Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c3aa92afd0a6c253df974556b4a43c0a182d1fc4
Commit: c3aa92afd0a6c253df974556b4a43c0a182d1fc4
Parent: 7d740a066fb9c6681c2898c7977209725c9e552f
Author: Andrew Murray <[EMAIL PROTECTED]>
AuthorDate: Tue Jan 8 09:56:45 2008 +0900
Committer: Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 13:19:02 2008 +0900
sh: sh7712 clock support
This patch provides specific clock support for the SH7712.
Signed-off-by: Andrew Murray <[EMAIL PROTECTED]>
Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
arch/sh/kernel/cpu/sh3/Makefile | 1 +
arch/sh/kernel/cpu/sh3/clock-sh7712.c | 71 +++++++++++++++++++++++++++++++++
include/asm-sh/cpu-sh3/freq.h | 5 ++
3 files changed, 77 insertions(+), 0 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh3/Makefile b/arch/sh/kernel/cpu/sh3/Makefile
index 1afd05e..3ae4d91 100644
--- a/arch/sh/kernel/cpu/sh3/Makefile
+++ b/arch/sh/kernel/cpu/sh3/Makefile
@@ -22,5 +22,6 @@ clock-$(CONFIG_CPU_SUBTYPE_SH7706) := clock-sh7706.o
clock-$(CONFIG_CPU_SUBTYPE_SH7709) := clock-sh7709.o
clock-$(CONFIG_CPU_SUBTYPE_SH7710) := clock-sh7710.o
clock-$(CONFIG_CPU_SUBTYPE_SH7720) := clock-sh7710.o
+clock-$(CONFIG_CPU_SUBTYPE_SH7712) := clock-sh7712.o
obj-y += $(clock-y)
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 0000000..54f54df
--- /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 <[EMAIL PROTECTED]>
+ *
+ * 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 = ctrl_inw(FRQCR);
+ int idx = (frqcr & 0x0300) >> 8;
+
+ clk->rate *= multipliers[idx];
+}
+
+static struct clk_ops sh7712_master_clk_ops = {
+ .init = master_clk_init,
+};
+
+static void module_clk_recalc(struct clk *clk)
+{
+ int frqcr = ctrl_inw(FRQCR);
+ int idx = frqcr & 0x0007;
+
+ clk->rate = clk->parent->rate / divisors[idx];
+}
+
+static struct clk_ops sh7712_module_clk_ops = {
+ .recalc = module_clk_recalc,
+};
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+ int frqcr = ctrl_inw(FRQCR);
+ int idx = (frqcr & 0x0030) >> 4;
+
+ clk->rate = clk->parent->rate / divisors[idx];
+}
+
+static struct clk_ops sh7712_cpu_clk_ops = {
+ .recalc = cpu_clk_recalc,
+};
+
+static struct clk_ops *sh7712_clk_ops[] = {
+ &sh7712_master_clk_ops,
+ &sh7712_module_clk_ops,
+ &sh7712_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+ if (idx < ARRAY_SIZE(sh7712_clk_ops))
+ *ops = sh7712_clk_ops[idx];
+}
+
diff --git a/include/asm-sh/cpu-sh3/freq.h b/include/asm-sh/cpu-sh3/freq.h
index 0a054b5..53c6230 100644
--- a/include/asm-sh/cpu-sh3/freq.h
+++ b/include/asm-sh/cpu-sh3/freq.h
@@ -10,7 +10,12 @@
#ifndef __ASM_CPU_SH3_FREQ_H
#define __ASM_CPU_SH3_FREQ_H
+#ifdef CONFIG_CPU_SUBTYPE_SH7712
+#define FRQCR 0xA415FF80
+#else
#define FRQCR 0xffffff80
+#endif
+
#define MIN_DIVISOR_NR 0
#define MAX_DIVISOR_NR 4
-
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