1 files changed, 116 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7763.c b/arch/sh/kernel/cpu/sh4a/clock-sh7763.c
new file mode 100644
index 000000000..aaff4b968
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7763.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/sh4a/clock-sh7763.c
+ *
+ * SH7763 support for the clock framework
+ *
+ *  Copyright (C) 2005  Paul Mundt
+ *  Copyright (C) 2007  Yoshihiro Shimoda
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+#include <asm/io.h>
+
+static int bfc_divisors[] = { 1, 1, 1, 8, 1, 1, 1, 1 };
+static int p0fc_divisors[] = { 1, 1, 1, 8, 1, 1, 1, 1 };
+static int cfc_divisors[] = { 1, 1, 4, 1, 1, 1, 1, 1 };
+
+static void master_clk_init(struct clk *clk)
+{
+	clk->rate *= p0fc_divisors[(__raw_readl(FRQCR) >> 4) & 0x07];
+}
+
+static struct sh_clk_ops sh7763_master_clk_ops = {
+	.init		= master_clk_init,
+};
+
+static unsigned long module_clk_recalc(struct clk *clk)
+{
+	int idx = ((__raw_readl(FRQCR) >> 4) & 0x07);
+	return clk->parent->rate / p0fc_divisors[idx];
+}
+
+static struct sh_clk_ops sh7763_module_clk_ops = {
+	.recalc		= module_clk_recalc,
+};
+
+static unsigned long bus_clk_recalc(struct clk *clk)
+{
+	int idx = ((__raw_readl(FRQCR) >> 16) & 0x07);
+	return clk->parent->rate / bfc_divisors[idx];
+}
+
+static struct sh_clk_ops sh7763_bus_clk_ops = {
+	.recalc		= bus_clk_recalc,
+};
+
+static struct sh_clk_ops sh7763_cpu_clk_ops = {
+	.recalc		= followparent_recalc,
+};
+
+static struct sh_clk_ops *sh7763_clk_ops[] = {
+	&sh7763_master_clk_ops,
+	&sh7763_module_clk_ops,
+	&sh7763_bus_clk_ops,
+	&sh7763_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
+{
+	if (idx < ARRAY_SIZE(sh7763_clk_ops))
+		*ops = sh7763_clk_ops[idx];
+}
+
+static unsigned long shyway_clk_recalc(struct clk *clk)
+{
+	int idx = ((__raw_readl(FRQCR) >> 20) & 0x07);
+	return clk->parent->rate / cfc_divisors[idx];
+}
+
+static struct sh_clk_ops sh7763_shyway_clk_ops = {
+	.recalc		= shyway_clk_recalc,
+};
+
+static struct clk sh7763_shyway_clk = {
+	.flags		= CLK_ENABLE_ON_INIT,
+	.ops		= &sh7763_shyway_clk_ops,
+};
+
+/*
+ * Additional SH7763-specific on-chip clocks that aren't already part of the
+ * clock framework
+ */
+static struct clk *sh7763_onchip_clocks[] = {
+	&sh7763_shyway_clk,
+};
+
+static struct clk_lookup lookups[] = {
+	/* main clocks */
+	CLKDEV_CON_ID("shyway_clk", &sh7763_shyway_clk),
+};
+
+int __init arch_clk_init(void)
+{
+	struct clk *clk;
+	int i, ret = 0;
+
+	cpg_clk_init();
+
+	clk = clk_get(NULL, "master_clk");
+	for (i = 0; i < ARRAY_SIZE(sh7763_onchip_clocks); i++) {
+		struct clk *clkp = sh7763_onchip_clocks[i];
+
+		clkp->parent = clk;
+		ret |= clk_register(clkp);
+	}
+
+	clk_put(clk);
+
+	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+	return ret;
+}