sh: sh7712 clock support

This patch provides specific clock support for the SH7712.

Signed-off-by: Andrew Murray <amurray@mpc-data.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/kernel/cpu/sh3/Makefile b/arch/sh/kernel/cpu/sh3/Makefile
index 1afd05e..3ae4d91 100644 (file)
--- 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 (file)
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 <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 = 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 (file)
--- 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