From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/sh/kernel/cpu/sh3/clock-sh7712.c | 71 +++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 arch/sh/kernel/cpu/sh3/clock-sh7712.c

(limited to 'arch/sh/kernel/cpu/sh3/clock-sh7712.c')

diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7712.c b/arch/sh/kernel/cpu/sh3/clock-sh7712.c
new file mode 100644
index 00000000..21438a9a
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh7712.c
@@ -0,0 +1,71 @@
+/*
+ * arch/sh/kernel/cpu/sh3/clock-sh7712.c
+ *
+ * SH7712 support for the clock framework
+ *
+ *  Copyright (C) 2007  Andrew Murray <amurray@mpc-data.co.uk>
+ *
+ * Based on arch/sh/kernel/cpu/sh3/clock-sh3.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>
+
+static int multipliers[] = { 1, 2, 3 };
+static int divisors[]    = { 1, 2, 3, 4, 6 };
+
+static void master_clk_init(struct clk *clk)
+{
+	int frqcr = __raw_readw(FRQCR);
+	int idx = (frqcr & 0x0300) >> 8;
+
+	clk->rate *= multipliers[idx];
+}
+
+static struct sh_clk_ops sh7712_master_clk_ops = {
+	.init		= master_clk_init,
+};
+
+static unsigned long module_clk_recalc(struct clk *clk)
+{
+	int frqcr = __raw_readw(FRQCR);
+	int idx = frqcr & 0x0007;
+
+	return clk->parent->rate / divisors[idx];
+}
+
+static struct sh_clk_ops sh7712_module_clk_ops = {
+	.recalc		= module_clk_recalc,
+};
+
+static unsigned long cpu_clk_recalc(struct clk *clk)
+{
+	int frqcr = __raw_readw(FRQCR);
+	int idx = (frqcr & 0x0030) >> 4;
+
+	return clk->parent->rate / divisors[idx];
+}
+
+static struct sh_clk_ops sh7712_cpu_clk_ops = {
+	.recalc		= cpu_clk_recalc,
+};
+
+static struct sh_clk_ops *sh7712_clk_ops[] = {
+	&sh7712_master_clk_ops,
+	&sh7712_module_clk_ops,
+	&sh7712_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
+{
+	if (idx < ARRAY_SIZE(sh7712_clk_ops))
+		*ops = sh7712_clk_ops[idx];
+}
+
-- 
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