x000f;
+       clk->rate = clk->parent->rate * pll_calc() *
+               multipliers[idx] / divisors[idx];
+}
+
+static struct clk_ops sh7343_cpu_clk_ops = {
+       .init           = cpu_clk_init,
+       .recalc         = cpu_clk_recalc,
+};
+
+static struct clk_ops *sh7343_clk_ops[] = {
+       &sh7343_master_clk_ops,
+       &sh7343_module_clk_ops,
+       &sh7343_bus_clk_ops,
+       &sh7343_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+       if (idx < ARRAY_SIZE(sh7343_clk_ops))
+               *ops = sh7343_clk_ops[idx];
+}