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Message-ID: <0C997DD87CC88A4F86C897F52650B52B820E8F@MOLSON.mpc-data.co.uk>
Date: Mon, 31 Dec 2007 16:32:25 -0000
From: "Andrew Murray" <amurray@...-data.co.uk>
To: <lethal@...ux-sh.org>
Cc: <linux-sh@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] sh: sh7712 clock support
From: Andrew Murray <amurray@...-data.co.uk>
This patch provides specific clock support for the SH7712. (This is my first ever patch, so apologies if I've not followed the procedure correctly!)
Signed-off-by: Andrew Murray <amurray@...-data.co.uk>
---
diff -uprN -x sh-2.6/Documentation/dontdiff sh-2.6/arch/sh/kernel/cpu/sh3/clock-sh7712.c sh-2.6-devel/arch/sh/kernel/cpu/sh3/clock-sh7712.c
--- sh-2.6/arch/sh/kernel/cpu/sh3/clock-sh7712.c 1970-01-01 01:00:00.000000000 +0100
+++ sh-2.6-devel/arch/sh/kernel/cpu/sh3/clock-sh7712.c 2007-12-31 15:04:51.000000000 +0000
@@ -0,0 +1,81 @@
+/*
+ * arch/sh/kernel/cpu/sh3/clock-sh7712.c
+ *
+ * SH7712 support for the clock framework
+ *
+ * Copyright (C) 2007 Andrew Murray <amurray@...-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 = 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 bus_clk_init(struct clk *clk)
+{
+ clk->rate = CONFIG_SH_PCLK_FREQ;
+}
+
+static struct clk_ops sh7712_bus_clk_ops = {
+ .init = bus_clk_init,
+};
+
+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_bus_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 -uprN -x sh-2.6/Documentation/dontdiff sh-2.6/arch/sh/kernel/cpu/sh3/Makefile sh-2.6-devel/arch/sh/kernel/cpu/sh3/Makefile
--- sh-2.6/arch/sh/kernel/cpu/sh3/Makefile 2007-12-31 14:47:32.000000000 +0000
+++ sh-2.6-devel/arch/sh/kernel/cpu/sh3/Makefile 2007-12-31 15:01:15.000000000 +0000
@@ -22,5 +22,6 @@ clock-$(CONFIG_CPU_SUBTYPE_SH7706) := cl
clock-$(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 -uprN -x sh-2.6/Documentation/dontdiff sh-2.6/include/asm-sh/cpu-sh3/freq.h sh-2.6-devel/include/asm-sh/cpu-sh3/freq.h
--- sh-2.6/include/asm-sh/cpu-sh3/freq.h 2007-12-31 14:47:47.000000000 +0000
+++ sh-2.6-devel/include/asm-sh/cpu-sh3/freq.h 2007-12-31 15:02:30.000000000 +0000
@@ -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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Version: 7.5.516 / Virus Database: 269.17.8 - Release Date: 24/12/2007 00:00
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