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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/sh/kernel/cpu/sh3/clock-sh7706.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh3/clock-sh7706.c')
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh7706.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7706.c b/arch/sh/kernel/cpu/sh3/clock-sh7706.c
new file mode 100644
index 000000000..17855022c
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh7706.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/sh3/clock-sh7706.c
+ *
+ * SH7706 support for the clock framework
+ *
+ * Copyright (C) 2006 Takashi YOSHII
+ *
+ * Based on arch/sh/kernel/cpu/sh3/clock-sh7709.c
+ * Copyright (C) 2005 Andriy Skulysh
+ */
+#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, 4, 1, 3, 6, 1, 1 };
+static int ifc_divisors[] = { 1, 2, 4, 1, 3, 1, 1, 1 };
+static int pfc_divisors[] = { 1, 2, 4, 1, 3, 6, 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 sh7706_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 sh7706_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 sh7706_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 sh7706_cpu_clk_ops = {
+ .recalc = cpu_clk_recalc,
+};
+
+static struct sh_clk_ops *sh7706_clk_ops[] = {
+ &sh7706_master_clk_ops,
+ &sh7706_module_clk_ops,
+ &sh7706_bus_clk_ops,
+ &sh7706_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
+{
+ if (idx < ARRAY_SIZE(sh7706_clk_ops))
+ *ops = sh7706_clk_ops[idx];
+}