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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/sh/kernel/cpu/sh3/clock-sh3.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/sh/kernel/cpu/sh3/clock-sh3.c')
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh3.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh3.c b/arch/sh/kernel/cpu/sh3/clock-sh3.c
new file mode 100644
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--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh3.c
@@ -0,0 +1,89 @@
+/*
+ * arch/sh/kernel/cpu/sh3/clock-sh3.c
+ *
+ * Generic SH-3 support for the clock framework
+ *
+ * Copyright (C) 2005 Paul Mundt
+ *
+ * FRQCR parsing hacked out of arch/sh/kernel/time.c
+ *
+ * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
+ * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
+ * Copyright (C) 2002, 2003, 2004 Paul Mundt
+ * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
+ *
+ * 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 stc_multipliers[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
+static int ifc_divisors[] = { 1, 2, 3, 4, 1, 1, 1, 1 };
+static int pfc_divisors[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
+
+static void master_clk_init(struct clk *clk)
+{
+ int frqcr = __raw_readw(FRQCR);
+ int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
+
+ clk->rate *= pfc_divisors[idx];
+}
+
+static struct sh_clk_ops sh3_master_clk_ops = {
+ .init = master_clk_init,
+};
+
+static unsigned long module_clk_recalc(struct clk *clk)
+{
+ int frqcr = __raw_readw(FRQCR);
+ int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
+
+ return clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct sh_clk_ops sh3_module_clk_ops = {
+ .recalc = module_clk_recalc,
+};
+
+static unsigned long bus_clk_recalc(struct clk *clk)
+{
+ int frqcr = __raw_readw(FRQCR);
+ int idx = ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4);
+
+ return clk->parent->rate / stc_multipliers[idx];
+}
+
+static struct sh_clk_ops sh3_bus_clk_ops = {
+ .recalc = bus_clk_recalc,
+};
+
+static unsigned long cpu_clk_recalc(struct clk *clk)
+{
+ int frqcr = __raw_readw(FRQCR);
+ int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
+
+ return clk->parent->rate / ifc_divisors[idx];
+}
+
+static struct sh_clk_ops sh3_cpu_clk_ops = {
+ .recalc = cpu_clk_recalc,
+};
+
+static struct sh_clk_ops *sh3_clk_ops[] = {
+ &sh3_master_clk_ops,
+ &sh3_module_clk_ops,
+ &sh3_bus_clk_ops,
+ &sh3_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
+{
+ if (idx < ARRAY_SIZE(sh3_clk_ops))
+ *ops = sh3_clk_ops[idx];
+}
+